Modeling and thermal analysis of liquid cooling system for lithium-ion battery packs
Recently,the application of power lithium batteries in new energy vehicles has become increasingly widespread,and the thermal safety issues of energy storage units,particularly lithium-ion batteries,have received extensive attention.Geometrical modelling and thermal analysis of the battery pack by utilizing COMSOL Multiphysics software to simulate the lumped parameterized lithium-ion battery pack liquid cooling system was performed.Then the impact of the liquid cooling system or passive cooling system on the operating temperature of the battery were investigated and compared,and the effects of battery discharge multiplier,coolant temperature,and coolant flow rate on the cooling efficiency of the liquid cooling system were further explored.The results indicated that a high discharge rate led to an increase in both the maximum temperature of the battery pack and the maximum temperature difference.Considering cooling costs,a coolant temperature of 20 ℃ was found to be optimal when the ambient temperature was 20 ℃.The coolant flow rate had a relatively minor impact on the thermal performance of the battery pack.By implementing the liquid cooling system,the temperature of the battery pack could be effectively controlled,providing a strong reference for optimizing the liquid cooling system.
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维普
