为了满足电动汽车的动力性和经济性指标,分别对电池、电机和传动比进行了计算与选择,得到了该车的动力传动匹配结果,建立了电动汽车的仿真模型。仿真结果表明,所选用的匹配参数很好地满足了性能要求。最后,说明了影响电动汽车的各项性能的因素,着重分析了传动比对其动力性和经济性的影响,指出了传动比的选取原则。 In order to meet the dynamic and economic indicators of EV, the battery, motor and transmission ratio were calculated and selected respectively, and the matching result of the power transmission of the vehicle was obtained. The simulation model of EV was established. The simulation results show that the chosen matching parameters satisfy the performance requirements well. Finally, the factors that affect the performance of electric vehicle are described. The influence of transmission ratio on its dynamic and economic performance is analyzed emphatically. The selection principle of transmission ratio is pointed out.