Flow and Heat Transfer Based on Oblique-Fin-Typed Liquid-Cooling Plate

doi:10.3969/j.issn.1001-2222.2025.02.008

Vehicle Engine ›› 2025, Vol. 0 ›› Issue (2) : 48. DOI: 10.3969/j.issn.1001-2222.2025.02.008

ZHANG Yushun，MU Nasi，HAN Yong，PAN Di

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Abstract

The heat exchange efficiency and temperature distribution of liquid-cooling plate inside the lithium battery pack are the key factors determining the temperature control of battery cells inside the pack and the difference in temperature. Therefore, the structural design and layout of liquid-cooling plate has always been the most critical object in the development of battery thermal management system. A new high-efficiency heat exchange oblique-fin-typed liquid-cooling plate structure was proposed to be suitable for the liquid cooling system in lithium battery pack, and the orthogonal test method was used to study the structure with full characteristic structural parameters. The maximum battery surface temperature, the temperature difference between the battery surface and the liquid-cooling plate pressure drop were selected as response quantities. The structural parameter that was the most sensitive to the amount of response, the height of oblique fin, was thus obtained by polar analysis. Finally, the numerical simulation and performance evaluation criteria(PEC) were applied to fully investigate and analyze the effects of oblique fin height and inlet Reynolds number on the overall thermal performance of liquid-cooling plate. The results show that increasing the oblique fin structure in the traditional DC channel can effectively cause disturbed flow and increase the effective convective heat exchange area of liquid-cooling plate, which greatly improves the heat exchange performance of liquid-cooling plate. Compared to the traditional DC channel liquid-cooling plates, higher oblique fins tend to bring a certain amount of pressure drop loss, but its excellent heat dissipation performance can compensate for the extra loss.

Key words

lithium battery / liquid cooling / cooling system / pressure drop / temperature / flow characteristic

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ZHANG Yushun, MU Nasi, HAN Yong, PAN Di. Flow and Heat Transfer Based on Oblique-Fin-Typed Liquid-Cooling Plate[J]. Vehicle Engine. 2025, 0(2): 48 https://doi.org/10.3969/j.issn.1001-2222.2025.02.008