磷酸铁锂电池热失控产气可燃极限研究  

Study on flammability limit of thermal runaway gas of LiFePO_(4) battery

作　　者：马彪 李海强 白广利 刘杰[2] 刘仕强 MA Biao;LI Haiqiang;BAI Guangli;LIU Jie;LIU Shiqiang(CATARC New Energy Vehicle Test Center(Tianjin)Co.,Ltd.,Tianjin 300300,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中汽研新能源汽车检验中心(天津)有限公司,天津300300 [2]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《电源技术》2024年第7期1267-1272,共6页Chinese Journal of Power Sources

基　　金：国家重点研发计划(2021YFB2402001)。

摘　　要：大规模储能技术被认为是支撑可再生能源普及的战略性技术,得到各国政府和企业界的高度关注。磷酸铁锂电池以其高安全性和优良电化学性能成为电化学储能单元的主要选择。使用密闭压力容器对不同容量及不同SOC磷酸铁锂电池进行热失控测试,记录特征点温度变化,收集测试后热失控释放的气体,用气相色谱仪分析混合气的组分比例。利用仿真及L-C公式,研究其可燃极限特征。结果表明,电池容量对产气组分比例以及可燃极限影响较小,SOC对其影响较大,SOC较低的电池热失控产气组分中具有较多的CO_(2)以及较高的可燃下限值。Large scale energy storage is considered as a strategic technology to support the popularization of renewable energy,and has received high attention from governments and businesses of all countries.Lithium iron phosphate battery has become the main choice of energy storage units in electrochemical energy storage due to its high safety and excellent electrochemical performance.The closed pressure vessel was used to test the heating thermal runaway of LiFePO_(4) battery with different capacities and different SOCs,the temperature change at the characteristic point was recorded,the gas released from the thermal runaway after the test was collected,and the gas chromatograph was used to analyze the composition ratio of the mixed gas.Finally,the flammability limit characteristics were studied using simulation and L-C formula.The results show that the battery capacity has a small impact on the proportion of gas production components and the flammability limit,while SOC has a greater impact.Batteries with lower SOC have more CO_(2) in the thermal runaway vent gas,and their lean flammability limit is higher.

关 键 词：储能电池 磷酸铁锂电池 热失控产气 可燃极限 

分 类 号：TM912[电气工程—电力电子与电力传动]