一种顶盖组件、电池和用电设备

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By employing a dual-sealing structure in the top cover assembly and utilizing the vent gap to detect gas leakage, the problem of poor sealing performance of the sealing assembly was solved, reliable sealing of the liquid injection hole was achieved, and the overall sealing performance of the battery was improved.

CN224520157UActive Publication Date: 2026-07-17CHANGZHOU RED FAIRY PRECISION TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHANGZHOU RED FAIRY PRECISION TECHNOLOGY CO LTD
Filing Date: 2025-07-04
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In the prior art, the sealing components of the top cover assembly have poor sealing performance, making it difficult to effectively seal after electrolyte injection.

Method used

It adopts a dual sealing structure, including a first sealing part and a second sealing part. The first sealing part forms a venting gap with the inner circumferential surface of the injection hole, and gas leakage is detected at the second sealing part to ensure the reliability of the second sealing part.

Benefits of technology

It improves the sealing reliability of the injection hole, enables timely detection and handling of false seals, ensures no leakage of gas inside the battery, and enhances the stability and reliability of the sealing components.

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Abstract

本申请提供一种电池的顶盖组件、电池和用电设备；顶盖组件包括盖板和密封部件，盖板设有注液孔，密封部件包括第一密封部和第二密封部，第一密封部至少部分设置于注液孔内，第一密封部与注液孔的内周面之间形成有通气间隙，通气间隙用于连通至电池的壳体内部，第二密封部位于第一密封部远离电池的卷芯的一侧，第二密封部与盖板密封连接，以密封注液孔以及通气间隙。本申请的顶盖组件具有注液孔密封效果好的优点。

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Claims

1. A cap assembly (300) characterized by, include: Cover plate (31), the cover plate (31) is provided with injection hole (311); and, A sealing component (34) includes a first sealing part (3411) and a second sealing part (3421). The first sealing part (3411) is at least partially disposed within the injection hole (311). A venting gap (317) is formed between the first sealing part (3411) and the inner circumferential surface of the injection hole (311). The venting gap (317) is used to communicate with the interior of the battery housing (100). The second sealing part (3421) is located on the side of the first sealing part (3411) away from the core (200) of the battery. The second sealing part (3421) is sealed to the cover plate (31) to seal the injection hole (311) and the venting gap (317).

2. The roof assembly (300) according to claim 1, characterized in that The inner wall of the injection hole (311) is formed with a venting groove (318) to form at least a partial venting gap (317).

3. The top cover assembly (300) according to claim 2, characterized in that, The width of the ventilation slot (318) is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

4. The header assembly (300) of claim 2, wherein, The cover plate (31) includes an inner surface (316) facing the core (200); The inner wall of the injection hole (311) includes a first inner circumferential surface (312) connected to the inner surface (316), and the vent groove (318) is at least partially located on the first inner circumferential surface (312) for communication with the interior of the battery housing (100).

5. The header assembly (300) of claim 2, wherein, The cross-section of the ventilation groove (318) is triangular, trapezoidal or semi-circular.

6. The header assembly (300) of claim 2, wherein, The number of ventilation slots (318) is one.

7. The roof assembly (300) of claim 2, wherein, The number of the ventilation grooves (318) is at least two, and the at least two ventilation grooves (318) are arranged at intervals along the circumference of the injection hole (311).

8. The roof assembly (300) according to any one of claims 1 to 7, characterized in that The cover plate (31) includes an outer surface (315) facing away from the core (200), and the inner wall of the injection hole (311) also includes a second inner circumferential surface (314) and a stepped surface (313), wherein the second inner circumferential surface (314) is connected between the outer surface (315) and the stepped surface (313); At least one of the outer surface (315), the second inner circumferential surface (314), and the stepped surface (313) is welded and fixed to the second sealing part (3421).

9. A battery, characterized by include: The housing (100) is provided with a receiving cavity and an opening, the opening communicating with the receiving cavity; A core (200) disposed within the receiving cavity; and, The top cover assembly (300) as claimed in any one of claims 1 to 8, wherein the top cover assembly (300) is connected to the housing (100) to close the opening.

10. An electric device, characterized by Includes the battery as described in claim 9.