Battery cell module and battery pack

Abstract

The utility model provides a battery cell module and a battery pack, the battery cell module comprises a battery cell body, a pole protection cover and a busbar, and the battery cell body is convexly provided with a pole; the pole protection cover covers the pole, the pole protection cover comprises two opposite side walls, and the side walls are provided with first clamping structures; the busbar is connected with the battery cell body, at least part of the busbar is arranged between the two side walls, the busbar is provided with second clamping structures at intervals, and each second clamping structure is clamped to one first clamping structure. The first clamping structure and the second clamping structure are arranged in the side wall of the pole protection cover, so that the busbar can be completely fixed through the structures, the part, protruding out of the battery cell body, of the pole can be well attached to the busbar, the undesirable phenomena such as pseudo soldering caused by abnormal contact between the busbar and the pole are reduced, and the power supply efficiency of the battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery core module and a battery pack. Background Art

[0002] To further solve the problem of energy volatility, it is necessary to integrate battery energy storage technology into grid optimization, effectively improve battery usage and reduce power supply costs.

[0003] However, in the related art, contact anomalies are easily generated during the installation of the poles and the busbars, resulting in poor solder joints and other undesirable phenomena in the battery, thereby reducing the power supply efficiency of the battery. Utility Model Content

[0004] The embodiments of the utility model provide a battery cell module and a battery pack, which can improve the technical problem of abnormal contact between a bus bar and a pole.

[0005] An embodiment of the utility model provides a battery cell module, comprising:

[0006] A battery cell body, wherein the battery cell body is provided with a pole;

[0007] A pole protection cover, which is arranged on the pole, and the pole protection cover is provided with two opposite side walls, and a first clamping structure is provided on a side of each side wall facing the other side wall;

[0008] The bus bar is connected to the battery cell body and is at least partially disposed between the two side walls. The bus bar is provided with two second clamping structures at intervals, and each of the second clamping structures is clamped to a first clamping structure.

[0009] One of the first clamping structure and the second clamping structure is a clamping hook, and the other is an opening, and the clamping hook is arranged in the opening.

[0010] In some embodiments, the first clamping structure is a clamping hook, and the second clamping structure is an opening. Each of the clamping hooks includes an elastic connecting arm and a stopper, one end of the elastic connecting arm is connected to the side wall, and the other end of the elastic connecting arm is connected to the stopper, the elastic connecting arm is passed through the opening, and the stopper abuts against a side of the busbar away from the battery body.

[0011] In some embodiments, the pole protection cover further includes two top walls, the top walls are arranged on a side of the busbar away from the battery cell body, and each top wall is connected to one of the side walls;

[0012] One of the top walls is provided with a buckle, and the other top wall is provided with a buckle hole, and the buckle is correspondingly buckled in the buckle hole to connect the two top walls.

[0013] In some embodiments, the thickness at the connection between each of the top walls and the side walls is less than the thickness of the top wall and less than the thickness of the side walls.

[0014] In some embodiments, the pole protection cover includes an outer surface facing away from the bus bar, and a mica sheet coating is provided on the outer surface.

[0015] This application also provides a battery pack, including:

[0016] The battery cell module as described above;

[0017] A box body, the box body forms an accommodation chamber, and the battery cell module is arranged in the box body.

[0018] In some embodiments, the box body includes two end plates arranged opposite to each other. Each end plate includes a first limiting structure facing the battery cell module. The battery pack further includes two second limiting structures. One of the second limiting structures is arranged at each end of the battery cell module facing the end plate. The first limiting structure is correspondingly installed on the second limiting structure to limit the movement of the battery cell module.

[0019] In some embodiments, the first limiting structure includes a first rib and a second rib arranged at intervals. The second limiting structure includes a third rib and a fourth rib arranged at intervals. The third rib and the fourth rib are installed between the first rib and the second rib, and the first rib abuts against the third rib, and the second rib abuts against the fourth rib.

[0020] In some embodiments, the box body includes a box cover, and the box cover is provided with hexagonal reinforcing ribs.

[0021] Advantages of the embodiments of the present utility model:

[0022] In the embodiments of the present utility model, the battery cell module includes a battery cell body, a pole protection cover and a bus bar. The battery cell body protrudes with a pole; the pole protection cover covers the pole. The pole protection cover is provided with two opposite side walls. On one side of each side wall facing the other side wall, a first clamping structure is provided; the bus bar is connected to the battery cell body and at least partially arranged between the two side walls. Two second clamping structures are arranged at intervals on the bus bar, and each second clamping structure is clamped to a first clamping structure. By arranging the first clamping structure and the second clamping structure inside the side walls of the pole protection cover, the bus bar can be completely fixed through this structure, so as to ensure that the part of the pole protruding from the battery cell body can be in good fit with the bus bar, reduce bad phenomena such as false soldering caused by abnormal contact between the bus bar and the pole, and ensure the battery power supply efficiency. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural view of a battery cell module provided by an embodiment of the present utility model Figure 1 。

[0025] Figure 2 is a cross-sectional view of a battery cell module provided by an embodiment of the present utility model.

[0026] Figure 3 is a schematic structural view of a battery cell module provided by an embodiment of the present utility model Figure 2 。

[0027] Figure 4 is a schematic structural view of a battery cell module provided by an embodiment of the present utility model Figure 3 。

[0028] Figure 5 is a schematic structural view of a battery cell body provided by an embodiment of the present utility model Figure 1 。

[0029] Figure 6 is a schematic structural view of a battery cell body provided by an embodiment of the present utility model Figure 2 。

[0030] Figure 7 is an exploded view of a battery pack provided by an embodiment of the present utility model Figure 1 。

[0031] Figure 8 is an exploded view of a battery pack provided by an embodiment of the present utility model Figure 2 。

[0032] Figure 9 is a partial cross-sectional view of a battery pack provided by an embodiment of the present utility model.

[0033] Figure 10 is an exploded view of a battery pack provided by an embodiment of the present utility model Figure 3 。

[0034] Reference numerals:

[0035] 100, battery cell module;

[0036] 10, battery cell body;

[0037] 20. Pole protection cover; 21. First clamping structure; 211. Elastic connecting arm; 212. Stopping part; 22. Side wall; 23. Top wall; 231. Buckle; 232. Card hole;

[0038] 30. Busbar; 31. Second clamping structure; 32. Pole; 33. Depression;

[0039] 200. Battery cell module; 201. Box body; 2011. Accommodation chamber; 202. End plate; 2021. First limiting structure; 2022. First rib; 2023. Second rib; 2024. Second limiting structure; 2025. Third rib; 2026. Fourth rib; 203. Box cover; 2031. Reinforcing rib. Detailed implementation manners

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0041] As China continues to promote the structural reform of the energy supply side and the transformation of energy development from extensive to high-quality development, in order to further solve the problem of energy volatility, it is necessary to integrate battery energy storage technology into power grid optimization to effectively improve the use effect of batteries and reduce the power supply cost. However, in related technologies, abnormal contact is likely to occur during the installation of the pole 32 and the busbar, resulting in poor phenomena such as virtual soldering of the battery, reducing the power supply efficiency of the battery.

[0042] Please refer to Figures 1 - 3 , Figure 1 which is the structural schematic diagram of the battery cell module provided by the embodiment of the present invention Figure 1 , Figure 2 which is the cross-sectional view of the battery cell module provided by the embodiment of the present invention, Figure 3 which is the structural schematic diagram of the battery cell module provided by the embodiment of the present invention Figure 2 .

[0043] The present application provides a battery cell module 100. The battery cell module includes a battery cell body 10, a pole protection cover 20, and a bus bar 30. A pole 32 protrudes from the battery cell body 10, and the pole protection cover 20 covers the pole 32. The pole protection cover 20 has two opposite side walls 22, and a first clamping structure 21 is provided on one side of each side wall 22 facing the other side wall 22. The bus bar 30 is connected to the battery cell body 10 and is at least partially disposed between the two side walls 22. Two second clamping structures 31 are spaced apart on the bus bar 30, and each second clamping structure 31 is clamped to a first clamping structure 21.

[0044] Specifically, the battery cell module 100 includes a plurality of battery cell bodies 10 arranged in an array. Each battery cell body 10 includes two poles 32, and the bus bar 30 is connected to the poles 32 to electrically connect two adjacent battery cell bodies 10. Part of the bus bar 30 is disposed between the two side walls 22 of one battery cell, and part of the bus bar 30 extends and is disposed between the two side walls 22 of another battery cell.

[0045] It can be understood that by providing a clamping structure inside the side wall 22, pre-positioning of the installation of the bus bar 30 can be formed, so that the bus bar 30 can be fixed between the side walls 22 through this structure, ensuring that the part of the pole 32 protruding from the battery cell body can fit well with the bus bar 30, and achieving limit positioning of the bus bar 30 in the height direction, reducing defective phenomena such as false soldering caused by abnormal contact between the bus bar 30 and the pole 32, and ensuring the battery power supply efficiency.

[0046] In some embodiments, one of the first clamping structure 21 and the second clamping structure 31 is a hook, and the other is an opening, and the hook is disposed inside the opening.

[0047] In some embodiments, the first clamping structure 21 is an opening, the second clamping structure 31 is a hook, and the hook is disposed inside the opening to fix the bus bar 30 to the side wall 22.

[0048] In some embodiments, the first clamping structure 21 is a hook, the first clamping structure 21 is provided with a first holding portion facing the second clamping structure 31, the second clamping structure 31 is also a hook, and the second clamping structure 31 is provided with a second holding portion facing the first clamping structure 21, and the two holding portions are hooked to each other to fix the bus bar 30 to the side wall 22.

[0049] In some embodiments, the first clamping structure 21 is a hook, and the second clamping structure 31 is an opening. The hook is correspondingly clamped to the opening to install the bus bar 30 between the side walls 22.

[0050] Specifically, in some embodiments, each of the hooks includes an elastic connecting arm 211 and a stop portion 212. One end of the elastic connecting arm 211 is connected to the side wall 22, and the other end of the elastic connecting arm 211 is connected to the stop portion 212. The elastic connecting arm 211 penetrates through the opening in a direction away from the battery cell body 10, and the stop portion 212 abuts against a surface of the bus bar 30 facing away from the battery cell body 10.

[0051] Specifically, the stop portion 212 includes a guiding surface and a stopping surface. When the elastic connecting arm 211 penetrates through the opening, the guiding surface moves along the edge of the opening, and the stop portion 212 undergoes a certain deformation so that the stop portion 212 can penetrate through the opening. When the stop portion 212 returns to its original position, the stopping surface abuts against a surface of the bus bar 30 facing away from the battery cell body 10, preventing the stop portion 212 from disengaging from the opening again.

[0052] Please refer to Figures 4 - 6 , Figure 4 which is a schematic structural view of the battery cell module provided by the embodiment of the present utility model Figure 3 , Figure 5 which is a schematic structural view of the battery cell body provided by the embodiment of the present utility model Figure 1 , Figure 6 which is a schematic structural view of the battery cell body provided by the embodiment of the present utility model Figure 2 .

[0053] The pole protection cover 20 further includes two top walls 23. The top walls 23 are disposed on a side of the bus bar 30 facing away from the battery cell body 10, and each top wall 23 is connected to one of the side walls 22. One of the top walls 23 is provided with a buckle 231, and the other top wall 23 is provided with a buckle hole 232. The buckle 231 is correspondingly snapped into the buckle hole 232 to connect the two top walls 23.

[0054] In some examples, the side wall 22 includes a left side portion and a right side portion. The left side portion is connected to the left top portion, the right side portion is connected to the right top portion, the left top portion is stacked on the right top portion, the left top portion is provided with a buckle 231, and the right top portion is provided with a buckle hole 232. The buckle 231 protrudes downward and is snapped into the buckle hole 232.

[0055] In some examples, the side wall 22 includes a left side portion and a right side portion. The left side portion is connected to the left top portion, the right side portion is connected to the right top portion, the left top portion is stacked on the right top portion, a surface of the left top portion facing the right top portion is provided with a buckle hole 232, the right top portion is provided with a buckle 231, and the buckle 231 protrudes upward and is snapped into the buckle hole 232.

[0056] In some examples, the right top portion is stacked on the left top portion, a surface of the left top portion facing the right top portion is provided with a buckle hole 232, the right top portion is provided with a buckle 231, and the buckle 231 protrudes downward and is snapped into the buckle hole 232.

[0057] In some examples, the right top part is stacked on the left top part. A buckle 231 is provided on the surface of the left top part facing the right top part, and a card hole 232 is provided on the right top part. The buckle 231 protrudes upward and is buckled into the card hole 232.

[0058] In some examples, the side wall 22 includes a left side part and a right side part. The left side part is connected to the left top part, and the right side part is connected to the right top part. The left top part and the right top part are located in the same plane. A buckle 231 protrudes from the side surface of the left top part facing the right top part, and a card hole 232 is provided on the right top part. The buckle 231 protrudes rightward and is buckled into the card hole 232.

[0059] In some examples, a buckle 231 protrudes from the side surface of the right top part facing the left top part, and a card hole 232 is provided on the left top part. The buckle 231 protrudes leftward and is buckled into the card hole 232.

[0060] It can be understood that in the related art, through the locking screw assembly structure or the cell BSB welding process, an additional PC cover is added for insulation protection after the cells are assembled, and a special fixture is required for auxiliary processing during laser welding. However, this process is likely to cause the back glue to age and fall off or the adhesion of the back glue to be insufficient after the cells are grouped, resulting in insufficient insulation protection. In this application, the buckle 231 and the card hole 232 are buckled, which can increase the structural stability, make the side wall 22 of the pole protection cover 20 tightly buckled, and form insulation protection for the conductive parts of the pole 32 such as wire harnesses and busbars. In addition, the buckling structure is convenient to install, and it is convenient to disassemble and assemble the pole protection cover 20.

[0061] In some embodiments, the thickness of the connection between each of the top walls 23 and the side walls 22 is less than the thickness of the top wall 23 and less than the thickness of the side wall 22.

[0062] It should be noted that the side wall 22 and the top wall 23 are the same plate body before processing, that is, the side wall 22 and the top wall 23 have the same thickness. In order to make part of the side wall 22 bend to form the top wall 23, it is necessary to perform a thinning treatment on a local part of the plate body, that is, a depression 33 is provided at the position where bending is to be performed, so that the plate body is more ductile, and this property is used to perform bending at the thinned part.

[0063] Specifically, the side wall 22 includes a left side part and a right side part. The left side part includes a left side surface facing the busbar 30, and the left top part includes a left top surface facing the busbar 30. A depression 33 is formed at the connection between the left side surface and the left top surface. The right side part includes a right side surface facing the busbar 30, and the right top part includes a right top surface facing the busbar 30. A depression 33 is formed at the connection between the right side surface and the right top surface.

[0064] In some embodiments, the pole protection cover 20 includes an outer surface facing away from the busbar 30, and a mica sheet coating is provided on the outer surface.

[0065] It can be understood that the outer surface includes the entire outer surface of the two side walls 22 and the two top walls 23. A layer of mica sheet is coated on the outside of the pole column protection cover 20. The mica sheet has good heat insulation performance and can increase the heat resistance of the product. When abnormal conditions such as thermal runaway occur in the product, it can prevent high-temperature electrolyte from splashing into the inside of the pole column protection cover 20, and will not affect the opening of the explosion-proof valve, improving the safety and reliability of the product.

[0066] Please refer to Figures 7 - 9 , Figure 7 is the explosion schematic of the battery pack provided by the embodiment of the present invention Figure 1 , Figure 8 is the explosion schematic of the battery pack provided by the embodiment of the present invention Figure 2 , Figure 9 is a partial cross-sectional view of the battery pack provided by the embodiment of the present invention.

[0067] This application also provides a battery pack 200, which includes the aforementioned battery cell module 100 and a box body 201. The box body 201 forms an accommodation chamber 2011, and the battery cell module 100 is arranged inside the box body 201.

[0068] In some embodiments, the box body 201 includes two end plates 202 arranged oppositely. Each end plate 202 includes a first limiting structure 2021 facing the battery cell module 100. The battery pack 200 further includes two second limiting structures 2024. One of the second limiting structures 2024 is arranged at each end of the battery cell module 100 facing the end plate 202, and the first limiting structure 2021 is correspondingly installed on the second limiting structure 2024 to limit the movement of the battery cell module 100.

[0069] It can be understood that in this application, the end plate 202 does not have a fastener structure connected to the box body 201. After the battery cell bodies are grouped according to the required series and parallel numbers in the series-parallel mode, the end plates 202 are placed on both sides. Canceling the fasteners can simplify the structure of the end plate 202. When the battery cell bodies generate expansion force, the end plate 202 can be limited from both sides, avoiding the risk of fatigue failure of the fasteners after long-term use.

[0070] In addition, the end plate 202 does not need to reserve fastener holes, which can reduce the length of the module, reduce the overall floor area of the battery pack 200, and is also convenient for cabinet selection in practical applications.

[0071] In some embodiments, the first limiting structure 2021 includes a first rib 2022 and a second rib 2023 that are spaced apart. The first rib 2022 and the second rib 2023 are arranged in the horizontal direction. The second limiting structure 2024 includes a third rib 2025 and a fourth rib 2026 that are spaced apart. The third rib 2025 and the fourth rib 2026 are installed between the first rib 2022 and the second rib 2023, and the first rib 2022 abuts against the third rib 2025, and the second rib 2023 abuts against the fourth rib 2026.

[0072] It can be understood that by setting the first rib 2022 to abut against the third rib 2025 and the second rib 2023 to abut against the fourth rib 2026, the cell module 100 can be limited in the height direction of the box body 201.

[0073] In some embodiments, the first limiting structure 2021 includes a fifth rib and a sixth rib that are spaced apart. The fifth rib and the sixth rib are arranged in the vertical direction. The first rib 2022, the second rib 2023, the fifth rib, and the sixth rib form a frame structure. The second limiting structure 2024 includes a seventh rib and an eighth rib that are spaced apart. The seventh rib and the eighth rib are arranged in the vertical direction. The third rib 2025, the fourth rib 2026, the seventh rib, and the eighth rib form a frame structure. The seventh rib and the eighth rib are installed between the first rib 2022 and the second rib 2023, and the fifth rib abuts against the seventh rib, and the sixth rib abuts against the eighth rib.

[0074] It can be understood that by setting the fifth rib to abut against the seventh rib and the sixth rib to abut against the eighth rib, the cell module 100 can be limited in the width direction of the box body 201.

[0075] Specifically, the first limiting structure 2021 and the second limiting structure 2024 form a loop structure to limit the displacement of the cell module 100. The protruding length of the second limiting structure 2024 needs to be greater than the depth of the groove formed by the first limiting structure 2021, so that the second limiting structure 2024 can completely abut against the inside of the groove to prevent the cell module from shifting.

[0076] Please refer to Figure 10 , Figure 10 which is the exploded view of the battery pack provided by the embodiments of the present invention. Figure 3 . In some embodiments, the box body 201 includes a box cover 203, and the box cover 203 is provided with hexagonal reinforcing ribs 2031.

[0077] Specifically, the hexagonal reinforcing rib 2031 is disposed on the side of the lid 203 facing away from the battery cell module 100. The lid 203 is partially provided with the hexagonal reinforcing rib 2031. The hexagonal structure has relatively high strength. Through the matrix hexagonal structure, the mechanical strength of the lid 203 can be enhanced, and the pressure-bearing capacity of the lid 203 can be increased.

[0078] The embodiments of the present invention have been described in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A battery cell module, characterized in that: include: A battery cell body, wherein the battery cell body is provided with a pole; A pole protection cover, which is arranged on the pole, and the pole protection cover is provided with two opposite side walls, and a first clamping structure is provided on a side of each side wall facing the other side wall; The bus bar is connected to the battery cell body and is at least partially disposed between the two side walls. The bus bar is provided with two second clamping structures at intervals, and each of the second clamping structures is clamped to one of the first clamping structures.

2. The battery cell module according to claim 1, characterized in that: One of the first clamping structure and the second clamping structure is a clamping hook, and the other is an opening, and the clamping hook is arranged in the opening.

3. The battery cell module according to claim 2, characterized in that: The first clamping structure is a clamping hook, and the second clamping structure is an opening. Each of the clamping hooks includes an elastic connecting arm and a stopper. One end of the elastic connecting arm is connected to the side wall, and the other end of the elastic connecting arm is connected to the stopper. The elastic connecting arm is passed through the opening, and the stopper abuts against a side of the busbar that is away from the battery cell body.

4. A battery cell module according to any one of claims 1 to 3, characterized in that: The pole protection cover also includes two top walls, which are arranged on a side of the busbar away from the battery body, and each top wall is connected to one of the side walls; One of the top walls is provided with a buckle, and the other top wall is provided with a buckle hole, and the buckle is correspondingly buckled in the buckle hole to connect the two top walls.

5. A battery cell module according to claim 4, characterized in that: The thickness of the connection between each of the top wall and the side wall is smaller than the thickness of the top wall and smaller than the thickness of the side wall.

6. A battery cell module according to any one of claims 1 to 3, characterized in that: The pole protection cover comprises an outer surface facing away from the busbar, and the outer surface is provided with a mica sheet coating.

7. A battery pack, characterized in that: include: The battery cell module according to any one of claims 1 to 6; A box body is formed to form a containing chamber, and the battery cell module is arranged in the box body.

8. A battery pack according to claim 7, characterized in that: The box body includes two end plates arranged opposite to each other, each of the end plates includes a first limiting structure facing the battery cell module, and the battery pack also includes two second limiting structures. The two ends of the battery cell module are respectively provided with a second limiting structure facing the end plate, and the first limiting structure is correspondingly installed on the second limiting structure to limit the movement of the battery cell module.

9. A battery pack according to claim 8, characterized in that: The first limiting structure includes a first convex rib and a second convex rib arranged at intervals, and the second limiting structure includes a third convex rib and a fourth convex rib arranged at intervals, the third convex rib and the fourth convex rib are installed between the first convex rib and the second convex rib, and the first convex rib abuts against the third convex rib, and the second convex rib abuts against the fourth convex rib.

10. A battery pack according to claim 7, characterized in that: The box body comprises a box cover, and the box cover is provided with hexagonal reinforcing ribs.

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