A Comparative Study of Fuel Cell Electric Vehicle Hybridization with Battery or Supercapacitor

Paper i proceeding, 2018

This paper deals with the conception and the
achievement of a hybrid power source using a fuel cell combined
with a battery or a supercapacitor. In which, the fuel cell supplies
the main power to the drive system; while the battery or the supercapacitor is used as an auxiliary power source. This gives the
benefit that the regenerative energy is stored in battery or supercapacitor during the deceleration and it is transferred back to the
drive system during the acceleration when compared to electric
vehicles solely powered by a fuel cell. Different energy storage
devices, such as fuel cell, battery, and supercapacitor are compared, and then several structures of fuel cell-based electric vehicles are analyzed in the paper. Following that a conventional
topology based on fuel cell and battery using a DC/DC converter
with the connection between the fuel cell and the inverter, and a
floating voltage topology powered by fuel cell and supercapacitor
without any DC/DC converters are chosen for the simulation
analysis. Simulation results show that power variations of the
fuel cell in floating voltage topology can be smoother, and its rated power is downsized, which can extend the fuel cell lifetime and
take full advantages of the fuel cell and the supercapacitor.