Design of high-power DC charging thermal management system for electric vehicles
In order to improve the charging efficiency of power battery under the condition of high-power DC charging,a battery thermal management system based on heat pump for charging stations was proposed.Taking the power battery of an electric vehicle as an example,the temperature characteristics and charging time of the thermal management system under the condition of high-power DC charging at five different conditions of-20,-10,0,20 and 40 ℃ were analyzed.The two system models were modeled using numerical simulation software for analysis,and the results show that the proposed system has fast response,high efficiency,and can maintain the maximum temperature below 50℃.Compared with the original system,the proposed system reduces the charging time of the power battery by 10.6％,17.9％,and 24.6％at 0,-10 and-20℃ operating conditions,respectively.It also saves 1.4％and 6.0％of the charging time at 20 and 40℃ operating conditions,respectively.Comparing the charging time for the power battery at each stage,the proposed system mainly reduces the charging time in the range of 0～20％of the battery state of charge compared to the original system.
electric vehiclehigh-power chargingbattery thermal managementcharging time
万方数据
维普
