磷酸铁锂与三元锂离子电池加热下的热失控行为  

Thermal runaway behavior of LiFePO_(4) and ternary Li-ion batteries under heating

作　　者：顾正建 陶倩艺 杨智皋 黄惠 张耀 GU Zhengjian;TAO Qianyi;YANG Zhigao;HUANG Hui;ZHANG Yao(Wuxi Institute of Inspection,Testing and Certification,Wuxi,Jiangsu 214028,China;School of Materials Science and Engineering,Southeast University,Nanjing,Jiangsu 211102,China)

机构地区：[1]无锡市检验检测认证研究院,江苏无锡214028 [2]东南大学材料科学与工程学院,江苏南京211102

出　　处：《电池》2024年第4期513-518,共6页Battery Bimonthly

基　　金：国家市场监督管理总局科技计划项目(2022MK037)。

摘　　要：针对锂离子电池存在的起火和爆炸风险,以储能用3.2 V 100 Ah磷酸铁锂锂离子电池和3.6 V 90 Ah三元LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)锂离子电池为对象,采用外部加热的滥用方式,研究不同正极体系锂离子电池的热失控特性。取样磷酸铁锂锂离子电池在外部加热条件下不会燃烧,仅释放大量白色烟雾,电池热失控最高温度为534.2℃,总放热量为0.162 MJ,最高热释放速率为1.81 kW;取样三元锂离子电池在外部加热条件下发生燃烧和喷射,电池热失控最高温度为1052.4℃,总放热量为3.147 MJ,最高热释放速率为134.85 kW;磷酸铁锂与三元锂离子电池热失控后产生的气体成分几乎一致,均为H_(2)、CO_(2)、CO和碳氢化合物;磷酸铁锂与三元锂离子电池热失控后,电压均存在二次下降的现象。In response to the risk of ignition and explosion of Li-ion batteries,the thermal runaway characteristics of Li-ion batteries with different cathode systems are studied using external heating abuse methods,taking 3.2 V 100 Ah LiFePO_(4)Li-ion battery and 3.6 V 90 Ah ternary LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)Li-ion battery for energy storage as objects.The sampled LiFePO_(4)Li-ion battery does not burn under external heating condition,only releases a large amount of white smoke;the maximum temperature of the battery thermal runaway is 534.2℃,the total heat release is 0.162 MJ,and the maximum heat release rate is 1.81 kW.The sampled ternary Li-ion battery undergoes combustion and injection under external heating conditions;the maximum temperature of thermal runaway of the battery is 1052.4℃,the total heat release is 3.147 MJ,and the maximum heat release rate is 134.85 kW.The gas composition generated after thermal runaway of LiFePO_(4)and ternary Li-ion batteries is almost identical.They are H_(2),CO_(2),CO and hydrocarbon.Both LiFePO_(4)and ternary Li-ion batteries exhibit a secondary decrease in voltage after thermal runaway.

关 键 词：磷酸铁锂锂离子电池 三元锂离子电池 储能 热失控参数 早期预警 

分 类 号：TM912.9[电气工程—电力电子与电力传动]