Anti-sinking all-tab cap structure

Abstract

The utility model relates to an anti-sinking full-tab cap structure which comprises a cap main body, the cap main body is provided with an anti-sinking part which protrudes upwards; the anti-sinking part comprises a first convex part and a second convex part; the first protruding part is arranged on the periphery of the second protruding part. According to the anti-sinking full-tab cap structure provided by the utility model, the upward counter-acting force is provided by the anti-sinking part which protrudes upwards, so that the cap main body is prevented from sinking downwards, and the production yield and the safety of a battery cell are improved.

Description

Technical Field

[0001] This utility model belongs to the field of full-tab battery technology, specifically relating to a dent-resistant full-tab cap structure. Background Technology

[0002] All-tab batteries are high-performance batteries with higher energy density and faster charge and discharge rates, but they also place higher demands on the safety of the battery cells.

[0003] The cap is a crucial structural element for ensuring the safety of the battery cell. Traditional cap designs use flat steel plates. Because the sealing force of the cap's edge is downward, a concave cap problem can easily occur during the sealing process, meaning the center of the cap dips downward. This poses a risk of short circuit to the cell, affecting battery performance and safety. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a dent-resistant full-pole lug cap structure. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] A dent-resistant full-ear cap structure, comprising: a cap body;

[0006] The cap body is provided with an upwardly protruding anti-dent part;

[0007] The anti-dent portion includes: a first protrusion and a second protrusion;

[0008] The first protrusion is disposed around the periphery of the second protrusion.

[0009] In one feasible embodiment, the cap body has a liquid injection hole at its center.

[0010] In one feasible implementation, both the first protrusion and the second protrusion are annular protrusion structures.

[0011] In one feasible manner, the injection hole, the first protrusion, and the second protrusion are concentrically arranged.

[0012] In one feasible embodiment, the distance between the first protrusion and the second protrusion is less than the distance between the second protrusion and the injection hole.

[0013] In one feasible implementation, the annular width of the first protrusion is greater than the annular width of the second protrusion.

[0014] In one feasible approach, the first protrusion is provided with an opening etched line.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The anti-denting full-tab cap structure provided by this utility model provides an upward reaction force through the upwardly protruding anti-denting part, preventing the cap body from denting downward, thereby improving the production yield and safety of the battery cell. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a dent-resistant full-pole lug cap structure according to an embodiment of this utility model;

[0018] Figure 2 This is a top view of a dent-resistant full-pole lug cap structure according to an embodiment of this utility model;

[0019] Figure 3 This is a front view of a dent-resistant full-pole ear cap structure according to an embodiment of this utility model.

[0020] Figure label:

[0021] 100: Cap body; 110: Anti-dent part; 111: First protrusion; 1111: Opening etched line; 112: Second protrusion; 120: Injection hole. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0023] Example 1

[0024] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a cross-sectional view of a dent-resistant full-pole lug cap structure according to an embodiment of this utility model. Figure 2 This is a top view of a dent-resistant full-pole lug cap structure according to an embodiment of this utility model. Figure 3 This is a front view of a dent-resistant full-pole ear cap structure according to an embodiment of this utility model.

[0025] This embodiment provides a dent-resistant full-ear cap structure, comprising: a cap body 100. The cap body 100 is provided with an upwardly protruding dent-resistant portion 110. The dent-resistant portion 110 includes: a first protrusion 111 and a second protrusion 112. The first protrusion 111 is disposed around the second protrusion 112.

[0026] Specifically, during the edge sealing process, when the cap body 100 is compressed, the upwardly protruding anti-dent portion 110 acts as a reinforcing rib. The anti-dent portion 110 provides an upward reaction force to prevent the cap body 100 from denting downward, thereby improving the production yield and safety of the battery cell. At the same cross-section, the upwardly protruding sidewalls of the first protrusion 111 and the second protrusion 112 are equivalent to eight bends, which can better provide an upward force and balance the pressure on the cap body 100.

[0027] In this embodiment, the cap body 100 has a liquid injection hole 120 at its center. The liquid injection hole 120 is used to inject electrolyte into the battery after the battery cell is assembled, forming an ion-conducting pathway.

[0028] In this embodiment, both the first protrusion 111 and the second protrusion 112 are annular protrusion structures. The injection hole 120, the first protrusion 111, and the second protrusion 112 are concentrically arranged.

[0029] Combination Figure 1 and Figure 2 The cap body 100 has a circular outline, and the injection hole 120 is a circular hole opened in the center of the cap body 100. The second protrusion 112 is located around the injection hole 120, and the first protrusion 111 is located around the second protrusion 112. The first protrusion 111 and the second protrusion 112 are circumferentially raised. The first protrusion 111 and the second protrusion 112 at the same cross section form a "bow" shaped bending structure, which can achieve isotropic resistance to the pressure on the cap body 100 in different directions.

[0030] In this embodiment, the distance between the first protrusion 111 and the second protrusion 112 is less than the distance between the second protrusion 112 and the injection hole 120. The annular width of the first protrusion 111 is greater than the annular width of the second protrusion 112.

[0031] Specifically, the ring width, protrusion height, radius (R-angle), and position of the first protrusion 111 and the second protrusion 112 can all adjust the bending resistance of the cap body 100. These can be adjusted according to process requirements during actual production. For example, a rounded corner design can smooth the cross-sectional transition, avoiding sudden changes in local stiffness caused by sharp corners, thereby distributing the bending moment load more evenly. The ring width, protrusion height, and position are all related to the load on the cap body 100. In this embodiment, since the cap body 100 has a liquid injection hole 120 at its center, the distance between the second protrusion 112 and the liquid injection hole 120 is set to be greater than the distance between the first protrusion 111 and the second protrusion 112. That is, based on the conventional spacing between the two protrusions, the distance between the second protrusion 112 and the liquid injection hole 120 is larger to avoid the stress concentration area of ​​the central opening. Furthermore, a wider ring surface of the protrusion can provide better support and reduce local deformation, but an excessively wide ring surface may lead to material accumulation, increasing the difficulty of closing the opening.

[0032] In this embodiment, the first protrusion 111 is provided with an opening etched line 1111, which is used to enable controllable opening under specific conditions such as excessive internal pressure of the battery or the need for maintenance.

[0033] This embodiment provides a dent-resistant full-tab cap structure. The upwardly protruding dent-resistant portion 110 provides an upward reaction force to prevent the cap body 100 from denting downwards, thereby improving the cell's production yield and safety. The dent-resistant full-tab cap structure provided in this embodiment effectively prevents cap denting and deformation. Compared to traditional cap designs, it is simple and reasonable, easy to process, and applicable to other types of large cylindrical cells, showing broad application prospects.

[0034] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A depression-preventing full-tab cap structure, characterized by, The utility model relates to a cap body (100) is provided with the anti-sinking part (110) that protrudes upwards on the cap body (100); The anti-sinking part (110) includes: first protruding part (111) and second protruding part (112); The first protruding part (111) is arranged at the periphery of the second protruding part (112). The center of the cap body (100) is provided with a liquid injection hole (120). The first protruding part (111) and the second protruding part (112) are annular protruding structures.

2. The anti-dishing full-tab lidding structure of claim 1, wherein, The liquid injection hole (120), the first protruding part (111) and the second protruding part (112) are concentrically arranged.

3. The anti-sag full tab lidding structure of claim 2, wherein, The distance between the first protruding part (111) and the second protruding part (112) is less than the distance between the second protruding part (112) and the liquid injection hole (120).

4. The anti-sag full tab lidding structure of claim 3, wherein, The ring width of the first protruding part (111) is greater than the ring width of the second protruding part (112).

5. The anti-sag full tab lidding structure of claim 4, wherein, The first protruding part (111) is provided with an opening notch (1111).

6. The anti-dishing full-tab lidding structure of claim 5, wherein, ​ 7. The anti-dishing full-tab lidding structure of claim 1, wherein, ​

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