基于雾冷系统的锂离子电池热失控抑制研究  

Study on thermal runaway suppression of li-ion battery with mist cooling system

作　　者：张一和 季经纬[2] 刘通[2,3] 林亿超 ZHANG Yihe;JI Jingwei;LIU Tong;LIN Yichao(Shenzhen Expressway Group Co.,Ltd.,Shenzhen Guangdong 518000,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei Anhui 230026,China;China Academy of Safety Science and Technology,Beijing 100012,China)

机构地区：[1]深圳高速公路集团股份有限公司,广东深圳518000 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026 [4]中国安全生产科学研究院,北京100012

出　　处：《中国安全生产科学技术》2023年第12期109-114,共6页Journal of Safety Science and Technology

基　　金：火灾科学国家重点实验室开放课题项目(HZ2023-KF02);“双一流”建设提升自主创新能力课题项目(2022ZZCX05K02)。

摘　　要：为了深入研究雾冷技术对锂离子电池热失控灾害的冷却抑制效果,通过实验方法研究不同流速及浓度条件下雾冷技术对热失控的抑制效果。研究结果表明:与空气冷却相比,雾冷系统的冷却能力有大幅度提升,其可以在热失控触发前有效阻断热失控进展;热失控条件下,需通入过量雾滴,进而增强电池高温局部蒸发吸热的能力,以达到预期冷却效果;雾滴局部增发吸热是主导热失控抑制的关键因素,其与雾滴自身浓度与气流速度密切相关。基于冷却过程中的关键温度节点,本文将热失控灾害防治划分成不同级别,可用于指导实际工程应用。In order to further study the cooling suppression effect of mist cooling technology on thermal runaway hazard of li-ion battery,the suppression effect of mist cooling technology on thermal runaway under different flow velocities and concentrations was studied by experimental method.The results show that compared with air cooling,the cooling capacity of mist cooling system is greatly improved,which can effectively block the progress of thermal runaway before triggering thermal runaway.Under the condition of thermal runaway,the excessive mist droplets should be introduced to enhance the ability of local evaporation and heat absorption of the battery at high temperature,so as to achieve the expected cooling effect.The local evaporation and heat absorption of mist droplets is the key factor dominating the suppression of thermal runaway,which is closely related to the concentration of mist droplets and the airflow velocity.Based on the key temperature nodes in the cooling process,the hazard prevention and control of thermal runaway is divided into different levels,which can be used to guide practical engineering application.

关 键 词：雾冷 热失控 锂离子电池 灾害防治 

分 类 号：TM912[电气工程—电力电子与电力传动] X932[环境科学与工程—安全科学]