Integrated busbar assembly, battery pack and vehicle

Abstract

The utility model discloses an integrated busbar assembly, battery pack and vehicle, the integrated busbar assembly includes: insulation positioning piece, support plate, busbar and circuit board, the busbar and circuit board are fixed between insulation positioning piece and support plate, the busbar is distributed on the both sides of circuit board, the circuit board is fixed on the insulation positioning piece, the circuit board is fixed on the support plate, the circuit board is fixed on the support plate, and the circuit board is fixed on the support plate. The bus bar is electrically connected with the circuit board, the bus bar is fixed on the insulation positioning sheet, the insulation positioning sheet is provided with an opening, the bus bar is partially exposed out of the opening, the support plate is connected with the bus bar and / or the insulation positioning sheet, and the support plate is connected with the bus bar and / or the insulation positioning sheet. A first pole avoiding hole and a first anti-explosion valve avoiding hole are formed in the supporting plate. The integrated busbar assembly is arranged above the battery pack in the battery, and is adhered to the surface of the upper cover of the battery cell in the battery pack through the supporting plate, so that the upper end of the battery cell pack is integrally connected, the integral rigidity of the battery cell pack is improved, and the rigidity of the whole battery pack is further improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an integrated busbar assembly, a battery pack, and a vehicle. Background Technology

[0002] In existing technologies, CTP (Cell to Pack) battery packs use liquid cooling plates to support and dissipate heat from the cells. The lower end of each cell is bonded and fixed to the cooling plate, forming a fixed lower part of the cell assembly. However, the upper part of the cell assembly lacks a fixed upper part, resulting in insufficient overall rigidity of the battery pack. Under vibration / impact conditions, this affects the service life and safety of the battery pack. Utility Model Content

[0003] This utility model provides an integrated busbar to solve the problem of insufficient overall rigidity of the battery pack due to the lack of an integral connection at the top of the cell group in the prior art.

[0004] One embodiment of this utility model provides an integrated bus assembly, including: an insulating positioning plate, a support plate, a bus, and a circuit board. The bus and the circuit board are fixedly disposed between the insulating positioning plate and the support plate. The bus is distributed on both sides of the circuit board and electrically connected to the circuit board. The bus is fixed on the insulating positioning plate, which has an opening through which part of the bus is exposed. The support plate is connected to the bus and / or the insulating positioning plate. The support plate has a first pole clearance hole and a first explosion-proof valve clearance hole.

[0005] In some embodiments, the insulating positioning sheet is a blister film, and the busbar is bonded and positioned on the insulating positioning sheet.

[0006] In some embodiments, the circuit board is an FPC circuit board, which is electrically connected to the busbar via nickel strips.

[0007] In some embodiments, the support plate is a continuous fiber reinforced composite material or a short fiber composite material with a thickness of 0.5 mm to 1.5 mm.

[0008] In some embodiments, the Young's modulus of the support plate is between 5 GPa and 30 GPa.

[0009] In some embodiments, at least a portion of the surface of the support plate facing away from the busbar is treated with surface energy enhancement, resulting in a dyne value greater than 35.

[0010] In another aspect, this utility model also provides a battery pack, including a housing, a battery cell assembly fixed in the housing, and an integrated busbar assembly as described in any of the foregoing embodiments. The integrated busbar assembly is disposed above the battery cell assembly. The surface of the support plate facing away from the busbar is bonded to the upper cover surface of at least some of the battery cells in the battery cell assembly. The terminal of the battery cell passes through the first terminal clearance hole and is electrically connected to the busbar. The explosion-proof valve of the battery cell is disposed opposite to the first explosion-proof valve clearance hole.

[0011] In some embodiments, the battery pack further includes an adhesive baffle disposed between the integrated busbar and the cell assembly. The adhesive baffle includes an insulating film and an adhesive baffle strip disposed on the surface of the insulating film. The insulating film has a second terminal clearance hole, a second explosion-proof valve clearance hole, and an adhesive application clearance hole. The adhesive baffle strip is disposed on both sides of the second terminal clearance hole and the second explosion-proof valve clearance hole. The adhesive application clearance holes are distributed on both sides of the second terminal clearance hole and the second explosion-proof valve clearance hole. The terminal of the cell passes through the second terminal clearance hole. The explosion-proof valve of the cell is disposed opposite to the second explosion-proof valve clearance hole. The portion of the top cover surface of the cell exposed by the adhesive application clearance holes is coated with adhesive.

[0012] In some embodiments, a plurality of second pole post clearance holes and second explosion-proof valve clearance holes are arranged side by side on the insulating film, and one of the adhesive baffles covers the surface of a plurality of battery cell top covers.

[0013] In another aspect, this utility model also provides a vehicle, including the integrated bus assembly or the battery pack described in any of the foregoing embodiments.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The integrated busbar assembly provided in this embodiment includes an integral support plate. The integrated busbar assembly is arranged above the battery pack in the battery. The support plate is bonded to the upper cover surface of the battery cell in the battery pack, thereby connecting the upper end of the battery cell group as a whole, improving the overall rigidity of the battery cell group, and thus improving the rigidity of the entire battery pack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the integrated bus provided in one embodiment of the present invention;

[0017] Figure 2 This is an exploded view of the integrated busbar provided in one embodiment of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of a battery pack provided in one embodiment of the present invention;

[0019] Figure 4 This is an exploded view of a portion of the battery pack structure provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the adhesive-blocking component provided in one embodiment of the present invention;

[0021] Figure 6 This is a partial structural diagram of the battery pack cell assembly provided in one embodiment of the present invention.

[0022] Attached image annotations:

[0023] 1. Integrated busbar; 11. Insulating positioning film; 111. Opening; 12. Support plate; 121. First pole post clearance hole; 122. First explosion-proof valve clearance hole; 13. Busbar; 14. Circuit board; 2. Battery pack; 21. Housing; 22. Cell assembly; 23. Cell; 231. Pole post; 232. Explosion-proof valve; 3. Adhesive baffle; 31. Insulating film; 32. Adhesive baffle strip; 33. Second pole post clearance hole; 33. Second explosion-proof valve clearance hole; 35. Adhesive application clearance hole. Detailed Implementation

[0024] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] See Figure 1-2As shown in the illustration, this utility model discloses an integrated busbar 1, including an insulating positioning piece 11, a support plate 12, multiple busbars 13, and a circuit board 14. The multiple busbars 13 and the circuit board 14 are fixedly disposed between the insulating positioning piece 11 and the support plate 12, i.e., the insulating positioning piece 11 and the support plate 12 sandwich the busbars 13 and the circuit board 14. The busbars 13 are distributed on both sides of the circuit board 14, and each busbar 13 is electrically connected to the circuit board 14. The busbars 13 are fixed to the insulating positioning piece 11. The insulating positioning piece 11 has openings 111, which correspond to the welding areas of the busbars 13, and the welding areas of the busbars 13 are exposed through the openings 111. The support plate 12 supports the busbars 13, the circuit board 14, and the insulating positioning piece 11, and is connected to the busbars 13 and / or the insulating positioning piece 11. The support plate 12 has a first electrode post clearance hole 121 and a first explosion-proof valve clearance hole 122, wherein the first electrode post clearance hole 121 is positioned opposite to the opening 111. When the integrated busbar assembly 1 in this embodiment is applied to the battery, the surface of the support plate 12 facing away from the busbar 13 is used to bond with the surface of the top cover of all the cells in the battery pack, thereby providing an overall connection at the top of the cell assembly and improving the overall rigidity of the battery pack.

[0026] In one embodiment, the insulating positioning sheet 11 is a blister pack, and the busbar 13 is positioned on the insulating positioning sheet 11. The insulating positioning sheet 11 has positioning features, such as protrusions or grooves, and the busbar 13 has corresponding positioning features, such as through holes or protrusions. The busbar 13 is positioned at the corresponding position on the insulating positioning sheet 11 and is bonded to the insulating positioning sheet 11 with adhesive. The circuit board 14 is an FPC, and each busbar 13 is electrically connected to the circuit board 14 via a wire, which can be a nickel strip. During manufacturing, the busbar 13 and the circuit board 14 are first connected via nickel strips, and then the connected circuit board 14 and busbar 13 are positioned on the surface of the insulating positioning sheet 11. The busbar 13 and the insulating positioning sheet 11 are bonded together with pressure-sensitive adhesive. Finally, the connected insulating positioning sheet 11, busbar 13, and circuit board 14 are fixed to the support plate 12. The entire integrated busbar 1 can be manufactured by bonding the busbar 13 to the support plate 11 with pressure-sensitive adhesive, or by bonding the insulating positioning piece 11 to the support plate with pressure-sensitive adhesive, or by bonding both the busbar 13 and the insulating positioning piece 11 to the support plate 11 with pressure-sensitive adhesive.

[0027] In one embodiment, the support plate 11 is a continuous fiber reinforced composite material or a short fiber reinforced composite material, which is processed by RTM or STM process and has a thickness of 0.5mm-1.5mm. The support plate 11 itself has insulation properties.

[0028] In one embodiment, the Young's modulus of the support plate 11 is between 5 GPa and 30 GPa, ensuring that the support plate 11 has sufficient rigidity.

[0029] In one embodiment, the surface of the support plate 11 facing away from the busbar 13 is planar, and at least a portion of it undergoes surface energy enhancement treatment with a dyne value greater than 35. The surface of the support plate 11 facing away from the busbar 13 is bonded to the surface of the cell cover using an adhesive, such as polyurethane structural adhesive, epoxy structural adhesive, UV adhesive, or PP hot melt adhesive. The dyne value of the bonding area with the surface of the cell cover is greater than 35 to ensure the bonding strength between the support plate 11 and the surface of the cell cover.

[0030] Please see Figure 3-6 As shown, this utility model also provides a battery pack 2, which includes a housing 21, a cell assembly 22 fixed in the housing 21, and an integrated busbar assembly 1 as described in the above embodiment. In this embodiment, the cell 23 is a square cell. The integrated busbar assembly 1 is disposed above the cell assembly 22. The surface of the support plate 11 in the integrated busbar assembly 1 facing away from the busbar 13 is bonded to the surface of the cover of all the cells 23 in the cell assembly 22 by structural adhesive. The terminal post 231 of the cell 23 passes through the first terminal post clearance hole 121 on the support plate 12 and is welded to the busbar 13. The explosion-proof valve 232 of the cell 23 is disposed opposite to the first explosion-proof valve clearance hole 122 on the support plate 12 and protrudes from the position of the first explosion-proof valve clearance hole 122, so that the explosion-proof valve 232 of the cell 23 can be normally exploded.

[0031] In one embodiment, to prevent adhesive from overflowing onto the terminals 231 and explosion-proof valve 232 of the battery cell 23 during the application of adhesive to the top cover surface, an adhesive-blocking component 3 is provided. The adhesive-blocking component 3 includes an insulating film 31 and adhesive-blocking strips 32 disposed on the surface of the insulating film 31. The insulating film 31 has a second terminal clearance hole 33, a second explosion-proof valve clearance hole 34, and adhesive application clearance holes 35. The adhesive-blocking strip 32 is disposed on both sides of the second terminal clearance hole 33 and the second explosion-proof valve clearance hole 34. The adhesive application clearance holes 35 are distributed on both sides of the second terminal clearance hole 33 and the second explosion-proof valve clearance hole 34. The adhesive-blocking element 3 is attached to the upper cover surface of the battery cell 23. The terminal post 231 of the battery cell 23 passes through the second terminal post clearance hole 34. The explosion-proof valve of the battery cell 23 is positioned opposite to the second explosion-proof valve clearance hole. The adhesive-blocking strip 32 is located on both sides of the terminal post 231 and the explosion-proof valve 232 of the battery cell 23. The portion of the upper cover surface of the battery cell 23 exposed through the adhesive clearance hole 34 is used for adhesive application. The adhesive-blocking strip 32 prevents adhesive from overflowing to the terminal post 231 and the explosion-proof valve 232. The adhesive-blocking strip 32 is made of foam material and can be compressed, allowing the adhesive to fully contact the support plate 11.

[0032] Because the insulating film 31 is relatively thin, to reduce the assembly process of applying the adhesive-blocking component 3 to the surface of the battery cell 23 and increase assembly efficiency, in one embodiment, multiple second pole clearance holes 33 and explosion-proof valve clearance holes 34 are arranged side by side on the insulating film 31, so that the adhesive-blocking component 3 has a suitable size, and one adhesive-blocking component 3 can cover multiple battery cells 23. In a preferred embodiment, one adhesive-blocking component 3 covers four battery cells. The insulating film 31 is bonded to the surface of the battery cell 23 cover, such as by pressure-sensitive adhesive, double-sided adhesive, etc.

[0033] This invention also provides a vehicle that uses the integrated busbar assembly or battery pack described in the above embodiments.

[0034] This invention can achieve at least the following beneficial effects:

[0035] The integrated busbar assembly, including the overall support plate, is arranged above the cell group in the battery pack. The support plate is bonded to the top cover surface of the cell in the battery pack, and the upper end of the cell group is connected as a whole, which improves the overall rigidity of the cell group and thus improves the rigidity of the entire battery pack.

[0036] It should be noted that although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. An integrated busbar assembly, comprising: The application relates to an integrated busbar assembly, which comprises an insulating positioning sheet, a support plate, a busbar and a circuit board, the busbar and the circuit board are fixedly arranged between the insulating positioning sheet and the support plate, the busbar is distributed on both sides of the circuit board, the busbar and the circuit board are electrically connected, the busbar is fixed on the insulating positioning sheet, the insulating positioning sheet is provided with an opening, and the busbar is partially exposed from the opening, the support plate is connected with the busbar and / or the insulating positioning sheet, and the support plate is provided with a first pole post avoiding hole and a first explosion-proof valve avoiding hole. The insulating positioning sheet is a blister film, and the busbar is adhesively positioned on the insulating positioning sheet.

2. The integrated busbar assembly of claim 1, wherein, The circuit board is an FPC circuit board, and the circuit board is electrically connected with the busbar through a nickel sheet.

3. The integrated busbar assembly of claim 1, wherein, The support plate is a continuous fiber reinforced composite material or a short fiber composite material, and the thickness is 0.5mm-1.5mm.

4. The integrated busbar assembly of claim 1, wherein, The Young's modulus of the support plate is between 5Gpa and 30Gpa.

5. The integrated busbar assembly of claim 1, wherein, The surface of the support plate, which is away from the busbar, has an area with a surface area of greater than 35.

6. The integrated busbar assembly of claim 1, wherein, The application further relates to a battery pack, which comprises a box body, a cell group fixed in the box body and the integrated busbar assembly.

7. A battery pack, characterized by, The application further relates to a battery pack, which comprises a box body, a cell group fixed in the box body and the integrated busbar assembly.

8. The battery pack of claim 7, wherein, The application further relates to a battery pack, which comprises a box body, a cell group fixed in the box body and the integrated busbar assembly.

9. The battery pack of claim 8, wherein, ​ 10. A vehicle characterized by comprising: ​

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