To address the limitations of air-cooled battery cooling modules in terms of temperature field uniformity,and to optimize the battery pack air cooling structure and parameters,the COMSOL Multiphysics software was used to establish the simulation model of battery pack cooling and heat dissipation.The transient physical field analysis is carried out in the composite heat dissipation structure.A new type of composite heat dissipation scheme combining air cooling and heat pipe is designed.The effects of different fin spacing,air velocity and inlet temperature on the temperature field of battery pack are studied.The results show that the fin spacing is the main factor affecting the heat dissipation effect.The double inlet and double outlet structure and the design heat pipe are used for composite design,the cell spacing is set to 4 mm,the gas flow rate is set to 6 m/s.The results show that the maximum temperature is 32.3℃and the difference is 1.9℃.The optimization results improve the control of battery temperature to a greater extent,and enhance the temperature field uniformity,so it provides a reference for the application of the new composite heat dissipation scheme in electric vehicles.
power batterycomposite coolingelectrochemical-thermal coupled modelstructural design and optimization
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