Cover plate structure and battery cell

By designing a helium detection port and adhesive layer avoidance area away from the injection hole on the battery cover, combined with the barrier, the problem of electrolyte overflow and contamination of the explosion-proof valve is solved, and the safety and detection accuracy of the battery are improved.

CN222168484UActive Publication Date: 2024-12-13SVOLT ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420107705.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-16
Publication Date
2024-12-13
Estimated Expiration
2034-01-16

AI Technical Summary

Technical Problem

The explosion-proof valve on the battery cover plate is easily contaminated due to the overflow of the electrolyte, which poses a safety hazard. In the prior art, the injection hole and the explosion-proof valve are usually designed on the same side of the pole column, which makes it difficult to avoid contamination when the electrolyte overflows.

Method used

A cover plate structure is designed in which a helium detection port is provided on the protective sheet, away from the injection hole, and a adhesive layer is applied to the edge of the protective sheet to form a barrier area to reduce the risk of electrolyte entering the explosion-proof valve, while blocking the electrolyte through a barrier Flow to the explosion-proof valve hole.

Benefits of technology

It effectively reduces the risk of electrolyte entering the surface of the explosion-proof valve through the protective sheet, improves the safety and detection accuracy of the battery, and avoids the problem of impurities entering due to inaccurate helium detection port area.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222168484U_ABST
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Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate structure and a battery cell, the cover plate structure comprises: a plate body provided with an explosion-proof valve hole and a liquid injection hole, the explosion-proof valve hole and the liquid injection hole being arranged at an interval; the protection piece covers the anti-explosion valve hole, a helium detection opening is formed in the protection piece, the helium detection opening is located in the side, away from the liquid injection hole, of the protection piece, and at least part of the helium detection opening is overlapped with the projection of the anti-explosion valve hole in the direction perpendicular to the plate body; the circumferential edge of the side, facing the plate body, of the protection piece is coated with a bonding layer, the bonding layer and the edge, surrounding the anti-explosion valve hole, of the plate body are bonded, and an avoiding area is formed in the area, close to the helium detection opening, of the bonding layer. According to the cover plate structure provided by the utility model, the helium detection port can be far away from the liquid injection hole, and the difficulty that electrolyte overflowing from the liquid injection hole flows to the helium detection port and enters the surface of the anti-explosion valve is increased, so that the risk that the electrolyte enters the surface of the anti-explosion valve through a protection sheet to pollute the anti-explosion valve is reduced.
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Citation Information

Cited By

  • Battery cell protection structure, battery cell cover plate and battery cell

    CN120414022A