Numerical simulation on power battery thermal management of double layers serpentine channel cold plate

Abstract

Abstract: For the high-energy-density power batteries of electric vehicles, a double-layer serpentine channel cold plate on the battery bottom is proposed for a nickel-cobalt-manganate lithium battery module in order to improve the batteries thermal management and ensure their safety. The optimal coolant flow scheme is the first scheme and the optimal channel width is 10 mm determined by numerical simulation.The influences of coolant mass flow rate, battery’s discharge rate and ambient temperature on the maximum temperature, temperature difference of battery module, and coolant pressure loss were analyzed successively. The results show that with the increase of discharge rate and ambient temperature, both the maximum temperature and temperature difference of the module increase. Increasing the flow rate of coolant can effectively control the maximum temperature of the battery, but this comes at the cost of increased pressure loss. Notably, when the discharge rate is less than 0.7 C, it is no longer necessary to start the liquid cooling system.

Key words: square lithium-ion battery, serpentine channel, cold plate, Fluent

CLC Number:

ZHANG Quan, ZHANG Chun-hua, ZHANG Zi-ye. Numerical simulation on power battery thermal management of double layers serpentine channel cold plate[J]. Journal of Lanzhou University of Technology, 2024, 50(5): 62-70.

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