锂离子电池模组热失控传播实验研究  

Experimental study on thermal runaway propagation of lithium-ion battery modules

作　　者：陈龙[1] 张振东[1] 盛雷 朱亚宁 朱泽华 呼延吉 CHEN Long;ZHANG Zhendong;SHENG Lei;ZHU Yaning;ZHU Zehua;HU Yanji(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Yanqing Electronic Technology(Ningbo)Co.,Ltd.,Ningbo 315321,China)

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]延擎电子科技(宁波)有限公司,宁波315321

出　　处：《上海理工大学学报》2024年第5期525-532,共8页Journal of University of Shanghai For Science and Technology

基　　金：国家自然科学青年基金资助项目(5220061363)。

摘　　要：为了提升电池热安全和汽车可靠性,开展电池模组热失控传播研究。针对圆柱形21700锂离子电池的热失控传播特性,通过实验研究了电池荷电状态、单体间距等因素对21700锂离子电池模组多维度热失控传播行为的影响。发现电池热失控轴向传播要快于径向。在电池满电状态,间距2.0 mm时,热失控轴向传播要比径向快97 s,并且随着电池电量的降低和间距的增大,热失控传播速度变慢。在电池间距为2.0 mm时,30%和50%荷电状态分别是轴向和径向电池的安全荷电状态。在电池满电状态时,6.0 mm和4.0 mm分别是轴向和径向电池的安全距离。研究结果可为电池的存储、运输以及电动汽车的电池模组设计等提供借鉴。In order to improve battery thermal safety and vehicle reliability,the thermal runaway propagation of battery modules was carried out.Aiming at the thermal runaway propagation characteristics of cylindrical 21700 lithium-ion batteries,the effects of charging state,cell distance and other factors on the multi-dimensional thermal runaway propagation behavior of 21700 lithium-ion battery modules were investigated experimentally.It is found that the thermal runaway propagation of the battery is faster in the axial direction than it in the radial direction.When the battery is fully charged and the spacing is 2.0 mm,the thermal runaway propagation is 97 s faster in the axial direction than in the radial direction,and with the decrease of the battery power and the increase of the spacing,the thermal runaway propagation speed becomes slower.When the battery spacing is 2.0 mm,the 30%and 50%charging states are safe charging states for axial and radial batteries,respectively.When the battery is fully charged,6.0 mm and 4.0 mm are the safe distances for axial and radial batteries,respectively.The research results can provide reference for battery storage,transportation and battery module design of electric vehicles.

关 键 词：21700锂离子电池模组 热失控传播 多维度 荷电状态 电池间距 

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]