混合电动汽车辅助储能系统的研究

Research of auxiliary energy storage system in hybrid electric vehicles

针对混合电动汽车在城市交通中频繁加速减速的特点,设计了基于超级电容储能的电动汽车辅助储能系统,选择两相交错式半桥拓扑双向DC/DC变换器作为超级电容的充放电电路。重点设计双向DC/DC变换器对超级电容的充放电控制,采用平均电流控制的两个电感电流内环和一个电压外环的控制策略,并对电动汽车辅助储能系统进行了Simulink仿真,从而有效验证了超级电容在电动汽车中应用的优势。

Hybrid electric vehicles have the characteristics of frequent acceleration and slowdown in urban traffic.A bi-directional DC-DC converter in the super-capacitor energy system was designed.A topology for bidirectional interleaved DC/DC converter was used in the super-capacitor energy system.The design of control loop of charge mode and discharge mode for the super-capacitor was emphasized,using two inner inductor current loop and one outer voltage loop of average-current-controlled.The auxiliary energy storage system for hybrid electric vehicles was simulated and the advantage of super-capacitor in hybrid electric vehicles could be effectively verified.