Heat transfer characteristics of lithium-ion battery thermal management system with spoiler structure

doi:10.19799/j.cnki.2095-4239.2024.0581

Abstract

Abstract:

To address the complex thermal challenges in lithium-ion battery thermal management systems during charging and discharging, a physical model of a multi-channel battery pack thermal management system with a spoiler structure was developed and validated using measured parameters of a single battery. Numerical simulations based on the finite volume method were performed for both non-spoiler and various spoiler configurations. The Nusselt number and Fanning friction coefficient were used to characterize the heat transfer and flow characteristics of the battery pack system. The impact of different spoiler parameters, including angle, length, and arrangement, on the heat transfer and flow characteristics of the battery pack were analyzed through numerical simulations. The results indicate that the spoiler structure enhances turbulence intensity, improves convective heat transfer efficiency on the battery cell surface, and increases the system's pressure difference. As the spoiler angle increases, the maximum temperature and temperature difference of the battery pack initially increase and then decrease. Conversely, increasing the spoiler length causes the maximum temperature and temperature difference to first decrease and then increase. Optimal thermal performance is achieved with a spoiler angle of 45° and a length of 15 mm. When the spoiler length and angle are fixed, the arrangement of the spoiler structures has a minor effect on the thermal characteristics but still performs better than the non-spoiler configuration. These findings provide valuable insights and a robust foundation for designing and optimizing thermal management systems for multi-channel battery packs in lithium-ion battery charging and discharging equipment.

Key words: lithium-ion battery, thermal management system, spoiler structure, heat transfer, air cooling

CLC Number:

TM 911

Heng QIAN, Jian LIU, Yulei HUO. Heat transfer characteristics of lithium-ion battery thermal management system with spoiler structure[J]. Energy Storage Science and Technology, 2024, 13(11): 3889-3897.

Figures/Tables 14

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充放电倍率	能量/Wh	损耗/Wh	流程时间/h	平均功率/W
0.5C充电	117.559	4.259	2.38	0.95
0.5C放电	113.300	4.259	2.08	0.95
1.0C充电	118.006	5.319	1.49	2.10
1.0C放电	112.687	5.319	1.04	2.10
1.5C充电	118.431	8.464	1.28	4.32
1.5C放电	109.967	8.464	0.68	4.32

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