电动汽车新型混合能源管理系统研究

摘要

电池技术是电动汽车的关键技术之一.目前,蓄电池不支持大电流充放电和能量密度低制约了电动汽车的发展.设计了一种新型混合能源系统--蓄电池与超级电容系统,并针对此系统提出一种全新的控制策略,主要利用超级电容支持大电流充放电的特性,以弥补蓄电池自身的不足.采用再生制动方式回收汽车刹车时的动能,提高车载电能利用率,进一步弥补蓄电池能量密度低的缺陷.Simulink平台搭建的数学仿真模型表明,系统在理论上具有可行性.%Battery technology,which doesn t support high-current charge-discharge processes and is of low energy density,is one of the most critical technologies that basically limit the development of electric vehicle (EV). A new dual energy system-battery and super-capacitor system was designed. A new control strategy, which takes use of the characteristics that super-capacitor supports high-current charge-discharge processes , is adopted to make up for the battery deficiency. Regenerative braking method is employed to take back the braking kinetic energy,improve the efficiency of electric power,and make up for battery deficiency of low energy density. Mathematical simulation model based on Simulink platform demonstrates that the system is theoretically feasible.