A CCS assembly and a battery module

Abstract

This utility model relates to the field of battery technology, and more particularly to a CCS module and battery assembly. The CCS module provided by this utility model includes a bracket, a busbar, and an elastic seal. The bracket has a first clearance hole. The busbar is fixed to the side of the bracket away from the cell terminal and covers the first clearance hole. The busbar is used for vacuum welding connection with the cell terminal. The elastic seal is fixed to the side of the bracket near the cell terminal and covers the first clearance hole. The elastic seal abuts against the cell boss. The elastic seal has a second clearance hole surrounding the outer periphery of the cell terminal. The CCS module provided by this utility model allows the vacuum pump to properly extract air from the welding area of ​​the busbar, ensuring that the welding area of ​​the busbar is in a vacuum environment when vacuum welding the busbar to the cell terminal, thus improving the welding quality between the busbar and the cell terminal.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a CCS component and battery module. Background Technology

[0002] In existing technologies, CCS modules include a support frame and a busbar mounted on the support frame. The busbar needs to be electrically connected to the battery cell terminals using vacuum welding. To ensure the welding quality between the busbar and the battery cell terminals, the welding area of ​​the busbar needs to be in a vacuum environment. In related technologies, a clamping cover is used to press the busbar onto the battery cell terminals, and then a vacuum pump is used to remove the air from the clamping cover, creating a vacuum environment in the welding area of ​​the busbar for vacuum welding. However, in existing CCS modules, a gap always exists between the busbar and the battery cell terminals, which prevents the vacuum pump from creating a proper vacuum environment in the welding area of ​​the busbar, significantly reducing the welding quality.

[0003] Therefore, there is an urgent need for a CCS component and battery module to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a CCS module and battery module to ensure that the welding area of ​​the busbar is in a vacuum environment, thereby improving the welding quality between the busbar and the cell terminal.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A CCS (Cellular Cell Component) module, wherein a cell terminal post is protruding from a cell boss of the cell, the CCS module comprising:

[0007] The bracket has a first clearance hole.

[0008] A busbar is fixed to the side of the bracket away from the cell terminal and covers the first clearance hole. The busbar is used for vacuum welding connection with the cell terminal.

[0009] An elastic seal is fixed to the side of the bracket near the cell electrode post, and the elastic seal covers the first clearance hole. The elastic seal abuts against the cell boss. A second clearance hole is provided on the elastic seal, and the second clearance hole surrounds the outer periphery of the cell electrode post.

[0010] As an optional solution, the elastic seal is a rubber gasket or a sponge gasket.

[0011] As an optional solution, the radius of the second clearance hole is larger than the radius of the cell electrode post, and the difference ΔR between the radius of the second clearance hole and the radius of the cell electrode post is 2mm to 5mm.

[0012] Alternatively, the center of the second clearance hole is directly opposite the center of the cell electrode post.

[0013] As an optional solution, when the elastic seal is in its natural state, the height of the elastic seal is h greater than the height of the battery cell electrode post, where h is 0.2mm to 0.6mm.

[0014] As an alternative, the center of the first clearance hole is directly opposite the center of the cell electrode post.

[0015] As an option, the first clearance hole can be a circular hole or a square hole;

[0016] And / or, the second clearance hole is a circular hole or a square hole.

[0017] As an optional solution, the busbar is attached and fixed to the side of the bracket away from the battery cell terminal;

[0018] And / or, the elastic seal is adhered and fixed to the side of the bracket near the cell terminal.

[0019] Alternatively, the busbar can be made of aluminum.

[0020] A battery module includes multiple battery cells and a CCS assembly as described above, wherein each battery cell includes a cell terminal and the cell terminal is vacuum welded to the busbar.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a CCS assembly, which includes a bracket, a busbar, and an elastic seal. The bracket has a first clearance hole, the busbar is fixed to the side of the bracket away from the cell terminal and covers the first clearance hole, and the busbar is used for vacuum welding connection with the cell terminal. The elastic seal is fixed to the side of the bracket near the cell terminal and covers the first clearance hole. The elastic seal abuts against the cell boss, and the elastic seal has a second clearance hole surrounding the outer periphery of the cell terminal. The CCS assembly provided by this utility model, by setting an elastic seal between the bracket and the cell boss, allows the busbar to be pressed against the cell terminal by the clamping cover when it is pressed on the busbar, passing through the first and second clearance holes in sequence. The elastic seal, the cell boss, the busbar, and the cell terminal form a sealed space that communicates with the clamping cover. This allows the vacuum pump to normally extract air from the welding area of ​​the busbar through the clamping cover, ensuring that the welding area of ​​the busbar is in a vacuum environment when the busbar and the cell terminal are connected by vacuum welding, thus improving the welding quality of the busbar and the cell terminal.

[0023] This utility model also provides a battery module that, by applying the aforementioned CCS component, ensures that the welding area of ​​the busbar is in a vacuum environment, thereby improving the welding quality between the busbar and the cell terminal. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the CCS component provided in this embodiment of the utility model;

[0025] Figure 2 This is an exploded view of the CCS component provided in this embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0027] Figure 4 This is an exploded view of the battery module provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the battery cell structure provided in an embodiment of the present invention;

[0029] Figure 6 This is a structural cross-sectional view of the battery module provided in this embodiment of the utility model;

[0030] Figure 7 yes Figure 6 Enlarged view of the structure at point A in the middle;

[0031] Figure 8This is a partial cross-sectional view of the battery module provided in this embodiment of the present invention when the clamping cover is pressed onto the busbar;

[0032] Figure 9 This is a partial structural cross-sectional view of the battery module provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 10. CCS module; 20. Battery cell; 201. Battery cell boss; 202. Battery cell terminal; 30. Compression cover;

[0035] 1. Bracket; 11. First clearance hole; 2. Busbar; 3. Elastic seal; 31. Second clearance hole. Detailed Implementation

[0036] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] In existing technologies, the busbars in CCS modules need to be electrically connected to the cell terminals using vacuum welding. To ensure the welding quality between the busbar and the cell terminals, the welding area of ​​the busbar needs to be in a vacuum environment. In related technologies, a clamping cover is used to press the busbar onto the cell terminal, and then a vacuum pump is used to remove air from the clamping cover, creating a vacuum environment in the welding area of ​​the busbar for vacuum welding. However, in existing CCS modules, a gap always exists between the busbar and the cell terminal, which prevents the vacuum pump from creating a proper vacuum environment in the welding area of ​​the busbar, significantly reducing the welding quality.

[0041] To solve the above problems, such as Figures 1 to 8 As shown, this embodiment provides a CCS assembly 10, which includes a bracket 1, a busbar 2, and an elastic seal 3. The bracket 1 has a first clearance hole 11. The busbar 2 is fixed to the side of the bracket 1 away from the cell electrode 202 and covers the first clearance hole 11. The busbar 2 is used for vacuum welding connection with the cell electrode 202. The elastic seal 3 is fixed to the side of the bracket 1 near the cell electrode 202 and covers the first clearance hole 11. The elastic seal 3 abuts against the cell boss 201. The elastic seal 3 has a second clearance hole 31 surrounding the outer periphery of the cell electrode 202. It should be noted that the cell boss 201 of the cell 20 has a protruding cell electrode 202. The CCS assembly 10 provided in this embodiment, by setting an elastic sealing element 3 between the bracket 1 and the cell boss 201, allows the busbar 2 to be pressed against the cell terminal 2 by the clamping cover 30 when it is pressed on the busbar 2. The clamping cover 30 allows the busbar 2 to pass through the first clearance hole 11 and the second clearance hole 31 in sequence and be pressed against the cell terminal 202. The elastic sealing element 3, the cell boss 201, the busbar 2 and the cell terminal 202 form a sealed space that communicates with the clamping cover 30. This allows the vacuum pump to normally extract air from the welding area of ​​the busbar 2 through the clamping cover 30, ensuring that the welding area of ​​the busbar 2 is in a vacuum environment when the busbar 2 and the cell terminal 202 are connected by vacuum welding, thereby improving the welding quality of the busbar 2 and the cell terminal 202.

[0042] Optionally, in this embodiment, the elastic seal 3 can be a rubber gasket or a sponge gasket. This embodiment does not limit the specific form of the elastic seal 3, as long as the elastic seal 3 has good elasticity, and the busbar 2 can compress the elastic seal 3 when the compression cover 30 is pressed onto the busbar 2, so that the busbar 2 and the elastic seal 3, and the battery cell boss 201 and the elastic seal 3 are all tightly fitted.

[0043] Optionally, in this embodiment, the busbar 2 is an aluminum busbar. Aluminum busbars have the advantage of good conductivity. Furthermore, aluminum busbars have good elasticity, ensuring that the busbar 2 can undergo slight deformation and sequentially pass through the first clearance hole 11 and the second clearance hole 31 to be pressed against the cell terminal 202.

[0044] Optionally, in this embodiment, the busbar 2 is attached and fixed to the side of the bracket 1 away from the battery cell terminal 202. By attaching and fixing the busbar 2 to the bracket 1, the connection method is simplified, and the stability and reliability of the fixation between the busbar 2 and the bracket 1 are ensured.

[0045] Optionally, in this embodiment, the elastic seal 3 is adhered and fixed to the side of the bracket 1 near the cell terminal 202. By adhering and fixing the elastic seal 3 to the bracket 1, the connection method is simplified, and the stability and reliability of the fixation between the elastic seal 3 and the bracket 1 are ensured.

[0046] Optionally, in this embodiment, the cell terminal 202 is circular. Optionally, the first clearance hole 11 is a square hole. In other embodiments, the first clearance hole 11 may also be a circular hole. The specific shape of the first clearance hole 11 can be set according to requirements. Optionally, in this embodiment, the second clearance hole 31 is a circular hole. In other embodiments, the second clearance hole 31 may also be a square hole, an elliptical hole, or other shapes.

[0047] Optionally, in this embodiment, the radius of the second clearance hole 31 is larger than the radius of the cell terminal 202, and the difference ΔR between the radius of the second clearance hole 31 and the radius of the cell terminal 202 is 2mm to 5mm. Specifically, the difference ΔR can be 2mm, 3mm, 4mm, or 5mm. Since there are certain tolerances in the cell terminals 202 of each cell 20 in the battery module, resulting in a certain positional deviation of each cell terminal 202, by making the radius of the second clearance hole 31 slightly larger than the radius of the cell terminal 202, the positional deviation of the cell terminal 202 is matched, ensuring that the second clearance hole 31 surrounds the outer periphery of the cell terminal 202, thus preventing the elastic seal 3 from pressing on the cell terminal 202. In addition, the above-mentioned values ​​also prevent the radius of the second clearance hole 31 from being too large relative to the radius of the cell electrode 202, reducing the space between the outer peripheral wall of the cell electrode 202 and the inner peripheral wall of the second clearance hole 31, making it easier for the vacuum pumping device to perform vacuuming operation on the welding area of ​​the busbar 2.

[0048] Optionally, in this embodiment, the center of the second clearance hole 31 is directly opposite the center of the cell electrode 202. This arrangement ensures that the space between the outer peripheral wall of the cell electrode 202 and the inner peripheral wall of the second clearance hole 31 is an annulus centered on the center of the cell electrode 202. This ensures that the vacuuming device can extract air more evenly during vacuuming operations and also facilitates the positioning of the elastic seal 3 on the bracket 1.

[0049] Optionally, in this embodiment, the center of the first clearance hole 11 is directly opposite the center of the cell electrode 202. This arrangement ensures that the first clearance hole 11 can more accurately and reliably avoid the cell electrode 202. It should be noted that the size of the first clearance hole 11 is larger than the size of the second clearance hole 31.

[0050] Optionally, in this embodiment, as Figure 9 As shown, when the elastic seal 3 is in its natural state, its height is higher than that of the battery cell terminal 202, thus ensuring that the busbar 2 effectively compresses the elastic seal 3 and maintains a tight seal between the busbar 2 and the elastic seal 3. Optionally, in this embodiment, when the elastic seal 3 is in its natural state, the height of the elastic seal 3 is h greater than the height of the battery cell terminal 202, where h is 0.2mm to 0.6mm. Specifically, h can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm. This limitation prevents the height of the elastic seal 3 from being significantly greater than that of the battery cell terminal 202, thus avoiding the busbar 2's inability to effectively compress the elastic seal 3 and prevent the busbar 2 from contacting the battery cell terminal 202. This ensures reliable contact between the busbar 2 and the battery cell terminal 202, as well as a tight fit between the busbar 2 and the elastic seal 3, improving the sealing effect. It should be noted that the elastic seal 3 being in its natural state means that the elastic seal 3 is in an uncompressed state.

[0051] like Figures 3-6 As shown, this embodiment also provides a battery module, which includes multiple battery cells 20 and the aforementioned CCS assembly 10. Each battery cell 20 includes a cell terminal 202, which is vacuum-welded to a busbar 2. The battery module provided in this embodiment, by applying the aforementioned CCS assembly 10, ensures that the welding area of ​​the busbar 2 is in a vacuum environment, thereby improving the welding quality between the busbar 2 and the cell terminal 202.

[0052] It should be noted that the bracket 1 is provided with a plurality of first clearance holes 11 spaced apart, each first clearance hole 11 is provided with an elastic sealing element 3, and each first clearance hole 11 is provided with a busbar 2. The busbar 2 is vacuum welded to the cell terminal 202 of the corresponding cell 20 to realize the series and / or parallel connection between the cells 20.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A CCS assembly, characterized by, The cell boss (201) of the cell (20) has a protruding cell terminal (202), and the CCS assembly includes: A bracket (1) is provided with a first clearance hole (11); Busbar (2), the busbar (2) is fixed to the side of the bracket (1) away from the cell terminal (202), and the busbar (2) covers the first clearance hole (11), the busbar (2) is used for vacuum welding connection with the cell terminal (202); An elastic seal (3) is fixed to the side of the bracket (1) near the cell electrode post (202), and the elastic seal (3) covers the first clearance hole (11). The elastic seal (3) abuts against the cell boss (201). A second clearance hole (31) is provided on the elastic seal (3), and the second clearance hole (31) surrounds the outer periphery of the cell electrode post (202).

2. The CCS assembly of claim 1, wherein, The elastic sealing element (3) is a rubber sealing gasket or a sponge sealing gasket.

3. The CCS assembly of claim 1, wherein, The radius of the second clearance hole (31) is larger than the radius of the cell electrode (202), and the difference ΔR between the radius of the second clearance hole (31) and the radius of the cell electrode (202) is 2mm to 5mm.

4. The CCS assembly of claim 3, wherein, The center of the second clearance hole (31) is directly opposite the center of the cell terminal (202).

5. The CCS component according to any one of claims 1 to 4, characterized in that, When the elastic seal (3) is in its natural state, the height of the elastic seal (3) is h greater than the height of the battery cell pole (202), and h is 0.2 mm to 0.6 mm.

6. The CCS assembly of any one of claims 1-4, wherein, The center of the first clearance hole (11) is directly opposite the center of the battery cell terminal (202).

7. The CCS assembly of any one of claims 1-4, wherein, The first clearance hole (11) is a circular hole or a square hole; And / or, the second clearance hole (31) is a circular hole or a square hole.

8. The CCS assembly of any one of claims 1-4, wherein, The busbar (2) is attached and fixed to the side of the bracket (1) away from the battery cell terminal (202); And / or, the elastic seal (3) is attached to the side of the bracket (1) near the cell terminal (202).

9. The CCS assembly of any one of claims 1-4, wherein, The busbar (2) is an aluminum busbar.

10. A battery module, characterized by The device includes multiple battery cells (20) and the CCS assembly according to any one of claims 1 to 9, wherein the battery cell (20) includes a battery cell terminal (202) and the battery cell terminal (202) is vacuum welded to the busbar (2).

Images