The current energy crisis and climate change are driving the development of alternative solutions to reduce greenhouse gas emissions. The transport sector consumes a large amount of fossil fuels and is responsible for 24% of global carbon dioxide emissions, so car manufacturers and researchers have turned their attention to new electric fossil-fuel-free powertrains in recent decades. Fuel cell hybrid electric vehicles (FCHEVs) are gradually reaching maturity; they consist of a fuel cell and an energy storage system (ESS), usually represented by a battery, to meet the dynamic power required by the electric motor to run the vehicle. Their versatility in design based on modular structure and hydrogen storage, high efficiency and high energy density make this technology very promising for the transition to clean energy.