摘要
为实现对锂离子电池热失控气体成分及危险性进行快速分析,提出了一种基于激光拉曼光谱气体检测技术结合经验公式的分析方法。利用自主设计搭建的锂离子电池气体检测平台,使用不同荷电状态(75%、100%)和不同正极材料(LCO、NCM)的18650型锂离子电池对热失控气体成分及爆炸危险性分析方法进行验证。结果表明:相同荷电状态(SOC)下,NCM电池比LCO电池在热失控后释放的可燃气体量更多,100%荷电状态的NCM电池在热失控后容器内部CO占比高达22.02%,随着荷电状态的增加,锂离子电池热失控生成的可燃气体量增加。不同实验工况下,锂离子电池热失控后的气体仍具有较高的爆炸风险。研究结果证明了激光拉曼光谱气体检测技术检测锂离子电池热失控气体的可行性,为热失控气体成分和爆炸危险性的快速检测及分析提供了理论依据和技术支撑。
In order to quickly analyze the composition and risk of thermal runaway gas in lithium ion batteries,an analysis method based on laser Raman spectroscopy and the empirical formula is proposed.Using the independently designed gas detection platform of the lithium ion battery,the composition and explosion risk of runaway gas released by a 18650 lithium ion battery with different charge states(75%,100%)and different cathode materials(LCO,NCM)were studied.According to the experimental findings,the NCM battery releases more flammable gas following thermal runaway than the LCO battery under the same state of charge(SOC).After thermal runaway,the proportion of CO in the container of NCM battery with 100%SOC is as high as 22.02%.With the increase of SOC,the amount of combustible gas generated by the thermal runaway of lithium ion batteries increases.Under different experimental conditions,the gas after the thermal runaway of the lithium-ion battery still had a high explosion risk.The findings demonstrate the viability of using laser Raman spectroscopy to identify lithium-ion battery thermal runaway gas,and they offer a theoretical foundation and technical backing for the quick identification and evaluation of the composition of thermal runaway gas and explosion danger.
作者
张青松
刘添添
郝朝龙
曲奕润
张伟
陈达
ZHANG Qingsong;LIU Tiantian;HAO Chaolong;QU Yirun;ZHANG Wei;CHEN Da(Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response,Civil Aviation University of China,Tianjin 300300,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2023年第9期2227-2233,共7页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金民航联合基金重点支持项目(U2033204)
中央高校基本科研业务费项目中国民航大学专项(3122023022)。
关键词
锂离子电池
热失控
拉曼光谱
气体检测
爆炸极限
lithium ion battery
thermal runaway
Raman spectroscopy
gas detection
explosion limit
