基于超级电容的电动汽车快速充电研究

Research on Fast Charging of Electric Vehicle Based on Supercapacitor

针对电动汽车正负脉冲法快速充电时所出现的负脉冲能量回收中的过电压问题,提出了一种基于超级电容的蓄电池充放电的拓扑结构。在该拓扑结构中,超级电容用于回收正负脉冲充电法中蓄电池放出高能负脉冲,以抑制高能负脉冲对系统产生的冲击。讨论了超级电容器充放电电路工作原理,并基于直流微网下,利用Matlab/Simulink软件搭建了电动汽车蓄电池充放电模型,通过仿真验证了该拓扑结构的可行性,达到了设计目标。

In order to resolve the problem of over-voltage in negative pulse energy recovery when fast charging of electric vehicle by using positive and negative pulse,this paper proposes a novel charging and discharging circuit topology of battery based on supercapacitor.Supercapacitor in the topology is to recover high-energy negative pulse in the positive and negative pulse charging method,so as to restrain the impact of high energy negative pulse on the system.The operating principle is discussed,and the feasibility and superiority of the topology structure are verified by simulation.