Design optimization of a novel branched-channel fin liquid cooling plate for lithium-ion batteries

doi:10.3969/j.issn.1674-8484.2025.03.010

Abstract

Abstract:

A new type of liquid cooling plate structure based on finned type was proposed to improve the comprehensive performance of the battery thermal management system. Firstly, a rhombic finned plate liquid cooler was selected as the experimental object, and the influence of different fin structures and different fin arrangements on the heat dissipation performance of the liquid cooler was investigated. Secondly, a new fin structure was proposed based on the optimized finned plate. Finally, the NSGA-II algorithm was used for multi-objective optimization, and it was analyzed that the influence of structural parameters (fin opening wide, fin outer contour thickness, fin inner cavity wide) on the average temperature and pressure drop. The results show that the elliptical finned plate liquid cooler with a 3×8 arrangement has a 9% improvement in comprehensive performance compared to the rhombic finned plate liquid cooler, with an average temperature drop of about 0.1℃ and a pressure drop reduction of 0.43 Pa. After adding branch channels inside the elliptical fins, the average temperature of the new fin structure after multi-objective optimization drops by 0.257℃ (0.7%), and the pressure drop drops by 0.784 Pa (16.31%), indicating that the cooling performance of the liquid cold plate has been effectively improved, thereby providing a new approach and theoretical basis for the design and analysis of heat sinks.

Key words: battery thermal management, finned liquid cold plate, multi-objective optimization algorithm, numerical simulation

CLC Number:

TK124

XIE Yuanpeng, ZHANG Furen, TAN Haikun, XIAO Kang, QIU Shuaishuai, SUN Shizheng. Design optimization of a novel branched-channel fin liquid cooling plate for lithium-ion batteries[J]. Journal of Automotive Safety and Energy, 2025, 16(3): 443-451.

Figures/Tables 17

References 24

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冷板模型	翅片形状	翅片尺寸/ mm
A1	菱形	长轴11.27 ，短轴7.52
A2	菱形	长轴11.27 ，短轴7.52
A3	长方形	长边7.97 ，短边5.32
A4	长方形	长边7.97 ，短边5.32
A5	正方形	边长6.51
A6	椭圆形	长径9.0，短径6.0
A7	椭圆形	长径9.0，短径6.0
A8	圆形	半径7.35

冷板模型	翅片形状	翅片尺寸/ mm
A1	菱形	长轴11.27 ，短轴7.52
A2	菱形	长轴11.27 ，短轴7.52
A3	长方形	长边7.97 ，短边5.32
A4	长方形	长边7.97 ，短边5.32
A5	正方形	边长6.51
A6	椭圆形	长径9.0，短径6.0
A7	椭圆形	长径9.0，短径6.0
A8	圆形	半径7.35

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

q_m / (g?s^-1)	θ_exp/ ℃	θ_sim/ ℃	σ / %
0.5	41.26	40.94	0.8
1	34.06	33.16	2.7
1.5	31.77	31.24	1-7
2	30.63	29.60	3.5