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

摘要： 采暖装置的能耗对纯电动汽车的续驶里程产生重要影响。为解决采暖高能耗问题，热 效率较高的热泵空调系统逐渐代替正温度系数（PTC）材料作为纯电动汽车的采暖装置。文 章通过基于整车层面的对比试验研究，测试二者在不同温度工况下的采暖效果和功耗，分析 热泵空调系统的代替效果。试验结果表明，在温度较高的工况下，热泵空调系统采暖效果与 PTC 接近并且能耗显著降低；在温度较低的工况下，热泵空调系统的采暖效果弱于 PTC，同 时节能效果对比 PTC 优势缩小。试验结果为热泵空调的选配和改进研究提供一定的参考。

关键词: 纯电动汽车；热泵空调系统；采暖性能