锰酸锂电池热失控特性研究  

Research on thermal runaway characteristics of lithium manganate battery

作　　者：董海斌 羡学磊 马建琴 伊程毅 DONG Hai-bin;XIAN Xue-lei;MA Jian-qin;YI Cheng-yi(Tianjin Fire Science and Technology Research Institute of MEM,Tianjin 300382,China)

机构地区：[1]应急管理部天津消防研究所,天津300382

出　　处：《消防科学与技术》2022年第1期21-25,共5页Fire Science and Technology

基　　金：应急管理部天津消防研究所基科费项目(2020SJ09)。

摘　　要：以方形锰酸锂电池为研究对象,利用ARC绝热量热仪研究电池热失控温度,通过跟踪搜索获得锰酸锂电池热失控温度为211.16℃。通过加热和过充不同触发方式诱发电池热失控。在加热触发热失控时,电池热失控后仅会多次喷射白色烟雾,无明火,电池表面最高温度411.5℃;在过充触发热失控时,电池本体鼓胀程度明显,爆喷后立即喷射剧烈火焰,持续一定时间后达到稳定燃烧,最后明火燃烧减弱直至熄灭,电池表面最高温度155.7℃。实验过程中采集电池正负极极耳及表面的温度,电池极耳及表面的温度大于80℃,温升速率大于1℃/s且持续3 s以上时,证明电池已发生了热失控,可以以上述参量作为电池热失控的判定依据。Square lithium manganate battery was taken as the research object,and the thermal runaway temperature of battery was studied by ARC adiabatic calorimeter.The thermal runaway temperature of lithium manganate battery was obtained as 211.16℃through tracking search.In terms of thermal runaway characteristics induced by different triggering modes of heating and overcharging,when the battery is triggered by heating,only white smoke will be sprayed for many times after thermal runaway,with no flame,and the highest surface temperature of the battery is 411.5℃.When the overcharge triggers thermal runaway,the battery body bulges significantly.Violent flame is sprayed immediately after explosion,and stable combustion is achieved after a certain period of time.Finally,open flame combustion weakens and dies out,and the maximum surface temperature of the battery is 155.7℃.During the test,the temperature of the positive and negative electrode ears and the surface of the battery were collected.When the temperature of the electrode ears and the surface of the battery was greater than 80℃and the temperature rise rate was greater than 1℃/s and lasted for more than 3 s,it was proved that the battery had thermal runaway,and the above parameters could be used as the basis for determining the thermal runaway of the battery.

关 键 词：锰酸锂电池 触发 热失控 温度 温升速率 

分 类 号：X928.7[环境科学与工程—安全科学] TM912.9[电气工程—电力电子与电力传动]