Thermal runaway and jet flame features of LIBs undergone high-rate charge/discharge:An investigation

作     者：Junling Wang Junjie Yang Wei Bai Zhirong Wang Konghao Yu Yawei Lu Chaoling Han 

作者机构：Jiangsu Key Laboratory of Hazardous Chemicals Safety and ControlCollege of Safety Science and EngineeringNanjing Tech UniversityNanjing 211816JiangsuChina Department of Architecture and Civil EngineeringCity University of Hong KongTat Chee AvenueKowloonHong Kong 999077China College of Emergency ManagementNanjing Tech UniversityNanjing 211816JiangsuChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学(英文版))

年 卷 期：2025年第103卷第4期

页      面：826-837页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Key Research and Development Plan(2023YFC3009900) the National Natural Science Foundation of China(52104197,52272396,52474233) Hongkong Scholar Program(XJ2022022) Research Grants Council of the Hong Kong Special Administrative Region(City U11214221) Natural Science Foundation of the Jiangsu Higher Education Institutions(21KJB620001) the Open Fund of the State Key Laboratory of Fire Science(SKLFS)Program(HZ2022-KF04) 

主　　题：Thermal runaway Lithium-ion batteries State of charge High charge–discharge rate 

摘      要：In this work,a series of experiments are carried out to investigate the effect of charge/discharge rates(1,2,3 and 4 C)and state of charges(SOCs,namely 0%,50%,75%and 100%)on thermal runaway(TR)and fire behavior of lithium iron phosphate(LFP)*** TR process caused by overheating LFP batteries is usually divided into four stages,with high temperatures and fire ***-rate charge and discharge damage the internal morphology and structural stability of materials *** TR behavior of battery is fully aggravated,which is further manifested by the advanced opening of the safety vent,release of gas and occurrence of *** the increase of charging rate,the deteriorated TR characteristics can be discerned,such as the lower TR temperature,the shorter TR time,and the more serious TR *** changes can be assigned to the decline of battery *** addition,the battery SOC greatly impacts safety,especially the flame temperature and the severity of *** for the 100%SOC battery cycled at 4 C,there is still a high risk of thermal runaway propagation at the position 1 m far away from the *** work helps to realize the TR and fire features of battery in-depth,enlightening the safety protection of battery.