三元锂离子电池热扩散行为研究  

Research on thermal diffusion behavior of ternary lithium-ion batteries

作　　者：冯爽 许立坤 胡帛涛 邝男男 FENG Shuang;XU Likun;HU Botao;KUANG Nannan(CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中汽研(天津)汽车工程研究院有限公司,天津300300

出　　处：《电源技术》2025年第2期355-360,共6页Chinese Journal of Power Sources

摘　　要：动力电池热失控一直是行业难题,由单电芯热失控所引发的电池包内部的热扩散行为往往会造成恶劣的安全事故。基于此,针对电芯的热失控行为,通过反应动力学测试和物性参数测试,建立一套电芯热失控数学模型。以外部加热作为热失控触发条件,测试了模组内电芯间的热扩散行为。结果表明在无明显冷却措施介入时,热扩散速度逐渐增加。此外,结合仿真手段,对模组内各温度点数据进行了对标,并预测了该模组在一个小型电池包内的热扩散表现。The thermal runaway of power batteries has always been a problem in the electric vehicle industry.The thermal diffusion behavior inside the battery pack,caused by the thermal runaway of a single cell,leads to more severe safety accidents.In order to address the issue,a mathematical model for the thermal runaway was developed through the reaction kinetic tests and physical property parameter tests.The thermal diffusion of the module-level battery was tested by using the external heating as the triggering condition of the thermal runaway.The results show that the thermal diffusion velocity increases gradually when there is no obvious cooling intervention.By integrating the simulation methods,the temperature data within the module were standardized,and the thermal diffusion behavior of the module in a small battery pack was predicted.

关 键 词：锂离子电池 热失控仿真 热扩散 电池安全 

分 类 号：TM912.9[电气工程—电力电子与电力传动]