Analysis of Temperature-humidity Coupled Characteristics of Vehicle Power Battery Pack

被引：0
|
作者：
Lan F.-C. [1 ,2 ]
Jiang X.-P. [1 ,2 ]
Chen J.-Q. [1 ,2 ]
Zeng W.-B. [3 ]
机构：
[1] School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou
[2] Guangdong Province Key Laboratory of Vehicle Engineering, South China University of Technology, Guangzhou
[3] China National Electric Apparatus Research Institute Ltd., Guangzhou
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2022年 / 35卷 / 05期
关键词：
Automotive engineering; Environmental adaptability; Power battery pack; Temperature-humidity coupled characteristics; Transient numerical analysis;
D O I：
10.19721/j.cnki.1001-7372.2022.05.022
中图分类号：
学科分类号：
摘要：
The formation of moisture and condensation inside vehicle power battery packs is caused by the coupling effect of temperature and humidity. This formation directly affects the battery performance, aggravates battery failure, and may cause accidents. However, related research has not been conducted extensively. Hence, it is urgent to analyze the internal temperature and humidity coupling characteristics of battery packs. A transient numerical analysis method was developed in this study to evaluate the temperature and humidity distributions inside a battery pack. First, the gas exchange and heat transfer between the external and internal environments of the battery pack were analyzed to establish the physical model of the heat-humidity transfer. Based on the laws of conservation of mass, momentum, and energy and the coupling relationship between temperature and humidity, the corresponding mathematical model of heat and moisture transfer was established. Heat-humidity transfer experiments were performed using a constant temperature and humidity box and a battery pack with a waterproof air vent valve. The experimental data verified the coupled effect of the dynamic temperature and humidity of the external environment on the temperature and humidity inside the battery pack and the condensation and water accumulation conditions inside the battery pack. A multiphysics coupled 3D simulation model was established to perform transient numerical simulation of the heat and moisture transfer and coupled temperature-humidity process inside and outside the battery pack. The reliability of the model was verified through a comparison between the simulation and experimental results. Actual climatic data were used to define the dynamic environment outside the battery pack in the model. The transient calculation results for the temperature and humidity inside the battery pack were analyzed based on time and space distributions. The results verify the feasibility of the proposed method and show the effects of the dynamic changes in the external environment and the working state of the battery on the temperature and humidity distributions in the battery pack and the condensation duration on the battery surface. © 2022, Editorial Department of China Journal of Highway and Transport. All right reserved.
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页码：231 / 242
页数：11
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