CCS assembly and battery module

Abstract

The present application provides a CCS assembly and a battery module. The CCS assembly comprises: a busbar set, comprising output busbars and connection busbars, wherein the two output busbars are correspondingly arranged on two ends of a battery module in the length direction, and the plurality of connection busbars are arranged between the two output busbars; a first insulating film; and an insulating support plate, arranged in parallel with the insulating film, wherein the first insulating film is located on the side of the busbar set facing away from battery cells and is attached to the busbar set, and the insulating support plate is located on the side of the busbar set facing the battery cells and is attached to the busbar set.

Description

A CCS component and battery module

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 12, 2023, with application number 2023224729130. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a CCS component and a battery module. Background Art

[0003] The CCS (Cells Contact System) components of battery modules tend to adopt the IBB (Integrated Busbar for Battery) solution, which usually uses two layers of PET film to wrap the busbar into a whole. Its structural strength is low, especially in the length direction of the CCS component. It is prone to deformation and bending during the production and assembly process, which is not conducive to production and transportation. Technical issues

[0004] This application aims to solve the following technical problem: how to improve the structural strength of CCS components. Technical Solutions

[0005] In the first aspect, the present application provides a CCS component, which is applied to a battery module, comprising: a busbar group, comprising an output bar and a connecting bar, wherein the two output bars are correspondingly arranged at the two ends of the battery module in the length direction; a plurality of connecting bars are arranged between the two output bars; a first insulating film; an insulating support plate, which is arranged parallel to the insulating film, the first insulating film is on the side of the busbar group away from the battery cell, and is adhered to the busbar group; the insulating support plate is on the side of the busbar group facing the battery cell, and is adhered to the busbar group.

[0006] In a second aspect, the present application provides a battery module, comprising a battery cell and the above-mentioned CCS assembly, wherein the battery cell is connected to the busbar group through the insulating support plate. Beneficial effects

[0007] The insulating support plate of the present application can provide a longitudinal upward support force for the busbar group and effectively insulate the busbar group from the battery cell, while the first insulating film can connect all the output bars and the connecting bars as a whole to realize the integrated integration of the busbar group. The first insulating film and the insulating support plate can realize the integrated integration of the busbar group while ensuring its structural strength, which is beneficial for the CCS component to maintain a high structural strength and effectively prevent the CCS component from deformation during production, assembly and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a schematic diagram of a top view of a CCS assembly provided in an embodiment of the present application;

[0009] FIG2 is a schematic diagram of the three-dimensional structure of the CCS assembly provided in an embodiment of the present application;

[0010] FIG3 is a schematic diagram of the exploded structure of a CCS assembly provided in an embodiment of the present application;

[0011] FIG4 is a schematic diagram of the three-dimensional structure of the insulating support plate provided in an embodiment of the present application;

[0012] FIG5 is a schematic diagram of the three-dimensional structure of the negative electrode output row provided in an embodiment of the present application;

[0013] FIG6 is a schematic front view of the structure of the negative electrode output row provided in an embodiment of the present application;

[0014] FIG7 is a schematic diagram of the three-dimensional structure of the positive electrode output row provided in an embodiment of the present application;

[0015] FIG8 is a schematic front view of the structure of the positive electrode output row provided in an embodiment of the present application;

[0016] FIG9 is a schematic diagram of the three-dimensional structure of a battery cell provided in an embodiment of the present application;

[0017] FIG10 is a schematic diagram of the three-dimensional structure of a connection bar provided in an embodiment of the present application;

[0018] FIG11 is a schematic diagram of the assembly of the battery cell and the insulating support plate provided in an embodiment of the present application.

[0019] Icons: 1. CCS assembly; 10a. Negative output row; 10b. Positive output row; 10c. Connecting row; 11. External connecting portion; 12. Internal connecting portion; 121. Main body; 122. Extension portion; 123a. Negative connecting piece; 123b. Positive connecting piece; 124. Bend portion; 125. Third positioning hole; 13. Conductive unit; 131. Positive portion; 132. Negative portion; 20. Battery cell; 200. Positive pole; 201, positive terminal; 202, negative terminal; 3, insulating support plate; 31, first welding hole; 32, second glue hole; 33, first positioning hole; 4, first insulating film; 41, second welding hole; 42, second positioning hole; 43, first glue hole; 44, third welding hole, 5, second insulating film; 51, outer covering portion; 52, inner covering portion; 521, fourth positioning hole; 6, FPC; 61, collecting nickel sheet. Modes for Carrying Out the Invention

[0020] Please refer to Figures 1 to 11. A CCS component 1 is applied to a battery module, including a busbar group, a first insulating film 4, and an insulating support plate 3, wherein: the busbar group includes an output bar and a connecting bar 10c, and the two output bars are correspondingly arranged at the two ends in the length direction of the battery module; a plurality of connecting bars 10c are arranged between the two output bars; the insulating support plate 3 is arranged parallel to the insulating film, and the first insulating film 4 is located on the side of the busbar group away from the battery cell 20 and is adhered to the busbar group; the insulating support plate 3 is located on the side of the busbar group facing the battery cell 20 and is adhered to the busbar group. In this embodiment, as shown in Figure 3, the insulating support plate 3 is located on the lower side of the busbar group, that is, the insulating support plate 3 is located on the lower side of the output bar and the connecting bar 10c. The insulating support plate 3 here can provide a longitudinal upward support force for the busbar group and effectively insulate the busbar group from the battery cell 20, and the first insulating film 4 can connect all the output bars and the connecting bar 10c as a whole to achieve the integrated integration of the busbar group. The first insulating film 4 cooperates with the insulating support plate 3 to achieve the integrated integration of the busbar group while ensuring its structural strength, which is beneficial to the IBB (Integrated Busbar for Battery) solution type CCS component 1 to maintain a high structural strength, which is beneficial to the production, assembly and transportation of this type of CCS component 1, and effectively prevents the CCS component 1 from deformation during the production, assembly and transportation process.

[0021] In this embodiment, the first insulating film 4 is bonded to the busbar assembly. Furthermore, optionally, the first insulating film 4 includes a base film layer and an adhesive layer. Optionally, the base film layer includes, but is not limited to, a PET film. During use, the adhesive layer is used to integrally bond the busbar assembly to the insulating support plate 3. The base film layer and the insulating support plate 3 encase or clamp the busbar assembly and the adhesive layer, thereby integrating the first insulating film 4, the busbar assembly, and the insulating support plate 3 that constitute the CCS assembly 1 into a single, integrated structure with high structural strength. That is, during use, the first insulating film 4 is bonded to the insulating support plate 3.

[0022] Of course, in other embodiments, the first insulating film 4 and the insulating support plate 3 can also be connected by thermal riveting. Specifically, a thermal riveting column (not shown in the figure) is provided on the insulating support plate 3, and a hole structure matching the thermal riveting column is provided on the first insulating film 4.

[0023] In this embodiment, the first insulating film 4 is cold-pressed or hot-pressed to the busbar assembly. Specifically, in cold-pressing, the first insulating film 4 is a cold-pressed film, and in use, the components of the busbar assembly are directly bonded to the first insulating film 4. In hot-pressing, the first insulating film 4 is a hot-pressed film, and in use, after the busbar assembly and other components are bonded to the first insulating film 4, a high-temperature pressure treatment is required to cure the adhesive layer.

[0024] Specifically, the insulating support plate 3 includes but is not limited to a fiberglass board or a plastic board.

[0025] In this embodiment, the CCS assembly 1 is applied to a cylindrical power battery module. The structure of the battery cell 20 is shown in Figure 9. The positive terminal 201 and the negative terminal 202 of the battery cell 20 are both arranged toward one side of the CCS assembly 1. As shown in Figures 3 and 10, the connecting bar 10c includes multiple conductive units 13. Each conductive unit 13 includes a positive electrode portion 131 and a negative electrode portion 132 that are interconnected. The conductive units 13 are used to connect two adjacent battery cells 20 in series. Specifically, the positive electrode portion 131 of the conductive unit 13 is welded to the positive terminal 201 of one of the battery cells 20, and the negative electrode portion 132 of the same conductive unit 13 is welded to the negative terminal 202 of the other battery cell 20. Multiple connecting bars 10c are arranged along the length of the battery module.

[0026] As shown in Figures 3 and 5 to 8, the output row includes a positive output row 10b and a negative output row 10a, wherein the positive output row 10b is located at the positive output end of the battery module, and the negative output row 10a is located at the negative output end of the battery module. The output row is provided with connecting pieces of the same number as the conductive units 13 constituting a single connecting row 10c, wherein the connecting piece on the negative output row 10a is a negative connecting piece 123a, which is used to connect to the negative end 202 of the battery cell 20 located at the negative output end of the battery module, and the connecting piece on the positive output row 10b is a positive connecting piece 123b, which is used to connect to the positive end 201 of the battery cell 20 located at the positive output end of the battery module.

[0027] In this embodiment, a first welding hole 31 is provided through the insulating support plate 3, and the busbar group is exposed toward the battery cell 20 side through the first welding hole 31. Specifically, the positive electrode portion 131, the negative electrode portion 132, and the connecting piece of the conductive unit 13 are exposed toward the battery cell 20 through the first welding hole 31. The first welding hole 31 here can ensure that the conductive unit 13, that is, the connecting bar 10c is welded to the battery cell 20 while ensuring the insulation between other parts of the connecting bar 10c and the battery cell 20, thereby improving the safety of the CCS assembly 1 during use. The first welding hole 31 here can assist in positioning during the assembly process of the CCS assembly 1 and the battery cell 20, which is conducive to improving the assembly accuracy of the CCS assembly 1 and the battery cell 20.

[0028] Furthermore, a second welding hole 41 is formed through the first insulating film 4, through which the busbar assembly is exposed away from the battery cell 20. Specifically, the positive electrode portion 131, the negative electrode portion 132 and the connecting piece of the conductive unit 13 are exposed away from the battery cell 20 through the second welding hole 41.

[0029] In this embodiment, the first welding hole 31 and the second welding hole 41 are correspondingly provided. When in use, a welding gun is inserted into the first welding hole 31 to weld the busbar assembly and the battery cell 20.

[0030] In this embodiment, a first adhesive hole 43 is provided through the first insulating film 4, and a second adhesive hole 32 is provided on the insulating support plate 3, corresponding to the first adhesive hole 43. The first adhesive hole 43 and the second adhesive hole 32 are connected. The connected first adhesive hole 43 and second adhesive hole 32 are used to inject foam adhesive into the gap between the battery cells 20 below the CCS assembly 1 in the battery module. During use, after the CCS assembly 1 and the battery cells 20 are assembled, the foam adhesive is injected through the first adhesive hole 43 and enters the battery cells 20 through the second adhesive hole 32.

[0031] Furthermore, the second glue holes 32 are connected to the gap between two adjacent battery cells 20 corresponding to the second glue holes 32. This arrangement facilitates the smooth injection of foam glue into the gap between two adjacent battery cells 20, effectively improving the efficiency of foam glue injection. At the same time, during the foam glue foaming process, some of the second glue holes 32 can discharge excess foam glue through the first glue holes 43, preventing the foam glue from excessively lifting the CCS assembly 1 when foaming toward it, which could cause a cold solder joint between the busbar assembly and the battery cells 20.

[0032] In this embodiment, as shown in Figures 3, 5 to 8, the output row includes an internal connection portion (12) and an external connection portion 11, the external connection portion 11 is connected to the internal connection portion (12), and the two are separately arranged; the thickness of the external connection portion 11 is greater than the thickness of the internal connection portion (12); the insulating support plate 3 is abutted against the side of the internal connection portion (12) facing the battery cell 20 in the thickness direction. The insulating support plate 3 abutting against the internal connection portion (12) can support the thinner internal connection portion (12), improve the structural strength of the internal connection portion (12), and effectively prevent the internal connection portion (12) from deforming during the transportation of the CCS assembly 1; at the same time, the output row composed of the separately arranged external connection portion 11 and the internal connection portion (12) has a simple processing technology and low production cost; and the structural design that the thickness of the external connection portion 11 is greater than the thickness of the internal connection portion (12) can effectively improve the structural strength of the output row, thereby improving the reliability of the connection structure between the two when the modules are connected in series. In this embodiment, the internal connection portion (12) is stamped and formed as a whole. The inner connecting portion (12) is welded to the outer connecting portion 11. In this embodiment, the connecting piece is provided on the inner connecting portion (12).

[0033] Furthermore, the internal connection portion (12) includes a main body portion 121, which is connected to the external connection portion 11; an extension portion 122 is provided on a side of the main body portion 121 away from the external connection portion 11, and the extension portion 122 is used to connect to the positive terminal 201 or the negative terminal 202 of the battery cell 20, and the insulating support plate 3 abuts against the extension portion 122. Here, the extension portion 122 extends in a direction parallel to the extension direction of the main body portion 121, and the extension portion 122 is connected to the main body portion 121 through a bending portion 124. Furthermore, the main body portion 121, the bending portion 124 and the extension portion 122 are integrally formed. In this embodiment, the external connection portion 11 is arranged in the main body portion 121 area, and the external connection portion 11 can play a role in increasing the structural strength of the main body portion 121, and the insulating support plate 3 abutting against the extension portion 122 can play a role in increasing the structural strength of the extension portion 122, thereby improving the structural strength of the internal connection portion (12) as a whole, and the structural arrangement of the insulating support plate 3 abutting against the extension portion 122 can balance the structural strength of each area of ​​the internal connection portion (12) on the basis of the external connection portion 11 increasing the structural strength of the main body portion 121. In this embodiment, the number of extension portions 122 is equal to the number of connecting pieces, and the connecting pieces are arranged one-to-one at the end of the extension portion 122 away from the external connection portion 11.

[0034] As shown in Figure 3, the CCS assembly 1 also includes a second insulating film 5. The insulating support plate 3 is positioned between the second insulating film 5 and the output bars, with the second insulating film 5 covering the output bars. The second insulating film 5 is made of the same material as the first insulating film 4 and is used to cover the output bars from bottom to top. Specifically, the second insulating film 5 is used to cover the main body 121 from bottom to top, insulating the main body 121 from the battery cells 20.

[0035] In this embodiment, the second insulating film 5 is adhered to the side of the main body 121 facing the battery cell 20 .

[0036] In this embodiment, the second insulating film 5 is disposed at the end of the lengthwise direction of the insulating support plate 3; the lengthwise direction of the insulating support plate 3 is parallel to the lengthwise direction of the battery module. The second insulating film 5, in conjunction with the insulating support plate 3, is used to insulate the busbar assembly from the battery cells 20. Specifically, as shown in FIG3 , the second insulating film 5 includes an outer covering portion 51 and an inner covering portion 52 that are interconnected. The outer covering portion 51 is attached to the output busbars, specifically, to the main body 121, and the inner covering portion 52 is attached to the insulating support plate 3.

[0037] In another embodiment, the two second insulating films 5 at both ends of the insulating support plate 3 can be integrally formed, that is, the second insulating film 5 is a single unitary body and extends along the side of the insulating support plate 3 facing the battery cells 20, with the ends of the second insulating film 5 extending to the corresponding main body 121. It should be noted that in this embodiment, the second insulating film 5 is provided with an avoidance notch corresponding to the first welding hole 31 to ensure that the busbar assembly can be welded to the battery cells 20.

[0038] In this embodiment, a first positioning hole 33 is provided through the insulating support plate 3, a second positioning hole 42 is provided on the first insulating film 4, a third positioning hole 125 is provided through the extension portion 122, and a fourth positioning hole 521 is provided through the second insulating film 5. The first positioning hole 33, the second positioning hole 42, the third positioning hole 125, and the fourth positioning hole 521 correspond to each other. During use, after the first insulating film 4, the output bar, the insulating support plate 3, and the second insulating film 5 are assembled, the first positioning hole 33 and its corresponding second positioning hole 42, the third positioning hole 125, and the fourth positioning hole 521 are coaxial, and are used for positioning and assembling the first insulating film 4, the output bar, the insulating support plate 3, and the second insulating film 5, which helps to improve the assembly accuracy of the CCS assembly 1.

[0039] In this embodiment, as shown in Figure 11, the thickness of the insulating support plate 3 is H1, and the height of the positive electrode post 200 of the battery cell 20 is H2. The positive electrode post 200 of the battery cell 20 passes through the insulating support plate 3 and is connected to the busbar assembly; 0

[0040] As shown in Figure 3, the CCS assembly 1 also includes an FPC 6, which is sandwiched between the first insulating film 4 and the busbar assembly. The FPC 6 is provided with a nickel collector plate 61 for connection to the busbar assembly. The first insulating film 4 is provided with a third welding hole 44 for exposing the nickel collector plate 61. The FPC 6 uses the nickel collector plate 61 to collect voltage information from the battery module for monitoring battery health. The structural design of the third welding hole 44, which exposes the nickel collector plate 61, facilitates welding between the nickel collector plate 61 and the corresponding busbar assembly during assembly.

[0041] This embodiment also provides a battery module, including a battery cell 20 and the aforementioned CCS assembly 1, wherein the battery cell 20 is connected to the busbar assembly through the insulating support plate 3. It is easy to assemble and has high safety.​

Claims

1. A CCS component, applied to a battery module, comprising: A busbar group, comprising an output bar and a connecting bar (10c), wherein two of the output bars are correspondingly arranged at two ends in the length direction of the battery module; and a plurality of connecting bars (10c) are arranged between the two output bars; a first insulating film (4); An insulating support plate (3) is arranged parallel to the insulating film, the first insulating film (4) is located on the side of the busbar group facing away from the battery cell (20) and is attached to the busbar group; the insulating support plate (3) is located on the side of the busbar group facing the battery cell (20) and is attached to the busbar group.

2. The CCS assembly according to claim 1, wherein: The first insulating film (4) is bonded to the busbar group.

3. The CCS assembly according to claim 1 or 2, wherein: The insulating support plate (3) is provided with a first welding hole (31) penetrating therethrough, and the busbar group is exposed toward the side of the battery core (20) through the first welding hole (31).

4. The CCS assembly according to claim 1 or 2, wherein: A second welding hole (41) is provided through the first insulating film (4), and the busbar group is exposed through the second welding hole (41) toward a side away from the battery core (20).

5. The CCS assembly according to claim 1 or 2, wherein: The first insulating film (4) is provided with a first glue hole (43) extending therethrough, the insulating support plate (3) is provided with a second glue hole (32) corresponding to the first glue hole (43), and the first glue hole (43) is communicated with the second glue hole (32).

6. The CCS assembly according to claim 5, wherein: The second glue hole (32) is connected to the gap between two adjacent battery cells (20) corresponding to the second glue hole (32).

7. The CCS assembly according to claim 1, wherein: The output row includes: Internal connecting portion (12); An external connection part (11) is connected to the internal connection part, and the two are separately arranged; The thickness of the outer connecting portion (11) is greater than the thickness of the inner connecting portion; The insulating support plate (3) abuts against a side surface of the inner connecting portion that faces the battery core (20) in the thickness direction thereof.

8. The CCS assembly according to claim 7, wherein: The inner connecting portion comprises a main body portion (121), and the main body portion (121) is connected to the outer connecting portion (11); An extension portion (122) is provided on a side of the main body portion (121) away from the external connection portion (11), and the extension portion (122) is used to be connected to a positive terminal (201) or a negative terminal (202) of a battery cell (20); The insulating support plate (3) abuts against the extending portion (122).

9. The CCS assembly according to any one of claims 1, 2 or 6-8, wherein: The CCS assembly (1) further comprises a second insulating film (5), the insulating support plate (3) is located between the second insulating film (5) and the output row, and the second insulating film (5) covers the output row.

10. The CCS assembly according to claim 9, wherein: The second insulating film (5) is arranged at the end of the insulating support plate (3) in the length direction; The length direction of the insulating support plate (3) is parallel to the length direction of the battery module.

11. The CCS assembly according to claim 9, wherein: The second insulating film (5) comprises an outer covering portion (51) and an inner covering portion (52) which are connected to each other, the outer covering portion (51) being adhered to the output row, and the inner covering portion (52) being adhered to the insulating support plate (3).

12. The CCS assembly according to any one of claims 1, 2 or 6-8, wherein: The insulating support plate (3) is a glass fiber plate or a plastic plate.

13. The CCS assembly of claim 1, wherein: The first insulating film (4) is cold-pressed or hot-pressed to the busbar assembly.

14. The CCS assembly of claim 1, wherein: The thickness of the insulating support plate (3) is H1, and the height of the positive electrode column (200) of the battery cell (20) is H2; The positive electrode column (200) of the battery cell (20) is connected to the busbar group through the insulating support plate (3); 0<H1≤H2.

15. The CCS assembly of claim 1, wherein: The CCS assembly (1) further comprises an FPC (6), wherein the FPC (6) is sandwiched between the first insulating film (4) and the busbar group; The FPC (6) is provided with a collection nickel sheet (61) for connecting to the busbar group; The first insulating film (4) is provided with a third welding hole (44) for exposing the collection nickel sheet (61).

16. The CCS assembly of claim 1, wherein: The first insulating film (4) is bonded to the insulating support plate (3).

17. A battery module, comprising a battery cell (20) according to the CCS assembly (1) as claimed in any one of claims 1 to 16, wherein the battery cell (20) is connected to the busbar group through the insulating support plate (3).

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