“…11.028 0306-2619/Ó 2014 Elsevier Ltd. All rights reserved. powertrains [9][10][11], in which the engine is responsible for extending the traveling mileage and the motor/generator compensates the rest power; this enables energy recovery and properly distributes energy [12]. Types of battery/supercapacitors [13], fuel cell/ supercapacitors [14], fuel cell/batteries [15], and fuel cell/battery/ supercapacitors [16] used as hybrid energy sources in (hybrid) EVs have been studied.…”