A lithium battery bulge protection alarm device

By designing a lithium battery bulging protection alarm device, and adopting a parallel breakpoint and contact structure and a protective baffle, the problem of lithium battery bulging causing combustion or explosion has been solved, achieving timely alarm and improved reliability.

CN224437028UActive Publication Date: 2026-06-30DONGGUAN CITY JINSAIER BATTERY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN CITY JINSAIER BATTERY TECH CO LTD
Filing Date
2025-06-11
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Lithium batteries are prone to bulging when overcharged, over-discharged, or exposed to high temperatures, which may lead to combustion or explosion. Existing technologies make it difficult to detect and protect against this in a timely manner.

Method used

Design a lithium battery bulging protection alarm device, which uses two sets of parallel breakpoints and contacts. The mechanical contact structure detects the bulging state of the battery in real time, triggers a buzzer alarm, and prevents foreign object interference through protective baffles and a labyrinth structure.

Benefits of technology

It enables timely alarm when the battery bulges, preventing combustion or explosion, improving device reliability, reducing false alarms, and preventing external foreign objects from entering and interfering with the circuit.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a lithium battery bulging protection alarm device, relating to the field of lithium battery technology. It includes a lithium battery body; a housing fitted over the lithium battery body; an alarm mechanism comprising a power supply, a buzzer, and a wire, wherein the two poles of the power supply are connected via the wire, the buzzer is connected in series with the wire, and the wire has a break point; a contact mounted on the lithium battery body, used to close the break point when the lithium battery body bulges; and a protective baffle located outside the break point of the wire, connected to the inner wall of the housing. This utility model solves the problem of further deterioration leading to combustion or explosion of the battery after bulging by setting two sets of parallel break points and contacts to detect the battery bulging state in real time.
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