Research on heat dissipation of cold plates with honeycomb and fork channels of lithium batteries

doi:10.19799/j.cnki.2095-4239.2024.1079

Abstract

Abstract:

To effectively enhance the temperature uniformity of cylindrical lithium-ion batteries, this study proposes an innovative honeycomb-branching channel cold plate. A numerical simulation method was used to develop a cooling model for cylindrical lithium-ion battery packs, incorporating this unique cold plate design. The study focused on two critical factors affecting cooling performance: coolant temperature and channel branch angle. Performance comparisons were also made with two other designs, the honeycomb-serpentine channel cold plate and the planar serpentine channel cold plate, for a comprehensive evaluation. Results demonstrated that the honeycomb-branching channel cold plate effectively minimized the maximum temperature difference within the battery pack, especially under high coolant temperature conditions. The branch angle of the channels was found to weakly affect the peak temperature of the battery pack, offering flexibility in design options. Furthermore, compared to the honeycomb-serpentine and planar serpentine channel cold plates, the honeycomb-branching channel cold plate significantly lowered both the peak temperature and the maximum temperature difference of the battery pack, all while reducing energy consumption. This design proved especially effective in cooling high heat generation regions within the battery electrodes, making it a promising solution for thermal management systems seeking improved cooling performance and energy performance.

Key words: liquid cooling, 26650 battery, lithium battery thermal management, bifurcation channel

CLC Number:

TM 911

Zhiqiang LI, Yichun BA, Guangqiang SUN. Research on heat dissipation of cold plates with honeycomb and fork channels of lithium batteries[J]. Energy Storage Science and Technology, 2025, 14(5): 1776-1783.

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项目	密度/(kg/m³)	比热容/[J/(kg·K)]	热导率/[W/(m·K)]
冷却液	1071	3300	0.384
电池单体	1760	1108	3.91/3.91/23

时间/s	功率/W生发	体热源密度/(W/m³)	时间/s	功率/W	体热源密度/(W/m³)
0	0.227	6581	2160	0.465	13481
360	0.257	7450	2520	0.566	16409
720	0.196	5682	2880	0.623	18061
1080	0.054	1565	3240	0.293	8494
1440	0.085	2464	3600	0.513	14872
1800	0.168	4870	3960	0.426	12350
2160	0.289	8378	4320	0.395	11451

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