Early warning system for thermal runaway of lithium ion battery in ultra-early stage

Through the principal component analysis method and fire status evaluation model, ultra-early thermal runaway warning is performed on container lithium-ion batteries, solving the problem that traditional early warning methods are difficult to deal with complex data and closed environments, and realizing effective early warnings and safety measures for thermal runaway in container lithium-ion batteries.

CN119695315APending Publication Date: 2025-03-25HUBEI ELECTRIC POWER EQUIP
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Patent Information

Application Number
CN202411139204.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-20
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The containerized lithium-ion battery energy storage system may cause thermal runaway in the case of overcharge, overdischarge, short circuit, mechanical collision, etc., resulting in high temperatures, smoke and fire, posing safety hazards, and traditional early warning methods are difficult to effectively handle its complex data and gas diffusion characteristics in closed environments.

Method used

The initial data is dimensionally reduced by using principal component analysis method, and the fire status evaluation model is used to predict the current fire status, and the early warning signals of different levels are generated based on the thermal runaway state to achieve an ultra-early early warning of thermal runaway in container lithium-ion batteries.

Benefits of technology

It effectively reduces the occurrence of false alarms and omissions, improves the perception ability and diagnostic accuracy of thermal runaway for container-type lithium-ion batteries, and takes timely safety measures to reduce the probability and degree of loss of accidents.

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Abstract

The invention relates to the field of safety monitoring of power equipment, and provides an ultra-early-stage lithium ion battery thermal runaway early warning system which is applied to the interior of a battery prefabricated cabin. The data acquisition module is used for acquiring initial temperature rise change curve data, initial combustible gas concentration data, initial electrolyte volatile liquid data and initial particle number data in the charging process of the lithium ion battery; the data processing module is used for carrying out sorting and dimension reduction on the initial temperature rise change curve data, the initial combustible gas concentration data, the initial electrolyte volatile liquid data and the initial particle number data through a principal component analysis method to obtain lithium ion battery characteristic data; the fire-fighting prediction module is used for inputting the lithium ion battery characteristic data into the fire-fighting state evaluation model to obtain the current fire-fighting state of the battery prefabricated cabin; the early warning generation module is used for judging the thermal runaway state of the corresponding lithium ion battery based on the current fire-fighting state and generating early warning signals of different levels based on the thermal runaway state; and the early warning response module is used for taking corresponding safety measures according to the early warning signals of different levels. According to the invention, ultra-early warning of thermal runaway of the container type lithium ion battery is realized, corresponding safety measures can be taken in time, and occurrence of false alarms and missing alarms is effectively reduced.
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