Top cover, top cover assembly, battery, and energy storage apparatus
By incorporating a reinforced structure on the top cover, the problem of malfunctioning explosion-proof valves during thermal runaway of large-capacity batteries was resolved, thus improving battery safety.
WO2026113588A1PCT designated stage Publication Date: 2026-06-04XIAMEN HITHIUM ENERGY STORAGE TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- XIAMEN HITHIUM ENERGY STORAGE TECHNOLOGY CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
When a large-capacity battery experiences thermal runaway, the explosion-proof valve is prone to abnormal opening, leading to safety hazards.
Method used
A reinforcing structure is installed on the top cover to increase local strength, disperse pressure, limit deformation, and prevent the explosion-proof valve from deforming. By setting a reinforcing structure between the injection hole and the explosion-proof hole, deformation is prevented from extending to the explosion-proof valve.
Benefits of technology
This improves the reliability of the explosion-proof valve, avoids abnormal valve opening during thermal runaway, and enhances the safety performance of the battery.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025122172_04062026_PF_FP_ABST
Abstract
The present application provides a top cover, a top cover assembly, a battery, and an energy storage apparatus. The top cover comprises a main body, an explosion-proof hole, a liquid injection hole, and a first reinforcing structure. The main body comprises a top cover body and a first connection portion, and the first connection portion protrudes from the top cover body. The explosion-proof hole is provided on the first connection portion and penetrates through the first connection portion in the thickness direction of the first connection portion. The explosion-proof hole is configured to be connected to an explosion-proof valve. The liquid injection hole is provided on the first connection portion and penetrates through the first connection portion in the thickness direction of the first connection portion. The liquid injection hole is spaced apart from the explosion-proof hole. The first reinforcing structure is recessed in the first connection portion. The direction of recession of the first reinforcing structure relative to the first connection portion is opposite to the direction of protrusion of the first connection portion relative to the top cover body. The first reinforcing structure is located between the explosion-proof hole and the liquid injection hole and is spaced apart from both the explosion-proof hole and the liquid injection hole.
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