计及不均匀发热与温度分布的锂离子单电池电化学-热力学耦合三维有限元模型  

Coupled Thermodynamic-Electrochemical 3D FE Model for Single Lithium-ion Battery with Consideration of Uneven Heat Generation and Temperature Distribution

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：《汽车工程》2015年第12期1382-1389,共8页Automotive Engineering

基　　金：国家973计划项目(2011CB711201)资助

摘　　要：为预测锂离子电池的内部温度场,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锂离子单电池三维分层模型耦合,组成锂离子单电池温度场有限元模型。基于模型进行1倍率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,所建立模型能较准确地预测锂离子电池内部分层结构发热分布和温度场,有助于后续的关键影响因素分析。For predicting the internal temperature field of lithium-ion battery,an one-dimensional electrochemical heat gereration model for a single lithium-ion battery is built by applying porous electrode theory,with concurrent consideration on the ohmic heat generation of cathode and anode current collectors and electrolyte,and coupled with a three-dimensional layered model based on temperature field similarity criterion to compose a temperture field FE model for lithium-ion battery.Based on the model a thermodynamics calculation in 1C discharge condition is conducted,the variation and distribution features of battery temperature is investigated,and the distribution of uneven heat generation rate in each layer is comparatively analyzed.The results of simulation show that the model built can rather acccurately predict the heat generation distribution and temperature field of internal layered structure of lithium-ion battery,inducive to subsequent key influencing factor analysis.

关 键 词：锂离子电池 电化学 相似准则 温度场 生热 

分 类 号：U463.633[机械工程—车辆工程]