摘要
为明确锂电池的火灾危险性,对不同数量磷酸铁锂电池组火灾时的电池表面温度、火焰形态、火焰温度、热释放速率、质量损失损率以及可燃气体体积分数等燃烧特性参数进行试验研究。结果表明:磷酸铁锂电池组的热失控温度约200~300℃,呈现集中燃烧,气相火焰温度可达1100℃;磷酸铁锂电池组电池数量增加,喷射火焰出现的次数增多,热释放速率峰值相应出现;电池组最大质量损失速率随电池数量的增加呈幂函数变化,放热量与电池数量的1.28次方成正比。
In order to clarify the fire hazard of lithium batteries,the combustion characteristics parameters of different quantities of lithium-ion batteries,such as cell surface temperature,flame shape,flame temperature,heat release rate,mass loss rate and flammable gas volume fraction,were studied by experiment.The results show that the thermal runaway temperature of lithium iron phosphate battery pack is around 200-300℃,showing concentrated combustion,and the gas flame temperature can reach 1100℃,that the fire environment of lithium iron phosphate battery pack has multiple spray flames with the increase of the number of batteries,and the peak of heat release rate is closely related to the spray flame,that the maximum mass loss rate of lithium iron phosphate battery pack changes in a power function with the increase of the number of batteries,and that the amount of heat released is proportional to the 1.28 power of the number of batteries.
作者
邓康
张英
徐伯乐
马出原
牛奕
DENG Kang;ZHANG Ying;XU Bole;MA Chuyuan;NIU Yi(Department of Safety Science and Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China;China Ship Research and Design Center,Wuhan Hubei 430070,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2019年第11期83-88,共6页
China Safety Science Journal
基金
国家重点研发计划项目(2017YFC0804705)
国家自然科学基金资助(51706164)。
关键词
锂电池
热失控温度
喷射火焰
最大质量损失速率
放热量
lithium battery
thermal runaway temperature
jet flame
maximum mass loss rate
heat release
