COMPARISON OF ENERGY CONSUMPTION AND RECOVERY OF HYDROGEN POWERED ELECTRIC VEHICLES WITH DIFFERENT POWER TRANSMISSION SYSTEMS

Nowadays, the shifting to electric vehicles in automotive industry is increasing rapidly, and the design of high-energy efficient vehicle architectures has gained importance. The energy consumption and recovery values to be obtained with different vehicle architectures vary depending on the structure of this power unit. In this study, the energy consumption of hydrogen electric vehicles equipped with different power transmission systems and regeneration with the help of regenerative braking were investigated and compared with the mathematical model for different architectures. Firstly, the power calculation was made for the two different driving cycles of the electric vehicle, and the current values which were drawn from the same electric motor and braking were calculated for the wheel, single stage and two-step gear situations. According to the calculated current values, fuel cell hydrogen consumption and supercapacitor charge status of all power architectures were determined. According to the results obtained, the lowest hydrogen consumption are obtained in two-stage gears, single-stage gears, and in-wheel motor conditions, respectively. However, the best charging state is obtained in the reverse order. Finally, energy consumptions and recoveries are compared for different road slopes, and results were obtained reflecting the same order