Single cell and battery pack

By aligning the fire extinguishing element with the explosion-proof valve on the battery top cover, the problem of untimely fire extinguishing during battery thermal runaway is solved, achieving a highly efficient battery fire extinguishing effect and improving battery safety performance.

CN224502230UActive Publication Date: 2026-07-14ZHEJIANG LEAPENERGY TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG LEAPENERGY TECH CO LTD
Filing Date
2025-08-11
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing battery fire suppression systems suffer from untimely and unreliable extinguishing agent release during thermal runaway, affecting fire suppression effectiveness and resulting in insufficient safety performance.

Method used

The fire extinguishing element is installed on the top cover of the battery, which overlaps with the explosion-proof valve. The fire extinguishing element can extinguish the fire at a fixed point in time when the explosion-proof valve is opened, and the fire extinguishing medium can be used to respond quickly to the battery fire.

Benefits of technology

It achieves efficient targeted fire suppression of batteries in the early stages of thermal runaway, improves battery safety and fire suppression reliability, and reduces the need for complex components.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224502230U_ABST
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Abstract

Embodiments of the present application relate to the technical field of battery, and specifically disclose a single battery and a battery pack. The single battery comprises a shell, an electrode assembly arranged in the shell, a top cover connected to one side of the shell in a first direction, an explosion-proof valve arranged on the top cover, and a fire extinguishing element arranged on the top cover and at least partially coinciding with the projection of the explosion-proof valve on a reference plane in the first direction. According to the present application, the single battery can be extinguished at a specific point when thermal runaway occurs, which helps to improve the fire extinguishing performance of the single battery. At the same time, the single battery can effectively control the heat, smoke and fire caused by thermal runaway, so as to have the effect of front disaster prevention. In addition, the present application does not need to set complex elements, which ensures the reliability and timeliness of the fire extinguishing element, and finally improves the safety performance of the single battery.
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