摘要
为探究多块串联三元软包锂离子电池模组热失控及热扩散的行为特征,基于能量守恒定律和传热机理,应用Comsol有限元软件建立电化学-热耦合模型并进行仿真。仿真结果表明,当电池单体发生热失控时,电池电压变化早于温度变化40 s,为采取阻燃控制措施预留了充分的时间;在第160 s时,边缘位置比中间位置电池触发热失控的温度高56℃;分析热对流对散热模型的影响,发现空气对流速度大于0.5 m/s时,电池最高温度小于200℃,不会触发热失控。
In order to investigate the behavior of thermal runaway and thermal diffusion of multiple series ternary soft packet Lithium-ion battery modules,an electrochemical-thermal coupling model is established by Comsol finite element software based on the law of energy conservation and heat transfer mechanism.The results show that when thermal runaway occurs,the battery voltage changes 40 s earlier than the temperature changes,so that adequate time is allowed for flame retardant control measures.At 160 s,the temperature at the edge position is 56℃higher than that at the middle position when the battery triggers thermal runaway.The influence of heat convection on the heat dissipation model is analyzed.It is found that when the air convection velocity is greater than 0.5 m/s,the maximum temperature of the battery is less than 200℃,and the heat runaway is not triggered.
作者
郭艾雯
邢志祥
施雅琴
祁龙泰
谢瑞卿
GUO Aiwen;XING Zhixiang;SHI Yaqin;QI Longtai;XIE Ruiqing(School of Safety Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第10期111-116,共6页
Research and Exploration In Laboratory
基金
国家重点研发计划项目(2022YFB4002803,2022YFB4002804)
江苏省研究生科研与实践创新计划项目(KYCX22_1381)。
关键词
电化学-热耦合
热失控
电池模组
散热
electrochemical thermal coupling
thermal runaway
battery module
heat dissipation