Battery/UC hybridization for electric vehicles via a novel double input DC/DC power converter

In this work, for electric vehicles (EVs), a novel double input DC-DC power converter, that enables utilization of a battery and ultra-capacitor (UC) in parallel while increasing the overall performance of electric vehicles and recovering regenerative breaking energy, is introduced. Since UCs have higher power density when compared to batteries, by the use of a UC as a power input, DC bus voltage regulation at transients and peak loads is achieved easily, thus the life of the battery and efficiency of the system are increased. The average value model of the proposed converter is created in MATLAB^®, Simulink^® and SimPowerSystems^® environment, then its dynamic performance is tested under the load determined from the ECE-15 drive cycle.