Welding positioning tool for lithium battery cover plate

Abstract

The utility model relates to the technical field of lithium battery cover plate welding tools, in particular to a lithium battery cover plate welding positioning tool which comprises a lower die base, an upper die base and a pressing block. A positive pole stepped groove and a negative pole stepped groove are formed in the end face, facing the upper die base, of the lower die base, the large-groove-diameter ends of the positive pole stepped groove and the negative pole stepped groove are closer to the upper die base than the small-groove-diameter ends of the positive pole stepped groove and the negative pole stepped groove, and the maximum groove diameter of the positive pole stepped groove is larger than the maximum groove diameter of the negative pole stepped groove. Welding avoiding holes corresponding to the positive pole stepped groove and the negative pole stepped groove are formed in the upper die holder; the pressing block is located between the lower die base and the upper die base and provided with a through hole used for exposing a pole welding area to the welding receding hole. According to the utility model, the situation of wrong assembly of the lithium battery cover plate can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tooling for lithium battery covers, and particularly relates to a welding positioning tooling for lithium battery covers. Background Art

[0002] The lithium battery cover is one of the important components of the lithium battery, and its main function is to prevent the electrolyte from leaking. At present, after the relevant accessories of the lithium battery cover are assembled on the tooling manually, the tooling and the cover are sent into the welding machine together for welding. However, during the assembly process of the lithium battery cover, due to the small difference in the pole columns, incorrect assembly often occurs, resulting in product scrapping finally. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a welding positioning tooling for lithium battery covers that can prevent mistakes and reduce the occurrence of incorrect assembly of lithium battery covers.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: a welding positioning tooling for lithium battery covers, including a lower die base and an upper die base that are spliced with each other, and a pressing block;

[0005] On one end face of the lower die base facing the upper die base, a positive pole column stepped groove and a negative pole column stepped groove are arranged. The large-diameter ends of the positive pole column stepped groove and the negative pole column stepped groove are closer to the upper die base than their small-diameter ends. The maximum diameter of the positive pole column stepped groove is larger than the maximum diameter of the negative pole column stepped groove;

[0006] Welding avoidance holes corresponding to the positive pole column stepped groove and the negative pole column stepped groove are arranged on the upper die base;

[0007] The pressing block is located between the lower die base and the upper die base, and a through hole for exposing the pole column welding area to the welding avoidance hole is arranged on the pressing block.

[0008] Further, the maximum diameter of the positive pole column stepped groove is 1 mm to 1.2 mm larger than the maximum diameter of the negative pole column stepped groove.

[0009] Further, a plurality of limiting blocks are arranged on one end face of the lower die base facing the upper die base, and the limiting blocks enclose a limiting space.

[0010] Further, a chamfer is arranged at one end of the top of the limiting block facing the limiting space.

[0011] Further, a foolproof positioning post is arranged on one end face of the lower die base facing the upper die base.

[0012] Further, an assembly post is arranged on one end face of the lower die base facing the upper die base, and an assembly hole for inserting the assembly post is arranged on the upper die base.

[0013] Further, the fitting hole and the fitting post are in frictional fit.

[0014] Further, a handle is provided on the lower die base.

[0015] The beneficial effects of the present utility model are as follows: By utilizing the feature that the outer diameter of the positive pole post is larger than that of the negative pole post, that is, the outer diameter of the upper plastic sleeve on the positive pole post is larger than that of the upper plastic sleeve on the negative pole post, a negative pole post stepped groove and a positive pole post stepped groove are added on the lower die base, and the maximum groove diameter of the positive pole post stepped groove is larger than that of the negative pole post stepped groove. After the positive pole post and the negative pole post are placed in the corresponding positive pole post stepped groove and negative pole post stepped groove, if the positive pole post and the negative pole post are placed incorrectly, the staff cannot sleeved the upper plastic on the positive pole post located in the negative pole post stepped groove. At the same time, the negative pole post with the upper plastic sleeved thereon will be unstable in the positive pole post stepped groove and there will be a shaking situation. Thus, the assembler can quickly judge that the pole post is placed incorrectly. After the placement of the pole post is completed, the assembler can continue to assemble the light aluminum sheet, the lower plastic and the sealing ring on the pole post in sequence. Then, the pressing block is pressed on the welding ring of the pole post, and the welding area of the pole post is exposed through the through hole. Finally, the upper die base is spliced to the lower die base to fix the pressing block, thereby preventing the relevant accessories from moving during the welding process. Description of the Drawings

[0016] Figure 1 is an exploded structural view of a welding positioning tooling for a lithium battery cover plate of the present utility model;

[0017] Figure 2 is a structural view of the lower die base of a welding positioning tooling for a lithium battery cover plate of the present utility model;

[0018] Figure 3 is an assembly structural view of the negative pole post of a welding positioning tooling for a lithium battery cover plate of the present utility model in the negative pole post stepped groove;

[0019] Label Description:

[0020] 1. Lower die base; 11. Positive pole post stepped groove; 12. Negative pole post stepped groove; 13. Limit block; 14. Anti-fooling positioning post; 15. Fitting post; 16. Handle; 17. First assembly mark; 18. Weight reduction hole;

[0021] 2. Upper die base; 21. Welding avoidance hole; 22. Fitting hole; 23. Second assembly mark;

[0022] 3. Pressing block; 31. Through hole;

[0023] 4. Upper plastic. Detailed Embodiment

[0024] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with the embodiments and with reference to the drawings.

[0025] Please refer to Figures 1 to 3 As shown, a welding positioning tooling for a lithium battery cover plate of the present utility model includes a lower die base 1 and an upper die base 2 that are spliced together, and a pressing block 3;

[0026] On one end face of the lower die base 1 facing the upper die base 2, a positive electrode column stepped groove 11 and a negative electrode column stepped groove 12 are provided. The large-diameter ends of the positive electrode column stepped groove 11 and the negative electrode column stepped groove 12 are closer to the upper die base 2 than their small-diameter ends, and the maximum diameter of the positive electrode column stepped groove 11 is greater than the maximum diameter of the negative electrode column stepped groove 12;

[0027] On the upper die base 2, welding avoidance holes 21 corresponding to the positive electrode column stepped groove 11 and the negative electrode column stepped groove 12 are provided;

[0028] The pressing block 3 is located between the lower die base 1 and the upper die base 2, and a through hole 31 for exposing the electrode column welding area to the welding avoidance hole 21 is provided on the pressing block 3.

[0029] Among them, preferably, the maximum diameter of the positive electrode column stepped groove 11 is 1 mm to 1.2 mm greater than the maximum diameter of the negative electrode column stepped groove 12.

[0030] Working principle: Utilizing the feature that the outer diameter of the positive electrode column is larger than the outer diameter of the negative electrode column, that is, the outer diameter of the upper plastic 4 sleeved on the positive electrode column is larger than the outer diameter of the upper plastic 4 sleeved on the negative electrode column, a negative electrode column stepped groove 12 and a positive electrode column stepped groove 11 are added on the lower die base 1, and the maximum diameter of the positive electrode column stepped groove 11 is greater than the maximum diameter of the negative electrode column stepped groove 12. After the positive electrode column and the negative electrode column are placed in the corresponding positive electrode column stepped groove 11 and negative electrode column stepped groove 12, if the positive electrode column and the negative electrode column are placed wrongly, the staff cannot sleeve the upper plastic 4 on the positive electrode column located in the negative electrode column stepped groove 12. At the same time, the negative electrode column with the upper plastic 4 sleeved will be unstable in the positive electrode column stepped groove 11 and there will be a shaking situation. Thus, the assembly personnel can quickly judge that the electrode columns are placed wrongly. After the placement of the electrode columns is completed, the assembly personnel can continue to assemble the light aluminum sheet, the lower plastic and the sealing ring on the electrode columns in sequence. Then, press the pressing block 3 on the welding ring of the electrode columns, and expose the electrode column welding area through the through hole 31. Finally, splice the upper die base 2 to the lower die base 1 to fix the pressing block 3, thereby preventing the relevant accessories from moving during the welding process.

[0031] In one embodiment, please refer to Figure 1 and Figure 2As shown, a plurality of limiting blocks 13 are arranged on one end face of the lower die base 1 facing the upper die base 2, and the limiting blocks 13 enclose to form a limiting space. By using the limiting blocks 13 to enclose and form a limiting space, the light aluminum sheet can be placed in the limiting space to position the light aluminum sheet and prevent the light aluminum sheet from moving during subsequent assembly or welding processes.

[0032] In one embodiment, a chamfer is arranged at one end of the top of the limiting block 13 facing the limiting space. The chamfer can facilitate the assembler to put the light aluminum sheet into the limiting space.

[0033] In one embodiment, please refer to Figure 1 and Figure 2 As shown, a foolproof positioning post 14 is arranged on one end face of the lower die base 1 facing the upper die base 2. By using the foolproof positioning post 14 to pass through the liquid injection hole on the light aluminum sheet, it can be avoided that the light aluminum sheet is placed in the wrong direction in the limiting space, further ensuring the reliability of assembly.

[0034] In one embodiment, please refer to Figure 1 and Figure 2 As shown, an assembly post 15 is arranged on one end face of the lower die base 1 facing the upper die base 2, and an assembly hole 22 for the assembly post 15 to be inserted is arranged on the upper die base 2. Through the cooperation of the assembly post 15 and the assembly hole 22, the splicing of the lower die base 1 and the upper die base 2 can be completed quickly.

[0035] In an alternative embodiment, a frictional fit is provided between the assembly hole 22 and the assembly post 15. The frictional fit not only facilitates the splicing of the lower die base 1 and the upper die base 2, but also can ensure the reliability after the lower die base 1 and the upper die base 2 are spliced.

[0036] In one embodiment, please refer to Figure 1 and Figure 2 As shown, a handle 16 is arranged on the lower die base 1. After the lower die base 1 and the upper die base 2 are spliced, the assembler can send the tooling into the welding machine through the handle 16 and make the welding avoidance hole 21 be located below the welding torch of the welding machine.

[0037] In an alternative embodiment, a first assembly mark 17 is arranged on the lower die base 1, and the assembler can judge the installation areas of the positive pole post and the negative pole post on the lower die base 1 through the first assembly mark 17. A second assembly mark 23 is arranged on the upper die base 2, and the assembler can avoid the situation of incorrect splicing between the upper die base 2 and the lower die base 1 through the second assembly mark 23.

[0038] In an alternative embodiment, a weight reduction hole 18 is arranged on the lower die base 1. Through the weight reduction hole 18, the weight of the lower die base 1 can be reduced to facilitate the assembler to carry.

[0039] The above are only embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A welding positioning tooling for a lithium battery cover plate, characterized in that: It includes a lower die base and an upper die base that are spliced with each other, as well as a pressing block; On one end face of the lower die base facing the upper die base, there are a positive pole column stepped groove and a negative pole column stepped groove. The large groove diameter ends of the positive pole column stepped groove and the negative pole column stepped groove are closer to the upper die base than their small groove diameter ends. The maximum groove diameter of the positive pole column stepped groove is larger than the maximum groove diameter of the negative pole column stepped groove; On the upper die base, there are welding avoidance holes corresponding to the positive pole column stepped groove and the negative pole column stepped groove; The pressing block is located between the lower die base and the upper die base, and there are through holes on the pressing block for exposing the pole column welding area to the welding avoidance holes.

2. The welding positioning tooling for the lithium battery cover plate according to claim 1, wherein: The maximum groove diameter of the positive pole column stepped groove is 1 mm to 1.2 mm larger than the maximum groove diameter of the negative pole column stepped groove.

3. The welding positioning tooling for the lithium battery cover plate according to claim 1, characterized in that: On one end face of the lower die base facing the upper die base, there are a plurality of limiting blocks, and the limiting blocks enclose to form a limiting space.

4. The welding positioning tooling for the lithium battery cover plate according to claim 3, wherein: The top of the limiting block is provided with a chamfer at one end facing the limiting space.

5. The welding positioning tooling for the lithium battery cover plate according to claim 1 or 3, characterized in that: On one end face of the lower die base facing the upper die base, there is an anti-fooling positioning post.

6. The welding positioning tooling for the lithium battery cover plate according to claim 1, characterized in that: On one end face of the lower die base facing the upper die base, there are assembly posts, and on the upper die base, there are assembly holes for the assembly posts to be inserted.

7. The welding positioning tooling for the lithium battery cover plate according to claim 6, characterized in that: There is a friction fit between the assembly hole and the assembly post.

8. The welding positioning tooling for the lithium battery cover plate according to claim 1, wherein: A handle is provided on the lower die base.

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