动力锂电池温度场仿真分析  

Simulation Analysis on Temperature Field of Power Lithium Battery

作　　者：郭凯丽 王晓佳 王若琦 林文梁 GUO Kai-li;WANG Xiao-jia;WANG Ruo-qi;LIN Wen-liang(College of Mechanical and Transportation Engineering,Taiyuan University of Technology,Shanxi Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024

出　　处：《机械设计与制造》2022年第5期196-200,204,共6页Machinery Design & Manufacture

基　　金：山西省科技厅重大专项中重卡燃料电池项目(20181102009)。

摘　　要：动力锂电池是纯电动汽车的核心部件,性能受温度影响较大,较高的温度会减少电池的循环使用寿命,甚至造成燃爆事故。针对锂电池在工作过程中的发热问题,根据电化学反应理论与电池生热理论,建立了基于NTGK模型的电化学-热耦合模型并进行仿真分析,得到了不同放电倍率下电池的最大温升和最大温差的变化情况。搭建试验平台对仿真结果进行试验验证,结果表明,试验温度变化曲线与仿真分析结果基本吻合,验证了模型的可行性,且随着放电倍率增大,电池的温升越快,最高温度和最大温差越大。Power lithium-ion battery is a key component of pure electric vehicles. Its performance is greatly affected by temperature,higher temperature will reduce the battery cycle life,or even cause the fire and explosion accident. According to the theory of electrochemical reaction and cell heat generation,the electrochemical-thermal coupling model based on NTGK model was established to solve the heating problem of lithium battery in the working process. The maximum temperature rise and maximum temperature difference of the battery under different discharge rates were obtained through simulation analysis. The test platform was built to test and verify the simulation results. The results show that the measured temperature curve of the battery is in good agreement with the simulation results,which verifies the feasibility of the model. Moreover,with the increase of discharge rate,the faster the temperature rise of the battery is,the larger the maximum temperature and maximum temperature difference are.

关 键 词：锂电池 温度场 电化学热耦合模型 

分 类 号：TH16[机械工程—机械制造及自动化] TP391.9[自动化与计算机技术—计算机应用技术]