Battery module welding assembly system

Abstract

The invention discloses a battery module welding and assembling system, and relates to the field of battery preparation. The welding tool specifically comprises a battery module and welding tool bodies installed on the two sides of the battery module, the battery module at least comprises a battery cell assembly and a connecting assembly, the connecting assembly comprises a plastic uptake isolation plate and a busbar, the busbar is installed on the face, opposite to the battery cell assembly, of the plastic uptake isolation plate, and the battery cell assembly is installed on the side, opposite to the busbar, of the plastic uptake isolation plate. And the blister isolation plate is mounted on one surface, facing the battery cell assembly, of the welding tool. According to the battery module welding assembly system provided by the invention, by designing the combination of the plastic uptake isolation plate and the busbar, the mold opening cost can be reduced, and the plastic uptake isolation plate is relatively easy to adjust and high in flexibility.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, and more particularly to a battery module welding and assembly system. Background Technology

[0002] With societal development, energy storage technology is a key link in developing clean energy and achieving energy transformation. With the rapid growth of the global energy storage market, electrochemical energy storage has enormous potential for the future.

[0003] Currently, there are many integrated energy storage systems using blade batteries in the energy storage market. The terminals of blade batteries are on the left and right sides, which means that the series welding between cells needs to be done on the side. At present, most of the CCS (Cell Connection System) components of blade cells are injection molded separators + bus solutions. However, the injection mold costs are high, the mold opening cycle is long, and it is difficult to adjust later, resulting in low flexibility. Summary of the Invention

[0004] In view of this, the present invention provides a battery module welding assembly system. By designing a combination of a vacuum-formed separator and a busbar, the system can reduce mold opening costs, and the vacuum-formed separator is easy to adjust and highly flexible, thus solving at least one of the above-mentioned technical problems.

[0005] The present invention provides a battery module welding assembly system, including a battery module and welding fixtures installed on both sides of the battery module. The battery module includes at least a cell assembly and a connecting assembly. The connecting assembly includes a vacuum-formed isolation plate and a busbar. The busbar is installed on the side of the vacuum-formed isolation plate facing away from the cell assembly, and the vacuum-formed isolation plate is installed on the side of the welding fixture facing the cell assembly.

[0006] Furthermore, the battery module includes a base, end plates, and a top connecting beam. The end plates are installed at both ends of the base, the cell assembly is disposed between the end plates, and the top connecting beam is disposed at the top of the cell assembly and connected to the end plates.

[0007] Furthermore, the battery cell assembly includes multiple battery cells, each battery cell having terminals on both sides, and each terminal having recessed holes at its upper and lower ends.

[0008] Furthermore, the connection assembly includes a vacuum-formed isolation plate and a busbar. The vacuum-formed isolation plate has a mounting groove on the side facing away from the battery cell assembly, and the busbar is installed in the mounting groove.

[0009] Furthermore, the upper and lower ends of the mounting groove are provided with snap-fit ​​blocks, and snap-fit ​​grooves are formed between the snap-fit ​​blocks and the groove wall of the mounting groove, and the upper and lower ends of the busbar are snapped into the snap-fit ​​grooves.

[0010] Furthermore, the vacuum-formed isolation plate is provided with a wire-tying hole and a ventilation hole, the wire-tying hole and the ventilation hole penetrate the vacuum-formed isolation plate, and the wire-tying hole is located below the snap-fit ​​block, and the ventilation hole is located between two adjacent mounting slots.

[0011] Furthermore, the busbar includes a raised surface and a snap-fit ​​plate, the snap-fit ​​plate being located at the upper and lower ends of the raised surface, and the snap-fit ​​plate being snapped into the snap-fit ​​groove.

[0012] Furthermore, the raised surface is provided with studs, welding holes, and inspection holes. The studs are located at the upper and lower ends of the raised surface, the inspection holes correspond to the positions of the recessed holes on the battery cell, and the welding holes are located at the middle position of the raised surface.

[0013] Furthermore, the welding fixture is provided with a hollow groove, which extends along the length of the welding fixture, and the height of the hollow groove is the same as the height of the pole post.

[0014] Furthermore, the welding fixture has a first groove on the side facing the battery cell assembly. The first groove is recessed from the side of the welding fixture facing the battery cell assembly to the side away from the battery cell assembly. The connecting component is installed in the first groove, and the side of the connecting component with the mounting groove is in contact with the first groove.

[0015] Furthermore, the upper and lower ends of the hollow groove are provided with a second groove. The second groove is recessed from the side of the welding fixture away from the cell assembly to the side close to the cell assembly. The second groove is provided with a through hole, through which the stud passes.

[0016] Furthermore, the welding fixture has first fixing holes at both ends for cooperating with the fixing component, and the end plate has a second fixing hole corresponding to the first fixing hole. The welding fixture is connected to the end plate through the cooperation of the first fixing hole, the second fixing hole, and the fixing component.

[0017] Compared with existing technologies, the present invention has the following beneficial technical effects: This invention provides a battery module welding and assembly system. The connecting components adopt a vacuum-formed isolation plate and busbars. The vacuum-formed isolation plate has low mold opening costs, which can greatly reduce development costs and shorten the production cycle. The vacuum-formed isolation plate is highly flexible and can be divided into multiple sections. When the number of battery cells changes, existing vacuum-formed isolation plates can be used to match, which is highly flexible and easy to adjust. The press-fit studs on the busbars can be used to fix them to the welding fixtures, or after welding, the acquisition terminals can be inserted into the studs to fix the temperature / voltage acquisition terminals, which is highly compatible. The vacuum-formed isolation plate is provided with multiple busbar placement areas, and there are locking blocks at both ends for limiting the busbars, making it easy to assemble and disassemble the busbars. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly of the welding fixture and battery module in this invention.

[0019] Figure 2 This is an exploded view of the welding fixture and battery module assembly in this invention.

[0020] Figure 3 This is a schematic diagram of the battery cell assembly in this invention.

[0021] Figure 4 This is a schematic diagram of the battery cell structure in this invention.

[0022] Figure 5 This is a schematic diagram of the connecting component in this invention.

[0023] Figure 6 This is a schematic diagram of the structure of the vacuum-formed isolation panel in this invention.

[0024] Figure 7 This is a schematic diagram of the busbar structure in this invention.

[0025] Figure 8 This is a schematic diagram of the welding fixture facing the battery cell assembly in this invention.

[0026] Figure 9 This is a schematic diagram of the welding fixture facing away from the battery cell assembly in this invention.

[0027] Figure 10 This is a schematic diagram of the structure of the battery cell assembly after the connecting component and welding fixture are assembled.

[0028] Figure 11 This is a schematic diagram of the structure of the battery cell assembly after the connecting component and welding fixture are assembled in this invention.

[0029] in: 100-Battery Module; 10-Base; 20-End plate; 21-Second mounting hole; 30-Battery cell assembly; 31-Battery cell; 32-Terminal post; 33-Recessed hole; 40-Top connecting beam; 50-Connecting assembly; 51-Blaster-formed isolation plate; 511-Mounting groove; 512-Snap-fit ​​block; 513-Wire tie hole; 514-Ventilation hole; 52-Busbar; 521-Raised surface; 522-Snap-fit ​​plate; 523-Stud; 524-Welding hole; 525-Inspection hole; 60-Welding fixture; 61-Hollowed groove; 62-First groove; 63-Second groove; 64-Through hole; 65-First mounting hole. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] In the description of this invention, it should be noted that the orientations or positional relationships indicated in this description are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this invention and simplifying the description, and are not intended to indicate or imply that the parts or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0032] Please refer to the following: Figure 1-2 , Figure 5 , Figure 8-9 This invention provides a battery module welding assembly system, including a battery module 100 and welding fixtures 60 installed on both sides of the battery module 100. The battery module 100 includes at least a cell assembly 30 and a connecting assembly 50. The connecting assembly 50 includes a vacuum-formed separator 51 and a busbar 52. The busbar 52 is installed on the side of the vacuum-formed separator 51 facing away from the cell assembly 30, and the vacuum-formed separator 51 is installed on the side of the welding fixture 60 facing the cell assembly 30. The welding fixture provided by this invention, wherein the connecting assembly 50 adopts a combination of the vacuum-formed separator 51 and the busbar 52, has low mold opening costs, which can greatly reduce development costs and shorten the production cycle. Furthermore, the vacuum-formed separator 51 is highly flexible, as it can be divided into multiple sections. When the number of cells changes, existing vacuum-formed separators 51 can also be used to match, providing high flexibility.

[0033] Please see Figure 1 and Figure 2The battery module 100 also includes a base 10, end plates 20, and a top connecting beam 40. The base 10 is a sheet metal assembly bent and welded into one piece, used to support the weight of the battery cell assembly 30. Two end plates 20 are provided, respectively fixed to the two ends of the base 10. The battery cell assembly 30 is placed between the two end plates 20. The end plates 20 can compress the battery cell assembly 30, restricting its lateral movement. The top connecting beam 40 is located on the top of the battery cell assembly 30, and its two ends are connected to the top of the two end plates 20 respectively. The top connecting beam 40 can restrict the vertical movement of the battery cell assembly 30. A connecting component 50 and a welding fixture 60 are located on the front and rear sides of the battery cell assembly 30 for welding the battery cell assembly 30. The connecting component 50 and the welding fixture 60 have low mold opening costs, which can reduce costs, and are easy to assemble, disassemble, and adjust.

[0034] Please see Figure 3 and Figure 4 The battery cell assembly 30 includes multiple battery cells 31. Each battery cell 31 has a terminal post 32 on both sides, one side being a positive terminal post and the other side being a negative terminal post. The multiple battery cells 31 are arranged alternately between two end plates 20. Each terminal post 32 has a recessed hole 33 on its surface and at both ends. The recessed hole 33 is used to align the connecting assembly 50 with the battery cell 30 during installation, facilitating subsequent soldering work.

[0035] Please see Figure 5-7 The connecting component 50 includes a vacuum-formed isolation plate 51 and a busbar 52. The vacuum-formed isolation plate 51 is manufactured using a vacuum forming process, employing insulating materials. The vacuum forming mold is inexpensive, reducing manufacturing costs. A mounting groove 511 is provided on the side of the vacuum-formed isolation plate 51 facing away from the battery cell 31. The busbar 52 is installed within the mounting groove 511. Multiple mounting grooves 511 are provided, the number of which can be adjusted according to the number of battery cells 31, offering high flexibility and easy adjustment. The upper and lower ends of the mounting groove 511 are provided with snap-fit ​​blocks 512, forming snap-fit ​​grooves between the snap-fit ​​blocks 512 and the groove wall of the mounting groove 511. The upper and lower ends of the busbar 52 are snapped into these grooves, allowing the busbar 52 to be installed on the vacuum-formed isolation plate 51 through snap-fit, facilitating easy installation and removal.

[0036] Please see Figure 6 The vacuum-formed isolation plate 51 is provided with a wire-tying hole 513 and a ventilation hole 514. The wire-tying hole 513 and the ventilation hole 514 penetrate the vacuum-formed isolation plate 51, with the wire-tying hole 513 located below the snap-fit ​​block 512, and the ventilation hole 514 located between two adjacent mounting slots 511. The wire-tying hole 513 is used to bundle the wires, making the battery cell 31 look neat and tidy. The ventilation hole 514 is used for ventilation, and its position corresponds to the gap between adjacent battery cells 31, which enables the battery cell 31 to dissipate heat.

[0037] Please see Figure 7The busbar 52 is a conductor, integrally molded from conductive material. The busbar 52 includes a raised surface 521 and a snap-fit ​​plate 522. The snap-fit ​​plate 522 is located at the upper and lower ends of the raised surface 521, forming a U-shaped structure between them. The snap-fit ​​plate 522 is used to snap into the snap-fit ​​groove, mounting the busbar 52 onto the blister pack 51. The raised surface 521 is provided with studs 523, welding holes 524, and inspection holes 525. The studs 523 are located at the upper and lower ends of the raised surface 521. The stud 523 has threads and is installed in conjunction with a nut. The stud 523 is used to fix the busbar 52 to the welding fixture 60 and to fix the temperature / voltage acquisition terminal. The detection hole 525 corresponds to the recessed hole 33 on the battery cell 31. The detection hole 525 is used to observe whether the busbar 52 is aligned with the recessed hole 33 on the battery cell 31 pole post 32 and to check whether the busbar 52 is placed in place. The welding hole 524 is located in the middle of the raised surface 521. The welding hole 524 facilitates the positioning of the welding equipment during welding.

[0038] Please refer to 2. Figure 8 and Figure 9 The welding fixture 60 is an insulating plate formed by CNC milling. The welding fixture 60 has first mounting holes 65 at both ends for mating with the mounting parts. The end plate 20 has second mounting holes 21 corresponding to the first mounting holes 65. The welding fixture 60 is connected to the end plate 20 through the mating of the first mounting holes 65, the second mounting holes 21, and the mounting parts.

[0039] Please see Figure 8 and Figure 9 The welding fixture 60 is provided with a hollow groove 61, which runs through the entire welding fixture 60 and extends along the length of the welding fixture 60. The height of the hollow groove 61 is the same as the height of the pole post 32. The hollow groove 61 is used for welding the battery cell 31.

[0040] Furthermore, the welding fixture 60 has a first groove 62 on the side facing the cell assembly 30. The first groove 62 is recessed from the side of the welding fixture 60 facing the cell assembly 30 to the side away from the cell assembly 30. The first groove 62 does not penetrate through the cell assembly 30. The height and length of the first groove 62 correspond to the height and length of the connecting component 50, so that the connecting component 50 can be installed in the first groove 62. During installation, the side of the connecting component 50 with the mounting groove 511 fits against the first groove 62.

[0041] Furthermore, the upper and lower ends of the hollow groove 61 are provided with second grooves 63. The second grooves 63 are recessed from the side of the welding fixture 60 away from the cell assembly 30 to the side closer to the cell assembly 30. The second grooves 63 are not through-holes, but have through holes 64 through which studs 523 pass. At this time, the studs 523 of the busbar 52 are exposed outside the welding fixture 60, which can be used to fix the busbar 523 to the welding fixture 60, or after welding is completed, the acquisition terminals can be inserted into the studs 523 to fix the temperature / voltage acquisition terminals, which has high compatibility. The deformation of the welding fixture 60 is small, meeting the requirement of flatness ≤1mm.

[0042] The disassembly and assembly process of the battery module welding and assembly system provided by this invention is as follows: The first step is to place the battery cells 31 alternately on the base 10, and fix and limit the battery cells 31 by the end plates 20 on both sides and the top connecting beam 40; The second step is to fix the busbar 52 through the snap-fit ​​groove of the vacuum-formed isolation plate 51, so that the busbar 52 and the vacuum-formed isolation plate 51 are integrated. Then, the connecting component 50 is placed into the first groove 62 of the welding fixture 60, and the studs 523 of the busbar 52 are aligned with the through holes 64 of the welding fixture 60 and inserted, so that the connecting component 50 is installed on the welding fixture 60. The studs 523 on one side are used to fix the nut, and the studs 523 on the other side are used to fix the temperature / voltage acquisition terminal. The third step is to fix the welding fixture 60 to the end plates 20 at both ends through the mounting parts. At this time, it can be observed that the detection hole 525 of the busbar 52 is aligned with the recessed holes 33 on the upper and lower ends of the terminal post 32 of the battery cell 31. Under the pressure of the welding fixture 60, the inner side of the protruding surface 521 of the busbar 52 is attached to the terminal post 32 of the battery cell 31. Then, the welding equipment is used to weld the battery cell 31 so that the battery cells 31 are connected in series. Fourth step: After welding is completed, disassemble the mounting parts between welding fixture 60 and end plate 20, and then remove welding fixture 60.

[0043] As described above, the battery module welding and assembly system provided by this invention uses a vacuum-formed isolation plate 51 and a busbar 52 as the connecting component 50. The vacuum-formed isolation plate 51 has low mold opening costs, which can greatly reduce development costs and shorten the production cycle. The vacuum-formed isolation plate 51 is highly flexible and can be divided into multiple sections. When the number of battery cells 31 changes, an existing vacuum-formed isolation plate 51 can be used to match, which is highly flexible and easy to adjust. The press-fit studs 523 on the busbar 52 can be used to fix it with the welding fixture 60, or after welding, the acquisition terminals can be inserted into the studs 523 to fix the temperature / voltage acquisition terminals, which is highly compatible. The vacuum-formed isolation plate 51 is provided with multiple busbar 52 placement areas, and the two ends are provided with snap-fit ​​blocks 512 for limiting the busbar 52. The busbar 52 is easy to disassemble and assemble.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. 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 some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A battery module welding and assembly system, characterized in that: The battery module (100) includes a battery module (100) and welding fixtures (60) installed on both sides of the battery module (100). The battery module (100) includes at least a cell assembly (30) and a connecting assembly (50). The connecting assembly (50) includes a vacuum-formed isolation plate (51) and a busbar (52). The busbar (52) is installed on the side of the vacuum-formed isolation plate (51) facing away from the cell assembly (30). The vacuum-formed isolation plate (51) is installed on the side of the welding fixture (60) facing the cell assembly (30).

2. The battery module welding and assembly system according to claim 1, characterized in that: The battery module (100) also includes a base (10), an end plate (20), and a top connecting beam (40). The end plate (20) is installed at both ends of the base (10), the cell assembly (30) is disposed between the end plates (20), and the top connecting beam (40) is disposed at the top of the cell assembly (30) and connected to the end plate (20).

3. The battery module welding and assembly system according to claim 2, characterized in that: The battery cell assembly (30) includes a plurality of battery cells (31), and the battery cells (31) are provided with terminals (32) on both sides, and the terminals (32) are provided with recessed holes (33) at the upper and lower ends.

4. The battery module welding and assembly system according to claim 3, characterized in that: The thermoformed isolation plate (51) has a mounting groove (511) on the side facing away from the battery cell assembly (30), and the busbar (52) is installed in the mounting groove (511).

5. The battery module welding and assembly system according to claim 4, characterized in that: The mounting groove (511) is provided with snap-fit ​​blocks (512) at both the upper and lower ends. The snap-fit ​​blocks (512) and the groove wall of the mounting groove (511) form a snap-fit ​​groove, and the upper and lower ends of the busbar (52) are snapped into the snap-fit ​​groove.

6. The battery module welding and assembly system according to claim 5, characterized in that: The vacuum-formed partition plate (51) is provided with a wire-tying hole (513) and a ventilation hole (514). The wire-tying hole (513) and the ventilation hole (514) penetrate the vacuum-formed partition plate (51). The wire-tying hole (513) is located below the snap-fit ​​block (512), and the ventilation hole (514) is located between two adjacent mounting slots (511).

7. The battery module welding and assembly system according to claim 5, characterized in that: The busbar (52) includes a raised surface (521) and a snap-fit ​​plate (522). The snap-fit ​​plate (522) is located at the upper and lower ends of the raised surface (521) and snaps into the snap-fit ​​groove.

8. The battery module welding and assembly system according to claim 7, characterized in that: The raised surface (521) is provided with a stud (523), a welding hole (524) and a detection hole (525). The stud (523) is located at the upper and lower ends of the raised surface (521). The detection hole (525) corresponds to the position of the recessed hole (33) on the battery cell (31). The welding hole (524) is located at the middle position of the raised surface (521).

9. The battery module welding and assembly system according to claim 8, characterized in that: The welding fixture (60) is provided with a hollow groove (61), which extends along the length of the welding fixture (60), and the height of the hollow groove (61) is the same as the height of the pole post (32).

10. The battery module welding and assembly system according to claim 6, characterized in that: The welding fixture (60) has a first groove (62) on the side facing the cell assembly (30). The first groove (62) is recessed from the side of the welding fixture (60) facing the cell assembly (30) to the side away from the cell assembly (30). The connecting component (50) is installed in the first groove (62), and the side of the connecting component (50) with the mounting groove (511) is in contact with the first groove (62).

11. The battery module welding and assembly system according to claim 9, characterized in that: The upper and lower ends of the hollow groove (61) are provided with a second groove (63). The second groove (63) is recessed from the side of the welding fixture (60) away from the cell assembly (30) to the side close to the cell assembly (30). The second groove (63) is provided with a through hole (64), and the stud (523) passes through the through hole (64).

12. The battery module welding and assembly system according to claim 2, characterized in that: The welding fixture (60) has first fixing holes (65) at both ends for cooperating with the fixing component, and the end plate (20) has second fixing holes (21) corresponding to the first fixing holes (65). The welding fixture (60) is connected to the end plate (20) through the cooperation of the first fixing holes (65), the second fixing holes (21) and the fixing component.

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