Top cover and battery

By setting a flow stopper on the battery cover and the sealing nails, the welding problem caused by residual electrolyte around the liquid injection hole is solved, and the effect of improving product pass rate and battery safety is achieved.

CN222690783UActive Publication Date: 2025-03-28BEIJING ELECTRIC VEHICLE
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Patent Information

Application Number
CN202420920561.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-29
Publication Date
2025-03-28
Estimated Expiration
2034-04-29

AI Technical Summary

Technical Problem

In the prior art, residual electrolyte around the injection hole leads to poor welding, increasing the potential safety risks of the battery and product defect rate.

Method used

By providing a flow stopper on the top cover and the sealing nails, the cleanliness and surface flatness of the welding part of the liquid injection hole are improved, and the welding process is avoided.

Benefits of technology

It effectively improves product qualification rate, reduces potential safety risks, improves battery safety and reliability, and saves liquid injection hole cleaning process and improves production efficiency.

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Abstract

The top cover comprises a body and a sealing nail, the body is provided with a liquid injection hole and a flow blocking part, and the flow blocking part is located on the periphery of the liquid injection hole, extends away from the body in the axial direction and is spaced from the liquid injection hole in the radial direction; and the sealing nail is used for blocking the liquid injection hole and is matched with the flow blocking part. The top cover can be matched with the flow blocking part through the sealing nail, so that the cleanliness and the surface smoothness of a welding part used for sealing the liquid injection hole are improved, the poor welding process can be avoided, the product percent of pass can be effectively improved, the working safety and reliability are improved, the cleaning procedure of the liquid injection hole can be omitted, and the production efficiency is improved.
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