电动汽车动力传动系统参数设计及动力性仿真

Parameter Design for the Power Train and Simulation of the Dynamic Performance of Elctrical Vehicle

对电动汽车动力传动系统参数设计的原则和方法进行了探讨 ,并以SC710 1轿车为研究对象 ,对电动汽车动力传动系统的参数进行合理选择。以铅酸电池作为动力源 ,提出了荷电状态SOC的计算方法 ,分析了铅酸电池的电动势E0 、内阻R0 、极化电阻Rr 随荷电状态SOC变化的关系 ,并根据铅酸蓄电池容量与温度的关系 ,对铅酸蓄电池的容量进行了温度补偿 ,为设计和改进电池能量管理系统的性能奠定了理论基础。建立了动力传动系统的动力学模型 ,在此基础上对基于SC710 1的电动轿车的动力性能进行了计算机仿真试验 ,进一步分析了影响电动汽车续驶里程的 ,并提出了增加行驶里程的措施。仿真结果表明 ,对铅酸蓄电池电特性的分析和建立的动力学模型是正确的 。

The method and principle of the parameter design for the power train of EV is explored and discussed,then the parametersof EV. based on SC7101 are reasonably selected.The method of calculating the SOC of Lead_acid battery is provided and the relation among the electromotive force,the interior resistance, the polarized resistance and the SOC are analyzed. The capacity is compensated according to the relation between the capacity and the temperature, which is the basis on which the energy management system is designed and improved. The dynamic model which reflects the dynamic characteristics of the power train is established,then the dynamic performance of the EV based on SC7101 is simulated, and the factors that affect the continuous mileage of EV are analyzed,the measures to increase the continuous mileage are provided.The result shows that the analysis of the electric characteristics of battery and the dynamic model are correct,and the dynamic performance perfectly meets the need of the design target.