Abstract
This manuscript focuses on a novel actively controlled
hybrid magnetic battery/ultracapacitor based energy storage
system (ESS) for vehicular propulsion systems. A stand-alone battery
system might not be sufficient to satisfy peak power demand
and transient load variations in hybrid and plug-in hybrid electric
vehicles (HEV, PHEV). Active battery/ultracapacitor hybrid ESS
provides a better solution in terms of efficient power management
and control flexibility. Moreover, the voltage of the battery pack
can be selected to be different than that of the ultracapacitor,
which will result in flexibility of design as well as cost and size
reduction of the battery pack. In addition, the ultracapacitor bank
can supply or recapture a large burst of power and it can be used
with high C-rates. Hence, the battery is not subjected to supply
peak and sharp power variations, and the stress on the battery will
be reduced and the battery lifetime would be increased. Utilizing
ultracapacitor results in effective capturing of the braking energy,
especially in sudden braking conditions.
