A control strategy scheme for fuel cell-vehicle based on frequency separation

This paper presents a control strategy scheme based on frequency-separation for Fuel cell-Battery Hybrid Electric Vehicle (HEV), using a Fuel cell (FC) as a main energy source, and a battery as an auxiliary power source. First, an analysis of hybrid architecture using an FC and batteries for automotive applications is presented. Next, the model and the control strategy are described. In this strategy a frequency splitter is used for routing the low frequency content of power demand into the FC and its high frequencies into the battery, taking profit from the battery as a peak power unit. Simulation and experimental results validate the performance of this strategy.