BATTERY DEVICE ASSEMBLING METHOD AND BATTERY DEVICE

A battery device assembling method includes the following steps. A plurality of batteries are stacked in a first direction. A plurality of collection connectors are electrically connected to the batteries correspondingly. After the batteries and the collection connectors are placed together in a battery box, the collection connectors are electrically connected to a collection structure, such that the collection structure collects information of the batteries. A battery device is assembled through the battery device assembling method.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of China application serial no. 202210806331.9, filed on Jul. 8, 2022. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND

Technical Field

The disclosure relates to the technical field of batteries, and in particular, relates to a battery device assembling method and a battery device.

Description of Related Art

In the related art, when a battery device is to be assembled, the batteries are generally put into the battery box first, and then the conductive member and the batteries are welded to implement functions such as electrical connection or detection. After the batteries are placed in the battery box, since the space between the batteries and the battery box is narrower and smaller, a sufficient space is not provided for connecting tools such as a welding torch. The problem of difficulty in welding occurs, thereby affecting the reliability of the connection between the batteries and the conductive member.

SUMMARY

The disclosure provides a battery device assembling method and a battery device.

According to the first aspect of the disclosure, the disclosure provides a battery device assembling method, and the method includes the following steps.

A plurality of batteries are stacked in a first direction.

A plurality of collection connectors are electrically connected to the batteries correspondingly.

The batteries and the collection connectors are placed together in a battery box.

The collection connectors are electrically connected to a collection structure, such that the collection structure collects information of the batteries.

According to the second aspect of the disclosure, the disclosure provides a battery device that is assembled through the abovementioned battery device assembling method. The battery device includes a plurality of batteries, a low-voltage signal collection component, and a frame. The batteries are stacked in a first direction. The low-voltage signal collection component includes a collection structure and a plurality of collection connectors. One ends of the collection connectors are electrically connected to the batteries correspondingly, and the other ends of the collection connectors are electrically connected to the collection structure. The frame surrounds the batteries. A connection position of at least one of the collection connectors and the battery is lower than a top surface of the frame in the first direction.

DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the exemplary embodiments of the disclosure will be described clearly and explicitly in conjunction with the drawings in the exemplary embodiments of the disclosure. The description proposed herein is just the exemplary embodiments for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that and various modifications and variations could be made thereto without departing from the scope of the disclosure.

In the description of the present disclosure, unless otherwise specifically defined and limited, the terms “first”, “second” and the like are only used for illustrative purposes and are not to be construed as expressing or implying a relative importance. The term “plurality” is two or more. The term “and/or” includes any and all combinations of one or more of the associated listed items.

In particular, a reference to “the” object or “a” and “an” object is intended to denote also one of a possible plurality of such objects. Unless otherwise defined or described, the terms “connect”, “fix” should be broadly interpreted, for example, the term “connect” can be “fixedly connect”, “detachably connect”, “integrally connect”, “electrically connect” or “signal connect”. The term “connect” also can be “directly connect” or “indirectly connect via a medium”. For the persons skilled in the art, the specific meanings of the abovementioned terms in the present disclosure can be understood according to the specific situation.

Further, in the description of the present disclosure, it should be understood that spatially relative terms, such as “above”, “below” “inside”, “outside” and the like, are described based on orientations illustrated in the figures, but are not intended to limit the exemplary embodiments of the present disclosure.

In the context, it should also be understood that when an element or features is provided “outside” or “inside” of another element(s), it can be directly provided “outside” or “inside” of the other element, or be indirectly provided “outside” or “inside” of the another element(s) by an intermediate element.

The embodiments of the disclosure further provide a battery device which is assembled through a battery device assembling method. As shown inFIG.1toFIG.3, the battery device includes a plurality of batteries21, a low-voltage signal collection component3, and a frame12. The batteries21are stacked and arranged in a first direction. The low-voltage signal collection component3includes a collection structure31and a plurality of collection connectors32. One ends of the collection connectors32are electrically connected to the batteries correspondingly, and the other ends of the collection connectors32are electrically connected to the collection structure31. The frame12surrounds the batteries21, and the connection position of at least one of the collection connectors32and the battery21is lower than a top surface of the frame12in the first direction.

By arranging the plurality of batteries21to be stacked in the first direction, the energy density of the battery device is increased. By arranging the batteries21and the collection connectors32to be separate structures and arranging one ends of the collection connectors32to be electrically connected to the batteries21correspondingly, it is ensured that the batteries21and the collection connectors32are reliably connected. By arranging the other ends of the collection connectors32to be electrically connected to the collection structure31individually, the collection structure31is allowed to collect information of the batteries21, such that performance indicators such as the power of the batteries21may be monitored. By arranging the batteries21to be surrounded by the frame12, the side surfaces of the batteries21are protected by the frame12. By arranging the connection position of at least one of the collection connectors32and the battery21to be lower than the top surface of the frame12, the connection position is protected by the frame12.

It should be noted that the collection connectors32may be electrically connected to terminals213of the batteries21directly, and the collection connectors32may also be electrically connected to the terminals213of the batteries21indirectly, for instance, the collection connectors32are electrically connected to the terminals213of the batteries21through a busbar.

It should be noted that the collection structure31may be a flexible wire harness or a printed circuit board (PCB).

Each battery includes a cell and an electrolyte and acts as the smallest unit capable of performing electrochemical reactions such as charging/discharging. The cell refers to a unit formed by winding or laminating a stacked part, and the stacked part includes a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarities of the first electrode and the second electrode may be interchanged.

In an embodiment, the battery21is a laminated battery, so that the battery21may not only be conveniently assembled but may also be processed to obtain a battery21with a longer length.

To be specific, the cell is a laminated cell. The cell has first electrode pieces that are stacked on each other, second electrode pieces whose electrical properties are opposite to the first electrode pieces, and diaphragm pieces disposed between the first electrode pieces and the second electrode pieces. Therefore, multiple pairs of the first electrode pieces and the second electrode pieces are stacked to form the laminated cell.

Optionally, the battery21may be a wound battery. That is, the first electrode pieces, the second electrode pieces whose electrical properties are opposite to the first electrode pieces, and the diaphragm pieces disposed between the first electrode pieces and the second electrode pieces are wound to obtain a wound cell.

It should be noted that, each battery21provided in this embodiment is a square battery. The height direction of each battery21, that is, the stacking direction of the plurality of batteries21, is defined as the first direction, the length direction of the battery21is defined as a second direction, and the width direction of the battery21is defined as a third direction. The first direction, the second direction, and the third direction are perpendicular among each other. The first direction, the second direction, and the third direction only represent the spatial directions and have no substantial meaning.

In an embodiment, each battery21has two first side surfaces211opposite to each other and four second side surfaces212connected end-to-end, the four second side surfaces212are disposed between the two first side surfaces211, and the surface area of each of the first side surfaces211is greater than the surface area of each of the second side surfaces212. Herein, the collection structure31is disposed on an upper one of the first side surfaces211of the uppermost one of the batteries21in the first direction. The batteries21stacked in the first direction form a battery unit2, there are a plurality of battery units2in this embodiment, and adjacent two of the battery units2are connected through the collection structure31.

The external shape of each battery21is similar to a rectangular structure. By arranging two first side surfaces211that are opposite to each other and four second side surfaces212that are connected end-to-end and disposed between the two first side surfaces211, the two first side surfaces211and the four second side surfaces212form six surfaces of the rectangular structure. By arranging the surface area of each first side surface211to be greater than the surface area of each second side surface212, the surface area of the first side surface211is relatively large, and the first side surface211may also be referred to as a larger surface.

By arranging the collection structure31to be disposed on the first side surfaces211of the batteries21located at the uppermost end in the first direction, the first side surfaces211of the batteries21provide a position for allowing the collection structure31to be placed, and the collection structure31is thus well supported. Since the surface area of the first side surface211is larger, the first side surface211provide a larger arrangement space of the collection structure31. Further, the collection structure31is disposed on the uppermost batteries21, and it is equivalent that the collection structure31is led out from the top, so even after the batteries21are put into the box, the cables of the collection structure31may still be conveniently arranged.

To be specific, two terminals213are respectively provided at both ends of each battery21. By making the distance between the two terminals213relatively large and having the two terminals213led out from both ends, the interference of the terminals213during installation is prevented from occurring. The collection structure31is electrically connected to the terminals213, and the collection structure31can collect various performance indicators of the batteries21through the terminals213to characterize the actual use condition of the batteries21.

In an embodiment, as shown inFIG.3toFIG.4, the two terminals213are respectively disposed on opposite sides of the first side surface211, or the two terminals213are respectively disposed on opposite sides of the second side surface212.

By arranging the terminals213on the first side surface211, that is, the terminals213are disposed on the larger surface having a larger surface area, the first side surface211provides a relatively large arrangement position for the terminals213, so that a large installation space is provided for the installation of the terminals213and other conductive elements, and the terminals213may thus be easily installed. Further, by respectively arranging the two terminals213on opposite sides of the first side surface211, the distance between the two terminals213is relatively large, so that interference of the terminals213during installation is prevented from occurring.

By arranging the terminals213on the second side surface212, the terminals213are arranged on the narrower surface with a relatively small surface area. In this embodiment, it is not limited whether the terminals213are arranged on a larger surface or a narrower surface, as long as the terminals213may be led out from both ends, it is within the protection scope of this embodiment.

It should be noted that the projections of the two terminals213on the reference plane may overlap, or the projections of the two terminals213on the reference plane may not overlap. Herein, the reference plane is parallel to the plane where the first direction and the third direction are located. In other words, the two terminals213may be disposed facing each other or may be disposed in an alternating manner. The positions of the two terminals213are not limited and may be adjusted according to actual production conditions.

In an embodiment, two collection structures31are respectively disposed on opposite sides of the first side surface211, and the two terminals213of the same battery21are respectively connected to the two collection structures31correspondingly.

When multiple batteries21are connected in series or in parallel, by arranging the two terminals213of the same battery21to be respectively and correspondingly connected to the two collection structures31, the two collection structures31can respectively collect data on both sides of the battery21. In this way, independence is provided, and mutual influence and interference are prevented from occurring.

In an embodiment, as shown inFIG.3toFIG.4, the low-voltage signal collection component3further includes a conductive connector33, and the collection connectors32are electrically connected to the collection structure31through the conductive connector33.

Since the batteries21are connected to the collection connectors32correspondingly, if the collection connectors32are directly connected to the collection structure31, then, after the batteries21are put into a battery box1, the collection connectors32need to be connected to the collection structure31in sequence. However, the space between the battery box1and the batteries21is relatively small, which makes it difficult to connect the collection connectors32to the collection structure31. By electrically connecting the collection connectors32to the conductive connector33, the conductive connector33integrates the collection connectors32and aggregates the collection connectors32. The collection connectors32are electrically connected to the collection structure31through the conductive connector33, and the conductive connector33serves as an intermediate connection. The collection structure31only needs to be connected to the conductive connector33acting as the main branch structure, and the collection structure31may be connected to the collection connectors32. It thus can be seen that a simplified process is provided, and the production costs are reduced.

Further, since a certain distance is provided between the terminals213and the collection structure31, by placing the collection connectors32between the terminals213and the collection structure31, the collection connectors32serve as an intermediate connection to electrically connect the collection structure31and the terminals213. It is thus ensured that the terminals213and the collection structure31are reliably connected.

In an embodiment, the terminals213of two adjacent batteries21are connected by the collection connectors32, and the collection structure31is electrically connected to the collection connectors32. Herein, the collection connectors32are specifically nickel pieces.

After the plurality of batteries21are stacked in the first direction, the electrical connection between the terminals213of the two adjacent batteries21is achieved through the collection connectors32, so that the batteries21are electrically connected to one another. The collection structure31is electrically connected to the collection connectors32, the process of collecting the signal of the batteries21by the collection structure31through the collection connectors32is thus completed. The collection connectors32are used for electrical connection with the collection structure31while achieving the electrical connection between the terminals213of the batteries21, so the collection connectors32are multifunctional and exhibit better functionality.

It should be noted that, if the terminals213are disposed on the edge of the second side surface212or the first side surface211, the collection connectors32are strip-shaped structures. The collection connectors32extend in the first direction, and the collection connectors32may be sequentially connected to the terminals213of the batteries21stacked in the first direction.

The terminals213of the batteries21may not protrude from the second side surface212, but the terminals213are arranged on the edge of the first side surface211, which is equivalent to the terminals213being recessed between two adjacent batteries21. If the collection connectors32are connected to both the terminals213and the collection structure31, the precise positioning of both ends of each collection connector32is relatively high. Further, the length of the collection connectors32in the first direction is relatively long, so the collection connectors32may easily break.

As such, the collection connectors32and the collection connector33provided in this embodiment together form a collection end, and the collection connectors32and the collection connector33are separate structures. The sizes of the collection connectors32and the conductive connector33are relatively small, so that errors generated during production and processing may be conveniently controlled. Further, the collection connectors32and the conductive connector33may be installed in sequence and thus are prevented from breaking due to the longer lengths. By arranging the collection connectors32to be electrically connected to the terminals213of the batteries21, the collection connectors32may lead out the current of the terminals213of the batteries21. The collection connectors32are electrically connected to the flexible branch through the conductive connector33, so the conductive connector33functions as a transition between the collection connectors32and the collection structure31.

In an embodiment, the number of the collection connectors32is plural, and one ends of the plurality of collection connectors32are respectively and electrically connected to the terminals213of the plurality of batteries21, and the other ends are electrically connected to the conductive connector33.

The number of collection connectors32corresponds to the number of batteries21. By arranging one ends of the collection connectors32to be electrically connected to the terminals213of the batteries21correspondingly, each collection connector32correspond to one terminal213of a respective one of the batteries21, the independence of the information collected from the terminals213of the batteries21is ensured, and signal interference is prevented from occurring. One terminal213of each battery21and its corresponding collection connector32form a branch. By electrically connecting the other ends of the collection connectors32to the conductive connector33, this is equivalent to that the collection connector33integrates the plurality of branches and aggregates the electrical signals.

In an embodiment, the conductive connector33is connected to the collection structure31through a fixing structure. Through the use of the fixing structure, the fixing between the conductive connector33and the collection structure31is implemented, and the two are ensured to be reliably connected.

It can be understood that the fixing structure may be any one of a plug-in structure, an interference structure, and a welded structure, which represent different fixing methods. In this embodiment, the specific form of the fixing structure is not limited, and the fixing structure may be adjusted according to actual production needs.

It can be understood that an insulating layer is coated on the outside of the fixing structure. The insulating layer is used to isolate the conductive connector33from the collection structure31to ensure the insulating effect.

In an embodiment, the conductive connector33corresponding to the collection connectors32is an integrally-formed structure, or the conductive connector33corresponding to the collection connectors32is a split structure.

If the conductive connector33corresponding to the plurality of collection connectors32is a split structure, the number of the conductive connector33is also multiple. One end of each collection connector32is electrically connected to one terminal213of each battery21correspondingly, and the other end of each collection connector32is electrically connected to one of the conductive connectors33correspondingly. Herein, one end of each conductive connector33that is not connected to the collection connector32is electrically connected to the collection structure31, which is equivalent to the implementation of signal aggregation at the position of the collection structure31.

If the conductive connector33corresponding to the plurality of collection connectors32is an integrally-formed structure, the number of the conductive connector33is one. One end of each collection connector32is electrically connected to one terminal213of each battery21correspondingly, and the other end of each collection connector32is electrically connected to the same conductive connector33correspondingly. That is, plural collection connectors32share the same conductive connector33, which is equivalent to the implementation of signal aggregation at the position of the conductive connector33.

In an embodiment, the conductive connector33is any one of a PCB, flexible printed circuit (FPC), and flexible flat cable (FFC).

IF the conductive connector33is directly similar to a structure similar to a whole PCB, the PCB may also be referred to as a printed circuit board or a printed wiring board. The PCB may be used as a support for the collection connector32and as a carrier for the collection connector32and the collection structure31to be electrically connected to each other.

If the conductive connector33is an FPC or FFC, it is a structure in which a plurality of branch cables are combined into one main cable. To be specific, the FPC or FFC may be a wire, the wire includes a sheath and a cable, the cable is arranged in the sheath, and the sheath protects the cable. In the initial state, the length of the cable and the sheath may be considered to be the same. The two ends of the cable are respectively the main end and the branch end, and when electrical connection is required, the main end of the cable is electrically connected to the collection structure31directly, and the outer sheath of the cable branch is stripped off, so that the cable branch is exposed to the external environment, and at this time, each branch of the cable branch is in a dispersed state, so that each branch is electrically connected to each terminal213of each battery21correspondingly.

In an embodiment, the low-voltage signal collection component3further includes an output end34, and the output end34is electrically connected to the collection structure31. The output end34is used as the lead-out end of the collection structure, and the output end34may be connected to other electrical devices for monitoring index parameters, so that the signals of the batteries21may be transmitted.

It can be understood that the output end34may be disposed at a position directly opposite to one of the battery units2, or the output end34may be disposed outside the battery units2, that is, for one battery accommodating compartment13, the output end34is disposed at the end portion of the battery accommodating compartment13in the third direction, so as to prevent the battery units2from interfering with the output end34.

In an embodiment, the battery device further includes the battery box1. The battery box1includes a bottom plate11, and the batteries21are stacked and disposed on the bottom plate11in the first direction. Herein, the first direction is perpendicular to the bottom plate11.

By stacking the batteries21on the bottom plate11in the first direction, the bottom plate11carries the batteries21, and a good supporting effect is provided. The batteries21are disposed on the bottom plate11by stacking up and down in the first direction, so that the height space is effectively used, and the floor space is thus saved.

In an embodiment, the battery device is a battery module. The battery module includes the plurality of batteries21, and the battery module may further include end plates and side plates. The end plates and the side plates are configured to secure the batteries21. A buffer pad may be arranged between adjacent batteries21, and the buffer pads may also be arranged between the end plates and the batteries21.

In an embodiment, the battery device is a battery pack. By arranging the batteries21in the battery box1, the battery box1is able to protect the batteries21.

It should be noted that, when the number of batteries21is multiple, the multiple batteries21may be arranged in the stacking direction of the batteries21to form a group of batteries21and may then be placed in the battery box1. The batteries21may be secured through the end plates and the side plates. When the batteries21are directly disposed in the battery box1, that is, the batteries21are not required to be arranged into groups, the end plates and the side plates may then be removed.

An embodiment of the disclosure provides a battery device assembling method. With reference toFIG.5, the battery device assembling method includes the following steps. A plurality of batteries21are stacked in a first direction. A plurality of collection connectors32are electrically connected to the batteries21correspondingly. After the batteries21and the collection connectors32are placed together in a battery box1, the collection connectors32are electrically connected to a collection structure31, such that the collection structure31collects information of the batteries21.

In the battery device assembling method provided by this embodiment, by arranging the plurality of batteries21to be stacked in the first direction, the energy density of the battery device is increased. If the batteries21and the collection connectors32are welded after the batteries21are placed in the battery box1, the space between the batteries21and the battery box1is narrow and small, which cannot provide a sufficient space for connecting tools such as a welding torch, so that the problem of difficulty in welding occurs, thereby affecting the reliability of the connection between the batteries21and the collection connectors32. By electrically connecting the plurality of collection connectors32to the plurality of batteries21correspondingly before the batteries21are placed into the battery box1, the problem of not being able to provide installation space for the welding torch between the batteries21and the battery box1is solved. The batteries21and the collection connectors32may thus be reliably connected. The collection connectors32are electrically connected to the collection structure31individually after the batteries21and the collection connectors32are placed in the battery box1together. Since the collection connectors32have already been connected to the batteries21before being placed into the battery box1, after the batteries21are placed into the battery box1, only the collection connectors32need to be connected to the collection structure31. In this way, it is convenient to carry out the overall process operation after the batteries21are placed into the battery box1. By arranging the collection connectors32to be electrically connected to the collection structure31individually, the collection structure31is allowed to collect information of the batteries21, so that performance indicators such as the power of the batteries21may be monitored.

Understandably, the connection position of at least one of the collection connectors32and the battery21is lower than the top surface of the frame12in the first direction. Herein, if it is not that the collection connectors32and the batteries21are electrically connected before being placed into the battery box1, but the batteries21are electrically connected to the collection connectors32after the batteries21are placed into the battery box1, the frame12may then interfere with the connection position of the collection connectors32and the batteries21.

In an embodiment, the battery device assembling method further includes the following steps. The collection connectors32are electrically connected to a conductive connector33before the collection connectors32are electrically connected to the batteries21correspondingly, such that the collection connectors32are electrically connected to the collection structure31through the conductive connector33.

Since the plurality of batteries21are connected to the plurality of collection connectors32correspondingly, if the collection connectors32are directly connected to the collection structure31, then, after the batteries21are placed into the battery box1, the plurality of collection connectors32need to be connected to the collection structure31in sequence. However, the space between the battery box1and the batteries21is relatively small, which makes it difficult to connect the plurality of collection connectors32to the collection structure31. By electrically connecting the plurality of collection connectors32to the conductive connector33, the conductive connector33integrates the plurality of collection connectors32and aggregates the collection connectors32. The collection connectors32are electrically connected to the collection structure31through the conductive connector33, and the conductive connector33serves as an intermediate connection. The collection structure31only needs to be connected to the conductive connector33acting as the main branch structure, and the collection structure31may be connected to the plurality of collection connectors32, such that a simplified process is provided, and the production costs are reduced. Further, since the connection between the collection connectors32and the conductive connector33is performed before the batteries21are put into the battery box1, herein, the connection between the collection connectors32and the conductive connector33is not limited by the space of the battery box1, the operation is relatively easy. Further, the connection reliability between the collection connectors32and the conductive connector33is better.

In an embodiment, the conductive connector33extends in the first direction, and the collection structure31is disposed on the top portion of the batteries21in the first direction.

By arranging the conductive connector33to extend in the first direction, the conductive connector33is equivalent to being disposed on the side surfaces of the batteries21. By arranging the collection structure31on the top portion of the batteries21in the first direction, that is, the collection structure31is equivalent to an ejection structure, it is convenient for the conductive connector33to be directly led to the top surface of the batteries21along the side surfaces of the batteries21, thereby facilitating the connection between the conductive connector33and the collection structure31. Further, if the collection structure31is disposed at the bottom portion and the middle portion of the batteries21in the first direction, the collection structure31may pass through a middle beam of the battery box1during installation. In this case, a through hole for allowing the collection structure31to pass therethrough needs to be provided on the middle beam in advance, so that the structural strength of the middle beam will be reduced while the production and processing costs are increased. By arranging the collection structure31on the top surface of the batteries21in the first direction, the installation of the collection structure31does not need to be affected by the middle beam in the battery box1, and the middle beam is not required to be modified. In this way, the production costs are reduced, and the structural strength of the middle beam is also ensured.

In an embodiment, the conductive connector33is connected to the collection structure31through a fixing structure. Through the use of the fixing structure, the fixing between the conductive connector33and the collection structure31is implemented, and the two are ensured to be reliably connected.

It can be understood that the fixing structure may be any one of a plug-in structure, an interference structure, and a welded structure, which represent different fixing methods. In this embodiment, the specific form of the fixing structure is not limited, and the fixing structure may be adjusted according to actual production needs.

In an embodiment, the output end34is electrically connected to the collection structure31after the collection connectors32are electrically connected to the collection structure31. Alternatively, the output end34is electrically connected to the collection structure31before the collection connectors32are electrically connected to the collection structure31.

To be specific, after the collection connectors32are electrically connected to the collection structure31, the free end of the collection structure31and the output end34may be welded. Since the collection structure31is located at the top portions of the batteries21in the first direction, the connection between the collection structure31and the output terminal34is not affected.

To be specific, the output end34may be electrically connected to the collection structure31before the collection connectors32are electrically connected to the collection structure31. When the collection structure31is connected to the collecting connectors32, it is equivalent that the collection structure31has its own output end34, and the difficulty of connecting the collection structure31and the output end34is reduced.

In an embodiment, the batteries21are stacked in the first direction to form the battery units2. After the battery units2are placed in the battery box1, the collection structure31is electrically connected to the collection connectors32corresponding to the battery units2.

If the number of the battery unit2is one, the collection structure31is used as the lead-out end of the battery unit2to collect the information of each battery21in the entire battery unit2. If the number of battery units2is multiple, the multiple battery units2are arranged according to a certain rule. By electrically connecting the collection structure31to the collection connectors32corresponding to the battery units2, the connection of the multiple battery units2may be achieved by using one collection structure31. In this case, it is equivalent that the battery units2share the same collection structure31, and the collection structure31is an integral structure. In this way, the time required for interconnecting the collection structure31of a multi-segment structure is saved, and the assembly costs of the battery device are saved.

If there are more than one battery units2, two adjacent battery units2are connected by the collection structure31, and the collection structure31bridges two adjacent battery units2. In this way, the collection structure31may be electrically connected to the battery units2correspondingly and collects the signals of the batteries21of the battery units2, so the function of the collection structure31is relatively strong.

It can be understood that, if the battery units2are arranged in sequence in the third direction, the collection structure31extends in the third direction. If the battery units2are arranged in sequence in the second direction, the collection structure31extends in the second direction.

It can be understood that the collection structure31may be a split structure. The plurality of collection structures31are correspondingly connected to the battery units2, and two adjacent collection structures31are electrically connected to each other. The collection structure31may also be an integrally-formed structure. One collection structure31is electrically connected to plural battery units2correspondingly, that is, plural battery units2share the same collection structure31.

It should be noted that the battery box1of the battery device is provided with the frame12and a partition beam (as shown inFIG.1andFIG.2). The frame12is arranged on the bottom plate11, and the frame12is arranged around the battery units2to protect the side surfaces. The partition beam is arranged on the bottom plate11and inside the frame12. The partition beam divides the compartment of the battery box1into the plurality of battery accommodating compartments13, and each battery accommodating compartment13is used for accommodating the battery units2. The collection structure31corresponding to each battery accommodating compartment13is an integrally-formed structure, and the collection structures31corresponding to different battery accommodating compartments13are split structures.

It can be understood that the widths of the conductive connectors33corresponding to different battery units2in the third direction may be the same or may be different. If the number of the conductive connectors33electrically connected to the collection connectors32correspondingly is relatively small, the width of the conductive connectors33in the third direction is relatively small. If the number of the conductive connectors33electrically connected to the collection connectors32correspondingly is relatively large, the width of the conductive connectors33in the third direction is relatively large.

It can be understood that, for each battery unit2, in the first direction, after the connecting pieces of the batteries21are connected to the side surfaces of the batteries21, the connecting pieces are connected to the top portion of the battery unit2through the collection connector32. On the top portion of the battery unit2, the collection structure31is then used to connect the plurality of battery units2, and the series collection is thus achieved.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The disclosure is intended to cover any variations, uses or adaptations of the disclosure. These variations, uses, or adaptations follow the general principles of the disclosure and include common general knowledge or conventional technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are illustrative, and the real scope and spirit of the present disclosure is defined by the appended claims.

It should be understood that the disclosure is not limited to the precise structures that have been described above and shown in the drawings, and various modifications and variations can be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.