考虑电动空调能耗的纯电动汽车动力传动系统参数匹配

在考虑电动空调对电动汽车整车性能影响的基础上,对一款两挡变速纯电动汽车动力传动系统包括蓄电池、驱动电机和变速器参数进行了匹配设计。基于所选部件综合效率模型,制定了经济性换挡策略,并以循环工况能耗最小为目标对初选速比进行优化。仿真结果表明:匹配参数不但兼顾了整车质量不至过重而且又确保动力性和续驶里程符合设计要求,在初选速比基础上的速比优化使得续驶里程在关闭空调时延长5.28%,开启空调时延长4.29%。

Powertrain parameter design for the electric vehicle with taking the energy consumption of air conditioner into consideration

On the basis of considering the influence of air conditioner on vehicle performance,the parameter determination of the power train composed of a battery,a traction motor and a two-speed transmission of an electric car is carried out. To ensure the economy of operation,a shifting strategy with a principle which emphasizes the high work efficiency of the power train is drawn up and the gear ratios are corrected aiming at the least energy cost over the drive cycle. The simulation results indicate that the designed parameters meet the requirements moderately and the driving range is extended by 5.28% when the air conditioner is turned off and 4.29% when turned on,compared with the initial results through the correction of the gear ratios.