基于电机余热回收的电动汽车综合热管理系统分析

Analysis of integrated heat management system of electric vehicle based on motor waste heat recovery

为了降低电动汽车能量消耗,提高乘员舱舒适性,该文提出一种集空调、电池预热和电机余热回收为一体的电动汽车热管理系统。进行了电动汽车热管理系统设计与理论分析,制定了整车温度控制策略。在AMESim环境下搭建了由驱动系统、电池温控系统和乘员舱等组成的整车热管理系统仿真模型,对其在不同环境温度、不同运行工况下的特性进行了仿真分析。结果表明:在冬季寒冷工况下采用正温度系数(PTC)电加热器及电机废热共同加热乘员舱的方法,降低了乘员舱PTC电加热器的使用时间,电池荷电状态(SoC)在车辆运行中的消耗降低0.20%~3.98%,整车温度控制策略有效可行。

In order to reduce the energy consumption of electric vehicles and improve the comfort of the passenger cabin,a thermal management system for electric vehicles is proposed that integrates air conditioning,battery preheating and motor waste heat recovery.The thermal management system of electric vehicles is designed and theoretically analyzed,and the vehicle temperature control strategy is formulated.Aiming at the target vehicle,a simulation model of the vehicle thermal management system composed of a drive system,battery temperature control system and occupant cabin is built in AMESim environment.The characteristics of the vehicle thermal management system under different ambient temperatures and operating conditions are analyzed.In cold conditions in winter,positive temperature coefficient(PTC)electrical heater and motor waste heat are used to heat the cabin together,which can reduce the use time of PTC electrical heater in crew cabin.The state of charge(SOC)consumption can be reduced by 0.20%~3.98%in different working cycles,and the vehicle temperature control strategy is effective and feasible.