摘 要：随着锂离子电池使用时间的延长，电池单体的健康状态出现不同程度的退化，导致单体性能不一致，甚至可能引发内部短路导致热失控。本文基于对事故过程和后台数据的分析，研究电池健康状态与热失控之间的关系，提出实现锂离子电池热失控预警的有效方法。
关键词：电动汽车；动力电池；健康状态；火灾安全
中图分类号：U461.91；TM912 文献标志码：A DOI：10.15917/j.cnki.1006-3331.2025.02.002
Research on Health Status and Fire Safety of Lithium-ion Batteries
LIN Pengyong
Abstract: With lithium-ion batteries'usage time extending,the health status of individual cells undergoes varying degrees of degeneracy.This results in performance inconsistency among the cells,leading to internal short circuits and thermal runaway.This paper analyzes based on the accident process and backend data,investigates the relationship between batteries'health status and thermal runaways,and proposes effective methods for early warning of lithium-ion batteries'thermal runaways.
Key words: electric vehicles; power battery; health status; fire safety
