基于TEC的锂电池液冷系统建模及热力学特性分析  

The Modeling and Thermodynamic Performance Analysis of Lithium Battery Liquid Cooling System Based on TEC

作　　者：许慧娟[1] 毕艳军[1] 于敏丽[1] XU Hui-juan;BI Yan-jun;YU Min-li(Xingtai Polytechnic College,Xingtai,Hebei 054035,China)

机构地区：[1]邢台职业技术学院,河北邢台054035

出　　处：《邢台职业技术学院学报》2020年第3期74-77,共4页Journal of Xingtai Polytechnic College

基　　金：邢台市科技计划项目——“基于热电制冷的纯电动汽车锂电池热管理系统研究”,项目编号:2019ZC025。

摘　　要：针对锂离子电池组功率密度大、充电及运行中的温度较高以及温度分布不均匀等热安全性问题,设计了一种基于TEC的锂电池高均温冷板液冷散热系统。采用集总参数法建立了系统的仿真模型,完成了工质入口温度扰动、工质流量扰动、TEC驱动电流扰动等3种扰动工况对系统热力学特性的仿真分析,验证了TEC的温控性能。结果表明:流体工质入口温度的变化对冷板温差没有影响,但是会影响系统的稳态时间;流体工质流量越大,对应的冷板温差越小,系统达到稳态的时间也越短;加上TEC作用后,冷板温差明显减小。Aiming at the thermal safety problems such as high power density,high temperature during charging and operation,and uneven temperature distribution,a liquid cooling system based on TEC for lithium battery with high average temperature cold plate was designed.The simulation model of the proposed system was established by using lumped-parameter method,and the thermodynamic characteristics of the system were simulated and analyzed under three disturbance conditions,namely the temperature disturbance at the inlet of the working medium,the flow disturbance of the working medium,and the TEC driving current disturbance.The results show that the inlet temperature of the fluid has no effect on the temperature difference of the cold plate,but it will affect the steady-state time of the system.The larger the flow rate of the fluid is,the smaller the temperature difference of the cold plate will be,and the shorter the time for the system to reach steady state will be.With the assistance of TEC,the temperature difference of the cold plate decreases obviously.

关 键 词：热电制冷 锂电池 液冷散热 冷板 集总参数 

分 类 号：TM912[电气工程—电力电子与电力传动]