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过程工程学报 ›› 2021, Vol. 21 ›› Issue (10): 1236-1244.DOI: 10.12034/j.issn.1009-606X.220283

• 环境与能源 • 上一篇    

基于滤板调控风量的电池组风冷性能分析与优化

储广昕1,2,3， 尉孟涛1,2,3*   

  1. 1. 天津工业大学电气工程与自动化学院，天津 300387

    2. 天津工业大学天津市电工电能新技术重点实验室，天津 300387

    3. 天津工业大学大功率半导体照明应用系统教育部工程研究中心，天津 300387

  • 收稿日期:2020-08-28 修回日期:2020-11-17 出版日期:2021-10-28 发布日期:2021-10-26
  • 通讯作者: 储广昕 459971850@qq.com

Analysis and optimization of air cooling performance of battery pack based on air volume regulated by filter plate

Guangxin CHU1,2,3,  Mengtao YU1,2,3*   

  1. 1. School of Electrical Engineering and Automation, Tiangong University, Tianjin 300387, China

    2. Tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tiangong University, Tianjin 300387, China

    3. Engineering Research Center of High Power Solid State Lighting Application System, Ministry of Education, Tiangong University, Tianjin 300387, China

  • Received:2020-08-28 Revised:2020-11-17 Online:2021-10-28 Published:2021-10-26

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摘要： 首先通过搭建测试平台，对18650锂离子电池单体容量、内阻和温升进行实验测试；再对比单体温升仿真与实验结果的一致性；最后建立了动力锂离子电池组模型，通过单因素分析和正交实验，研究过滤板自由面积比、电池间距、风速和电池距离底部间距对电池组最高温度和温差的影响。电池以1 C放电时得出结论：添加过滤板提升了电池组温度场一致性，过滤板自由面积比为0.1, 0.9, 0.9时电池组温差最小。最终通过正交实验得到最佳组合为风速6 m/s、电池间距4 mm、电池距离底部间距4 mm，比优化前最高温度下降了22.5%，温差下降了74.8%。

关键词: 18650锂离子电池, 风冷, 正交实验, 过滤板

Abstract: With the global trend of advocating environmental protection, energy conservation and emission reduction, and low-carbon travel, electric vehicles have been vigorously developed. As the power source of electric vehicle, power battery pack is one of the core components of electric vehicle. At present, the mainstream battery used in electric vehicles at home and abroad is lithium-ion battery, which has the advantages of high power density and energy density, low cost, long service life and no memory effect. But its performance is greatly affected by temperature. Therefore, it is imperative to carry out thermal management of electric vehicles. Firstly, the capacity, resistance and temperature rise of 18650 lithium-ion battery were tested by building a test platform; then, the consistency between the simulation results of single temperature rise and the experimental results was compared; finally, the power lithium-ion battery pack model was established, through single factor analysis and orthogonal experiment, the effects of filter plate free area ratio, battery spacing, wind speed and battery bottom distance on the battery were studied. The influence of maximum temperature and temperature difference were studied. When the battery was discharged at 1 C, it was concluded that adding filter plate improves the consistency of temperature field of battery pack, and the temperature difference of battery pack was the minimum when the free area ratio of filter plate was 0.1, 0.9 and 0.9. With the increase of wind speed, the maximum temperature decreased,temperature difference of battery pack first increased and then decreased. With the increase of battery spacing, the maximum temperature of battery pack first increased and then decreased, the temperature difference first increased, then decreased and increased at last.With the increase of the distance from the bottom of the battery, the maximum temperature of the battery pack first decreased and then increased. Finally, the best combination of 6 m/s, 4 mm and 4 mm was obtained by orthogonal experiment, which decreased 22.5% and 74.8% respectively compared with the maximum temperature and temperature duffurence before optimization.

Key words: 18650Li-ion battery, air cooling, orthogonal experiment, Filter plate