Lithium battery overcharge monitoring and early warning device

By installing temperature rise and deformation detection units on the lithium battery, combined with pressure sensing chips and short-circuit circuits, the problem of the lack of early warning in existing lithium battery charging equipment is solved, realizing multiple monitoring and automatic protection against overcharging of lithium batteries, and ensuring the safety of lithium batteries.

CN120879875BActive Publication Date: 2026-06-19台州市产品质量安全检测研究院 国家电机及机械零部件产品质量检验检测中心 国家智能马桶产品质量检验检测中心(浙江)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
台州市产品质量安全检测研究院 国家电机及机械零部件产品质量检验检测中心 国家智能马桶产品质量检验检测中心(浙江)
Filing Date
2025-09-05
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing lithium battery charging equipment relies solely on voltage detection and lacks intuitive and effective early warning methods, making it difficult for users to detect the danger of overcharging in a timely manner, thus posing a safety hazard.

⚗Method used

Design a lithium battery overcharge monitoring and early warning device, which combines temperature rise and deformation detection units, uses a pressure sensing chip to determine the overcharge state of the lithium battery and issues alarms at different levels, and includes a short-circuit circuit to automatically stop charging.

🎯Benefits of technology

It implements a multi-early warning mechanism for lithium battery overcharging, which can more intuitively judge the charging status, prevent safety accidents caused by lithium battery overcharging in a timely manner, and ensure the safety of lithium battery use.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a lithium battery overcharge monitoring and early warning device. Several temperature rise detection units and deformation detection units are installed on a mounting box. The mounting box has an open-side structure, and the open end is covered with a thermally conductive film that deforms with the lithium battery casing. The deformation detection unit includes a mounting sleeve, a slide rod, a patch, a first spring, and a first pressure sensing chip. The temperature rise detection unit includes a mounting base, a second spring, and a piston plate. The first and second pressure sensing chips are respectively installed in the closed ends of the mounting sleeve and mounting base. One end of the first and second springs respectively abuts against the first and second pressure sensing chips. When the detection value of each pressure sensing chip rises to a corresponding set threshold, the alarm module issues a corresponding type of alarm. This invention can monitor lithium battery overcharge from multiple dimensions, better determine lithium battery overcharge, and automatically stop lithium battery charging.
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