Optimization of efficient thermal management channel for battery pack based on genetic algorithm

doi:10.19799/j.cnki.2095-4239.2021.0131

Abstract

Abstract:

The thermal management of the battery pack is essential to avoid problems such as overheating and thermal runaway. An active cooling system must be used to maintain a safe temperature of the battery and improve the performance and life of the battery. Liquid cooling is an effective cooling method, but parameterized research on the influence of structural parameters on cooling effects is still lacking. In this paper, a liquid cooling method based on a micro channel silicon-based cold plate is used, and a fluid-solid coupling heat dissipation model is established by using computational fluid dynamics. The Latin super vertical method is used to generate parameter combination samples and a cooling system with efficient heat dissipation performance and lower energy consumption is developed through a multi-objective genetic optimization method. Experimental results show that the optimized liquid cooling system is sufficient to control the temperature of the module below 45 ℃, and the temperature deviation between single cells can also be controlled within a small range of 2 ℃. The results of this study will provide effective research ideas for the design and optimization of the thermal management system of battery components, and will help promote the application of batteries in actual products.

Key words: battery pack, thermal management, genetic algorithm, CFD simulation

CLC Number:

TM 912

Yinquan HU, Heping LIU. Optimization of efficient thermal management channel for battery pack based on genetic algorithm[J]. Energy Storage Science and Technology, 2021, 10(4): 1446-1453.

Figures/Tables 16

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设计参数	约束范围
翅片高度h/mm	2～6
翅片节距s/mm	2～4
错齿长度l/mm	3～6

参数名称	部分最优解
参数名称	1	2	3	4	5
Q/W·m^-2	5200	5400	5500	5700	6000
ΔP/kPa·m^-1	40	50	60	79	80
s/mm	2.2	2.5	3.2	3.5	3.7
h/mm	2.8	2.5	3.2	3.5	4.2
l/mm	3.3	3.6	4.1	4.5	5.3

材料/属性	密度/kg·m^-3	比热容/J·(kg·K)^-1	导热系数/W·(m·K)^-1
铝	2700	900	220
冷却液	1040	3679	0.4043

名称	数值
电池质量/g	500
标称容量/A·h	20
标称电压/V	3.2
最大放电电流/A	150
内阻/Ω	≤5
标称放电电流/A	5

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