Patent Description:
A chemical battery, electrochemical battery, or electrochemical cell refers to a type of apparatus that converts chemical energy of positive and negative active substances into electrical energy through a redox reaction. Unlike an ordinary redox reaction, oxidation and reduction reactions are carried out separately, with the oxidation reaction taking place at a negative electrode and the reduction reaction taking place at a positive electrode, and gain and loss of electrons are carried out through an external circuit, and thus a current is formed. This is an essential characteristic of all batteries. After long-term research and development, the chemical battery has ushered in a situation of great varieties and wide applications, for example, it may be a huge apparatus that can accommodate a building, or a small apparatus in millimeter. With the development of modern electronic technology, high requirements are put forward for the chemical battery. Every breakthrough in chemical battery technology brings revolutionary development of an electronic device. Many electrochemical scientists in the world have focused their research and development interests in the field of chemical batteries that power electric automobiles.

As a kind of chemical battery, a lithium-ion battery has advantages of small size, high energy density, high power density, multiple cycle times, long storage time, and the like, and has been widely applied in some electronic devices, electric transport, electric toys and electric devices. For example, currently, the lithium-ion battery is widely applied in mobile phones, notebook computers, electromobiles, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, or the like.

With the continuous development of lithium-ion battery technology, higher requirements are put forward for performance of the lithium-ion battery. It is hoped that design factors in multiple aspects can be considered at the same time for the lithium-ion battery, and safety performance of the lithium-ion battery is particularly important. <CIT> provides a battery pack. The battery pack comprises a battery module, the battery module comprises a plurality of single batteries, each single battery comprises an explosion-proof valve, the explosion-proof valves are arranged on the bottom surfaces of one sides of the single batteries in the height direction, and the explosion-proof valves protrude out of the bottom surfaces; wherein a cavity structure is arranged at the bottom of the box body; the bonding layer is used for bonding the bottom surfaces of the single batteries to the bottom of the box body; wherein a weak area is arranged at the bottom of the box body towards the structural layer of the explosion-proof valve; the explosion-proof valve corresponds to the weak area in position; gas exhausted by the explosion-proof valve can be collected into the cavity structure through the weak area and exhausted. In the application, the bonding layer bonds the bottom surface of the single battery to the bottom of the box body, and the explosion-proof valve protrudes out of the bottom surface of the single battery, so that high-temperature and high-pressure gas exhausted by the explosion-proof valve cannot be jetted towards the direction of the vehicle cabin, and the safety in the vehicle cabin is prevented from being influenced; and the bonding layer cannot enter the space between the explosion-proof valve and the bottom of the box body, exhaust during explosion of the explosion-proof valve cannot be blocked, and waste gas emission of the battery pack cannot be affected. <CIT> discloses a heat insulation assembly of a battery pack. The heat insulation assembly of the battery pack comprises a module upper cover, a sealing component and a fireproof cotton pad, wherein the sealing component, the module upper cover and the fireproof cotton pad are sequentially arranged from bottom to top; mutually independent exhaust channels are isolated between the top of each battery cell and the upper cover plate of the box body; therefore, when high-temperature gas is exhausted from the pressure release valves of the individual battery cells, the high-temperature gas cannot spread to the positions of other battery cells, the environment temperature of the other battery cells is increased, explosion and fire of the whole battery pack caused by thermal runaway of the individual battery cells are avoided, and the safety coefficient of the battery pack is improved. <CIT> discloses a battery pack. The battery pack comprises a box body, wherein the bottom of the box body is of a cavity structure; and a plurality of single batteries, which are stacked on the bottom of the box body, an explosion-proof valve being arranged on the end surface, facing the bottom of the box body, of each single battery, wherein a weak area is arranged on the structural layer, facing the explosion-proof valve, of the bottom of the box body, and when any single battery is in thermal runaway, gas in the single battery can be collected into the cavity structure through the weak area and exhausted. High-temperature and high-pressure gas generated by thermal runaway of the battery pack is jetted in the direction deviating from the vehicle cabin, and gas in the box body can be rapidly exhausted to the external environment, so that the battery pack has the characteristic of high safety.

The accompanying drawings described herein are intended to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and the description thereof are used to explain the present application and do not constitute an undue limitation to the present application. In the drawings:.

To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings showing a plurality of embodiments according to the present application. It should be understood that, the described embodiments are merely some of, rather than all of, the embodiments of the present application.

Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the technical art to which the present application pertains. Terms used in the specification of the present application are merely for the purpose of describing specific embodiments, but are not intended to limit the present application. The terms "comprising", "including", "having", "possessing", "containing", "involving" and the like in the specification, the claims as well as the foregoing description of the foregoing accompanying drawings of the present application are open words. Therefore, a method or apparatus "comprising", "including" or "having" for example one or more steps or elements, has one or more steps or elements, but is not limited to merely having the one or more elements. The terms "first", "second", and the like in the specification, the claims, or the foregoing accompanying drawings of the present application, are intended to distinguish between different objects, rather than to describe a specific order or primary-secondary relationship. In addition, the terms "first" and "second" are only intended for the purpose of description, and shall not be understood as an indication or implication of relative importance or implicit indication of the quantity of indicated technical features. Therefore, a feature limited by "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, unless otherwise provided, "a plurality of" means two or more than two.

In the description of the present application, it should be understood that orientations or positional relationships indicated by terms such as "center", "crosswise", "length", "width", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial direction", "radial direction" and "circumferential direction" are orientations or positional relationships shown based on the drawings, and the terms are merely for convenience of describing the present application and for simplifying the description, but for indicating or implying that an indicated apparatus or element must have a specific orientation, and must be constructed and operated in a specific orientation, which thus may not be understood as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and defined otherwise, terms "installation", "interconnection", "connection" and "attachment" should be understood broadly, for example, they may either be a fixed connection, or a detachable connection, or an integral connection; and they may either be a direct connection, or an indirect connection through an intermediary, and they may be an internal connection between two elements. Those of ordinary skill in the art may appreciate the specific meanings of the foregoing terms in the present application according to specific conditions.

The phrase "embodiment" mentioned in the present application means that the specific features, structures, and characteristics described with reference to the embodiments may be included in at least one embodiment of the present application. The phrase at various locations in the specification does not necessarily refer to the same embodiment, or an independent or alternate embodiment that is mutually exclusive from another embodiment. Those skilled in the art understand, in explicit and implicit manners, that the embodiments described in the present application may be in combination with another embodiment.

As described above, it should be emphasized that the term "comprising/including", when used in this specification, is used to clearly specify the presence of stated features, integers, steps or assemblies, but do not preclude the presence or addition of one or more other features, integers, steps, or components or groups of features, integers, steps or components. As used in the present application, the singular form "a", "an" and "the" include plural forms unless the context clearly dictates otherwise.

The terms "a" and "an" in this specification can mean one, but may have the same meaning as "at least one" or "one or more". The term "about" generally means plus or minus <NUM>%, or more specifically plus or minus <NUM>%, of the mentioned value. The term "or" used in the claims means "and/or" unless it is clearly stated that it only refers to an alternative solution.

The term "and/or" in the present application merely describes an association relationship between associated objects, and indicates that there may be three relationships. For example, A and/or B may indicate three cases: A exists alone, both A and B exist, and B exists alone. In addition, the character "/" in the present application generally indicates that the associated previous and next objects are in the relationship of "or".

A battery mentioned in the field can be divided into a primary battery and a rechargeable battery according to whether it is rechargeable. The primary battery (Primary Battery) is also known as a "disposable" battery or a galvanic battery, because after its power is exhausted, it cannot be recharged and can only be discarded. The rechargeable battery is also called a secondary battery (Secondary Battery), a second-level battery, or a storage battery. Manufacturing materials and processes of the rechargeable battery are different from those of the primary battery. Its advantage is that it can be cycled multiple times after being charged, and output current load capacity of the rechargeable battery is higher than that of most primary batteries. At present, common types of rechargeable batteries are: a lead-acid battery, a Ni-MH battery and a lithium-ion battery. The lithium-ion battery has the advantages such as light weight, large capacity (<NUM> to <NUM> times that of Ni-MH battery of the same weight), and no memory effect, and has a very low self-discharge rate, so even if its price is relatively high, it still gets widely used. The lithium-ion battery is also used in battery electric vehicles and hybrid vehicles. The capacity of lithium-ion battery for this purpose is relatively low, but it has a larger output and charging current, and a longer service life, but a higher cost.

A battery described in an embodiment of the present application refers to a rechargeable battery. Hereinafter, the concept of the present application will be described mainly by an example of a lithium-ion battery. It should be understood that any other suitable type of a rechargeable battery is applicable. The battery mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module, a battery pack, and the like. The battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolytic solution and a separator, and is a basic structural unit of a battery module and a battery pack. Generally, the battery cell is divided into three types according to the way of packaging: a cylindrical battery cell, a prismatic battery cell and a pouch battery cell.

The operation of a lithium-ion battery cell mainly relies on movement of lithium ions between the positive electrode sheet and the negative electrode sheet. The lithium ion battery cell uses one embedded lithium compound as one electrode material. Currently, main common materials used as a cathode material of a lithium-ion battery are: lithium cobalt oxide (LiCoO<NUM>), lithium manganese oxide (LiMn<NUM>O<NUM>), lithium nickel oxide (LiNiO<NUM>) and lithium iron phosphate (LiFePO<NUM>). The separator is disposed between the positive electrode sheet and the negative electrode sheet to form a thin film structure with three layers of materials. The thin film structure is generally made into an electrode assembly in a desired shape by winding or stacking. For example, a thin film structure with three layers of materials in a cylindrical battery cell is wound into a cylindrical electrode assembly, while a thin film structure in a prismatic battery cell is wound or stacked into an electrode assembly in a substantially cuboid shape.

A plurality of battery cells may be connected in series and/or in parallel via electrode terminals for various applications. In some high-power applications such as electric automobiles, application of a battery includes three levels: a battery cell, a battery module, and a battery pack. The battery module is formed by electrically connecting a certain number of battery cells together and putting them in a frame in order to protect the battery cells from external impact, heat, vibration, or the like. The battery pack is a final state of a battery system installed in an electric automobile. Most existing battery packs are made by assembling various control and protection systems such as a battery management system (BMS) and a thermal management component on one or more battery modules. With the development of technology, the level of battery module may be omitted, that is, a battery pack is directly formed from a battery cell. This improvement allows the battery system to significantly reduce the number of components while increasing weight energy density and volume energy density. The battery mentioned in the present application includes a battery module or a battery pack.

With respect to the battery cell, the main safety hazard comes from the charging and discharging processes, and in order to effectively avoid unnecessary risks and losses, at least triple protection measures are generally taken for the battery cell. Specifically, the protection measures include at least a switching element, a properly selected separator material and a pressure relief mechanism. The switching element refers to an element that can stop the charging or discharging of the battery when the temperature or resistance in the battery cell reaches a certain threshold. The separator is configured to isolate a positive electrode sheet from a negative electrode sheet, and may automatically dissolve micron-sized (or even nanoscale) micropores attached to the separator when the temperature rises to a certain value, so that lithium ions cannot pass through the separator and the internal reaction of the battery cell is terminated.

A pressure relief mechanism refers to an element or component that can be actuated when an internal pressure or internal temperature of a battery cell reaches a predetermined threshold, to relieve the internal pressure and/or internal substances. The pressure relief mechanism may specifically take the form of an anti-explosion valve, a gas valve, a pressure relief valve, a safety valve, or the like, and may specifically adopt a pressure-sensitive or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weakened structure disposed in the pressure relief mechanism is damaged, thereby forming an opening or channel for internal pressure relief. The threshold referred to in the present application may be a pressure threshold or a temperature threshold. The threshold design varies according to different design requirements. For example, the threshold may be designed or determined according to an internal pressure or internal temperature value of a battery cell that is considered to have danger and a risk of being out of control. Moreover, the threshold may, for example depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolytic solution and the separator in the battery cell.

The "actuation" mentioned in the present application means that the pressure relief mechanism acts or is activated to a certain state, so that the internal pressure of the battery cell can be relieved. The action executed by the pressure relief mechanism may include but be not limited to: at least a portion of the pressure relief mechanism being fractured, broken, torn or opened and so on. When the pressure relief mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged outwards from an actuated position as emissions. In this way, the pressure of the battery cell can be relieved under a controllable pressure or temperature, thereby avoiding potential, more serious accidents. The emissions from the battery cell mentioned in the present application include but are not limited to: an electrolytic solution, dissolved or split positive and negative electrode sheets, fragments of a separator, high-temperature and high-pressure gas generated by reaction, flame, or the like. The high-temperature and high-pressure emissions are discharged in a direction in which the pressure relief mechanism of the battery cell is provided, and more specifically, may be discharged in a direction toward a region where the pressure relief mechanism is actuated. The strength and destructive power of such emissions may be very great, and may even be great enough to break through one or more structures such as a cover body in this direction.

In some traditional solutions, the pressure relief mechanism is generally disposed on a cover plate of the battery cell. In some improved technical solutions, the pressure relief mechanism may also be arranged on a housing structure on the battery cell on another side or in another direction. However, regardless of an arrangement manner or arrangement position of the pressure relief mechanism, it is necessary to attach or assemble the battery cell to an attachment component by using the attachment component properly arranged in the battery through an adhesive (also referred to as glue or a binder), where the attachment component may specifically include an attachment component in the battery such as a thermal management component and a support component , and the adhesive may adopt, for example, thermally conductive silica gel, epoxy resin adhesive, polyurethane adhesive, or the like.

It can be understood that the support component referred to in the present application may generally be understood as a component for providing support for the battery cell or resisting the gravity of the battery cell, which can generally be attached for example to a bottom wall or bottom of the housing of the battery cell to support or fix the battery cell thereon. The thermal management component is a component for accommodating a fluid to adjust the temperature of the battery cell, where the fluid here may be liquid or gas, and temperature adjustment refers to heating or cooling or lowering the temperature of the battery cell. Typically, the thermal management component for cooling or lowering the temperature of the battery cell may also be referred to as a cooling component, a cooling system, a cooling plate, or the like, which accommodates a cooling medium such as cooling liquid or cooling gas, where the cooling medium may be designed to flow in a circulating manner to achieve better temperature adjustment effects. The cooling medium may specifically use water, a mixture of water and ethylene glycol, air, or the like. The attachment component generally refers to a part of the battery that is adhered with the battery cell by the adhesive. As mentioned above, the attachment component may be provided by or composed of the thermal management component or the support component, besides, the attachment component may also be provided by any other suitable component in the battery.

Regardless of which part of the battery is used as the attachment component, this manner of assembling the battery cell to the battery using the adhesive generally refers to applying or coating the adhesive on adhesive surfaces on which the attachment component and the battery cell are attached to each other, and then engaging the adhesive surfaces corresponding to the battery cell and the attachment component in a surface adhering manner by using the adhesive force and cohesive force generated after the curing of the adhesive, and thus the purpose of assembling the battery cell to the attachment component may be achieved. This design and its processing manner are widely applied because of its advantages of easy implementation, simple processes, low costs and firm and reliable attachment.

However, after conducting a great deal of research and experiments, the inventor of the present application found that the widely adopted design of attaching the battery cell to the attachment component in the battery by using the adhesive may unexpectedly have an adverse effect on the design of the pressure relief mechanism aimed at providing reliable guarantee for the use safety of the battery cell.

Specifically, on the one hand, when the adhesive is coated, some adhesive may flow into a region related to the actuation of the pressure relief mechanism due to careless coating of an excessive adhesive in a certain region or inclination of the adhesive surface coated with the adhesive. In this case, if the inflow adhesive is not cleaned additionally, this portion of the adhesive after curing is possible to adversely affect the actuation of the pressure relief mechanism, and even block or partially block a channel or opening that is formed when the pressure relief mechanism is actuated for the emissions to flow out, thereby affecting the relief of the emissions.

On the other hand, the pressure relief mechanism in the battery cell is actuated when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the high-temperature and high-pressure substances inside the battery cell are discharged outwards from an actuated position as emissions. At this time, the high-temperature and high-pressure emissions enable, due to its own destructive power and/or high temperature in a relieving process, an adhesive coated on an adhesive surface near a path where emissions pass by to be melted and flow into a region related to the actuation of the pressure relief mechanism, such as a position where the pressure relief mechanism is actuated, or a channel or opening formed by the actuation of the pressure relief mechanism for emissions to flow out, thereby adversely affecting relief of the emissions.

In order to ensure that the pressure relief mechanism may play its designed function to relieve the high-temperature and high-pressure emissions inside the battery cell when necessary, it is necessary to prevent, in a certain manner, the adhesive such as thermally conductive silica gel from being applied to a region that may affect the actuation of the pressure relief mechanism or may affect the pressure relief mechanism to form an opening or channel for the emissions to flow out. However, for this reason, abandonment of the manner of assembling the battery cell to the attachment component in the battery with the adhesive, or addition of a barrier structure around an adhesive surface on which the adhesive needs to be applied to the battery cell or the attachment component will significantly increase the manufacturing difficulty and production costs of the battery. Therefore, how to ensure that the pressure relief mechanism disposed in the battery cell can play its designed function so as to ensure the use safety of the battery, while keeping the manufacturing difficulty and production costs of the battery at a relatively expected low level as much as possible is a difficult technical problem for a researcher or a person skilled in the art to be solved.

In order to solve or at least partially solve the foregoing problems and other potential problems of a battery in the prior art, the inventor of the present application proposes a battery, the design of which will be described in detail below. It can be understood that the battery described in the embodiment of the present application is applicable to various apparatuses using batteries, such as mobile phones, portable devices, notebook computers, electromobiles, electric automobiles, ships, spacecrafts, electric toys and electric tools. For example, the spacecrafts include airplanes, rockets, space shuttles, spaceships, and the like; the electric toys include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys and electric airplane toys; the electric tools include electric metal cutting tools, electric grinding tools, electric assembling tools and electric railway tools, such as electric drills, electric grinders, electric spanners, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers.

The battery described in an embodiment of the present application is not only applicable to the device described above, but also applicable to all devices using batteries. However, the following embodiments are all described by an example of an electric automobile for brevity.

For example, as shown in <FIG> is a simplified schematic diagram of a vehicle <NUM> according to an embodiment of the present application. The vehicle <NUM> may be a fuel-powered vehicle, a gas-powered vehicle or a new energy vehicle, and the new energy vehicle may be a full electric vehicle, a hybrid vehicle, an extended-range vehicle, or the like. As shown in <FIG>, the vehicle <NUM> may be internally provided with a battery <NUM>, for example, the battery <NUM> may be disposed at the bottom, head or tail of the vehicle <NUM>. The battery <NUM> may be used for power supply to the vehicle <NUM>, for example, the battery <NUM> may be used as an operation power source of the vehicle <NUM>. Moreover, the vehicle <NUM> may further include a controller <NUM> and a motor <NUM>. The controller <NUM> is configured to control the battery <NUM> to supply power to the motor <NUM>, for example, for a working power demand of the vehicle <NUM> during startup, navigation and driving. In another embodiment of the present application, the battery <NUM> may be used not only as an operation power source of the vehicle <NUM>, but also as a driving power source of the vehicle <NUM>, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle <NUM>. The battery <NUM> referred to below may also be understood as a battery pack including a plurality of battery cells <NUM>.

As shown in <FIG>, a battery cell <NUM> includes a case <NUM>, an electrode assembly <NUM> and an electrolytic solution, where the electrode assembly <NUM> is accommodated in the case <NUM> of the battery cell <NUM>, and the electrode assembly <NUM> includes a positive electrode sheet, a negative electrode sheet and a separator. A material of the separator may be polypropylene (PP), polyethylene (PE), or the like. The electrode assembly <NUM> may be a winding structure or a laminated structure. The case <NUM> includes a housing <NUM> and a cover plate <NUM>. The housing <NUM> includes an accommodation chamber 211a formed from a plurality of walls and an opening 211b. The cover plate <NUM> is arranged at the opening 211b to close the accommodation chamber 211a. In addition to the electrode assembly <NUM>, the accommodation chamber 211a also accommodates an electrolytic solution. The positive electrode sheet and the negative electrode sheet in the electrode assembly <NUM> are generally provided with tabs, and the tabs generally include a positive tab and a negative tab.

Specifically, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on a surface of the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer is used as the positive tab. A material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxides, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on a surface of the negative electrode current collector, the negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector not coated with the negative electrode active material layer is used as the negative tab. A material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that no fusing occurs when a large current passes, there are a plurality of positive tabs which are stacked together, and there are a plurality of negative tabs which are stacked together. The tabs are connected to a positive electrode terminal 214a and a negative electrode terminal 214b located outside the battery cell <NUM> through connecting members <NUM>. In the description of the present application, the positive electrode terminal 214a and the negative electrode terminal 214b are also collectively referred to as an electrode terminal <NUM>. For a prismatic battery cell, as shown in <FIG> and <FIG>, the electrode terminal <NUM> may generally be disposed on the cover plate <NUM>.

<FIG> show exploded views of a battery <NUM> according to some embodiments of the present application. As shown in <FIG>, the battery <NUM> may include a box <NUM> for enclosing a plurality of battery cells <NUM>, and the box <NUM> can avoid liquid or other foreign matters to affect the charging or discharging of the battery cells <NUM>, where the plurality of battery cells <NUM> are electrically connected to each other via a bus component <NUM>, and the battery <NUM> may provide a higher voltage after the plurality of battery cells <NUM> are connected in series or in parallel through the bus component <NUM>. The box <NUM> may include a cover body <NUM> and a box shell <NUM>. The cover body <NUM> and the box shell <NUM> may be combined together in a sealing manner to jointly enclose and form an electrical chamber 11a for accommodating the plurality of battery cells <NUM>, and certainly, they may also be combined with each other in an unsealing manner. In some embodiments, a thermal management component <NUM> may constitute a portion of the box <NUM> for accommodating the plurality of battery cells <NUM>. For example, the thermal management component <NUM> may constitute a side portion 112b of the box shell <NUM> of the box <NUM> or constitute a portion of the side portion 112b, or as shown in <FIG>, a thermal management component <NUM> may constitute a bottom portion 112a of the box shell <NUM> of the box <NUM> or constitute a portion of the bottom portion 112a. This design that the thermal management component <NUM> is used to constitute a portion of the box shell <NUM> is helpful to make a structure of the battery <NUM> more compact, improve effective utilization of space, and improve energy density.

In some alternative embodiments, the battery <NUM> may further include a protective member <NUM>, as shown in <FIG> and <FIG>. The protective member <NUM> in the present application refers to a component arranged on a side of the thermal management component <NUM> away from the battery cell <NUM> to provide protection for the thermal management component <NUM> and the battery cell <NUM>. In these embodiments, a collection chamber 11b may be arranged between the protective member <NUM> and the thermal management component <NUM>.

Referring to <FIG>, at least one battery cell <NUM> in the battery <NUM> includes a pressure relief mechanism <NUM>. In some embodiments, each battery cell <NUM> in the battery <NUM> is provided with a pressure relief mechanism <NUM>, or a pressure relief mechanism <NUM> may be disposed on some battery cells <NUM> in the plurality of battery cells <NUM>, which may be more prone to thermal runaway due to their positions in the battery <NUM> or characteristics of the other battery cells <NUM>. The pressure relief mechanism <NUM> is capable of being actuated when an internal pressure or temperature of the battery cell <NUM> reaches a predetermined threshold, to relieve the internal pressure of the battery cell <NUM>.

The battery <NUM> also includes an attachment component adapted to be attached to the battery cell <NUM> by an adhesive, and the attachment component may be, for example, a thermal management component <NUM>, a support component, or the like in the battery <NUM>. In order to avoid the adhesive such as thermally conductive silica gel to be applied between the attachment component and the pressure relief mechanism <NUM>, thereby not preventing or not affecting the pressure relief mechanism <NUM> from being actuated and performing its designed function as described above, that is, a function that the pressure relief mechanism <NUM> is actuated when the internal pressure or temperature of the battery cell <NUM> is relatively large to form a channel or opening for relieving the internal pressure of the battery cell <NUM>, the battery <NUM> may also be provided with an isolation component <NUM>, which is capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism <NUM>. Hereinafter, an embodiment in which the attachment component is the thermal management component <NUM> and the design of the isolation component <NUM> involved therein will be exemplified below. It can be understood that in a case where the attachment component is the support component, a structure or configuration substantially the same as or similar to that of the isolation component <NUM> may be applied.

In <FIG>, an isolation component <NUM> is schematically depicted, and the isolation component <NUM> at least surrounds an actuation region of a pressure relief mechanism <NUM> to prevent an adhesive from entering the actuation region. In this way, it can avoid any hindrance or adverse influence on the execution of the actuation action of the pressure relief mechanism due to the adhesive flowing into the actuation region from any direction.

The isolation component <NUM> adopted in various embodiments of the present application may adopt various possible constructions, so that the foregoing adhesive used for assembling the battery cell <NUM> to the attachment component can be isolated from a space between the attachment component and the pressure relief mechanism <NUM>, or so that the coated adhesive can be isolated from a space that may affect the pressure relief mechanism <NUM> to perform its designed function of pressure relief once the adhesive flows in. As will be seen in the following description of some preferred embodiments, the isolation component <NUM> may be designed to surround a partial region of the pressure relief mechanism <NUM>, where the partial region can form a relief channel relieving the internal pressure of the battery cell <NUM> when the pressure relief mechanism <NUM> is actuated (which may be referred to as an actuation region or a relief region), for the emissions to flow out, or may also be attached to a region on the attachment component such as the thermal management component <NUM> corresponding to the pressure relief mechanism <NUM>, so as to surround a space that is provided by the attachment component and allows the pressure relief mechanism <NUM> to be actuated (e.g., an avoidance structure <NUM> described below), or the like.

In some embodiments, the isolation component <NUM> may be attached to a region on the attachment component such as the thermal management component <NUM> corresponding to the pressure relief mechanism <NUM> before coating the adhesive. It should be noted that any component in the battery that is adhered together with the battery cell <NUM> by the adhesive may be considered as the attachment component or a portion of the attachment component, and these components may use the isolation component <NUM>, that is, the isolation component <NUM> may be attached thereto before the adhesive is coated. In this way, when the adhesive is coated, the isolation component <NUM> can prevent the adhesive from entering a region on the attachment component corresponding to the pressure relief mechanism <NUM>, especially corresponding to a region on the pressure relief mechanism <NUM> for actuation to form a relief channel relieving the internal pressure of the battery cell for the emissions to flow out, thereby ensuring that the pressure relief mechanism <NUM> can be actuated and normally achieve its designed function. In addition, the use of the isolation component <NUM> may also accelerate the coating speed and accuracy of the adhesive without worrying about coating the adhesive to a region related to the actuation of the pressure relief mechanism <NUM>, and save costs of production time.

<FIG> shows a perspective view of an isolation component <NUM> according to some embodiments of the present application, <FIG> shows an exploded view in which the isolation component <NUM> shown in <FIG> and a thermal management component <NUM> as an example of an attachment component are not assembled together, and <FIG> shows a perspective view in which the isolation component <NUM> shown in <FIG> and a thermal management component <NUM> are attached together. According to embodiments shown in <FIG>, an isolation component <NUM> may be attached to an attachment component such as a thermal management component <NUM> before coating the adhesive, so that a special structural feature on the isolation component <NUM> at least corresponds to a pressure relief mechanism <NUM> or an avoidance structure <NUM> disposed on the attachment component, where the avoidance structure <NUM> can provide a space allowing the relief mechanism <NUM> to be actuated. The specific structure and features of the avoidance structure <NUM> involved will be described in detail below.

As shown in <FIG>, according to some preferred embodiments of the present application, the isolation component <NUM> may include a main body <NUM> and a plurality of protrusions <NUM>. The main body <NUM> is adapted to be attached or assembled to an attachment component such as a thermal management component <NUM>. The protrusion <NUM> protrudes outward from a surface of the main body <NUM>, and the protrusion <NUM> is arranged to be aligned with the pressure relief mechanism <NUM> or a relief region of the pressure relief mechanism <NUM> or an avoidance structure <NUM> or an avoidance chamber 134a in some embodiments described below in a protruding direction when the main body <NUM> is attached to the attachment component. Although in the examples shown in <FIG>, the protrusion <NUM> is arranged to be aligned with the avoidance structure <NUM>, in conjunction with <FIG> it is easy to understand that the arrangement of the avoidance structure <NUM> itself corresponds to the pressure relief mechanism <NUM> or both of which are aligned with each other, so the protrusion <NUM> may also be considered to be aligned with the pressure relief mechanism <NUM> or its actuation region (or relief region). Alternatively, in other embodiments not shown, for example, in an example where the battery <NUM> is not provided with the avoidance structure <NUM>, the protrusion <NUM> may also be arranged to be directly aligned with the pressure relief mechanism <NUM> or aligned with its actuation region or relief region.

It can be understood that the main body <NUM> and the protrusion <NUM> included in the isolation component <NUM> described here are not intended to indicate that the isolation component <NUM> must include independent components, and according to the following description of some preferred embodiments, it can be seen that a structure that the main body <NUM> and the protrusion <NUM> integrally form may be more advantageous in many aspects.

In the present application, the main body <NUM> may be understood as a portion of the isolation component <NUM> designed to be easily attached to an attachment component such as a support component or a thermal management component <NUM>, the protrusion <NUM> is designed to protrude from the surface of the main body <NUM>, and an outer peripheral dimension of the protrusion <NUM> is greater than or equal to an outer peripheral dimension of the pressure relief mechanism <NUM> or at least greater than or equal to that of the relief region of the pressure relief mechanism <NUM>. In this way, when coating the adhesive, on the one hand, a gluing machine may be guided to perform a gluing operation according to a predetermined path, and on the other hand, the adhesive may be ensured not to be coated to a position where the pressure relief mechanism <NUM> is located, thus ensuring that the adhesive can be coated to a proper position efficiently and accurately.

Although in the embodiments shown in <FIG>, the isolation component <NUM> is designed to have a long and thin sheet-shaped main body <NUM>, and each main body <NUM> is provided with a row of protrusions <NUM>. It can be understood that the main body <NUM> and the protrusion <NUM> in the present application may have various shapes according to the shape, structure and other factors of the pressure relief mechanism <NUM>. In consideration of the weight energy density or volume energy density of the battery, the main body <NUM> generally has a relatively thin thickness, and therefore the main body <NUM> may generally be thin films or sheets in various shapes. Typically, a wall thickness of the isolation component <NUM> or the main body <NUM> may be between <NUM> and <NUM>. A shape of the protrusion <NUM> may be, for example, oblong, circular, elliptical, square, or the like as shown in the drawings. Moreover, a single main body <NUM> may also be designed to have a single protrusion <NUM>, multiple rows of protrusions <NUM>, or a plurality of protrusions <NUM> arranged in other manners, as long as the arrangement and relative position of the protrusion <NUM> on the surface of the main body <NUM> can adapt to the setting position of the pressure relief mechanism <NUM> of the battery cell <NUM> in the battery.

According to some preferred embodiments, a single isolation component <NUM> may be designed to include one main body <NUM> and a plurality of protrusions <NUM> protruding from a surface of the main body <NUM>, the main body <NUM> is integrally attached to the attachment component of the battery, and in such an attachment case, the plurality of protrusions <NUM> are respectively aligned with pressure relief mechanisms <NUM> (or aligned with relief regions of the pressure relief mechanisms <NUM>) of a plurality of battery cells <NUM> included in the battery <NUM> in one-to-one correspondence, so that each protrusion <NUM> can surround a pressure relief mechanism <NUM> (or at least surround a relief region of the relief mechanism <NUM>) with which it is aligned. Therefore, a process of assembling the isolation component <NUM> to the attachment component of the battery is relatively simple, and meanwhile, the adhesive coated or to be coated can be isolated from the pressure relief mechanisms <NUM> or the relief regions thereof of the plurality of battery cells <NUM> included in the battery in a relatively independent manner by using the plurality of protrusions <NUM>. Moreover, this can also assist an operator to properly complete the coating of the adhesive with higher efficiency when coating the adhesive, so that the operator does not need to carefully coat the adhesive, which helps to reduce assembling costs and production costs of the battery <NUM>.

Based on the foregoing solution, since a single isolation component <NUM> may be designed to have a plurality of protrusions <NUM>, this design is particularly advantageous for a typical battery type in which a plurality of battery cells <NUM> are accommodated in one battery <NUM> and a plurality of battery cells <NUM> therein are respectively provided with pressure relief mechanisms <NUM>, because when the single isolation component <NUM> is assembled in place, the plurality of protrusions <NUM> can play a role in isolating the adhesive for the pressure relief mechanisms <NUM> of the plurality of battery cells <NUM>.

In a battery <NUM> including a plurality of battery cells <NUM>, the battery cells <NUM> may generally be attached to the attachment component of the battery <NUM> in rows. In view of this situation, the isolation component <NUM> including one main body <NUM> and a plurality of protrusions <NUM> protruding from a surface of the main body <NUM> as described above may be adopted. The isolation component <NUM> may be an integrally formed sheet, and when the main body <NUM> of the isolation component <NUM> is attached to the attachment component of the battery <NUM>, the plurality of protrusions <NUM> on the isolation component <NUM> may be respectively aligned with pressure relief mechanisms <NUM> of the plurality of battery cells <NUM> included in the battery in one-to-one correspondence. Alternatively, a plurality of isolation components <NUM> for the plurality of battery cells <NUM> may be integrally formed, where positions of the plurality of isolation components <NUM> arranged in rows respectively correspond to positions of the pressure relief mechanisms <NUM> of the plurality of battery cells <NUM>. In this way, an assembling process of assembling a plurality of battery cells <NUM> to the battery <NUM> is simpler and the assembling efficiency is higher.

According to some embodiments of the present application, as shown in <FIG>, <FIG> and <FIG> mentioned above, an avoidance structure <NUM> may be disposed on an attachment component such as a thermal management component <NUM>, and an avoidance chamber 134a is formed between the avoidance structure <NUM> and the pressure relief mechanism <NUM>, thereby providing a space allowing the pressure relief mechanism <NUM> to be actuated. In these embodiments, arrangements of the isolation component <NUM> and the protrusions <NUM> therein correspond to the arrangement of the avoidance structure <NUM> or the avoidance chamber <NUM> or both of which are aligned.

Specifically, the avoidance chamber 134a may be, for example, a closed cavity formed by joint enclosing of the avoidance structure <NUM> and the pressure relief mechanism <NUM>. In this solution, for the discharge of the emissions from the battery cells <NUM>, an inlet side surface of the avoidance chamber 134a may be opened due to the actuation of the pressure relief mechanism <NUM>, while an outlet side surface opposite to the inlet side surface may be partially damaged and opened due to the high-temperature and high-pressure emissions, thus forming a relief channel for the emissions. According to some other embodiments, the avoidance chamber 134a may be, for example, a non-closed cavity formed by joint enclosing of the avoidance structure <NUM> and the pressure relief mechanism <NUM>, and an outlet side surface of the non-closed cavity may originally have a channel for the emissions flowing out. As indicated by the arrows in the avoidance chamber 134a of <FIG>, the emissions will be discharged outward in a fan-shaped direction.

According to some embodiments, as shown in <FIG>, the thermal management component <NUM> further includes an avoidance bottom wall 134b at a bottom of the avoidance chamber <NUM> and an avoidance side wall 134c surrounding the avoidance chamber 134a. The avoidance bottom wall 134b referred to herein refers to a wall of the avoidance chamber 134a opposite to the pressure relief mechanism <NUM>, and the avoidance side wall 134c is a wall adjacent to the avoidance bottom wall 134b and surrounding the avoidance chamber 134a at a certain angle, where an included angle formed by the avoidance side wall 134c and the avoidance bottom wall 134b may preferably be in a range of <NUM>°-<NUM>°. The thermal management component <NUM> may also be provided with a fluid channel <NUM> for accommodating a fluid, and the fluid may be a cooling medium, so as to lower the temperature of the battery cell <NUM>.

Accordingly, in these embodiments, the plurality of protrusions <NUM> of the isolation component <NUM> may be arranged as shown in <FIG>, where each protrusion <NUM> may respectively surround its aligned avoidance chamber 134a, that is, the protrusion <NUM> is substantively covered and disposed at or beyond an upper peripheral edge of an avoidance side wall 134c of a corresponding avoidance chamber 134a. That is, the protrusion <NUM> of the isolation component <NUM> is substantively covered and disposed on an upper peripheral edge of the corresponding avoidance chamber 134a, thereby isolating the adhesive coated or to be coated from the avoidance structure <NUM> or the avoidance chamber 134a.

The thermal management component <NUM> and the isolation component <NUM> according to the foregoing preferred embodiments are very beneficial to improving the assembling efficiency of the battery. A process of assembling the isolation component <NUM> to the attachment component of the battery is relatively simple, and meanwhile, the adhesive coated or to be coated can be isolated from avoidance chambers 134a corresponding to the pressure relief mechanisms <NUM> of the plurality of the battery cells <NUM> included in the battery in a relatively independent manner by using the plurality of protrusions <NUM>. Thus, the coated adhesive may be prevented from influencing the pressure relief mechanism <NUM> of the battery cell <NUM> to perform its designed function, thereby ensuring the safety use of the battery. Moreover, this can also assist an operator to properly complete the coating of adhesive with higher efficiency when coating the adhesive.

For example, in the embodiments shown in <FIG>, when a single long and thin sheet-shaped main body <NUM> is assembled to the thermal management component <NUM> and is assembled in place, eight protrusions <NUM> on the main body <NUM> are respectively covered and disposed on the aligned eight avoidance structures <NUM> or avoidance chambers 134a, so that the adhesive cannot enter the avoidance chambers 134a. In other words, an isolation operation of pressure relief mechanisms <NUM> of eight or more battery cells <NUM> may be achieved by assembling a single isolation component <NUM> at one time.

It should be understood that the arrangement direction and position of the pressure relief mechanism <NUM> in the battery cell <NUM> are not limited in the present application. In fact, no matter whether the pressure relief mechanism <NUM> is arranged at a lower portion, upper portion or side portion of the battery cell <NUM>, the relevant design of the isolation component <NUM> proposed in the present application may be properly applied, and it plays a beneficial role in ensuring that the pressure relief mechanism <NUM> achieves its designed function to relieve the high-temperature and high-pressure emissions in the battery cell when necessary, thus ensuring the safety use of the battery.

In some embodiments, as shown in <FIG>, the thermal management component <NUM> may be designed to have the following specific configuration. The thermal management component <NUM> may include a first thermally conductive plate <NUM> and a second thermally conductive plate <NUM>. A groove structure corresponding to a fluid channel is formed on the second thermally conductive plate <NUM>, and an avoidance structure <NUM> is formed on the first thermally conductive plate <NUM>. By assembling the first thermally conductive plate <NUM> and the second thermally conductive plate <NUM> together, for example, the first thermally conductive plate <NUM> and the second thermally conductive plate <NUM> may be assembled together by welding (such as brazing), the thermal management component <NUM> as described in the foregoing embodiments may be formed. Certainly, it can be understood that this manner of forming the thermal management component <NUM> by assembling the first thermally conductive plate <NUM> and the second thermally conductive plate <NUM> is only an example, and the foregoing thermal management component <NUM> may also be formed in other appropriate manners.

The flow channel <NUM> disposed in the thermal management component <NUM> may be arranged to at least partially surround the avoidance chamber <NUM>, that is, the avoidance side wall 134c separates the flow channel <NUM> from the avoidance chamber 134a, and a weakened structure which is easy to be damaged by the high-temperature and high-pressure emissions for example may be disposed on the avoidance side wall 134c. It should be understood that the weakened structure referred to in the present application may include, but is not limited to, a portion with reduced thickness, an indentation (e.g., a cross-shaped indentation 134d as shown in <FIG> and <FIG>), a fragile portion made of a fragile material, or a fragile portion made of a material with a lower melting point, or the like.

In this way, when the emissions from the battery cell <NUM> enter the avoidance chamber 134a, the weakened structure on the avoidance side wall 134c is damaged, so that the cooling medium such as cooling liquid in the flow channel <NUM> flows out into the avoidance chamber 134a, and then the cooling liquid is in contact with the high-temperature and high-pressure emissions from the battery cell <NUM>, and absorbs a large amount of heat and is vaporized. In this way, the temperature and intensity of pressure of the high-temperature and high-pressure emissions from the battery cell <NUM> are significantly reduced in a short time, thus protecting other components such as the battery cells <NUM> in the battery <NUM> in which thermally runaway does not occur. Moreover, since the plurality of protrusions <NUM> of the isolation component <NUM> are substantively covered and disposed at or beyond the upper peripheral edge of the avoidance side wall 134c of the corresponding avoidance chamber 134a, this design can make the emissions damage the weakened structure of the avoidance side wall 134c and introduce the cooling medium, and meanwhile, the isolation component <NUM> and the protrusions <NUM> thereof still play a certain role in preventing the adhesive such as thermally conductive silica gel located outside thereof, thus improving the safety of the battery.

The overall construction or configuration of the isolation component <NUM> is introduced above with reference to <FIG>, based mainly on the relative positional relationship between the isolation component <NUM> and another component, such as the attachment component or the pressure relief mechanism <NUM>. Based on this, the isolation component <NUM> may be designed into various possible constructions to achieve the function described above, that is, the adhesive used when the battery cell <NUM> is assembled to the attachment component is isolated from a space between the attachment component and the pressure relief mechanism <NUM>, or the coated adhesive is isolated from a space that may affect the pressure relief mechanism <NUM> to perform its designed function of pressure relief once the adhesive flows in. More specific constructions of the isolation component <NUM> will be mainly described in detail below with reference to <FIG>.

<FIG> shows a perspective view of an isolation component <NUM> according to some embodiments of the present application, <FIG> shows an enlarged view of a part C of the insolation component <NUM> shown in <FIG>, <FIG> shows a sectional view of the insolation component <NUM> shown in <FIG> in a direction of D-D, and <FIG> shows an enlarged view of a part E of a sectional plane of the insolation component <NUM> shown in <FIG>. According to embodiments shown in <FIG>, with the special design of the protrusion <NUM>, the isolation component <NUM> can more effectively prevent an adhesive such as thermally conductive silica gel to isolate it from a space between the attachment component and the pressure relief mechanism <NUM>, so as to ensure that the pressure relief mechanism <NUM> can be actuated and normally achieve its designed function.

As shown in <FIG>, according to some embodiments of the present application, the protrusion <NUM> disposed on the isolation component <NUM> includes a first protrusion <NUM> and a second protrusion <NUM>, where the first protrusion <NUM> and the second protrusion <NUM> protrude from a surface of the main body <NUM> in the same direction. When assembled in place, the isolation component <NUM> is disposed between the battery cell <NUM> and the attachment component. Therefore, specifically, in a case of attaching the main body <NUM> of the isolation component <NUM> to the attachment component, the first protrusion <NUM> and the second protrusion <NUM> are arranged to protrude from the surface of the main body <NUM> in a direction away from the attachment component, that is, to protrude toward the battery cell <NUM>.

The first protrusion <NUM> corresponds to the position of the pressure relief mechanism <NUM>. Specifically, as described above, the first protrusion <NUM> may be arranged to be aligned with the pressure relief mechanism <NUM> or an actuation region (or a relief region) of the pressure relief mechanism <NUM> or the avoidance structure <NUM> or the avoidance chamber 134a in the embodiments described above in a protruding direction when the main body <NUM> is attached to the attachment component. A protruding height of the first protrusion <NUM> is beneficial to preventing the adhesive from entering a space between the pressure relief mechanism <NUM> and the attachment component when the adhesive is applied, so as to avoid the inflow adhesive to hinder the normal operation of the pressure relief mechanism <NUM>.

The second protrusion <NUM> and the first protrusion <NUM> are spaced apart. With reference to <FIG>, the second protrusion <NUM> is arranged to surround the first protrusion <NUM>. Specifically, the second protrusion <NUM> is in an annular structure, and is arranged to surround an outer periphery of the first protrusion <NUM>. A protruding height of the second protrusion <NUM> is also beneficial to preventing the adhesive from entering the space between the pressure relief mechanism <NUM> and the attachment component around the first protrusion <NUM>. Moreover, since the second protrusion <NUM> is arranged around the first protrusion the cooperation of the two in structure has a multiple prevention effect on the adhesive, and thus can intercept the adhesive more effectively and reliably, to preventing the adhesive from entering between the attachment component and the pressure relief mechanism <NUM>, hindering normal actuation of the pressure relief mechanism <NUM> when the internal pressure or temperature of the battery cell <NUM> reaches a threshold, and preventing the adhesive from flowing in to block the relief channel, to block discharge of the emissions relieved from the battery cell, so as to further improve safety performance of the battery <NUM>.

In some embodiments, with reference to <FIG> and <FIG>, a groove <NUM> is formed between the first protrusion <NUM> and the second protrusion <NUM>. The groove <NUM> may accommodate at least part of the adhesive to prevent the adhesive coated or to be coated from being applied between the attachment component and the pressure relief mechanism <NUM>. The groove <NUM> may specifically accommodate part of the adhesive that overflows the second protrusion <NUM>, the adhesive that accidentally drips in the groove <NUM> in the process of attaching the battery cell <NUM> to the attachment component, the adhesive that enters the groove <NUM> due to other reasons, and the like.

The groove <NUM> between the first protrusion <NUM> and the second protrusion <NUM> may accommodate at least part of the adhesive, which is equivalent to adding another barrier for the adhesive. When the second protrusion <NUM> prevents its peripheral adhesive from flowing to the first protrusion <NUM>, if the function of intercepting the adhesive by the second protrusion <NUM> fails, the groove <NUM> may further store a certain amount of adhesive overflowing from the second protrusion <NUM>, thereby preventing the adhesive from further flowing to the space between the pressure relief mechanism <NUM> and the attachment component.

In order to enable the isolation component <NUM> to achieve a better adhesive preventing effect, the structure of the first protrusion <NUM>, the second protrusion <NUM> or the groove <NUM> may be designed accordingly.

In some embodiments, with reference to <FIG>, the second protrusion <NUM> includes a first side wall 1422a, a second side wall 1422b and a connecting wall 1422c for connecting the first side wall 1422a and the second side wall 1422b. In the embodiments of the present application, the first side wall 1422a is connected to the main body <NUM>, the second side wall 1422b is connected to the main body <NUM>, and the first side wall 1422a is arranged to opposite to the second side wall 1422b. The first side wall 1422a is close to the first protrusion <NUM>, and the first side wall 1422a is a wall shared by the second protrusion <NUM> and the groove <NUM>.

In some embodiments, as shown in <FIG>, the first side wall 1422a and the second side wall 1422b are parallel to a direction in which the attachment component faces the battery cell <NUM> when the battery cell <NUM> is attached to the attachment component, that is, the first side wall 1422a and the second side wall 1422b are parallel to a protruding direction of the second protrusion <NUM>. The connecting wall 1422c is perpendicular to the protruding direction of the second protrusion <NUM>. The isolation component <NUM> in this structure has a good effect of preventing the adhesive, it is simpler to process required modules, the processing is easy, and the costs are low.

In some embodiments, with reference to <FIG>, at least one of the first side wall 1422a and the second side wall 1422b includes a first projection <NUM>, and the first projection <NUM> is arranged to protrude in a first direction X, where the first direction X is perpendicular to a protruding direction of the second protrusion <NUM>.

Here, the first direction X is a direction that is located in a D-D sectional plane shown in <FIG> and is perpendicular to the protruding direction of the second protrusion <NUM>. Therefore, the first direction X in the embodiments of the present application should be understood as a direction perpendicular to the protruding direction of the second protrusion <NUM>, such as a direction indicated by an arrow in <FIG>.

Exemplarily, in an example that the first side wall 1422a is provided with a first projection <NUM>, the actual protruding direction of the second protrusion <NUM> is a direction in which the attachment component faces the battery cell <NUM>. For convenience of understanding and description, in an example that a direction of the second protrusion <NUM> upward along a paper surface is the protruding direction, the first direction X is a direction perpendicular to the protruding direction of the second protrusion <NUM>, toward the right along the paper surface for example. Therefore, the first projection <NUM> may protrude in the first direction X indicated by the arrow.

In the embodiments of the present application, since the groove <NUM> and the second protrusion <NUM> share the first side wall 1422a, and the first projection <NUM> is disposed on the first side wall 1422a and protrudes in a direction close to the second side wall 1422b, in this way, while the second protrusion <NUM> meets a requirement of preventing the adhesive, the first projection <NUM> may further increase an accommodating volume of the groove <NUM>, thereby accommodating more adhesive and preventing the adhesive from entering the space between the attach component and the pressure relief mechanism <NUM>.

It should be understood that the first projection <NUM> disposed on the first side wall 1422a may further protrude in a direction opposite to the direction indicated by the arrow in <FIG>, or the first projection <NUM> may be further disposed on the second side wall 1422b, and the first projection <NUM> on the second side wall 1422b may protrude in a direction perpendicular to the protruding direction of the second protrusion <NUM>, for example, protrude in a direction close to or away from the first side wall 1422a, which is not limited in the embodiments of the present application.

In practical applications, the first projection <NUM> may be disposed on the first side wall 1422a and/or the second side wall 1422b according to requirements, so as to achieve one or more of effects of effectively preventing the adhesive, increasing the accommodating volume of the groove <NUM>, reducing the space occupied by the second protrusion <NUM>, facilitating demoulding of the isolation component <NUM> in a producing process, and the like.

In the embodiments of the present application, the first projection <NUM> is formed from at least part of the first side wall 1422a or the second side wall 1422b.

In some embodiments, with reference to <FIG>, at least one of the first side wall 1422a and the second side wall 1422b is arranged obliquely relative to a direction in which the attachment component faces the battery cell <NUM>.

Exemplarily, in an example that the first side wall 1422a and the second side wall 1422b are both arranged obliquely, as shown in <FIG>, one end of the first side wall 1422a connected to the connecting wall 1422c is oblique to a side on which the second side wall 1422b is located, and one end of the second side wall 1422b connected to the connecting wall 1422c is oblique to a side on which the first side wall 1422a is located. The oblique arrangement of the first side wall 1422a may increase the accommodating volume of the groove <NUM> to accommodate more adhesive, thereby effectively preventing the adhesive from entering between the pressure relief mechanism <NUM> and the attachment component. The oblique arrangement of the second side wall 1422b may increase a coating area of the adhesive on a periphery of the second protrusion <NUM> to ensure reliability of adhesion. In addition, the oblique arrangements of the first side wall 1422a and/or the second side wall 1422b facilitate demoulding of the insolation component <NUM> in a producing process.

It should be understood that, in other embodiments, the directions of the oblique arrangements of the first sidewall 1422a and/or the second side wall 1422b may also be in other forms. For example, one end of the first side wall 1422a connected to the connecting wall 1422c is oblique to a side on which the first protrusion is located, and/or one end of the second side wall 1422b connected to the connecting wall 1422c is oblique to a side away from the first side wall 1422a, which is not limited in the embodiments of the present application.

It can be understood that, in practical applications, the first projection <NUM> may be disposed on the first side wall 1422a and/or the second side wall 1422b while the first side wall 1422a and/or the second side wall 1422b are obliquely arranged, which is not limited in the embodiments of the present application.

It should be noted that when whether the first side wall 1422a or the second side wall 1422b is arranged obliquely relative to a direction in which the attachment component faces the battery cell <NUM> is determined, it can be determined according to a spatial relationship between a main plane where the first side wall 1422a or the second side wall 1422b is located and the direction in which the attachment component faces the battery cell <NUM>. In an example of a main plane of the first side wall 1422a, it may be a plane where the first side wall 1422a is located, or a plane where most of the first side wall 1422a is located, or a plane where a flat part on the first side wall 1422a is located, or the like.

In some embodiments, with reference to <FIG>, the connecting wall 1422c includes a second projection <NUM>, the second projection <NUM> is arranged to protrude in a direction in which the attachment component faces the battery cell <NUM>, or arranged to protrude in a direction in which the battery cell <NUM> faces the attachment component. Since the protruding direction of the second protrusion <NUM> is the direction in which the attachment component faces the battery cell <NUM>, the second projection <NUM> may also be understood as being arranged to protrude in the protruding direction of the second protrusion <NUM>, or being arranged to protrude in a direction opposite to the protruding direction of the second protrusion <NUM>.

Exemplarily, as shown in <FIG>, the second projection <NUM> is arranged to protrude in a direction in which the battery cell <NUM> faces the attachment component. The arrangement of the second projection <NUM> makes a surface of the connecting wall 1422c uneven, thereby forming a space that can accommodate the adhesive. In this way, when a height of the adhesive exceeds a height of the second protrusion <NUM> to have a tendency of flowing to the first protrusion <NUM>, the adhesive may first remain in the accommodating space on the surface of the connecting wall 1422c, which is equivalent to adding another barrier, and preventing the adhesive from flowing in a direction of the first protrusion <NUM> continuously. If a width of the second protrusion <NUM> is sufficient, curvature of the surface of the connecting wall 1422c is smaller, and the adhesive that the connecting wall 1422c can store is more.

In the embodiments of the present application, the second projection <NUM> is formed from at least part of the connecting wall 1422c.

It should be understood that the second projection <NUM> may also be arranged to protrude in a direction toward the battery cell <NUM>, which is not limited in the embodiments of the present application. By rationally designing the structure of the second projection <NUM>, the space occupied by the second protrusion <NUM> can be reduced, the accommodating volume of the groove <NUM> can be increased, and the like.

It should also be understood that, in practical applications, while the second projection <NUM> is disposed on the connecting wall 1422c, the first projection <NUM> may be disposed on at least one of the first side wall 1422a and the second side wall 1422b, and/or at least one of the first side wall 1422a and the second side wall 1422b is obliquely arranged, which is not limited in the embodiments of the present application.

In some embodiments, with reference to <FIG>, the second protrusion <NUM> includes a cavity <NUM>. At least one of the first side wall 1422a, the second side wall 1422b and the connecting wall 1422c is provided with an opening <NUM>. The opening <NUM> is in communication with the cavity <NUM>, so that at least part of the adhesive enters the cavity <NUM> through the opening <NUM>.

In the embodiments of the present application, by providing the opening <NUM> on at least one wall of the second protrusion <NUM>, the adhesive located around the second protrusion <NUM> can enter the cavity <NUM> through the opening <NUM>, which not only makes full use of the space occupied by the second protrusion <NUM>, but also may reduce the adhesive around the second protrusion <NUM> to prevent the adhesive from entering the space between the attachment component and the pressure relief mechanism <NUM>.

In the solution of disposing the opening <NUM> on at least one wall of the second protrusion <NUM>, a shape of the second protrusion <NUM> may be in any one of the structures as shown in the foregoing <FIG> or the following drawings, and the embodiments of the present application do not limit the shape of the second protrusion <NUM>.

In some embodiments, the cavity <NUM> may be a semi-enclosing structure. with reference to <FIG>, the cavity <NUM> may be enclosed by walls of the second protrusion <NUM>, the walls of the second protrusion <NUM> are located on a side of the isolation component <NUM> close to the battery cell <NUM>, and the cavity <NUM> is in communication with the outside on a side of the isolation component <NUM> close to the attachment component, to form a semi-closed chamber. In a case that the isolation component <NUM> is attached to the attachment component, an opening of the cavity <NUM> in communication with the outside may be blocked by the attachment component.

In some embodiments, the cavity <NUM> may be a fully enclosing structure. With reference to <FIG>, the cavity <NUM> may be enclosed by walls of the second protrusion <NUM> and the main body <NUM>. Exemplarily, the second protrusion <NUM> may be an independent component connected to the main body <NUM>.

It should be understood that, in order to smoothly enter the cavity <NUM> from the opening <NUM> for the adhesive, the opening <NUM> can be opened as large as possible to prevent the adhesive from having excessive resistance or directly blocking the opening <NUM> when entering the cavity. In practical applications, a size of the opening <NUM> may be correspondingly designed according to the structure of the second protrusion <NUM>, a coating thickness of the adhesive, and characteristic parameters of the adhesive, such as bonding strength, viscosity, and gel time.

The structure of the second protrusion <NUM> of the isolation component <NUM> is introduced above in detail, and the first protrusion <NUM> of the isolation component <NUM> will be described below in detail with reference to the drawings. It should be understood that the structures of the first protrusion <NUM> and the second protrusion <NUM> are respectively described in an example of the same drawing in the embodiments of the present application, but this does not limit the isolation component <NUM> to be formed by combining the first protrusion <NUM> and the second protrusion <NUM> shown in the drawings.

In some embodiments, with reference to <FIG>, the first protrusion <NUM> may include a third side wall 1421a and a top wall 1421b. The third side wall 1421a is connected to the main body141, and the third side wall 1421a is arranged opposite to the first side wall 1422a, where the third side wall 1421a is a wall shared by the first protrusion <NUM> and the groove <NUM>. The top wall 1421b is connected to one end of the third side wall 1421a close to the battery cell <NUM>. A plane where the top wall 1421b is located is perpendicular or substantially perpendicular to a protruding direction of the first protrusion <NUM>.

In some embodiments, the third side wall 1421a is parallel to a direction in which the attachment component faces the battery cell <NUM> when the battery cell <NUM> is attached to the attachment component, that is, the third side wall 1421a is parallel to the protruding direction of the first protrusion <NUM> (that is, the protruding direction of the second protrusion <NUM>). The isolation component <NUM> in this structure has a good effect of preventing the adhesive, it is simpler to process required modules, the processing is easy, and the costs are low.

In some embodiments, with reference to <FIG>, the third side wall 1421a may include a third projection <NUM>, and the third projection <NUM> is arranged to protrude in a first direction X, where the first direction X is perpendicular to a protruding direction of the first protrusion <NUM>. In the embodiments of the present application, the protruding direction of the first protrusion <NUM> is the same as the protruding direction of the second protrusion <NUM>, and thus the first direction X here is also perpendicular to the protruding direction of the second protrusion <NUM>.

Exemplarily, as shown in <FIG>, a third projection <NUM> is disposed on the third side wall 1421a, where the third projection <NUM> is arranged to protrude in the first direction X indicated by an arrow. The third side wall 1421a is a wall shared by the first protrusion <NUM> and the groove <NUM>, the third projection <NUM> is disposed on the third side wall 1421a and protrudes in a direction away from the first side wall 1422a, which may increase the accommodating volume of the groove <NUM>, thereby accommodating more adhesive. It should be understood that the third projection <NUM> may also be arranged to protrude in a direction opposite to the direction indicated by the arrow in <FIG>, which is not limited in the embodiments of the present application.

In some embodiments, with reference to <FIG>, the third side wall 1421a is arranged obliquely relative to a direction in which the attachment component faces the battery cell <NUM>. Exemplarily, one end of the third side wall 1421a connected to the top wall 1421b is oblique to a direction away from the second protrusion <NUM>, which may increase the accommodating volume of the groove <NUM> to accommodate more adhesive, thereby effectively preventing the adhesive from entering between the pressure relief mechanism <NUM> and the attachment component. Moreover, the way to obliquely arranging the third side wall 1421a is beneficial to demoulding of the isolation component <NUM> in a producing process.

It should be understood that, in some other embodiments, the direction of the oblique arrangement of the third sidewall 1421a may also be in other forms. For example, one end of the third side wall 1421a connected to the top wall 1421b is oblique to a side on which the second protrusion <NUM> is located, which is not limited in the embodiments of the present application. In addition, a third projection <NUM> may be disposed on the third side wall 1421a while the third side wall <NUM> is obliquely arranged. In practical applications, the structures of the first protrusion <NUM> shown in <FIG> and described in the related description may be combined with the structures of the second protrusion <NUM> shown in <FIG> and described in the related description arbitrarily, which is not limited in the embodiments of the present application thereto.

Similarly, in some embodiments, an opening may also be disposed on the third side wall 1421a, so that the adhesive in the groove <NUM> passes through the isolation component <NUM> through the opening, and enters between the isolation component <NUM> and the attachment component.

In the embodiments of the present application, the groove <NUM> is formed from the third side wall 1421a of the first protrusion <NUM>, the first side wall 1422a of the second protrusion <NUM>, and the main body <NUM>. Therefore, by properly designing the structures of the first side wall 1422a, the third side wall 1421a and the main body <NUM>, the groove <NUM> in a specific structure can be realized to achieve the purpose of increasing the volume of the groove <NUM> for accommodating the adhesive.

In some embodiments, a width of the second protrusion <NUM> may be <NUM> to <NUM>.

It should be noted that the width of the second protrusion <NUM> involved here can be understood as a range of the width of the second protrusion <NUM>. For the second protrusion <NUM> with equal width, the width is uniform, and the uniform width should be greater than <NUM> and less than <NUM>. For the second protrusion <NUM> with unequal width, the maximum width and the minimum width should be in a range from <NUM> to <NUM>.

It should also be noted that the width of the second protrusion <NUM> refers to a width of the second protrusion in the first direction X, and the first direction X is perpendicular to the protruding direction of the second protrusion <NUM>.

Exemplarily, a sectional shape of the second protrusion <NUM> is any one of the following shapes: a Ω shape, a convex lens type, a concave lens type, a trapezoid shape, an arch shape, and the like.

In some embodiments, a width of the groove <NUM> is <NUM> to <NUM>. The meaning of the width of the groove <NUM> is similar to the meaning of the width of the second protrusion <NUM>, which will not be repeated redundantly herein.

Exemplarily, a sectional shape of the groove <NUM> is any one of the following shapes: a drum type, a bag type, a bowl type, a trapezoid shape, a rectangle shape, and the like.

In some embodiments, the first protrusion <NUM> and the second protrusion <NUM> may be formed on the surface of the main body <NUM> by a blister process. For example, the first protrusion <NUM> and the second protrusion <NUM> are processed and formed on a piece of thin sheet or film made of a thermoplastic material by a blister process on the basis of the piece of thin sheet or film, so as to produce the isolation component <NUM>. This helps to simplify a manufacturing process of the isolation component <NUM> and reduce the costs.

In some embodiments, the first protrusion <NUM> and/or the second protrusion <NUM> may be independent components connected to the main body <NUM>. For example, the first protrusion <NUM> and/or the second protrusion <NUM> are attached to the main body <NUM> after being produced, so as to produce the isolation component <NUM>. This helps to reduce the costs of molds when a more complicated first protrusion <NUM> and/or second protrusion <NUM> are produced.

In some embodiments, as shown in <FIG>, the second protrusion <NUM> may be an elastic component attached to the surface of the main body <NUM>. The elastic component has a certain elastic deformation ability, and serves as the second protrusion <NUM> to prevent the adhesive, which can adapt to larger installation errors. The elastic component may be, for example, a rubber pad, a silicone pad, foam, or the like.

In some embodiments, if the elastic component adopts a loose structure, a loose hole inside the elastic component may be used to accommodate part of the adhesive. Certainly, if the structure of the elastic component is relatively compact, a channel may be disposed on the elastic component, and part of the adhesive is accommodated using the channel. It can be understood that, even if the second protrusion <NUM> is made of a non-elastic component, a channel for accommodating the adhesive may also be disposed in the second protrusion <NUM>, which is not limited in the embodiments of the present application.

It should be noted that, no matter whether the second protrusion <NUM> is made of an elastic component or another material, the structural designs related to the second protrusion <NUM> described in <FIG> are also applicable to this.

In some embodiments, a height of the first protrusion <NUM> is greater than or equal to a predetermined application height of the adhesive, and the first protrusion <NUM> is configured to be compressed when the battery cell <NUM> is attached to the attachment component, to have a height consistent with that of the adhesive; and/or a height of the second protrusion <NUM> is greater than or equal to a predetermined application height of the adhesive, and the second protrusion <NUM> is configured to be compressed when the battery cell <NUM> is attached to the attachment component, to have a height consistent with that of the adhesive.

This arrangement ensures that the first protrusion <NUM> and the second protrusion <NUM> can effectively prevent the adhesive from being applied between the attachment component and the pressure relief mechanism <NUM>. Meanwhile, this enables the isolation component <NUM> not to affect reliable adhesion between the attachment component and the pressure relief mechanism <NUM>, and actuation of the pressure relief mechanism <NUM>. Moreover, when the battery cell <NUM> and the attachment component of the battery <NUM> are glued and pressed or engaged by the adhesive coated on adhesive surfaces, the first protrusion <NUM> and the second protrusion <NUM> may be compressed to a height consistent with that of the adhesive, so that no gap is left between adhesive surfaces of the battery cell <NUM> and the attachment component of the battery <NUM> by the first protrusion <NUM> and the second protrusion <NUM>, thus reliably ensuring that the adhesive is isolated from a region where the pressure relief mechanism <NUM> is actuated and where a channel for the emissions is formed.

In some embodiments, a height of the second protrusion <NUM> is equal to a height of the first protrusion <NUM>. In this way, no gap is left between adhesive surfaces of the battery cell <NUM> and the attachment component of the battery <NUM> by the first protrusion <NUM> and the second protrusion <NUM>, thus reliably ensuring that the adhesive is isolated from a region where the pressure relief mechanism <NUM> is actuated and where a channel for the emissions is formed.

In some embodiments, the protrusion <NUM> further includes a plurality of annular protrusions arranged to surround the second protrusion <NUM>, and the plurality of annular protrusions surround it in sequence and spaced apart from each other. Exemplarily, with reference to <FIG>, the protrusion <NUM> further includes a third protrusion <NUM>, and the third protrusion <NUM> is arranged around the second protrusion <NUM>. The structural design of the third protrusion <NUM> is similar to that of the second protrusion <NUM>. Reference may be made to the above related description of the second protrusion <NUM> for details, which will not be repeated redundantly herein for brevity.

In some embodiments, a groove <NUM> is formed between the second protrusion <NUM> and the third protrusion <NUM>. The groove <NUM> is formed from one side wall (that is, the second side wall 1422b) of the second protrusion <NUM>, one side wall of the third protrusion <NUM> and the main body <NUM>. The function of the groove <NUM> is similar to that of the groove <NUM> for accommodating at least part of the adhesive. It should be understood that more protrusions may further be arranged on an outer periphery of the third protrusion <NUM>, the number of protrusions is greater, and the effect of preventing the adhesive is better. In addition, more grooves may further be disposed between the protrusions, the number of grooves is greater, and the effect of preventing the adhesive is better.

In order to prevent the adhesive from passing over the above protrusion <NUM> (such as the first protrusion <NUM>, the second protrusion <NUM> and the third protrusion <NUM>) that prevents the adhesive to enter between the pressure relief mechanism <NUM> and the isolation component <NUM> and adhere to the pressure relief mechanism <NUM> to affect the smooth opening of the pressure relief mechanism <NUM>, on the basis of the structure provided above, an embodiment of the present application further provides another isolation component <NUM>.

<FIG> shows a perspective view of an isolation component <NUM> according to some embodiments of the present application, <FIG> shows an enlarged view of a part F of the insolation component <NUM> shown in <FIG>, <FIG> shows a sectional view of the insolation component <NUM> shown in <FIG> in a direction of G-G, and <FIG> shows an enlarged view of a part H of a sectional plane of the insolation component <NUM> shown in <FIG>. According to embodiments shown in <FIG>, with the special design of the protrusion <NUM>, the isolation component <NUM> can prevent the adhesive from adhering to the pressure relief mechanism <NUM>, so as to ensure that the pressure relief mechanism <NUM> can be actuated smoothly.

As shown in <FIG>, according to some embodiments of the present application, a through hole <NUM> is disposed on a wall of the protrusion <NUM> facing the pressure relief mechanism <NUM>, and the through hole <NUM> is configured such that emissions from the battery cell <NUM> pass through the isolation component <NUM> when the pressure relief mechanism <NUM> is actuated. In the embodiments of the present application, the protrusion <NUM> may be the protrusion <NUM> described in <FIG>, or the protrusion described in <FIG>.

Exemplarily, with reference to <FIG>, description is made here by an example that the protrusion <NUM> includes a first protrusion <NUM> and a second protrusion <NUM>. The first protrusion <NUM> includes a third side wall 1421a and a top wall 1421b, where the top wall 1421b is a wall facing the pressure relief mechanism <NUM>. In the embodiments of the present application, a through hole <NUM> is disposed on a wall of the first protrusion <NUM> facing the pressure relief mechanism <NUM>, that is, the top wall 1421b. The through hole <NUM> is configured such that the emissions from the battery cell <NUM> pass through the isolation component <NUM> when the pressure relief mechanism <NUM> is actuated.

In the embodiments of the present application, the through hole <NUM> disposed on the top wall 1421b of the first protrusion <NUM> can not only provide a space for actuation of the pressure relief mechanism <NUM>, but also form a channel for the emissions. Moreover, the through hole can allow the adhesive to enter the through hole <NUM> when the prevention functions of the first protrusion <NUM>, the groove <NUM> and the second protrusion <NUM> all fail, to avoid the adhesive to adhere to the pressure relief mechanism <NUM> to affect the smooth opening of the pressure relief mechanism <NUM>.

In some embodiments, with reference to <FIG>, the first protrusion <NUM> may include only a third side wall 1421a, where one end of the third side wall 1421a close to the battery cell <NUM> constitutes an edge of the through hole <NUM>.

In some embodiments, the through hole <NUM> is arranged around the pressure relief mechanism <NUM> to prevent the adhesive from entering between the pressure relief mechanism <NUM> and the attachment component, and avoid the pressure relief mechanism <NUM> to be adhered and unable to be actuated normally.

In some embodiments, when the attachment component is provided with an avoidance chamber 134a, the through hole <NUM> is configured to correspond to a position of the avoidance chamber 134a, and the through hole <NUM> surrounds a peripheral edge of a side of the avoidance chamber 134a facing the pressure relief mechanism <NUM> to avoid the pressure relief mechanism <NUM> to be adhered and unable to be actuated normally.

In some embodiments, the through hole <NUM> is configured to correspond to a position of an actuation region of the pressure relief mechanism <NUM>, and the through hole <NUM> is arranged around the actuation region to prevent the adhesive from entering between the actuation region and the attachment component, and avoid the pressure relief mechanism <NUM> to be adhered and unable to be actuated normally.

In the embodiments of the pressure application, a single isolation component <NUM> may be designed to include one main body <NUM> and one or more protrusions <NUM> protruding from a surface of the main body <NUM>. The battery <NUM> may include a plurality of battery cells <NUM>, and each of the plurality of battery cells <NUM> includes the pressure relief mechanism <NUM>. Manners of positional correspondence between the protrusion <NUM> and the pressure relief mechanism <NUM> (or the actuation region of the pressure relief mechanism <NUM>, or an avoidance chamber 134a, or an avoidance structure <NUM>) will be described below in detail with reference <FIG>. It should be understood that the approximate position of the pressure relief mechanism <NUM> is schematically shown with a frame with dashed lines in the drawings, which should not be construed as a limitation on the present application.

In some embodiments, as shown in <FIG>, a protrusion <NUM> may be in one-to-one correspondence to a pressure relief mechanism <NUM>. The protrusion <NUM> here may be any one of the protrusions <NUM> described in <FIG>.

In some embodiments, as shown in <FIG>, a protrusion <NUM> may correspond to at least two pressure relief mechanisms <NUM>. The protrusion <NUM> here may be any one of the protrusions <NUM> described in <FIG>.

In the embodiments of the present application, when the protrusion <NUM> is the protrusion described in <FIG>, the protrusion <NUM> includes the first protrusion <NUM> and the second protrusion <NUM>. In some embodiments, the first protrusion <NUM> and the second protrusion <NUM> may be in one-to-one correspondence as shown in <FIG>. In some other embodiments, the second protrusion <NUM> may correspond to at least two first protrusions <NUM> as shown in <FIG>.

In this way, the protrusion <NUM> is in one-to-one correspondence to the pressure relief mechanism <NUM> or the protrusion <NUM> corresponds to at least two pressure relief mechanisms <NUM> mentioned above, both of which are understood as that the first protrusion <NUM> is in one-to-one correspondence to the pressure relief mechanism <NUM>, or the first protrusion <NUM> corresponds to at least two pressure relief mechanisms <NUM>.

Regarding the correspondence between the second protrusion <NUM> and the pressure relief mechanism <NUM>, in some embodiments, as shown in <FIG>, the second protrusion <NUM> is in one-to-one correspondence to the first protrusion <NUM>, and the second protrusion <NUM> is in one-to-one correspondence to the pressure relief mechanism <NUM>. In some embodiments, as shown in <FIG>, the second protrusion <NUM> is in one-to-one correspondence to the first protrusion <NUM>, and the second protrusion <NUM> corresponds to at least two pressure relief mechanisms <NUM>. In some embodiments, as shown in <FIG>, the second protrusion <NUM> corresponds to at least two first protrusions <NUM>, and the second protrusion <NUM> corresponds to at least two pressure relief mechanisms <NUM>.

When the second protrusion <NUM> corresponds to a plurality of first protrusions <NUM> (or a plurality of pressure relief mechanisms <NUM>), the second protrusion <NUM> is configured to prevent the adhesive for the plurality of first protrusions <NUM>. In this way, when coating the adhesive, on the one hand, a gluing machine may be guided to perform a gluing operation according to a predetermined path, and on the other hand, the adhesive may be ensured not to be coated to a region within the range of the second protrusion <NUM> to prevent the adhere from being coated to a position where the pressure relief mechanism <NUM> is located, thus ensuring that the adhesive can be coated to a proper position efficiently and accurately. In addition, the adhesive coated in the range of the second protrusion <NUM> is reduced during the adhesive coating process, which can reduce the adhesive that may be applied to the first protrusion <NUM>, thereby preventing the adhesive from entering between the pressure relief mechanism <NUM> and the attachment component.

According to some preferred embodiments of the present application, the isolation component <NUM> and the protrusion <NUM> therein may adopt one or more of the following specific designs, materials or preparation processes, and the isolation component <NUM> according to the following preferred examples may be applied to any of the foregoing embodiments of the present application in principle.

In some preferred embodiments, a height of the protrusion <NUM> in the isolation component <NUM> may be greater than or equal to a predetermined application height of the adhesive, which ensures that the adhesive will not enter or a small amount of adhesive enters a region between the pressure relief mechanism <NUM> and the attachment component when the adhesive is applied, and it is especially advantageous when the avoidance structure 134c is disposed in the attachment component. In addition, the protrusion <NUM> is also configured to be capable of being compressed when the battery cell <NUM> is attached to the attachment component, to have a height consistent with that of the adhesive, thereby ensuring the connection between the attachment component and the battery cell <NUM>. Typically, the protrusion <NUM> may have a height slightly greater than the predetermined application height of the adhesive before the battery cell <NUM> is attached to the attachment component of the battery. When the battery cell <NUM> and the attachment component of the battery are glued and pressed or engaged by the adhesive coated on adhesive surfaces, with adhesive surfaces of the battery cell <NUM> and the attachment component of the battery that are substantially parallel to each other, the protrusion <NUM> may be compressed to a height consistent with the adhesive by simply pressing. At this time, no gap is left between the adhesive surfaces of the battery cell <NUM> and the attachment component of the battery by the protrusion <NUM>, thereby ensuring that the adhesive is isolated from a region where the pressure relief mechanism <NUM> is actuated and where channel for the emissions is formed.

In some preferred embodiments of the present application, the isolation component <NUM> may be made of a thermoplastic material by a blister process. This helps to simplify a manufacturing process of the isolation component <NUM> and reduce the costs. Moreover, for the isolation component <NUM> including the main body <NUM> and the plurality of protrusions <NUM>, it is particularly economical to produce such an isolation component <NUM> by using the thermoplastic material through the blister process. For example, the plurality of protrusions <NUM> may be processed and formed on a piece of thin sheet or film made of the thermoplastic material by the blister process on the basis of the piece of thin sheet or film, so as to produce the isolation component <NUM>.

In some embodiments, the isolation component <NUM> is also made of a material which is easily damaged by the emissions from the battery cell <NUM>, so that the emissions can easily break through the isolation component <NUM>. Alternatively, the protrusion <NUM> or the whole isolation component <NUM> may be made of materials or structures which are easily damaged by high-temperature and high-pressure emissions or have low penetration strength. According to some preferred embodiments, the protrusion <NUM> or the whole isolation component <NUM> may be made of a thermoplastic material with a melting point not higher than a discharge temperature of the emissions, so that the isolation component <NUM> has relatively high structural strength in a general use state where thermally runaway does not occur in the battery cell <NUM>, and can be reliably damaged by the high-temperature and high-pressure emissions in a relatively short time in an emergency case where thermally runaway occurs in the battery cell <NUM>.

It can be understood that, expect that the isolation component <NUM> may adopt the structure including the main body <NUM> and the protrusion <NUM> protruding from the surface of the main body <NUM>, according to some other embodiments, the isolation component <NUM> may also adopt a structure without the protrusion <NUM>, but a special coating layer such as an adhesive-repellent layer, for preventing the adhesive from being applied between the attachment component and the pressure relief mechanism <NUM> is disposed at a position corresponding to the protrusion <NUM> in the foregoing embodiments. In other words, in these embodiments, a region coated with the adhesive-repellent layer covers at least a peripheral edge of a side of each avoidance chamber 134a facing the corresponding pressure relief mechanism <NUM>, or at least covers the actuation region or the relief region of the pressure relief mechanism <NUM>.

Certainly, according to some other embodiments, on the basis of the isolation component <NUM> including the main body <NUM> and the protrusion <NUM> protruding from the surface of the main body <NUM>, an adhesive-repellent layer may be further disposed on the surface of the protrusion <NUM>, so as to more reliably isolate the adhesive from the actuation region where the pressure relief mechanism <NUM> is actuated and where a channel for the emissions is formed or isolate the adhesive from the avoidance chamber 134a.

The battery according to the embodiments of the present application is described above with reference to <FIG>, and a method and device for producing a battery according to embodiments of the present application will be described below with reference to <FIG>. For the parts that are not described in detail, reference is made to the foregoing embodiments.

Specifically, <FIG> shows a schematic flowchart of a method <NUM> for producing a battery according to an embodiment of the present application. As shown in <FIG>, the method <NUM> includes: <NUM>, providing a plurality of battery cells, at least one battery cell of the plurality of battery cells including a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; <NUM>, providing an attachment component adapted to be attached to the battery cell by an adhesive; <NUM>, providing an isolation component configured to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism; and <NUM>, applying the adhesive to attach the battery cell to the attachment component.

By providing the isolation component, it is possible to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism in an effective manner in a process of battery production. Meanwhile, application efficiency and accuracy of the adhesive could be improved, thereby improving production efficiency of the battery.

In some embodiments, the pressure relief mechanism has an actuation region, and the pressure relief mechanism is configured, when the internal pressure or temperature of the battery cell reaches the threshold, to be capable of forming a relief channel for relieving the internal pressure in the actuation region; and the isolation component has a main body and a protrusion arranged to protrude from a surface of the main body, the protrusion is arranged to correspond to a position of the actuation region of the pressure relief mechanism, and the protrusion is configured to at least surround the actuation region to prevent the adhesive from entering the actuation region.

In some embodiments, the attachment component includes an avoidance structure configured to provide a space allowing the pressure relief mechanism to be actuated, and an avoidance chamber is formed between the avoidance structure and the pressure relief mechanism; and the isolation component has a main body and a protrusion arranged to protrude from a surface of the main body, the protrusion is arranged to correspond to a position of the avoidance chamber, and the protrusion is configured to at least surround a peripheral edge of a side of the avoidance chamber facing the pressure relief mechanism to prevent the adhesive from entering the avoidance chamber.

Based on the foregoing embodiments, it is possible to prevent the adhesive from being applied to a surface of the pressure relief mechanism or an avoidance chamber in a simple and effective manner in a process of battery production, thereby avoiding the adhesive from hindering the pressure relief mechanism when it is actuated. Moreover, an isolation component may be flexibly processed and manufactured according to actual needs, so that the manufactured single isolation component can achieve the effect of isolating the adhesive with a plurality of protrusions respectively corresponding to actuation regions of a plurality of pressure relief mechanisms or respectively corresponding to a plurality of avoidance chambers, which is helpful for reducing the production costs.

In some preferred embodiments, the providing the isolation component includes forming the protrusion on the surface of the main body by a blister process. By adopting the blister process, the required isolation component may be processed and manufactured conveniently and at a low cost. For the manufacture of a single isolation component provided with a plurality of protrusions, this processing and manufacturing advantage is particularly remarkable.

<FIG> shows a schematic block diagram of a device <NUM> for producing a battery according to an embodiment of the present application. As shown in <FIG>, the device <NUM> according to some embodiments of the present application includes: a battery cell production module <NUM> for producing a plurality of battery cells, at least one battery cell of the plurality of battery cells including: a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; an attachment component production module <NUM> for producing an attachment component adapted to be attached to the battery cell by an adhesive; an isolation component production module <NUM> for producing an isolation component configured to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism; and an assembling module <NUM> for mounting and fixing the isolation component relative to the battery cell or the attachment component, and applying the adhesive to attach the battery cell to the attachment component.

Claim 1:
A battery (<NUM>), comprising:
a battery cell (<NUM>), comprising: a pressure relief mechanism (<NUM>) configured to be actuated when an internal pressure or temperature of the battery cell (<NUM>) reaches a threshold, to relieve the internal pressure;
an attachment component, configured to support the battery cell (<NUM>) or adjust a temperature of the battery cell (<NUM>);
an adhesive, configured to attach the attachment component to the battery cell (<NUM>); and
an isolation component (<NUM>) configured to be attached to the attachment component to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism (<NUM>);
wherein the pressure relief mechanism (<NUM>) has an actuation region, and the pressure relief mechanism (<NUM>) is configured, when the internal pressure or temperature of the battery cell (<NUM>) reaches the threshold, to form a relief channel for relieving the internal pressure in the actuation region;
the isolation component (<NUM>) has a main body (<NUM>) and a protrusion (<NUM>) arranged to protrude from a surface of the main body (<NUM>), the protrusion (<NUM>) is arranged to correspond to a position of the actuation region of the pressure relief mechanism (<NUM>), and the protrusion (<NUM>) is configured to at least surround the actuation region to prevent the adhesive from entering the actuation region.