Control Strategy Analysis of Vehicle Thermal Management System Based on Motor Heat Utilization

Abstract

Waste heat recovery can not only reduce the heating energy consumption during heating, but also assist the positive temperature coefficient to improve the heating efficiency. Herein, a motor waste heat recovery system composed of two four-way valves is proposed. Through simulation and test, the thermal management system model is established based on the parameters of each component. Experiments and simulations are also conducted at 0, 20, and 40 °C. Under the New European Driving Cycle, it is verified that the motor waste heat recovery system can meet the heating demand of the cabin. At the same time, the temperature rise of the battery increases by 2.9% from 0 to 15 °C compared to no heat recovery system. From 0 to 18 °C, the cabin temperature increases by 8.1%. The cooling rate of the battery increases by 5.8% from 40 to 30 °C and the cooling rate of the cabin increases by 9.7% from 40 to 23 °C.