Battery cover plate and battery

By designing countersunk holes and sealing pins on the battery cover, convenient secondary electrolyte injection and sealing of the battery are achieved, solving the problem of battery failure at the end of the cycle, improving battery utilization and saving production resources.

CN224400474UActive Publication Date: 2026-06-23YANCHENG BAIGU ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YANCHENG BAIGU ENERGY TECHNOLOGY CO LTD
Filing Date
2025-05-26
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing batteries fail rapidly at the end of their cycle due to lack of electrolyte. The secondary electrolyte injection process is difficult and wastes a lot of resources, leading to an increase in the number of retired batteries. It is necessary to solve the problem of convenient secondary electrolyte injection and saving production resources.

Method used

Design a battery cover plate comprising a substrate and a sealing pin. The substrate has injection holes for primary and secondary liquid injection, and the sealing pin has a countersunk hole. Secondary liquid injection is performed by puncturing through the countersunk hole. A secondary seal is provided to ensure sealing and maintain equipment and parameter consistency during battery production.

Benefits of technology

It enables convenient secondary electrolyte injection, exhaust gas removal, and negative pressure charging and discharging of batteries, reducing operational difficulty, saving production resources, improving battery utilization, and avoiding equipment adjustments and resource waste.

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    Figure CN224400474U_ABST
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Abstract

The application relates to the technical field of batteries, in particular to a battery cover plate and a battery. The battery cover plate comprises a base plate and a sealing nail. The base plate is provided with a liquid injection hole, and the sealing nail is connected in the liquid injection hole. The sealing nail is provided with a counterbore. In the application, when the battery is produced, electrolyte is injected into the battery through the liquid injection hole, and then the sealing nail is assembled in the liquid injection hole for sealing. When secondary liquid injection, exhaust gas discharge and negative pressure charging and discharging need to be performed subsequently, the sealing nail is pierced at the counterbore for operation. The counterbore can reduce the thickness of the sealing nail at the position, and is more easily pierced. The application enables the battery to be conveniently and quickly subjected to secondary liquid injection, exhaust gas discharge and negative pressure charging and discharging, so that the battery can be used multiple times, the operation difficulty is low, and the operation efficiency is high. The position for secondary liquid injection, exhaust gas discharge and negative pressure charging and discharging is the same as the operation position during production, the liquid injection equipment and the tool fixture during battery production can be reused, various equipment and various parameters need not be adjusted, and production resource waste is avoided.
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