Performance optimization of a snake-like channel liquid cooled plate for lithium-ion power batteries

doi:10.3969/j.issn.1674-8484.2023.03.014

Abstract

Abstract:

A liquid cooling plate with serpentine channel structure was propose to improve the heat dissipation performance of the lithium-ion power battery thermal management system with a more uniform temperature distribution. The liquid cooling plate in the serpentine passage was preliminarily optimized. The temperature uniformity of the liquid cooling plate was improved by adding fins in the passage and opening a guide channel. The optimal solution of the channel structure of the liquid cooling plate was obtained through multi-objective genetic algorithm optimization, with the structural parameters of the cold plate (the percentage of the fin width in the passage, the channel connection width, and the gap) as variables, and the average temperature and pressure drop as optimization objectives. The software CFD (computational fluid dynamics) was used to verify the accuracy of the optimization results. The results show that the heat dissipation performance of the liquid cooled plate after multi-objective optimization is effectively improved with an average temperature reduced by 6.19 K and a temperature standard deviation reduced by 5.19 K compared with the initial structure.

Key words: lithium-ion power batteries, battery thermal management, liquid cooling plate, structural design, multiple objective optimization

CLC Number:

U469.7

LI Xue, ZHANG Furen, LU Xinglong, HUANG Zhikai, ZHAO Haodong, SHI Yazhou. Performance optimization of a snake-like channel liquid cooled plate for lithium-ion power batteries[J]. Journal of Automotive Safety and Energy, 2023, 14(3): 385-392.

Figures/Tables 18

References 27

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放电倍率	I / A	Q_V / (kW·m^-3)	Q_A / (kW·m^-2)
1 C	15.0	15.9	0.287
2 C	30.0	42.9	0.771
3 C	45.0	80.8	1.454
4 C	60.0	129.7	2.334
5 C	75.0	189.6	3.412

放电倍率	I / A	Q_V / (kW·m^-3)	Q_A / (kW·m^-2)
1 C	15.0	15.9	0.287
2 C	30.0	42.9	0.771
3 C	45.0	80.8	1.454
4 C	60.0	129.7	2.334
5 C	75.0	189.6	3.412

范围	X₁， l₁ / %	X₂， l₂ / %	X₃， d / mm	X₄， a / mm
上限	95	50	1.4	26.0
初值	70	60	1.2	11.0
下限	75	85	1.0	11.0

范围	X₁， l₁ / %	X₂， l₂ / %	X₃， d / mm	X₄， a / mm
上限	95	50	1.4	26.0
初值	70	60	1.2	11.0
下限	75	85	1.0	11.0

样本	设计变量				优化目标
样本	X₁， l₁ / %	X₂， l₂ / %	X₃， d / mm	X₄， a / mm	Y₁, θ_ave/ ℃	Y₂, ?p/ Pa
1	94.7	74.9	1.2	20.9	39.1	78.9
2	85.9	77.3	1.0	14.6	39.3	70.9
3	77.0	63.1	1.1	17.9	40.1	57.9
...	...	...	...	...	...	...
48	92.3	61.3	1.3	23.7	39.2	72.8
49	90.3	69.6	1.3	16.9	39.2	72.0
50	80.8	51.2	1.1	13.3	40.1	57.1