Parameter Research and Performance Optimization of Air-cooled Battery Thermal Management System
To improve the cooling capacity of air-cooled battery thermal management system,a wet pad is applied to pre-cool the air before it passing through the battery pack.Fluent software was used to simulate the temperature field of battery packs under different charge rate and number of cells,and the temperature uniformity was improved by wrapping aluminum sheets on the external of each battery.The results show that compared with a traditional air-cooled battery thermal management system,the use of wet pad can reduce the maximum surface temperature of the battery,which is more adaptable to the heat dissipation needs of battery packs with higher charge rate and cell numbers.At the same time,the temperature uniformity is slightly deteriorated via the wet pad.At 2C charge rate,the battery pack temperature difference of the both systems go beyond the limit of 5℃when the number of batteries is 45.The method of wrapping aluminum sheets outside the battery to improve the temperature uniformity of the battery pack shows that it can effectively reduce the temperature of the rear battery to cope with high charge rate heat dissipation.When the charge rate is 2C and the number of batteries is 60,the maximum temperature difference of the battery pack decreases from 6.90℃to 5.68℃.
Battery thermal managementForced air coolingDirect evaporative coolingCFD simulationTemperature uniformity
万方数据
维普
