锂离子电池三维多层多物理场模型  

Lithium-ion battery 3-dimensional multi-layer multi-field model

作　　者：李腾[1] 林成涛[1] 陈全世[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2012年第7期995-1000,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(51006056);清华大学自主科研计划资助项目(2011THZ01004)

摘　　要：为了对大容量锂离子电池结构设计提供指导,使用Bernardi生热速率理论和有限元方法,构建了锂离子电池三维多层多物理场模型,通过电池恒流放电和红外热成像实验对模型进行验证。模型仿真得到的工作电压和温度数据和实验得到的结果吻合。研究发现,极耳对电池内部电流密度和温度场分布不一致有较大影响。在电池的结构设计方面,建议加宽加厚极耳,并在条件允许的情况下建议将极耳分置于电池两侧。A three dimensional, multi layer multi field lithium-ion battery model was built to guide the structural design of lithium ion batteries. Bernardi heat generating theory and the finite element method were used with a constant discharge experiment and an infrared thermal imaging experiment used to verify the model, The working voltage data and the lemperalure data in the simulation coincide with those in the experiment. The temperature field and the electric field distributions in the battery are accurately described by the model. The results show that the plate lugs influence the current density and temperature distributions; thus, the lugs should be widened and thickened. If possible, the plate lugs should be put into different sides of the cells,

关 键 词：锂离子电池 多物理场 模型 

分 类 号：TM912[电气工程—电力电子与电力传动]