关键词: 纯电动汽车；热泵空调系统；采暖性能

Abstract: The energy consumption of heating device seriously affects the driving range of battery electric vehicle. In order to solve the problem of high heating energy consumption, the heat pump air-conditioning system with high thermal efficiency gradually replaces positive temperature coefficient (PTC) material as the heating device of battery electric vehicle. Basing on vehicle level, the heating effect and power consumption of the two systems under different temperature conditions are tested through the comparative test research, and the replacement effect of the heat pump air-conditioning system is analyzed in this paper. The experimental result shows that the heating effect of heat pump air-conditioning system is close to that of PTC and the energy consumption is significantly reduced under the condition of high temperature; the heating effect of heat pump airconditioning system is weaker than that of PTC, and the energy saving effect is reduced compared to PTC under the condition of low temperature. The experimental results will provide some reference for the selection and improvement of heat pump air-conditioning.

Key words: Battery electric vehicle; Heat pump air-conditioning system; Heating performance