Research on cooling and fixing of lithium-ion battery cooling and fixed integrated cold plate heat dissipation

doi:10.19799/j.cnki.2095-4239.2023.0492

Abstract

Abstract:

The study presents the design of an integrated liquid-cooled plate based on the heat generation characteristics of cylindrical lithium-ion batteries. The effects of inlet flow rate, ambient temperature, and depth of cooling fixed hole on the cooling performance of the integrated liquid-cooled plate were investigated through numerical simulations, and the performance was compared with that of the honeycomb liquid-cooled plate. The results showed that the integrated liquid-cooled plate outperforms its honeycomb counterpart in reducing the maximum temperature of the lithium-ion battery pack. Although the minimum temperature of the battery pack remains higher in the integrated system than that in the honeycomb system under similar ambient conditions, the maximum temperature variation within the battery pack diminishes by an average of 13.3% in the integrated system. Additionally, the integrated plate weighs 9.7% less than the honeycomb plate. As the inlet flow rate of the integrated liquid-cooled plate increased from 30 ml/min to 60 ml/min, the maximum and minimum temperatures of the battery pack decreased considerably, accompanied by a reduction in the maximum temperature difference by 0.458 K and an increase in pressure loss from 352 Pa to 832 Pa. Increasing the depth of the cooling fixed hole led to a gradual decline in the maximum temperature and a corresponding increase in the minimum temperature; both lied within the optimal operating range of lithium-ion batteries. As the hole depth increased from 7 mm to 13 mm, the maximum temperature difference in the battery pack decreased by 20.8% and the weight of the cooling fixed structure increased by 46.2%. At the ambient temperatures of 296.15 K, 298.15 K, 300.15 K, and 302.15 K, the maximum and minimum temperatures of the battery pack were very close to each other after a charge-discharge cycle, with the maximum temperature difference of the battery pack exhibiting a peak at 302.15 K, which is higher than that at other temperatures.

Key words: thermal management of battery, power lithium battery, liquid cooling

CLC Number:

TM 911

Guangqiang SUN, Zhiqiang LI, Fang WANG, Hong DENG, Yichun BA. Research on cooling and fixing of lithium-ion battery cooling and fixed integrated cold plate heat dissipation[J]. Energy Storage Science and Technology, 2023, 12(11): 3352-3360.

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项目	密度/(kg/m³)	比热容/[J/(kg·K)]	导热系数/[W/(m·K)]
冷却液	1071	3300	0.384
电芯	1760	1108	3.91(径向)/23(轴向)

项目	一体化冷板	蜂窝状冷板
最高温度平均值/K	301.483	301.598
最低温度平均值/K	300.158	300.065
最大温差平均值/K	1.325	1.533

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