Open Access

ARTICLE

Optimization of the Heat Dissipation Structure and Temperature Distribution in an Electric Vehicle Power Battery

by Hongwang Zhao, Yuanhua Chen, Xiaogang Liu

1 College of automotive and Transportation Engineering, Guilin University of Aerospace Technology, Guilin, 541004, China.
2 Guangxi Colleges and Universities Key Laboratory of Robot & Welding, Guilin University of Aerospace Technology, Guilin, 541004, China.

* Corresponding Author: Hongwang Zhao. Email: .

(This article belongs to the Special Issue: EFD and Heat Transfer)

Fluid Dynamics & Materials Processing 2019, 15(4), 293-305. https://doi.org/10.32604/fdmp.2019.08361

Abstract

In order to ensure that the lithium-ion battery pack keeps good working performance during the driving of electric vehicle, the heat generation mechanism and heat transfer characteristics of lithium-ion battery are analyzed. The power battery pack of electric vehicle is simulated by advanced vehicle simulator. The simulation results of battery pack current under typical cycle conditions and the heat source curve of lithium ion battery are obtained, which provide data for the simulation of heat source input of battery temperature field. On this basis, the flow field and temperature fiel d of the original lithium-ion battery pack of electric vehicle are simulated by using computational fluid dynamics method. The influence of different air passage spacing and air inlet angle on the temperature field of lithium ion battery pack was analyzed. The optimization scheme of heat dissipation structure of lithium ion battery pack was put forward, and the numerical simulation analysis of the optimization scheme was carried out. The results show that the heat dissipation effect of the heat dissipation structure is obviously improved by choosing the appropriate air inlet and the combined air passage spacing, and it is beneficial to the uniformity of the temperature of the single battery. The maximum temperature of the battery pack is reduced by 3.8°C, and the temperature difference of the battery pack is reduced by 2.2°C.

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