Battery module capable of discharging tabs from two sides

Abstract

The utility model discloses a battery module capable of discharging tabs from two sides, which belongs to the technical field of power batteries and at least comprises a first module and a second module, each of the first module and the second module comprises a plurality of battery units which are arranged, and tabs are respectively arranged on two opposite sides of the battery units in the length direction; the first module and the second module are arranged at an interval along the length direction of the battery unit, and the first module and the second module are connected through a middle busbar; a first busbar is arranged on one side, opposite to the middle busbar, of the first module, and a second busbar is arranged on one side, opposite to the middle busbar, of the second module; and the first busbar and the second busbar converge the battery units of the first module and the second module respectively. According to the utility model, double-row and multi-row stacking of the battery with the tabs on the two sides in the length direction is realized, and the space in the length direction of the battery unit can be fully utilized.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, specifically to a battery module with dual-sided tabs. Background Technology

[0002] Existing dual-sided tab batteries can be stacked in a single row to form an independent module, with the current collected in series and parallel via busbars on both sides, before being connected to another independent module. However, necessary electrical and assembly clearances still need to be maintained between modules, thus failing to fully utilize the space along the length of the battery.

[0003] For example, Chinese patent document CN114024081A discloses a power battery including a battery assembly and a bus assembly. The battery assembly includes multiple cells arranged in an array, with the terminals of each cell located at both ends. It can be seen that the cells of this power battery are stacked in a single row, resulting in a larger bus area and higher cost. For current dual-sided tab batteries, achieving dual-row or multi-row stacking requires more space to accommodate a larger bus area, leading to wasted space and increased cost. Utility Model Content

[0004] The purpose of this invention is to provide a dual-sided tab battery module, which solves the problem of space waste and increased cost caused by the need for more space to accommodate a larger busbar when dual-sided tab batteries are stacked in two or more rows in the prior art.

[0005] To achieve the above objectives, this utility model provides a dual-sided tab battery module, comprising at least a first module and a second module, both of which include a plurality of battery cells arranged in an array. Tabs are provided on opposite sides of each battery cell along its length. The first module and the second module are spaced apart along the length of the battery cells and connected by a central busbar. A first busbar is provided on one side of the first module relative to the central busbar, and a second busbar is provided on one side of the second module relative to the central busbar. The first busbar and the second busbar respectively connect the battery cells of the first module and the second module.

[0006] Connecting the first module and the second module through an intermediate busbar realizes the double-row stacking of the double-sided tabbed battery in its length direction, and multi-row stacking can be achieved under the condition of adding an intermediate busbar. At the same time, setting the first busbar and the second busbar on the first module and the second module can achieve the convergence of battery cells. Moreover, the first busbar, the second busbar and the intermediate busbar are arranged in the length direction of the battery cell, and the three are independent structures. Each individual has a smaller area, which can make full use of the space in the length direction of the battery cell, saving space and cost compared with the busbar structure in the prior art.

[0007] Further, the intermediate busbar is in a "J" shape, including a first side, a second side and a top. The first side is connected to the first module, the second side is connected to the second module, and the top is flush with the top end of the battery cell.

[0008] The first side, the second side and the top can converge the first module and the second module. The top of the intermediate busbar is flush with the top end of the battery cell, which can conveniently provide an area for collecting voltage and temperature.

[0009] Further, the intermediate busbar includes a pre-fold line, which is arranged between the second side and the top. The intermediate busbar is bent into a "J" shape along the pre-fold line.

[0010] Through the pre-fold line, the intermediate busbar can be bent into a "J" shape. The second module can change its position as the intermediate busbar is bent, so that the first module and the second module are arranged along the length direction of the battery cell. Even if the gap between the first module and the second module after arrangement is very small, the intermediate busbar can be installed between the first module and the second module by means of the pre-fold line, reducing the installation difficulty.

[0011] Further, the first module includes two battery cells, and the width of the intermediate busbar is less than the sum of the widths of the two battery cells.

[0012] Through the above technical solution, there is a width difference between the intermediate busbar and the edges of the two battery cells. When the number of the first modules increases along the width direction of the battery cell, the number of the intermediate busbars increases accordingly, and sufficient electrical clearances can be formed between two adjacent intermediate busbars.

[0013] Further, a first protective plate is connected to the outside of the first busbar, and a second protective plate is connected to the outside of the second busbar.

[0014] The first protective plate and the second protective plate respectively play a role in protecting the first busbar and the second busbar. The first protective plate and the second protective plate respectively create a certain safety clearance between the first busbar, the second busbar and the battery cell, avoiding direct contact with the battery cell.

[0015] Furthermore, a plurality of first modules and second modules are arranged in the width direction of the battery cell. A single first module, a second module and an intermediate busbar constitute a middle module, and a spacer is arranged between adjacent middle modules.

[0016] Several first and second modules can increase the capacity of the battery module, and separators separate adjacent middle modules to reserve expansion space.

[0017] Furthermore, the partition covers the first module and the second module in the length and height directions, and the partition blocks adjacent intermediate busbars.

[0018] Through the above technical solutions, the separator has a sufficient area to block two adjacent intermediate busbars, reducing the risk of short circuits caused by collisions or compression of the battery pack.

[0019] Furthermore, the separator includes a U-shaped frame and an aerogel pad, with the U-shaped frame enclosing the aerogel pad. The thickness of the U-shaped frame is greater than the thickness of the aerogel pad, and the aerogel pad is centrally located within the U-shaped frame, forming a spatial gap between the aerogel pad and the battery cells of the middle module on both sides.

[0020] The space gap is also known as the breathing gap. After the battery cell undergoes cycle aging, it will expand on the large surface of the battery. The reserved breathing space can reduce the stress caused by the expansion and improve cycle life.

[0021] Furthermore, the outermost large surfaces of the first module and the second module are provided with a foam layer and an end plate, wherein the foam layer is disposed between the end plate and the large surface.

[0022] End plates prevent battery cells from directly contacting the outside environment at large areas, reducing the risk of damage and scratches. Foam provides insulation, minimizing heat exchange between the battery cells and the outside environment, thus improving the overall insulation performance of the battery module and enhancing temperature uniformity.

[0023] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0024] This utility model discloses a dual-sided tab battery module, which connects a first module and a second module via a central busbar, enabling dual-row stacking of dual-sided tab batteries. With the addition of a central busbar, multi-row stacking can be achieved. Furthermore, the first and second busbars on the first and second modules allow for the convergence of battery cells. Since the first, second, and central busbars are positioned along the length of the battery cells, they fully utilize the space along the cell's length, saving space and cost compared to existing busbar structures.

[0025] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0026] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0027] Figure 1 This is a schematic diagram of the battery module structure in an embodiment of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the middle module in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the intermediate busbar before bending, according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the separated state structure of the first busbar, the second busbar, the first module, and the second module in an embodiment of this utility model;

[0031] Figure 5 This is a schematic diagram of the separator in the battery module in an embodiment of this utility model.

[0032] Description of Reference Numerals

[0033] 110. First module; 120. Second module; 130. Battery unit; 210. First busbar; 230. First protective plate; 240. Second busbar; 250. Second protective plate; 260. Middle busbar; 261. First side; 262. Second side; 263. Top; 264. Pre-crease; 300. Spacer; 310. U-shaped frame; 320. Aerogel pad; 330. Spacing; 400. End plate; 500. Foam layer. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0035] Example

[0036] Reference Figure 1-Figure 5 This embodiment provides a dual-sided tab battery module, including at least a first module 110 and a second module 120, both of which include a plurality of battery cells 130 arranged in a row. Tabs are provided on opposite sides of the length direction of each battery cell 130. The first module 110 and the second module 120 are spaced apart along the length direction of the battery cells 130 and are connected by an intermediate busbar 260. A first busbar 210 is provided on one side of the first module 110 opposite to the intermediate busbar 260, and a second busbar 240 is provided on one side of the second module 120 opposite to the intermediate busbar 260. The first busbar 210 and the second busbar 240 respectively connect the battery cells 130 of the first module 110 and the second module 120.

[0037] The first module 110 and the second module 120 are connected by the intermediate busbar 260, realizing the double-row stacking of the dual-sided tab batteries along their length. With the addition of the intermediate busbar 260, multi-row stacking can be achieved. Simultaneously, the first busbar 210 and the second busbar 240 on the first module 110 and the second module 120 enable the convergence of the battery cells 130. Furthermore, the first busbar 210, the second busbar 240, and the intermediate busbar 260 are arranged along the length of the battery cells 130, and each is an independent structure. Each busbar has a smaller area, making full use of the space along the length of the battery cells 130, saving space and cost compared to existing busbar structures.

[0038] Specifically, in some embodiments of this application, such as Figure 2 As shown, the intermediate busbar 260 is U-shaped, including a first side 261, a second side 262, and a top 263. The first side 261 is connected to the first module 110, the second side 262 is connected to the second module 120, and the top 263 is flush with the top of the battery unit 130. The first side 261, the second side 262, and the top 263 can connect the first module 110 and the second module 120 to achieve current conduction and convergence. The top 263 being flush with the top of the battery unit 130 provides a convenient area for collecting voltage and temperature data.

[0039] It is understandable that the initial structural design of the intermediate busbar 260 can take many forms. Depending on the suitability of the equipment and operating procedures, more shapes can be designed, such as straight lines and V-shapes. In some embodiments of this application, such as... Figure 3 As shown, the intermediate busbar 260 is L-shaped and includes a pre-fold 264 located between the second side 262 and the top 263. The intermediate busbar 260 is bent into a "U" shape along the pre-fold 264. When bending the L-shaped intermediate busbar 260, the second module 120 can change position as the intermediate busbar 260 is bent, so that the first module 110 and the second module 120 are arranged along the length of the battery unit 130. Even if the gap between the first module 110 and the second module 120 is very small, the intermediate busbar 260 can still be installed between the first module 110 and the second module 120 using the pre-fold 264 method, reducing the installation difficulty.

[0040] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first module 110 includes two battery cells 130, and the width of the intermediate bus 260 is less than the sum of the widths of the two battery cells 130. There is a width difference between the intermediate bus 260 and the edges of the two battery cells 130. As the number of the first module 110 increases along the width direction of the battery cells 130, the number of intermediate buses 260 increases accordingly, thus creating sufficient electrical clearances between adjacent intermediate buses 260. It should be noted that the number of battery cells 130 in the first module 110 can also be two or more, such as three, four, or even more. This embodiment uses two as an example.

[0041] Furthermore, such as Figure 1 and Figure 4 As shown, a first protective plate 230 is connected to the outer side of the first busbar 210, and a second protective plate 250 is connected to the outer side of the second busbar 240. The first protective plate 230 and the second protective plate 250 respectively protect the first busbar 210 and the second busbar 240. More importantly, the first protective plate 230 and the second protective plate 250 respectively create a certain safety gap between the first busbar 210, the second busbar 240 and the battery cell 130, avoiding direct contact with the battery cell 130.

[0042] In some embodiments of this application, such as Figure 1 and Figure 4As shown, a plurality of first modules 110 and second modules 120 are arranged in the width direction of the battery cell 130. A single first module 110, a second module 120, and an intermediate busbar 260 constitute a middle module, and a spacer 300 is arranged between adjacent middle modules. Multiple first modules 110 and second modules 120 can increase the total capacity of the battery module, and the spacer 300 can separate adjacent middle modules to reserve expansion space. It should be noted that in this embodiment, both the first module 110 and the second module 120 include two battery cells 130, that is, a single middle module includes four battery cells 130.

[0043] Furthermore, the separator 300 covers the first module 110 and the second module 120 in both length and height directions, and blocks adjacent intermediate busbars 260. The separator 300 has sufficient area to block two adjacent intermediate busbars 260, preventing them from contacting each other in case of accident, and reducing the risk of short circuits caused by collisions or compression of the battery pack. Specifically, the separator 300 includes a U-shaped frame 310 and an aerogel pad 320, with the U-shaped frame 310 enclosing the aerogel pad 320. The thickness of the U-shaped frame 310 is greater than the thickness of the aerogel pad 320, and the aerogel pad 320 is centrally located within the U-shaped frame 310, forming a spatial gap 330 between the aerogel pad 320 and the battery cells 130 of the intermediate modules on both sides. The spatial gap 330 is the breathing gap; after the battery cells 130 undergo cycle aging, they will expand on the large surface of the battery. The reserved breathing gap can reduce the stress generated by the expansion and improve cycle life.

[0044] It is understood that in some embodiments of this application, reference is made to... Figure 5 In the first module 110 and the second module 120, the outermost battery unit 130 has a foam layer 500 and an end plate 400 on its large surface. The foam layer 500 is positioned between the end plate 400 and the large surface. The end plate 400 prevents the battery unit 130 from directly contacting the outside environment at its large surface, reducing the risk of damage or scratches to the battery unit 130. The foam layer 500 provides insulation, reducing heat exchange between the battery unit 130 and the outside environment, improving the overall insulation performance of the battery module and enhancing the temperature uniformity of the battery module.

[0045] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A battery module with dual-sided tabs, comprising at least a first module (110) and a second module (120), both comprising a plurality of battery cells (130) arranged in a plurality of rows, wherein tabs are provided on opposite sides of each battery cell (130) along its length; characterized in that, The first module (110) and the second module (120) are arranged at intervals along the length direction of the battery cell (130), and are connected by an intermediate bus bar (260) therebetween; on one side of the first module (110) relative to the intermediate bus bar (260), a first bus bar (210) is provided, and on one side of the second module (120) relative to the intermediate bus bar (260), a second bus bar (240) is provided; the first bus bar (210) and the second bus bar (240) respectively collect the current of the battery cells (130) of the first module (110) and the second module (120).

2. A dual-sided tab battery module according to claim 1, characterized in that, The intermediate bus bar (260) is in a "U" shape, including a first side portion (261), a second side portion (262) and a top portion (263), the first side portion (261) is connected to the first module (110), the second side portion (262) is connected to the second module (120), and the top portion (263) is flush with the top end of the battery cell (130).

3. A dual-sided tab battery module according to claim 2, characterized in that, The intermediate bus bar (260) includes a pre-fold line (264), the pre-fold line (264) is provided between the second side portion (262) and the top portion (263), and the intermediate bus bar (260) is bent into a "U" shape along the pre-fold line (264).

4. A dual-sided tab battery module according to claim 2, characterized in that, The first module (110) includes two battery cells (130), and the width of the intermediate bus bar (260) is smaller than the sum of the widths of the two battery cells (130).

5. A dual-sided tab battery module according to claim 1, characterized in that, A first protective plate (230) is connected to the outside of the first bus bar (210), and a second protective plate (250) is connected to the outside of the second bus bar (240).

6. A dual-sided tab battery module according to claim 1, characterized in that, A plurality of the first modules (110) and the second modules (120) are arranged in the width direction of the battery cell (130), and a single first module (110), a second module (120) and an intermediate bus bar (260) form a middle module, and a spacer (300) is provided between adjacent middle modules.

7. A dual-sided tab battery module according to claim 6, characterized in that, The spacer (300) covers the first module (110) and the second module (120) in the length and height directions, and the spacer (300) blocks adjacent intermediate bus bars (260).

8. A dual-sided tab battery module according to claim 6, characterized in that, The spacer (300) includes a loop frame (310) and an aerogel pad (320), and the loop frame (310) wraps the aerogel pad (320).

9. A dual-sided tab battery module according to claim 8, characterized in that, The thickness of the loop frame (310) is greater than the thickness of the aerogel pad (320) and the aerogel pad (320) is arranged in the middle of the loop frame (310), and a space gap (330) is formed between the aerogel pad (320) and the battery cells (130) of the middle modules on both sides.

10. A dual-sided tab battery module according to claim 1, characterized in that, A foam layer (500) and an end plate (400) are provided on the large surface of the outermost battery cell (130) of the first module (110) and the second module (120), and the foam layer (500) is provided between the end plate (400) and the large surface.

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