High-integration CCS module structure of power battery module

Abstract

The utility model relates to a high integration CCS module structure of a power battery module, which comprises a mounting bracket, a plurality of busbars arranged on the mounting bracket, and a battery cell small plate arranged on the mounting bracket, the plurality of busbars are welded on the battery cell small plate, the battery cell small plate is provided with an output pin header, and the output pin header is used for being connected with a BMS circuit board. According to the utility model, the CCS module structure is optimized, a wiring harness structure of a traditional CCS assembly is removed, and the production process difficulty of the CCS module is reduced.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a highly integrated CCS module structure of a power battery module. Background Art

[0002] A Chinese patent with application number CN202320157024.2 discloses a CCS sampling assembly and a battery pack. The CCS sampling assembly includes a sampling harness, a connector and an aluminum busbar. The sampling harness includes multiple branch harnesses. One ends of the multiple branch harnesses are tightened together to form a tightening end, and the other ends are arranged at intervals and form an avoidance area. Each branch harness has multiple strands of wires, and one end of the multiple strands of wires is commonly connected to the connector. The connector is connected to the BMS slave board in the battery pack.

[0003] The above-mentioned CCS sampling assembly transmits data to the BMS slave board through multiple wires. The above-mentioned product has a large number of wires, and the multi-wire structure will increase the structural complexity and process difficulty of the CCS sampling assembly, making the production of the CCS sampling assembly more difficult. Utility Model Content

[0004] The present application provides a highly integrated CCS module structure for a power battery module, optimizes the CCS module structure, removes the wiring harness structure of a traditional CCS assembly, and reduces the difficulty of the production process of the CCS module.

[0005] The present application provides a power battery module with a high-integration CCS module structure that adopts the following technical solutions:

[0006] A highly integrated CCS module structure of a power battery module comprises a mounting bracket, a plurality of busbars arranged on the mounting bracket, and a battery cell board arranged on the mounting bracket, wherein the busbar is used to be electrically connected to the battery cell module, and the plurality of busbars are welded on the battery cell board, and the battery cell board is provided with an output pin header, and the output pin header is used to be connected to a BMS circuit board.

[0007] By adopting the above technical solution, the structure of the CCS module is optimized by directly welding the busbar on the battery board and connecting the battery board and the BMS circuit board through output pins, so as to achieve the purpose of removing the traditional CCS module wiring harness structure, while reducing the production difficulty of the CCS module and making the internal components of the CCS module more integrated.

[0008] Preferably, a first groove for placing a battery cell board is provided in the middle of the mounting bracket, and a plurality of second grooves are respectively opened on both sides of the first groove, and the second grooves are used to place the bus, and the plurality of second grooves are all connected to the first groove, and the plurality of second grooves located on the same side are arranged equidistantly along the length direction of the first groove.

[0009] By adopting the above technical solution, the opening of the first groove and multiple second grooves limits the placement positions of multiple bus bars and battery cell boards, preventing workers from making inaccurate connection positions of the bus bars and battery cell boards when assembling the CCS module, thereby ensuring the yield rate of CCS module production.

[0010] Preferably, the plurality of busbars are welded to the cell board via metal sheets, one end of the plurality of metal sheets is welded to the cell board, and the other end of the plurality of metal sheets is welded to one end of the busbar close to the cell board.

[0011] By adopting the above technical solution, the connection method of the metal sheet makes it easier to remove the return bus from the battery cell board during later maintenance of the CCS module.

[0012] Preferably, a fixing block is provided on the bottom wall of the first groove, a threaded hole is opened on the fixing block, and a bolt is provided on the battery cell plate, and the bolt matches the threaded hole.

[0013] By adopting the above technical solution, the setting of the fixing block forms a cavity between the bottom wall of the first groove and the small battery plate, so that the heat of the battery cell is directly transferred to the small battery plate through the mounting bracket to prevent the small battery plate from overheating. At the same time, the bolted small battery plate is fixed to the fixing block through the cooperation of the bolt and the threaded hole, preventing the small battery plate from moving and improving the stability of the connection between the metal sheet and the small battery plate.

[0014] Preferably, a third limiting column is provided on the side wall of the first groove, and the diameter of the third limiting column gradually decreases from one end close to the bottom wall of the first groove to the end far from the bottom wall of the first groove, and a third limiting groove which is plugged into and cooperates with the third limiting column is opened on the battery cell board.

[0015] By adopting the above technical solution, the cooperation between the third limiting groove and the third limiting column limits the position of the battery cell plate placed in the first groove, so that the bolt can be connected to the threaded hole more accurately.

[0016] Preferably, a first limiting column is provided on one end of the plurality of second grooves away from the first groove, a plurality of the bus bars are provided with a first limiting groove plug-matched with the first limiting column, a plurality of the second grooves are provided with a second limiting column on one end close to the first groove, and a plurality of the bus bars are provided with a second limiting groove plug-matched with the second limiting column.

[0017] By adopting the above technical solution, when the bus is placed in the second groove, the first limiting column is inserted into the first limiting groove, and the second limiting column is inserted into the second limiting groove. The relative movement of the bus is limited by the plug-in fit between the first limiting column and the second limiting groove and the plug-in fit between the second limiting column and the second limiting groove, thereby preventing damage to the connection between the bus and the metal sheet.

[0018] Preferably, two second limiting columns are provided in each of the second grooves, and the two first limiting columns located in the same second groove are respectively located on two sides of a metal sheet.

[0019] By adopting the above technical solution, the stability of the connection between the busbar and the metal sheet is further improved.

[0020] Preferably, a plurality of groups of battery cell modules are provided under the mounting bracket, and the battery cell modules include two battery cell blocks, each of which is provided with a positive electrode ear and a negative electrode ear, and the positive electrode ear on each battery cell block is folded with the negative electrode ear on the adjacent battery cell block to form a electrode ear welding part, and each of the electrode ear welding part is laser welded to a corresponding bus.

[0021] By adopting the above technical solution, multiple groups of battery cell modules are connected to multiple bus bars.

[0022] Preferably, a plurality of avoidance grooves are provided on the mounting bracket, and the positive and negative pole ears on the plurality of battery core blocks pass through the mounting bracket via adjacent avoidance grooves and are folded and connected to each other above the corresponding busbars.

[0023] By adopting the above technical solution, the mounting bracket can be limited to multiple groups of battery cell modules through the cooperation of the pole ear welding part and the busbar without using redundant structures such as bolts, making the internal structure of the CCS module simpler and the integration between components higher.

[0024] Preferably, adjacent battery core modules are filled with foam pads, and the foam pads are polyurethane foam pads.

[0025] By adopting the above technical solution, polyurethane foam pads are filled to protect multiple groups of battery cell modules.

[0026] The technical effects of this utility model are mainly reflected in the following aspects:

[0027] 1. The utility model optimizes the structure of the CCS module by directly welding the busbar on the battery cell board and connecting the battery cell board and the BMS circuit board through the output pin row, so as to achieve the purpose of removing the wiring harness between the traditional CCS module and the BMS board, while reducing the production difficulty of the CCS module and making the integration of the components inside the CCS module higher;

[0028] 2. The utility model limits the position of the battery plate in the first groove by the cooperation of the third limiting groove and the third limiting column, so that the bolt can be connected to the threaded hole more accurately;

[0029] 3. The utility model limits the relative movement of the busbar by plugging and fitting the first limiting column and the second limiting groove and the second limiting column and the second limiting groove, thereby preventing damage to the connection between the busbar and the metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the CCS module of this application.

[0031] Figure 2 yes Figure 1 Schematic diagram of the structure of the mounting bracket.

[0032] Figure 3 yes Figure 1 Schematic diagram of the structure of the small board of the battery cell.

[0033] Figure 4 yes Figure 1 Schematic diagram of the structure of a bus bar.

[0034] Figure 5 yes Figure 1 Cross-sectional view of the CCS module along line AA.

[0035] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle.

[0036] Figure numerals: 1. Mounting bracket; 11. First groove; 12. Second groove; 13. Fixed block; 14. First limiting column; 15. Second limiting column; 16. Third limiting column; 17. Avoidance groove; 18. Threaded hole; 2. Battery cell board; 21. Bolt; 22. Third limiting groove; 3. Bus; 31. First limiting groove; 32. Second limiting groove; 4. Output pin row; 5. Metal sheet; 6. Battery cell module; 61. Battery cell block; 62. Positive ear; 63. Negative ear; 7. Ear welding part; 8. Foam pad. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings to make the technical solution of the present application easier to understand and grasp.

[0038] Reference Figure 1 and Figure 2A high-integration CCS module structure of a power battery module in this embodiment includes a mounting bracket 1, a first groove 11 is opened in the middle of the mounting bracket 1 along the X-axis direction, three fixing blocks 13 are fixed on the bottom wall of the first groove 11, and the three fixing blocks 13 are arranged equidistantly in the first groove 11 along the length direction of the first groove 11, and threaded holes 18 are opened on the top surfaces of the three fixing blocks 13 along the Z-axis direction.

[0039] Reference Figure 1-Figure 3 A small battery board 2 is also installed in the first groove 11. Three bolts 21 and two groups of output pins 4 are provided on the small battery board 2. The output pins 4 are used to connect with the BMS circuit board. The three bolts 21 are threadedly connected in the three threaded holes 18 so that the three bolts 21 press the small battery board 2 on the three fixed blocks 13. A plurality of third limiting columns 16 are provided on the side wall of the first groove 11. The diameters of the plurality of third limiting columns 16 gradually decrease from one end close to the bottom wall of the first groove 11 to one end away from the bottom wall of the first groove 11. A plurality of third limiting grooves 22 are provided on the small battery board 2 to be plugged with the plurality of third limiting columns 16. When the small battery board 2 is placed on the three fixed blocks 13 and the plurality of third limiting columns 16 are plugged into the plurality of third limiting grooves 22, the three bolts 21 are aligned with the three threaded holes 18.

[0040] Reference Figure 1 and Figure 4 The mounting bracket 1 has a plurality of second grooves 12 on both sides of the first groove 11 along the Y-axis direction. The plurality of second grooves 12 are connected to the first groove 11, and the second grooves 12 on the same side are arranged equidistantly along the X-axis direction. A first limiting column 14 is fixed on one end of the plurality of second grooves 12 away from the first groove 11, and two second limiting columns 15 are fixed on one end of the plurality of second grooves 12 close to the first groove 11. A busbar 3 is inserted in each second groove 12, and a plurality of busbars 3 are provided with a first limiting groove 31 that is plugged in with the first limiting column 14, and a plurality of busbars 3 are provided with a second limiting groove 32 that is plugged in with the second limiting column 15.

[0041] Reference Figure 1 , multiple busbars 3 are welded to the cell board 2 through metal sheets 5, one end of multiple metal sheets 5 is welded to the cell board 2, and the other end of multiple metal sheets 5 is welded to one end of the busbar 3 close to the cell board 2. Two second limiting posts 15 in the same second groove 12 are located at both ends of the same metal sheet 5, wherein the metal sheet 5 is a nickel sheet.

[0042] Reference Figure 1 , Figure 5 and Figure 6A plurality of groups of battery modules 6 are also arranged below the mounting bracket 1, and foam pads 8 are filled between each group of battery modules 6, and the foam pads 8 are polyurethane foam pads. Each group of battery modules 6 includes two battery blocks 61, and each battery block 61 is provided with two positive pole ears 62 and two negative pole ears 63, and the two positive pole ears 62 on each battery block 61 are respectively adjacent to the two negative pole ears 63 on the adjacent battery block 61 that is not in the same group.

[0043] Reference Figure 1 , Figure 5 and Figure 6 , two avoidance grooves 17 are provided in each second groove 12 along the X-axis direction, and the two avoidance grooves 17 in each second groove 12 are respectively located on both sides of the busbar 3. The positive tabs 62 and negative tabs 63 on two adjacent but different groups of battery core blocks 61 respectively pass through the corresponding avoidance grooves 17 and extend into the same second groove 12. The positive tabs 62 and negative tabs 63 extending into the same second groove 12 are folded together to form tab welding portions 7, and the multiple tab welding portions 7 are respectively located on the side of the multiple busbars 3 away from the second groove 12, wherein the positive tab 62 is located on the side of the negative tab 63 away from the busbar 3, and the multiple tab welding portions 7 are respectively laser welded on the multiple busbars 3.

[0044] The specific production process of the CCS module in this application is as follows:

[0045] First, multiple busbars 3 and a small battery plate 2 are placed on the mounting bracket 1, and then three bolts 21 are screwed into three threaded holes 18 to fix the small battery plate 2. Then, nickel sheet metal sheets 5 are welded to the multiple busbars 3 and the small battery plate 2 one by one, thereby completing the connection between the multiple busbars 3 and the small battery plate 2.

[0046] Then, the mounting bracket 1 is placed on the assembled multiple groups of battery modules 6, so that the positive tabs 62 and negative tabs 63 on each battery block 61 pass through the corresponding avoidance grooves 17, and then all the positive tabs 62 and negative tabs 63 are bent so that the positive tabs 62 and negative tabs 63 located in the same second groove 12 are folded together to form tab welding parts 7, and then multiple tab welding parts 7 are welded to the corresponding busbars 3 to complete the assembly of the CCS module. Compared with the traditional CCS module, the present application removes the redundant wiring harness, which makes the structure between the CCS modules more compact and reduces the production difficulty.

[0047] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A highly integrated CCS module structure for a power battery module, characterized in that: The invention comprises a mounting bracket (1), a plurality of busbars (3) arranged on the mounting bracket (1), and a battery cell board (2) arranged on the mounting bracket, wherein the busbar (3) is used to be electrically connected to a battery cell module (6), the plurality of busbars (3) are welded to the battery cell board (2), the battery cell board (2) is provided with an output pin (4), and the output pin (4) is used to be connected to a BMS circuit board.

2. The highly integrated CCS module structure of a power battery module according to claim 1, characterized in that: A first groove (11) for accommodating a battery cell plate (2) is provided in the middle of the mounting bracket (1), and a plurality of second grooves (12) are respectively provided on both sides of the first groove (11), wherein the second grooves (12) are used for accommodating a busbar (3), and the plurality of second grooves (12) are all connected to the first groove (11), and the plurality of second grooves (12) located on the same side are arranged equidistantly along the length direction of the first groove (11).

3. The highly integrated CCS module structure of a power battery module according to claim 2, characterized in that: The plurality of busbars (3) are welded to the cell plate (2) via metal sheets (5), one end of the plurality of metal sheets (5) is welded to the cell plate (2), and the other end of the plurality of metal sheets (5) is welded to one end of the busbar (3) close to the cell plate (2).

4. The highly integrated CCS module structure of a power battery module according to claim 3, characterized in that: A fixing block (13) is provided on the bottom wall of the first groove (11), a threaded hole (18) is provided on the fixing block (13), a bolt (21) is provided on the battery cell plate (2), and the bolt (21) matches the threaded hole (18).

5. The highly integrated CCS module structure of a power battery module according to claim 4, characterized in that: A third limiting column (16) is provided on the side wall of the first groove (11), and the diameter of the third limiting column (16) gradually decreases from one end close to the bottom wall of the first groove (11) to one end away from the bottom wall of the first groove (11), and a third limiting groove (22) pluggably matched with the third limiting column (16) is provided on the battery cell plate (2).

6. The highly integrated CCS module structure of a power battery module according to claim 3, characterized in that: A first limiting column (14) is provided on one end of the plurality of second grooves (12) away from the first groove (11), a first limiting groove (31) pluggably matched with the first limiting column (14) is provided on a plurality of the bus bars (3), a second limiting column (15) is provided on one end of the plurality of second grooves (12) close to the first groove (11), and a second limiting groove (32) pluggably matched with the second limiting column (15) is provided on a plurality of the bus bars (3).

7. The highly integrated CCS module structure of a power battery module according to claim 5, characterized in that: Two second limiting columns (15) are arranged in each of the second grooves (12), and the two first limiting columns (14) located in the same second groove (12) are respectively located on two sides of a metal sheet (5).

8. The highly integrated CCS module structure of a power battery module according to claim 1, characterized in that: A plurality of groups of battery modules (6) are arranged below the mounting bracket (1), the battery modules (6) comprising two battery blocks (61), each of the battery blocks (61) being provided with a positive electrode ear (62) and a negative electrode ear (63), the positive electrode ear (62) on each of the battery blocks (61) being folded with the negative electrode ear (63) on the adjacent battery block (61) to form an electrode ear welding portion (7), and each of the electrode ear welding portions (7) being laser welded to a corresponding bus bar (3).

9. The highly integrated CCS module structure of a power battery module according to claim 8, characterized in that: The mounting bracket (1) is provided with a plurality of avoidance grooves (17), and the positive pole ears (62) and negative pole ears (63) on the plurality of battery core blocks (61) pass through the mounting bracket (1) through adjacent avoidance grooves (17) and are folded and connected to each other above the corresponding busbar (3).

10. The highly integrated CCS module structure of a power battery module according to claim 8, characterized in that: Adjacent battery core modules (6) are filled with foam pads (8), and the foam pads (8) are polyurethane foam pads.

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