HYBRID ELECTRIC PROPULSION SYSTEM, HYBRID ELECTRIC POWER PACK AND METHOD OF OPTIMIZING DUTY CYCLE

摘要

A fuel cell powered vehicle includes a fuel cell power module having at least one fuel cell electrically connected to a drive unit for delivering power to the drive unit, a battery pack having at least one battery electrically connected to the drive unit for independently delivering power to the drive unit, and an ultra-capacitor pack having at least one ultra-capacitor electrically connected to the drive unit for independently delivering power to the drive unit. When the power requirement is low, only the fuel cell power module delivers electric power to the drive unit. The battery pack supplements the power to the drive unit for medium power requirements. The ultra-capacitor pack supplements the power to the drive unit for high power requirements. The ultra-capacitor pack can be recharged by regenerative braking.