Dual pressure relief cover plate assembly and battery

CN224554622UActive Publication Date: 2026-07-24HUIZHOU SIYANG PRECISION COMPONENTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUIZHOU SIYANG PRECISION COMPONENTS CO LTD
Filing Date
2025-07-23
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional lithium battery explosion-proof valves cannot rupture and release pressure in advance under high temperature conditions, which may cause the lithium battery to explode or catch fire.

Method used

The system employs a dual pressure relief cover assembly, including an end cap, a positive electrode post, and an insulating plate. The end cap is equipped with a hot-melt sealant layer, and the positive electrode post is sealed to the end cap through the hot-melt sealant layer. The insulating plate is equipped with an explosion-proof valve, and the diameter of the mounting hole is larger than the diameter of the electrode post to ensure pressure relief through the gap before high temperature. The explosion-proof valve ruptures and relieves pressure under high pressure.

Benefits of technology

By releasing pressure through gaps before the internal high temperature of the lithium battery, high pressure is prevented from forming, further improving battery safety and avoiding explosions or fires.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224554622U_ABST
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Abstract

The utility model relates to battery technical field discloses a double relief cover plate subassembly and battery. The double relief cover plate subassembly includes end cover, positive pole and isolating sheet, is equipped with mounting hole on end cover, and end cover is equipped with hot melt sealant layer around mounting hole, and the positive pole includes pole body and annular flange portion of pole body integrated forming, and the bottom surface of annular flane portion and the top surface of hot melt sealant layer seal and fit, and the isolating sheet is connected in the lower end of pole body, and the coaxial first through -hole and second through -hole are equipped on end cover and isolating sheet, and the explosion -proof valve is installed on second through -hole. Through the explosion -proof valve and the hot melt sealant layer set up between annular flange portion and end cover make the double relief cover plate subassembly form two relief passages, and the safety of battery is further strengthened.
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