A cell cover and a cell

By using the interlocking structure of the aluminum explosion-proof valve and the cover plate body, the problems of potential difference corrosion and processing difficulty in the welding connection between the steel explosion-proof valve and the cover plate are solved, realizing efficient and stable explosion-proof valve installation and improving the safety and processing accuracy of the battery cell.

CN121840039BActive Publication Date: 2026-06-30SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SVOLT ENERGY TECHNOLOGY CO LTD
Filing Date
2026-03-12
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing technology, the welded connection between the steel explosion-proof valve and the steel cover plate has the problem of potential difference corrosion, and the processing is difficult and inefficient, which affects mass production and safety.

Method used

An aluminum explosion-proof valve is fitted with a stepped section of the cover plate body. The explosion-proof valve is fixed to the cover plate by the first sealing element and the first terminal, avoiding welding operations and ensuring stable installation and high precision of the explosion-proof valve.

Benefits of technology

This achieves stable fixing of the explosion-proof valve and the cover plate, improves processing accuracy and assembly efficiency, ensures stable detonation value, and enhances the safety performance and airtightness of the battery cell.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN121840039B_ABST
    Figure CN121840039B_ABST
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Abstract

This invention belongs to the field of battery technology, specifically disclosing a cell cover and a cell. The cell cover comprises a cover body, a first plastic part, and a first terminal stacked sequentially along a first direction. The cover body has a first through hole and a stepped portion located circumferentially to the first through hole. The stepped portion is located on the side of the cover body near the electrode assembly, and the circumferential edge of the explosion-proof valve is embedded in the stepped portion. The first plastic part has a second through hole, and a first sealing member is annular and located within the second through hole. The first terminal is fixed to the cover body, and the first sealing member is pressed against the explosion-proof valve and the cover body through the first terminal to seal the gap between the first terminal and the cover body. By adopting the above assembly structure, no welding operation is required when assembling the explosion-proof valve and the cover body, resulting in low assembly difficulty, high assembly efficiency, high processing accuracy of the explosion-proof valve, and stable detonation value. This invention also provides a cell, including the above-mentioned cell cover.
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