热过载LiFePO_(4) 锂离子电池的热失控特性  

Thermal runaway characterization of thermally overloadedLiFePO_(4) Li-ion battery

作　　者：魏志宁 陈稳 卞灿灿 张朝山[1] WEI Zhining;CHEN Wen;BIAN Cancan;ZHANG Chaoshan(College of Automotive Engineering,Hangzhou Polytechnic,Hangzhou 311402,Zhejiang,China;Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,Guangdong,China;Contemporary Amperex Technology Ltd.,Ningde 352100,Fujian,China)

机构地区：[1]杭州科技职业技术学院汽车工程学院,浙江杭州311402 [2]清华大学深圳国际研究生院,广东深圳518055 [3]宁德时代新能源科技股份有限公司,福建宁德352100

出　　处：《电池》2025年第2期227-231,共5页Battery Bimonthly

基　　金：浙江省教育厅科研项目资助(Y202351723)。

摘　　要：分析磷酸铁锂(LiFePO_(4))锂离子电池在热过载条件下的热失控特性,为电池安全设计提供参考。以280 Ah储能用LiFePO_(4)锂离子电池为实验样品,安装温度传感器监测温度变化,监测氢气和硫化氢的浓度。在0.5 C充电倍率下,对单体电池和电池模组进行持续过充的热失控特性分析。单体电池在450 s时完全进入热失控状态,氢气体积分数在约300 s时开始迅速上升,峰值达到0.072%,而硫化氢在203 s时开始上升,最高为0.056%。电池模组在303 s时完全进入热失控状态,氢气体积分数在192 s时迅速增加,峰值为0.074%,硫化氢在203 s时达到0.058%。气体浓度的变化可作为热失控的早期预警指标。The thermal runaway characteristics of lithium iron phosphate(LiFePO_(4))Li-ion batteries under thermal overload conditions are analyzed to provide a reference for battery safety design.A 280 Ah LiFePO_(4) Li-ion battery for energy storage is used as experimental samples,temperature sensors are installed to monitor the temperature change,the concentration of hydrogen and hydrogen sulfide is monitored.The thermal runaway characteristics of single battery and battery module are analyzed under 0.5 C charging multiplier conditions with continuous overcharging.The single battery enters the thermal runaway state completely at 450 s.The hydrogen volume fraction starts to rise rapidly at about 300 s,with a peak value of 0.072%,while hydrogen sulfide starts to rise at 203 s,with a maximum value of 0.056%.The battery module completely enters the thermal runaway state at 303 s,the hydrogen concentration increases rapidly at 192 s with a peak value of 0.074%,while hydrogen sulfide reaches 0.058%at 203 s.The change in gas concentration can be used as an early warning indicator of thermal runaway.

关 键 词：热过载 过充 磷酸铁锂 锂离子电池 热失控 储能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]