TENG Fei, ZHU Chuanmin, YANG Canglu

 

(School of Mechanical Engineering, Tongji University, Shanghai 200001, China)

 

 

Abstract: Aiming at the problem of control temperature rise of electric vehicle power supply unit, and thermal characteristics of electric vehicle power supply unit for lithium ion battery packs were analyzed, establishing the mathematical model of lithium ion battery, presents a simulation study method for lithium ion battery. Through the research on the internal structure of lithium battery, understand the heat generation mechanism, using Fluent software, analysis of 3D thermal model of battery. Respectively in the influence effect of different discharge rate and the monomer battery temperature and different temperature on 1C discharge rate of the monomer battery temperature rise simulation, and the simulation results were compared. The results indicate that the ratio, the temperature rise of the main battery and charging and discharging the environment temperature on. Charge and discharge rate is high, the monomer battery temperature rise quickly, and the initial temperature is higher, the monomer battery temperature is the same of the discharge rate of the imbalance.

 

Key words: lithium battery; CFD simulation; temperature field