Effect of internal structure combination optimization on cooling performance of cold plate

doi:10.3969/j.issn.1674-8484.2022.02.018

Abstract

Abstract:

A liquid cooling plate with uniform straight channel and array fins was proposed to optimize the cooling performance of battery pack. Based on the evaluation method of the computational fluid dynamics (CFD), the cooling performance of the established model was analyzed and optimized. It was investigated under 5 C discharge condition that the effects of different combination forms of channels and array fins in the liquid cooling plate, inlet and outlet width, fin size and the spacing between upper and lower cooling tanks on battery thermal management. The results show that the use of channels on both sides of the middle fin can change the maximum temperature, the average temperature and temperature difference, and the inlet and outlet width significantly change the inlet and outlet pressure drop. Compared with the original model, when the mass flow rate is 0.5 g/s, the optimization model meets the maximum temperature of 39.99 °C, the average temperature is reduced by 0.93 °C, while the temperature standard deviation and inlet and outlet pressure drop are reduced by 0.09 °C and 494.68 Pa, respectively; the coolant mass flow rate has a certain degree of influence on the heat dissipation performance of the liquid cold plate.

Key words: battery thermal management, straight channel, array fins, liquid cooling plate, cooling performance

CLC Number:

TM912.9

ZHANG Furen, LU Fu, WU Bo, XIAO Kang. Effect of internal structure combination optimization on cooling performance of cold plate[J]. Journal of Automotive Safety and Energy, 2022, 13(2): 368-377.

Figures/Tables 24

References 21

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规格	15 Ah
额定电压	3.2 V
质量	0.35 kg
尺寸	18 mm ×140 mm × 65 mm
内阻	4 m?
放电截至电压	2.25 V
充电上限电压	3.65 V
持续放电电流	3 C
瞬间放电电流	5 C

规格	15 Ah
额定电压	3.2 V
质量	0.35 kg
尺寸	18 mm ×140 mm × 65 mm
内阻	4 m?
放电截至电压	2.25 V
充电上限电压	3.65 V
持续放电电流	3 C
瞬间放电电流	5 C

热通量,j	3.412 kW/m^-2
热表面积,A	9 100 mm²
入口温度,θ_in	25 ℃
出口压力(表压),p_out	0 Pa
入口质量流量, Q_m	0.1 g/s ~ 1.0 g/s

热通量,j	3.412 kW/m^-2
热表面积,A	9 100 mm²
入口温度,θ_in	25 ℃
出口压力(表压),p_out	0 Pa
入口质量流量, Q_m	0.1 g/s ~ 1.0 g/s

放电倍率	单位体积产热量 kW·m^-3	热通量 kW·m^-2
1 C	15. 94	0.29
2 C	42. 86	0.77
3 C	80. 77	1.45
4 C	129. 67	2.33
5 C	189. 56	3.41