Numerical simulation on power battery thermal management of double layers serpentine channel cold plate
For the high-energy-density power batteries of electric vehicles,a double-layer serpentine chan-nel 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 maxi-mum temperature,temperature difference of battery module,and coolant pressure loss were analyzed suc-cessively.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 cool-ant 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.
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