Application of a decoupling method based on online filtering technique for multi-source electric vehicles

In this paper, an online filtering technique advantage is presented to improve the decoupling method already used on energy management for electric vehicles and hybrid electric vehicles. The most widely used power sources in electric vehicles and hybrid electric vehicles are batteries, super-capacitors and fuel cells. Several studies have been made on these type of power sources and concludes that its complement is very beneficent for a big variety of applications. Based on this complement between sources, a new scenario on electric vehicles energy storage is being taken seriously, the electric vehicles with hybrid electric storage systems. A multi-source electric vehicles with hybrid electric storage systems as well as the sources frequency distribution used in hybridization concept are presented. The traditional DC-DC decoupling method control and its improvement with the online filtering technique are fully addressed. The two methods are compared using several simulation based on Matlab/Simulink under different load steps. The new technique presents a good behaviour including for unknown loads.