An electrochromic material capable of monitoring battery health, preparation method and application thereof

By preparing electrochromic materials and utilizing the color changes caused by light or electricity, the problem of rapid, efficient and continuous leakage detection of lithium-ion soft-pack batteries is solved, and the efficiency of automated production is improved.

CN116987496BActive Publication Date: 2025-09-30ZHEJIANG TONY ELECTRONICS CO LTD
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Patent Information

Application Number
CN202310962369.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-02
Publication Date
2025-09-30
Estimated Expiration
2043-08-02

AI Technical Summary

Technical Problem

Existing technologies are unable to quickly and efficiently monitor and detect leakage in lithium-ion soft-pack batteries. Automated testing is risky, time-consuming, and labor-intensive, and there is a lack of continuous monitoring materials.

Method used

Electrochromic materials are prepared using ethoxylated bisphenol A dimethacrylate, antioxidants, photoinitiators and electrochromic polymers (such as metal complexes of pyridine derivatives). Continuous monitoring of battery leakage is achieved through color changes under light or power supply, and a protective film is prepared for soft-pack lithium batteries.

Benefits of technology

It realizes continuous, rapid and efficient detection of lithium-ion soft-pack battery leakage, reduces the risk of automated production and improves production efficiency.

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Abstract

The present invention provides an electrochromic material, preparation method, and application for monitoring battery health. Taking the total mass fraction as 100%, the electrochromic material comprises ethoxylated bisphenol A dimethacrylate, tripropylene glycol diacrylate, isobornyl methacrylate, 4-diphenylmethanol methacrylate, 4-acryloylmorpholine, an antioxidant, a photoinitiator, and an electrochromic polymer, wherein the electrochromic polymer is a metal complex of a pyridine derivative. The electrochromic polymer provided by the present invention can rapidly react under the action of light or electricity, causing the color of the material to change from transparent to colored. This allows for continuous monitoring of battery leakage, enabling timely detection of battery leakage problems through electrochromism and prompt replacement of problematic battery modules, thereby facilitating maintenance and servicing of battery equipment.
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