中文摘要：

针对增程式纯电动汽车的结构，为了提高燃油效率保证燃油经济性、限制充放电电流、延长电池使用寿命，提出了一种基于自校正变结构模糊的增程器控制策略。综合考虑电池电量SOC及其变化率、驱动电机功率需求，通过模糊控制调整增程器的输出功率进行能量分配。首先根据SOC值与驱动电机功率需求设计多输入单输出模糊控制器，输出量为增程器的功率；其次根据SOC值将电池状态分为充电模式与放电模式，对不同模式制定不同的模糊控制规则，进行模糊控制器的变结构设计；再次根据SOC值的变化率进行自校正设计，通过限制SOC变化率实现对电池充放电电流的限制，达到对电池的保护功能；最后通过Cruise仿真软件和台架测试对该控制策略进行仿真验证，结果表明燃油经济性以及电池寿命均得到有效提升。

英文摘要：

In this paper, a control strategy of range extender electric vehicle is proposed in order to improve fuel efficiency, limit charging and discharging current, and extend battery life. The output power of range extender is distributed with fuzzy control algorithm by power batteries SOC, change rate of SOC and the power demand of driving motor. Firstly, a multi-input single-output fuzzy controller is designed, which input are SOC and power demand of driving motor, and output is output power of range extender. Secondly, the battery state is divided into charging state and discharging state depending on the SOC, and based on the battery state the variable structure method is proposed with different control rules. Thirdly, a self-adaptive method is proposed depending on the change rate of SOC, then the charge and discharge current is limited by limiting the change rate of SOC to achieve the battery protection. Finally, Simulation resuits with Cruise and bench test show that this strategy improved fuel efficiency and battery life efficiently.