Patent Description:
In related art, a mounting base of an output electrode of a battery is generally mounted on an end plate of the battery. In this way, the mounting base of the output electrode will occupy a certain internal space of the battery, thereby affecting the energy density of the battery.

<CIT> provides a battery module and a power battery. In the battery module, a heat insulation block is arranged between a flexible connection and a battery cell, so that heat on the flexible connection can be isolated out of the battery cell. In a working process of the battery module, when the temperature is high due to the current flowing on the flexible connection, the heat on the flexible connection can be isolated out of the battery cell.

<CIT> provides a battery pack including a plurality of battery cells, each battery cell having a positive electrode and a negative electrode on a top surface of the battery cell, the battery cells being arranged in a first direction and in a second direction crossing the first direction; a protective circuit module, the protective circuit module including a printed circuit board on the battery cells, and a plurality of conductive tabs on the printed circuit board and electrically connecting the battery cells; and a case accommodating the battery cells and the protective circuit module, wherein each of the conductive tabs include a substrate connector connected to the printed circuit board, a cell connector electrically connected to a battery cell, and a fusible link extending from the substrate connector and having a width that is smaller than that of the substrate connector.

To describe the technical solutions in the embodiments of the present application more clearly, the following briefly describes the accompanying drawings required for describing the embodiments. It should be understood that the following accompanying drawings show merely some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. A person of ordinary skill in the art may still derive other related drawings from these accompanying drawings without creative efforts.

In the accompanying drawings, the accompanying drawings are not drawn according to an actual ratio.

Reference numerals: <NUM>-battery; <NUM>-battery module; <NUM>-battery cell; <NUM>-shell; <NUM>-cover plate; <NUM>-electrode terminal; <NUM>-box body; <NUM>-first part; <NUM>-second part; <NUM>-mounting base; <NUM>-substrate; <NUM>-limiting surface; 1311a-hole; <NUM>-limiting portion; <NUM>-through hole; <NUM>-avoiding portion; <NUM>-connecting piece; <NUM>-supporting arm; <NUM>-clamping groove; <NUM>-bracket; <NUM>-output electrode; <NUM>-isolating piece; <NUM>-heating film; <NUM>-first avoiding hole; <NUM>-second avoiding hole; <NUM>-outer cover; <NUM>-motor; <NUM>-controller; <NUM>-vehicle.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described below clearly and completely with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some rather than all of the embodiments. Generally, components of the embodiments of the present application described and shown in the accompanying drawings may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present application in the accompanying drawings is not intended to limit the protection scope of the present application, but merely represent selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts should fall within the protection scope of the present application.

It should be noted that the embodiments in the present application and features in the embodiments may be combined with each other in a non-conflicting situation. It should be noted that similar reference numerals and letters represent similar items in the accompanying drawings below. Therefore, once an item is defined in one drawing, it does not need to be further defined and described in subsequent drawings.

In the description of the embodiments of the present application, it should be noted that the orientation or position relationship is an orientation or position relationship shown in the drawings, or an orientation or position relationship that a product of the present application is usually placed during use, or an orientation or position relationship that is usually understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the referred devices or elements must have a specific orientation and be configured and operated in a specific orientation, so it cannot be understood as a limitation to the present application. In addition, the terms such as "first", "second", and "third" are used only for the purpose of description and cannot be understood to indicate or imply relative importance.

In the description of the present application, it should also be noted that unless otherwise specified and limited, the terms "set", "mount", "connect" and "connection" should be understood in a broad sense. For example, they may be fixed connection, detachable connection or integrated connection, may be mechanical connection or electric connection, may be direct connection, may also be indirect connection implemented by an intermediate medium, and may be internal communication of two elements. A person of ordinary skill in the art may understand specific meanings of the above-mentioned terms in the present application based on the specific situation.

"A plurality of" in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups).

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery. The embodiments of the present application are not limited to this.

The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery pack includes one or more battery modules, and the battery module includes one or more battery cells. The battery generally further includes a box body for packaging one or more battery cells. The box body may prevent liquid or other foreign matters from affecting charging or discharging of the battery cell.

The battery cell includes an electrode assembly (not shown in the figure) and electrolyte (not shown in the figure, where the electrode assembly consists of a positive plate (not shown in the figure), a negative plate (not shown in the figure) and an isolating membrane (not shown in the figure). The battery cell mainly relies on the movement of metal ions between the positive plate and the negative plate to work. The positive plate includes a positive current collector and a positive active substance layer, where the positive active substance layer is coated on a surface of the positive current collector, the positive current collector uncoated with the positive active substance layer is protruded out of the positive current collector coated with the positive active substance layer, and the positive current collector uncoated with the positive active substance layer serves as a positive tab. Taking a lithium ion battery as an example, a material of the positive current collector may be aluminum, and the positive active substance may be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate. The negative plate includes a negative current collector and a negative active substance layer, where the negative active substance layer is coated on a surface of the negative current collector, the negative current collector uncoated with the negative active substance layer is protruded out of the negative current collector coated with the negative active substance layer, and the negative current collector uncoated with the negative active substance layer serves as a negative tab. A material of the negative current collector may be copper, and the negative active substance may be carbon or silicon. To guarantee that no fusing occurs while a large current passes through, there are a plurality of positive tabs stacked together, and there are a plurality of negative tabs stacked together. A material of the isolating membrane may be PP (polypropylene) or PE (polyethylene), and the like. In addition, the electrode assembly may be of a winding structure, or may also be of a laminated structure. The embodiments of the present application are not limited to this.

The battery further includes a confluence part, and the confluence part is used to realize electric connection between a plurality of battery cells, for example, the plurality of battery cells are connected in parallel or in series or in a mixed manner, where the mixed manner refers to connection in series and in parallel. Specifically, the confluence part may realize electric connection between the plurality of battery cells by connecting electrode terminals of the plurality of battery cells. Among them, the confluence part used to export electric energy of the plurality of battery cells is called an output electrode. The electric energy of the plurality of batter cells may further be led out by a conductive mechanism.

In related art, the battery module generally includes two end plates, and the two end plates are used to tightly press the plurality of battery cells. The output electrode generally needs to be mounted on the mounting base through a bolt to achieve fixation with the output electrode or the conductive structure of other battery modules. The mounting base is generally mounted at the end plate, so that the end plate bears a twisting force generated when the output electrode is fixed at the mounting base through a bolt, but the mounting base occupies a certain amount of the internal space of the battery, thereby affecting the energy density of the battery.

In view of this, the present application provides a technical solution. The mounting base is mounted at the battery cell without an end plate, which facilitates the mounting, saves parts, reduces the space occupied by the mounting base, and increases the energy density of the battery.

The technical solutions described in the embodiments of the present application are all suitable for various devices using batteries, such as a mobile phone, portable equipment, a notebook computer, an electromobile, an electric toy, an electric tool, an electric vehicle, a ship, spacecraft and the like. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not only suitable for the above devices, but also suitable for all devices using batteries. However, for simple description, the following embodiments are described by taking the electric vehicle as an example.

For example, as shown in <FIG> which is a structural schematic diagram of a vehicle <NUM> in one embodiment of the present application. The vehicle <NUM> may be a fuel vehicle, a gas vehicle or an alternative fuel vehicle, where the alternative fuel vehicle may be a battery electric vehicle, a hybrid electric vehicle or an extended-range vehicle. A battery <NUM> is arranged in the vehicle <NUM>. For example, the battery <NUM> may be arranged at the bottom or head or tail of the vehicle <NUM>. The battery <NUM> may be used to supply power for the vehicle <NUM>. For example, the battery <NUM> may serve as an operating power supply of the vehicle <NUM> and may be applied to a circuit system of the vehicle <NUM>, for example, the battery <NUM> may be applied to the working electricity demand during starting, navigating and operating of the vehicle. In another embodiment of the present application, the battery <NUM> not only may serve as an operating power supply of the vehicle <NUM>, but also may serve as a driving power supply of the vehicle <NUM> to replace or partially replace fuel oil or natural gas to provide driving power for the vehicle <NUM>.

The vehicle <NUM> may also be internally provided with a motor and a controller. The controller is used to control the battery <NUM> to supply power for the motor, for example, for the working electricity demand of the vehicle <NUM> during starting, navigating and driving.

In order to meet different electricity demands, the battery <NUM> may include a plurality of battery cells, where the plurality of battery cells may be connected in series or in parallel or in a mixed manner, and the mixed manner refers to mixing of series and parallel. The battery <NUM> may also be called a battery pack. In some embodiments, a plurality of battery cells may be connected in series or in parallel or in a mixed manner to form a battery module, and a plurality of battery modules are connected in series or in parallel or in a mixed manner to form a battery <NUM>. That is, the plurality of battery cells may directly form the battery <NUM>, or the plurality of battery cells may also form the battery module firstly and then the battery module forms the battery <NUM>.

For example, as shown in <FIG> which is a structural schematic diagram of a battery <NUM> in an embodiment of the present application. The battery <NUM> may include a plurality of battery cells <NUM>, and the plurality of battery cells <NUM> are electrically connected. The battery <NUM> may further include a box body <NUM>, the inside of the box body <NUM> is a hollow structure, and the plurality of battery cells <NUM> are accommodated in the box body <NUM>.

As shown in <FIG>, the box body <NUM> may include two parts, which are respectively called a first part <NUM> and a second part <NUM>, and the first part <NUM> and the second part <NUM> are buckled together. Shapes of the first part <NUM> and the second part <NUM> may be determined by a combined shape of the plurality of battery cells <NUM>, and each of the first part <NUM> and the second part <NUM> may have an opening. For example, each of the first part <NUM> and the second part <NUM> may be a hollow cuboid and has only one surface as an open face, the opening of the first part <NUM> and the opening of the second part <NUM> are arranged oppositely, and the first part <NUM> and the second part <NUM> are buckled with each other to form a box body <NUM> with a closed chamber. The plurality of battery cells <NUM> are mutually combined in parallel or in series or in a mixed manner to be accommodated in the box body <NUM> formed after the first part <NUM> and the second part <NUM> are buckled.

According to different electricity demands, the number of the battery cells <NUM> may be set to any value. The plurality of battery cells <NUM> may be connected in series, in parallel or in a mixed manner to achieve higher capacity and power. As shown in <FIG>, it is an exploded view of a battery module provided by an embodiment of the present application. Since the battery <NUM> may include a relatively large number of battery cells <NUM>, for convenience of mounting, the battery cells <NUM> may be arranged in groups. As shown in <FIG>, each group of battery cells <NUM> form a battery module <NUM>. The number of the battery cells <NUM> included in the battery module <NUM> is not limited and may be set as required. The battery <NUM> may include a plurality of battery modules <NUM>, and these battery modules <NUM> may be connected in series or in parallel or in a mixed manner.

As shown in <FIG>, it is an assembling diagram of a mounting base and a battery cell provided by an embodiment of the present application. The battery cell <NUM> includes one or a plurality of electrode assemblies (not shown in the figure), a shell <NUM> and a cover plate <NUM>. The shell <NUM> and the cover plate <NUM> form an outer shell. A wall of the shell <NUM> and a wall of the cover plate <NUM> are both called a wall body of the battery cell <NUM>. The shell <NUM> is determined according a shape after one or more electrode assemblies are combined. For example, the shell <NUM> may be a hollow cuboid or cube or cylinder; and at least one surface of the shell <NUM> is provided with an opening, so that one or a plurality of electrode assemblies may be placed in the shell <NUM>. For example, when the shell <NUM> is a hollow cuboid or cube, one plane of the shell <NUM> is an open surface, that is, the plane is not provided with a wall body, so that the inside and the outside of the shell communicate with each other; and when the shell <NUM> is a hollow cylinder, an end face of the shell <NUM> is an open surface, that is, the end face is not provided with a wall body, so that the inside and the outside of the shell <NUM> communicate with each other. The cover plate <NUM> covers the opening and is connected to the shell <NUM> to form a closed cavity for placing the electrode assembly. The shell <NUM> is filled with electrolyte, such as dissolved electrolyte.

The battery cell <NUM> may further include two electrode terminals <NUM>, and the two electrode terminals <NUM> may be arranged on the cover plate <NUM>. Generally the cover plate <NUM> is flat plate shaped, the two electrode terminals <NUM> are fixed on the flat plate surface of the cover plate <NUM>, and the two electrode terminals <NUM> are respectively regarded as a positive electrode terminal and a negative electrode terminal. Each electrode terminal <NUM> is correspondingly provided with a connecting component (not shown in the figure), or may also be called a current collecting component, which is located between the cover plate <NUM> and the electrode assembly and used to realize electrically connection of the electrode assembly and the electrode terminal <NUM>.

As shown in <FIG>, the battery <NUM> further includes an output electrode <NUM> and a mounting base <NUM>. The output electrode <NUM> is a part for exporting electric energy of a plurality of battery cells <NUM>. The mounting base <NUM> is configured to be mounted at at least one of the plurality of battery cells <NUM>, for example, the mounting base <NUM> may be mounted at one of the battery cell <NUM>, or the mounting base <NUM> may also be mounted at the plurality of battery cells <NUM>. The mounting base <NUM> is used to fix the output electrode <NUM> of the battery <NUM> so as to ensure the position of the output electrode <NUM> is fixed.

The battery <NUM> may be a battery module. The battery <NUM> may also be a battery pack, the battery pack includes one or a plurality of battery modules <NUM>, and each battery module <NUM> is provided with two output electrodes <NUM>. The two output electrodes <NUM> of the battery module <NUM> are respectively regarded as a positive output electrode and a negative output electrode, the positive output electrode and the negative output electrode may be located on the same side of the battery module <NUM>, or may also be located on two sides of the battery module <NUM> (as shown in <FIG>). Correspondingly, each output electrode <NUM> corresponds to one of the mounting base <NUM>, or one of the mounting base <NUM> may correspond to two output electrodes <NUM>. When the battery <NUM> includes a plurality of battery module <NUM>, the output electrode <NUM> is also used to be electrically connected to the adjacent battery module <NUM>, and the output electrode <NUM> located on the end part of the battery module <NUM> is used to export the electric energy of the battery <NUM>.

According to the battery <NUM> in the embodiment of the present application, the mounting base <NUM> is mounted at the battery cell <NUM>, the battery cell <NUM> supports the mounting base <NUM>, through the battery cell <NUM> to bear a twisting force generated when mounting the output electrode <NUM>. The battery <NUM>, on one hand, facilitates the mounting, saves parts and cost; and on another hand, reduces the space occupied by the mounting base <NUM>, and increases the energy density of the battery <NUM>.

In some embodiments, as shown in <FIG>, the plurality of battery cells <NUM> are fixed integrally through a bracket <NUM> or glue so as to ensure the compact structure of the battery module <NUM>. When the plurality of battery cells <NUM> are assembled in a rectangular array, the structure is compact and the energy density of the battery <NUM> is increased; and the mounting base <NUM> is located on an end part of an array formed by the plurality of battery cells <NUM>, so the structural space is utilized reasonably.

In some embodiments, there are gaps among the plurality of battery cells <NUM>, and the mounting base <NUM> is configured to be insertable into the gaps. It may be understood that after the plurality of battery cells <NUM> are assembled, there is a gap between two adjacent battery cells <NUM>.

In some embodiments, as shown in <FIG> which is an enlarged view of a position A in <FIG>, the battery cell <NUM> is a cylindrical battery cell. After the plurality of battery cells <NUM> are assembled into the battery module <NUM>, due to the contour shape of the cylindrical battery cell, there is a gap between two adjacent battery cells <NUM>. Through the mounting base <NUM> inserting into the gaps among the plurality of battery cells <NUM>, on one hand, the internal space of the battery <NUM> is reasonably utilized, extra space is prevented from being occupied, and the energy density of the battery <NUM> is increased; and on another hand, the cooperating surfaces between the mounting base <NUM> and the plurality of battery cells <NUM> are increased, so that the ability of the battery cell <NUM> of resisting the twisting force generated when the output electrode <NUM> is fixed at the mounting base <NUM> can be improved. As shown in <FIG>, X direction is an axis direction of the cylindrical battery cell, a plurality of cylindrical battery cells are distributed in Y direction and Z direction, and there is a gap between two adjacent cylindrical battery cells, where the X direction, the Y direction and the Z direction are perpendicular to each other.

Certainly, it may be understood that when the contour of the battery cell <NUM> is a cuboid or a cube and there are gaps among the plurality of battery cells <NUM>, the mounting base <NUM> is inserted into the gaps among the plurality of battery cells <NUM>.

In some embodiments, the mounting base <NUM> may be inserted into the gaps among the plurality of battery cells <NUM> in different forms. For example, the mounting base <NUM> may be inserted into the gaps from the end part of the battery cell <NUM> along an axis direction (X direction shown in <FIG>) of the battery cell <NUM>. As shown in <FIG> which is an assembling schematic diagram of a mounting base <NUM> and a battery cell <NUM> provided by another embodiment of the present application, the mounting base <NUM> may also be inserted into the gaps along a direction (Y direction shown in <FIG>) perpendicular to the axis direction of the battery cell <NUM>, or the mounting base <NUM> may be inserted into the gaps along the direction perpendicular to the axis direction of the battery cell <NUM>, and, after being formed to partly correspond to the battery cell <NUM>, then move to a preset mounting position along the axis direction of the battery cell <NUM>. It should be noted that the axis direction of the battery cell <NUM> may be understood as a direction perpendicular to the cover plate <NUM> of the battery cell <NUM>, which is the X direction in <FIG>.

As shown in <FIG>, the mounting base <NUM> includes a substrate <NUM> and a connecting piece <NUM>, the substrate <NUM> is used to mount the battery cell <NUM>, and the connecting piece <NUM> is arranged in the substrate <NUM>. For example, the connecting piece <NUM> may be embedded into the substrate <NUM> after the substrate <NUM> is formed, or the connecting piece <NUM> may also be pre-embedded in the substrate <NUM>. The connecting piece <NUM> is used to be connected to the output electrode <NUM> so as to fix the output electrode <NUM> at the substrate <NUM>. The connecting piece <NUM> is located between two battery cells <NUM> so as to reduce occupied space. The substrate <NUM> may be an insulating piece, such as plastic (such as PVC (polyvinyl chloride), PE, PP and the like), thereby saving the manufacturing cost; and the connecting piece <NUM> is a conductive part, such as conductive metal (such as copper, other alloy and the like), which is used to realize electric connection between the output electrode <NUM> and an output electrode <NUM> of another battery module <NUM> or other conductive parts.

In some embodiments, when the mounting base <NUM> and the cylindrical battery cell are assembled, due to the contour limitation of the cylindrical battery cell, there is a relatively large gap between two adjacent cylindrical battery cells, and the connecting piece <NUM> is located in the gap, so that the occupied space can be reduced and the energy density can be increased.

In some embodiments, the connecting piece <NUM> may be a nut. When the output electrode <NUM> and the mounting base <NUM> are assembled, the output electrode <NUM> is connected to the nut through a screw or other threaded pieces, so that assembling and operating are facilitated, and conductive connection between the output electrode <NUM> and other parts can be realized. For example, when the output electrode <NUM> and the mounting base <NUM> are assembled, the output electrode <NUM> is fixed to the connecting piece <NUM> through the threaded piece (screw or bolt), and the threaded piece is in threaded connection with the connecting piece <NUM>, that is, the output electrode <NUM> is fixed at the substrate <NUM> of the mounting base <NUM> through the threaded piece and the connecting piece <NUM>. Through the cooperating mode of the threaded piece and the connecting piece <NUM>, assembling and operating are facilitated.

When the output electrode <NUM> is in conductive connection with other parts (the output electrode <NUM> of another battery module <NUM> or other conductive parts), through the match between the threaded piece and the connecting piece <NUM>, the output electrode <NUM> and other parts are jointly fixed at the substrate <NUM> of the mounting base <NUM>, that is, the output electrode <NUM> and other parts are clamped by the threaded piece and the connecting piece <NUM>, and the output electrode <NUM> is in conductive connection with other parts. In order to ensure the conductive connection between the output electrode <NUM> and other parts, the threaded piece and the connecting piece <NUM> are both made of a conductive material.

The output electrode <NUM> is connected to the connecting piece <NUM> through the threaded piece, to realize connection between the output electrode <NUM> and the mounting base <NUM>. Since the mounting base <NUM> is supported by the battery cell <NUM>, the twisting force generated when fixing the output electrode <NUM> through the threaded piece at the mounting base <NUM> is transmitted to the substrate <NUM> through the connecting piece <NUM>, and is further transmitted to the battery cell <NUM> through the substrate <NUM>, so that the battery cell <NUM> bears the twisting force generated when fixing the output electrode <NUM> at the mounting base <NUM> through the threaded piece.

In some embodiments of the present application, an outer surface of the connecting piece <NUM> and an outer surface of the substrate <NUM> are coplanar so as to ensure that the output electrode <NUM> and the substrate <NUM> have a larger contact area when the output electrode <NUM> is fixed at the connecting piece <NUM> through the threaded piece, that is, the substrate <NUM> has a larger supporting area towards the output electrode <NUM>.

<FIG> is an assembling schematic diagram of a limiting surface of a mounting base <NUM> and a battery cell <NUM> provided by an embodiment of the present application. In some embodiments, as shown in <FIG>, the substrate <NUM> includes at least one limiting surface <NUM>, and the limiting surface <NUM> is matched with the contour of the battery cell <NUM>. It may be understood that the limiting surface <NUM> is matched with the contour of a part of the battery cell <NUM> corresponding to the mounting base <NUM>.

For example, when the battery cell <NUM> is a cylindrical battery cell, the limiting surface <NUM> may be an arc surface, and the limiting surface <NUM> is matched with an external peripheral surface of the cylindrical battery cell <NUM>; or when the rough contour of the battery cell <NUM> is a cuboid or a cube, the limiting surface <NUM> may be a plane, and the limiting surface <NUM> is matched with an external peripheral surface of the battery cell <NUM>.

The limiting surface <NUM> may be attached to the battery cell <NUM>, or there may be a gap between the limiting surface <NUM> and the surface of the battery cell <NUM>; and the limiting surface <NUM> is used to realize positioning of the mounting base <NUM> when the mounting base <NUM> is being assembled with the battery cell <NUM>. Through the match between the limiting surface <NUM> and the battery cell <NUM>, on one hand, the mounting base <NUM> being mounted at the battery cell <NUM> is facilitated, to realize mounting positioning between the mounting base <NUM> and the battery <NUM>, and limit the displacement of the mounting base <NUM>; on another hand, space can be saved and the energy density can be increased.

According to different contour shapes of the battery cell <NUM>, the limiting surface <NUM> may be a flat plane, may also be an arc surface, or may further be a hole wall of a circular hole.

In order to facilitate the twisting force generated when the output electrode <NUM> is fixed at the mounting base <NUM> being applied to the battery cell <NUM>, in <FIG>, the limiting surface <NUM> is attached to the external peripheral surface of the battery cell <NUM>. Since the limiting surface <NUM> is matched with the contour of the battery cell <NUM>, the limiting surface <NUM> is attached to the external peripheral surface of the battery cell <NUM>, and a better limitation of displacement of the mounting base <NUM> can be realized, so that the battery cell <NUM> can support the mounting base <NUM> when the output electrode <NUM> is connected to the mounting base <NUM>.

In other embodiments, when the mounting base <NUM> and the battery cell <NUM> are assembled, the at least one limiting surface <NUM> may unconnected with the external peripheral surface of the battery cell <NUM>, that is, there is a gap between the limiting surface <NUM> and the battery cell <NUM>, thereby facilitating the mounting guide of the mounting base <NUM>. There is a movable space between the limiting surface <NUM> and the battery cell <NUM> to adjust the position of the mounting base <NUM>.

For example, <FIG> is an assembling schematic diagram of a limiting surface of the mounting base <NUM> and the battery cell <NUM> provided by another embodiment of the present application. In <FIG>, two limiting surfaces <NUM> are attached to the external peripheral surfaces of two cylindrical battery cells respectively, and there is a gap between one of the limiting surface <NUM> and the battery cell <NUM>. <FIG> is an assembling schematic diagram of a limiting surface of the mounting base <NUM> and the battery cell <NUM> provided by yet another embodiment of the present application. In <FIG>, two holes 1311a are sleeved on the external peripheral surfaces of the two battery cells <NUM> respectively, and there may be a gap between the holes 1311a and the corresponded battery cells <NUM>, that is, the limiting surface <NUM> includes an inner wall of the hole 1311a, and at last part of the inner wall of the hole 1311a is not in contact with the external peripheral surface of the battery cell <NUM>. The outer surface of the mounting base <NUM> may also be provided with a limiting surface <NUM> matching with other battery cells <NUM>, which may be attached to the battery cell <NUM>. In the above solution, the position of the mounting base <NUM> may be limited jointly through matching between a plurality of limiting surfaces <NUM> and one of the battery cell <NUM> or a plurality of battery cells <NUM>, so that the positioning requirement of the mounting base <NUM> is met, and the mounting strength of the mounting base <NUM> is improved.

It should be noted that the external peripheral surface of the battery cell <NUM> refers to a surface of the battery cell <NUM> matching with the mounting base <NUM>, it may be a surface of a shell <NUM> of the battery cell <NUM>, or may also be a surface of the shell <NUM> of the battery cell <NUM> and a surface of the cover plate <NUM>.

In some embodiments, the substrate <NUM> includes a plurality of limiting surfaces <NUM>, and the plurality of limiting surfaces <NUM> are used to be attached to the external peripheral surfaces of the plurality of battery cells <NUM>. The plurality of limiting surfaces <NUM> are attached to the external peripheral surfaces of the plurality of battery cells <NUM>, so that the mounting positioning surface of the mounting base <NUM> is increased, the mounting strength of the mounting base <NUM> is improved, and the twisting force generated when the output electrode <NUM> is mounted at the mounting base <NUM> is transmitted to the battery cell <NUM> more easily.

<FIG> is a structural schematic diagram of a mounting base <NUM> provided by an embodiment of the present application. In some embodiments, the substrate <NUM> includes a hole 1311a. The hole 1311a is used to be sleeved at the external peripheral surface of the battery cell <NUM>. There may be one or a plurality of holes 1311a. On one hand, the hole 1311a is sleeved at the external peripheral surface of the battery cell <NUM>, thereby facilitating the mounting positioning of the mounting base <NUM>; and on another hand, the above solution can facilitate the mounting base <NUM> transmitting the twisting force to the battery cell <NUM>.

According to different shapes of the battery cells <NUM>, as shown in <FIG>, when the battery cell <NUM> is a cylindrical battery cell, the hole 1311a may be a circular hole, and a hole wall of the circular hole is a limiting surface <NUM>; and when the battery cell <NUM> is a cubic battery cell, the hole 1311a may be a square hole, the square hole includes four planes, and each plane is a limiting surface <NUM>. A center line of the hole 1311a is parallel with the axis of the battery cell <NUM>. It should be noted that the hole 1311a is sleeved at the external peripheral surface of the battery cell <NUM>, which may be understood that the mounting base <NUM> is sleeved at the outer side of the battery cell <NUM>, and the hole may be attached to the external peripheral surface of the battery cell <NUM> or may also not be attached to the external peripheral surface of the battery cell <NUM>.

<FIG> is a structural schematic diagram of a mounting base <NUM> provided by another embodiment of the present application. In some embodiments, as shown in <FIG> and <FIG>, when the battery cell <NUM> is a cylindrical battery cell and the substrate <NUM> includes one of the hole 1311a, in order to prevent the mounting base <NUM> from rotating relative to the battery cell <NUM>, the substrate <NUM> further includes at least one limiting surface <NUM> for being attached to the external peripheral surface of the adjacent battery cell <NUM>, thereby positioning the mounting base <NUM>. When the output electrode <NUM> is fixed on the mounting base <NUM> in a direction perpendicular to the axis direction of the battery cell <NUM>, the limiting surface <NUM> is attached to the external peripheral surface of the adjacent battery cell <NUM> corresponding to the hole 1311a, so that when the output electrode <NUM> is fixed at the connecting piece <NUM>, rotation of the substrate <NUM> relative to the battery cell <NUM> can be limited, and the mounting base <NUM> can transmit the twisting force to the battery cell <NUM> more easily.

For example, as shown in <FIG>, the substrate <NUM> further includes a planar-shaped limiting surface <NUM>, the limiting surface <NUM> is attached to the adjacent battery cell <NUM>, and the position of the mounting base <NUM> is jointly limited by the limiting surface <NUM> and the hole 1311a, thereby ensuring the positioning and supporting of the mounting base <NUM> by the battery cell <NUM>. For example, as shown in <FIG>, the substrate <NUM> further includes an arc-shaped limiting surface <NUM>, the contour of the limiting surface <NUM> is matched with the contour of the external peripheral surface of the battery cell <NUM>, the limiting surface <NUM> is attached to the external peripheral surface of the adjacent battery cell <NUM>, and the position of the mounting base <NUM> is jointly limited by the limiting surface <NUM> and the hole 1311a.

<FIG> is a structural schematic diagram of a mounting base <NUM> provided by yet another embodiment of the present application. In some embodiments, as shown in <FIG>, the substrate <NUM> includes two holes 1311a, the two holes 1311a are used to be sleeved at the external peripheral surfaces of the two battery cells <NUM> respectively, and the two holes 1311a jointly limit the position of the mounting base <NUM>. Since the two holes 1311a are sleeve at the external peripheral surfaces of the two battery cells <NUM> respectively, the ability of the battery cell <NUM> of resisting the twisting force generated when the output electrode <NUM> is fixed at the mounting base <NUM> can be improved, and at the same time, rotation of the substrate <NUM> relative to the battery cell <NUM> can be limited.

In some embodiments, as shown in <FIG>, the substrate <NUM> includes two circle-shaped holes 1311a which are symmetrically distributed, and the two holes 1311a correspond to two cylindrical battery cells <NUM> respectively. When the substrate <NUM> is mounted at the battery cells <NUM>, the two holes 1311a are respectively sleeved at the external peripheral surfaces of the two battery cells <NUM>, and the hole walls of the holes 1311a are attached to the external peripheral surfaces of the battery cells <NUM>. In some embodiments, the two holes 1311a respectively correspond to two adjacent battery cells <NUM>, the connecting piece <NUM> is located between the two holes 1311a, and a geometric center line of the connecting piece <NUM> is perpendicular to a plane where center lines of the two holes 1311a are located. When the output electrode <NUM> is connected to the connecting piece <NUM>, the substrate <NUM> is stressed in a balanced manner, and the substrate <NUM> can be supported by two battery cells <NUM>, so that the battery cells <NUM> can resist the twisting force generated when the output electrode <NUM> is mounted at the mounting base <NUM>.

As shown in <FIG>, the substrate <NUM> may further include an arc-shaped limiting surface <NUM>, the limiting surface <NUM> is located between two circle-shaped holes 1311a, the limiting surface <NUM> is matched with the contour of the battery cell <NUM>, and the limiting surface <NUM> is attached to the battery cell <NUM>, so that the battery cell <NUM> supports the substrate <NUM> when the output electrode <NUM> is connected to the connecting piece <NUM>.

<FIG> is an assembling schematic diagram of a limiting portion <NUM> of a mounting base <NUM> and a battery cell <NUM> provided by an embodiment of the present application. In some embodiments, as shown in <FIG>, a limiting portion <NUM> is formed on an end face of the substrate <NUM>, and the limiting portion <NUM> is used to be attached to an end part (a cover plate <NUM>) of the battery cell <NUM> after the substrate <NUM> is mounted at the battery cell <NUM>, so that the substrate <NUM> is limited in the axis direction of the battery cell <NUM>, thereby limiting the further movement of the substrate <NUM> in the axis direction of the battery cell <NUM> and determining the position of the substrate <NUM>. It should be noted that the end part of the battery cell <NUM> may be understood as a surface of the cover plate <NUM> where the electrode terminal <NUM> is located, and the electrode terminal <NUM> is located at the end part of the battery cell <NUM> and is protruded out of the cover plate <NUM>. The end face of the substrate <NUM> may be understood as an end face of one end of the substrate <NUM> in the axis direction of the battery cell <NUM>.

In some embodiments, as shown in <FIG>, the limiting portion <NUM> is a bump, and the bump extends in a direction perpendicular to the axis direction of the battery cell <NUM> and is protruded out from the limiting surface <NUM>, thereby limiting the further movement of the mounting base <NUM> relative to the battery cell <NUM> in the axis direction of the battery cell <NUM> after the mounting base <NUM> is mounted at the battery cell <NUM>.

In some embodiments, when the mounting base <NUM> includes a hole 1311a, a plurality of limiting portions <NUM> may be arranged in a circumferential direction of the hole 1311a, and the plurality of limiting portions <NUM> are rotational symmetry about a center line of the hole 1311a, thereby ensuring the assembling stability of the mounting base <NUM> and the battery cell <NUM>. <FIG> is a structural schematic diagram of a limiting portion <NUM> of a mounting base <NUM> provided by an embodiment of the present application. As shown in <FIG>, two limiting portions <NUM> are arranged in the circumferential direction of the hole 1311a, and the two limiting portions <NUM> are distributed symmetric about the center line of the hole 1311a.

<FIG> is a structural schematic diagram of a limiting portion <NUM> of a mounting base <NUM> provided by another embodiment of the present application. As shown in <FIG>, the limiting portion <NUM> is of a plate-shaped structure. When the mounting base <NUM> includes a hole, the limiting portion <NUM> covers the hole, and the limiting portion <NUM> is provided with a through hole <NUM> for the electrode terminal <NUM> to expose. After the mounting base <NUM> is assembled at the battery cell <NUM>, the limiting portion <NUM> is attached to the end part of the battery cell <NUM>, and the electrode terminal <NUM> is exposed out from the hole, so that the electrode terminal <NUM> is connected to an electrode terminal <NUM> of the adjacent battery cell <NUM>.

<FIG> is an exploded view of a battery module <NUM> provided by another embodiment of the present application. In some embodiments, referring to <FIG> and <FIG>, the battery <NUM> further includes an isolating piece <NUM>, and the isolating piece <NUM> may be an insulating piece for isolating the battery cell <NUM> from other parts (such as a harness); the isolating piece <NUM> is further used to realize the fixation of the harness (not shown in the figure), a confluence part (not shown in the figure); and when the battery <NUM> is assembled, the isolating piece <NUM> can also fix the battery cell <NUM>. The isolating piece <NUM> is configured to be attached to one side of the limiting portion <NUM> away from the battery cell <NUM>. The isolating piece <NUM> is attached to the limiting portion <NUM> to limit the limiting portion <NUM> being located between the isolating piece <NUM> and the end part of the battery cell <NUM>, so that the mounting stability of the mounting base <NUM> and the battery cell <NUM> is improved, and the risk of movement of the output electrode <NUM> is reduced.

In some embodiments, the output electrode <NUM> is fixed on the isolating piece <NUM>, so that the mounting stability of the output electrode <NUM> is ensured. In the assembling process of the battery <NUM>, after the isolating piece <NUM> and the battery cell <NUM> are assembled, part of the output electrode <NUM> is located at the outer side of the edge of the isolating piece <NUM>, facilitating connection between the output electrode <NUM> and the mounting base <NUM>.

In the working process of the battery <NUM>, the environmental temperature varies, which can affect the working state of the battery cell <NUM>. When the environmental temperature is relatively low, in order to ensure the normal work of the battery cell <NUM>, it is necessary to heat the battery cell <NUM>.

<FIG> is a schematic diagram of a heating film <NUM> of a battery module <NUM> provided by an embodiment of the present application; and <FIG> is a schematic diagram of an avoiding portion of a mounting base provided by an embodiment of the present application. In some embodiments, as shown in <FIG> and <FIG>, the battery <NUM> further includes a heating film <NUM>, and the heating film <NUM> is used to heat the battery cell <NUM>; and as shown in <FIG>, the mounting base <NUM> further includes an avoiding portion <NUM>, and the heating film <NUM> is configured to penetrate through the avoiding portion <NUM> to heat the battery cell <NUM>. The avoidance of the heating film <NUM> is realized by the avoiding portion <NUM>, thereby ensuring the heating film <NUM> can heat the battery cell <NUM>, ensuring the heating effect, and improving the electrochemical property of the battery cell <NUM>.

In some embodiments, the avoiding portion <NUM> may be located at an end part of the substrate <NUM> which is provided with a limiting portion <NUM>, both the avoiding portion <NUM> and the limiting portion <NUM> are located at the end face of the substrate <NUM>. It may be understood that the avoiding portion <NUM> is a groove, that is, the end face of the substrate <NUM> is provided with a groove to form the avoiding portion <NUM>, and the remaining part of the end face forms the limiting portion <NUM>. The avoiding portion <NUM> may also be a peripheral wall of the substrate <NUM>. It may be understood that a groove is formed at the peripheral wall of the substrate <NUM> to form the avoiding portion <NUM>, and the heating film <NUM> penetrates through the avoiding portion <NUM> to be in contact with the peripheral wall of the battery cell <NUM> to heat the battery cell <NUM>.

<FIG> is an enlarged view of a position B in <FIG>. In some embodiments, as shown in <FIG>, the heating film <NUM> is provided with a first avoiding hole <NUM> and a second avoiding hole <NUM>, the first avoiding hole <NUM> is used for the electrode terminal <NUM> of the battery cell <NUM> to penetrate through, the second avoiding hole <NUM> is used for the limiting portion <NUM> to penetrate through, and the heating film <NUM> is used to heat the end part (cover plate <NUM>) of the battery cell <NUM>. After the mounting base <NUM> is assembled at the battery cell <NUM>, the heating film <NUM> covers the mounting base <NUM>, and the heating film <NUM> is attached to the end part of the battery cell <NUM> to heat the battery cell <NUM>.

As shown in <FIG> and <FIG>, the battery module <NUM> further includes an outer cover <NUM>, and the outer cover <NUM> is used to fix the isolating piece <NUM> on the battery cell <NUM> to play a role in protecting the isolating piece <NUM>, the harness and the battery cell <NUM>.

As shown in <FIG>, the battery module <NUM> further includes a protective cover (not shown in the figure), the substrate <NUM> of the mounting base <NUM> is provided with two supporting arms <NUM>, the two supporting arms <NUM> are symmetrically distributed on two sides of the connecting piece <NUM>, an accommodating space between the two supporting arms <NUM> is limited for accommodating the protective cover, a clamping groove <NUM> matched with the protective cover is formed at each supporting arm <NUM>, the protective cover is configured to be buckled with the clamping groove <NUM>, and the protective cover is used to protect and isolate the output electrode.

An embodiment of the present application further provides an electric apparatus. The electric apparatus may include the battery cell <NUM> in the aforementioned embodiments. Optionally, the electric apparatus may be a vehicle <NUM>, a ship or spacecraft.

The battery <NUM> and the electric apparatus in the embodiments of the present application are described above. A manufacturing method of the battery <NUM> according to the embodiments of the present application will be described below. The parts which are not described in detail may be referenced from the aforementioned embodiments.

<FIG> is a schematic flowchart of a manufacturing method of a battery <NUM> provided by an embodiment of the present application. As shown in <FIG>, the method may include: <NUM>, providing a plurality of battery cells <NUM>; <NUM>, electrically connecting the plurality of battery cells <NUM>; <NUM>, providing a mounting base <NUM>; <NUM>, mounting the mounting base <NUM> on at least one of the plurality of battery cells <NUM>; <NUM>, electrically connecting an output electrode <NUM> and the plurality of battery cells <NUM>, so that the output electrode <NUM> can export electric energy of the plurality of battery cells <NUM>; and <NUM>, fixing the output electrode <NUM> on the mounting base <NUM>.

It should be noted that the sequence of the step "electrically connecting the output electrode <NUM> and the plurality of battery cells <NUM>" and the step "fixing the output electrode <NUM> on the mounting base <NUM>" may be interchangeable. For example, <FIG> shows a schematic flowchart of a manufacturing method of a battery <NUM> provided by another embodiment of the present application. The method may include: <NUM>, providing a plurality of battery cells <NUM>; <NUM>, electrically connecting the plurality of battery cells <NUM>; <NUM>, providing a mounting base <NUM>; <NUM>, mounting the mounting base <NUM> on at least one of the plurality of battery cells <NUM>; <NUM>, fixing the output electrode <NUM> on the mounting base <NUM>; and <NUM>, electrically connecting the output electrode <NUM> and the plurality of battery cells <NUM>, so that the output electrode <NUM> can export electric energy of the plurality of battery cells <NUM>.

<FIG> is a schematic flowchart of a manufacturing method of a battery <NUM> provided by yet another embodiment of the present application. As shown in <FIG>, the method may include: <NUM>, providing a plurality of battery cells <NUM>; <NUM>, electrically connecting the plurality of battery cells <NUM>; <NUM>, providing a mounting base <NUM>, where the mounting base <NUM> includes at least one limiting surface <NUM>, and the limiting surface <NUM> is matched with the contour of the battery cell <NUM>; <NUM>, providing an output electrode <NUM>; <NUM>, electrically connecting the output electrode <NUM> and the plurality of battery cells <NUM>, so that the output electrode <NUM> can export electric energy of the plurality of battery cells <NUM>; and <NUM>, fixing the output electrode <NUM> on the mounting base <NUM>.

It should be noted that the features in the embodiments of the present application may be combined with each other in a non-conflicting situation.

Claim 1:
A battery module (<NUM>), comprising:
a plurality of battery cells (<NUM>), the plurality of battery cells (<NUM>) being electrically connected;
two output electrodes (<NUM>), used to export electric energy of the plurality of battery cells (<NUM>); and
a mounting base (<NUM>), used to fix one of the two output electrodes (<NUM>) of the battery module (<NUM>), the mounting base (<NUM>) comprising at least one limiting surface (<NUM>), the limiting surface (<NUM>) being matched with the contour of the battery cell (<NUM>), and the mounting base (<NUM>) being mounted to part battery cells (<NUM>) of the plurality of battery cells (<NUM>) ;
wherein the mounting base (<NUM>) comprises a substrate (<NUM>) and a connecting piece (<NUM>), the connecting piece (<NUM>) being arranged in the substrate (<NUM>), the connecting piece (<NUM>) being used to be connected to the output electrode (<NUM>) through a threaded piece so as to fix the output electrode (<NUM>) at the substrate (<NUM>), the connecting piece (<NUM>) being located between the two battery cells (<NUM>), and the connecting piece (<NUM>) being a conductive part; and
wherein the substrate (<NUM>) comprises two circle-shaped holes (1311a) which are symmetrically distributed, and the two circle-shaped holes (1311a) correspond to two cylindrical battery cells (<NUM>) respectively, when the substrate (<NUM>) is mounted at at least one of the plurality of battery cells (<NUM>), the two circle-shaped holes (1311a) are respectively sleeved at external peripheral surfaces of the two cylindrical battery cells (<NUM>), the connecting piece (<NUM>) is located between the two circle-shaped holes (1311a), and a geometric center line of the connecting piece (<NUM>) is perpendicular to a plane where center lines of the two circle-shaped holes (1311a) are located.