Abstract: To improve the economy of the electric vehicle, a efficiency optimization optimal control strategy was developed. The efficiency optimization control strategy is to obtain the relationship among battery efficiency, charge-discharge power and SOC through multiple linear regression. The battery efficiency diagram is divided into several parts according to SOC interval, so that the design equation of efficiency curve can better adapt to the efficiency diagram. The forward simulation model of electric vehicle is established by Matlab/Simulink, and verified by cwtvc driving cycle. The experimental results show that, compared with the map based method, the actual efficiency points of the battery using the efficiency optimization control strategy are distributed in a higher efficiency range, and the driving range can reach 300 km, and the monthly running distance can be increased by 360 km.

Key words: Electric vehicle; Efficiency optimization control strategy; Multiple linear regression; Driving range

摘要： 为了提高纯电动汽车的经济性，在构建纯电动汽车模型的基础上，制定效率优化控制策略。效率优化控制 策略是通过多元线性回归得到动力电池效率、充放电功率和 SOC 三者的关系，将动力电池效率图根据 SOC 区间分 为多个部分，使效率曲线的设计方程更好地适应效率图。首先通过 Matlab/Simulink 建立纯电动汽车前向仿真模型， 采用 CWTVC 工况进行验证。实验结果显示，相比基于 map 的方法，采用效率优化控制策略的动力电池实际效率 点分布在更高的效率区间，续驶里程可达 300 km，每月可多跑 360 km。

关键词: 纯电动汽车；效率优化；多元线性回归；续驶里程