三维锂离子单电池电化学-热耦合模型  

Coupled thermal-electrochemical model of 3D lithium-ion battery

作　　者：张立军[1,2] 李文博[1,2] 程洪正[1,2] 

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学新能源汽车工程中心,上海201804

出　　处：《电源技术》2016年第7期1362-1366,1490,共6页Chinese Journal of Power Sources

基　　金：国家"973"计划项目(2011CB711201)

摘　　要：预测锂离子电池的内部温度场对于热管理系统开发具有重要意义。应用多孔电极理论,建立了锂离子电池的一维电化学生热模型,同时考虑正负极集流板和电解液的欧姆热,与基于温度场相似准则建立的跨尺度锂离子单电池三维分层模型耦合,建立了基于有限单元的锂离子单电池温度场模型。基于模型进行1恒流放电工况下的热力学计算,系统考察了电池温度变化与分布特征,并对比分析了各层不均匀发热率分布情况。仿真结果表明,所建立模型能够进行锂离子电池内部分层结构发热分布和温度场预测,有助于后续的关键影响因素分析。Predicting the internal temperature field of the lithium-ion battery is of great significance for the development of battery thermal management system.A single lithium-ion battery one-dimensional thermal- electrochemical model based on finite element was built based on the porous electrode theory, and a three-dimensional cross-scale layered thermal model was built based on the temperature field similarity criterion considering both ohm heat generation of the cathode and anode current collectors and electrolyte. The temperature change and distribution of the li-ion battery and the heat generation rate of each layer were analyzed on the condition of 1 C discharge. Simulation results show that the established model can predict the heat generation distribution of each layer and the temperature field in the li-ion battery, contributing to the analysis of various key influence factors.

关 键 词：锂离子电池 一维电化学 相似原理 温度场 生热 

分 类 号：TM912[电气工程—电力电子与电力传动]