双对象控制策略对直冷系统温控及电动汽车能量流影响特性OA

Thermal-management systems for electric vehicles have become a key research focus for enhancing cabin thermal comfort and battery performance.This study proposes a direct-cooling system architecture to address the different temperature-response characteristics of cabins and power batteries.A dual-objective temperature-control strategy is developed based on ambient temperature,vehicle operating status,and real-time load temperature information,enabling the dynamic adjustment of thermal-control priorities between the cabin and battery to ensure optimal system performance.A thermal-management system test bench is constructed in an environmental chamber,and a simulation model of the vehicle thermal-management system is developed.Performance comparisons are conducted between the three control strategies under various driving conditions and ambient temperatures.The results demonstrate that the dual-objective strategy exhibits superior temperature-control capability and energy efficiency across different environmental conditions,along with optimal battery state-of-charge(SOC)recovery performance.Under 35℃ high-temperature conditions,the cabin and battery reach target temperatures within 51 s and 547 s,respectively.Under-7℃ low-temperature conditions,they reach preset values within 127 s and 365 s,respectively,with significantly improved SOC recovery rates.Although the dual-objective strategy slightly increases energy consumption(approximately 1.2％-3.0％ higher than the cabin-priority strategy),it substantially enhances the battery thermal-control efficiency and overall system performance,demonstrating high potential for practical applications.