SUMMER/FALL 2003 — Vehicle Systems
PSAT Enhanced with Dual Energy Storage and Ultracapacitor Model
Electrical energy storage is a very important element in hybrid fuel cell vehicles, and different storage technologies are being considered. Until now, batteries have been the technology of choice in hybrid vehicles, but they typically operate in a quite narrow state-of-charge range to primarily provide power for acceleration and absorb regenerative braking energy. The addition of ultracapacitors (because of their high power density) has been explored to reduce the peak power demands on the battery and allow a wider operating range, leading to better utilization.
Under the FreedomCAR and Vehicle Technologies Program, CTR's Powertrain System Analysis Toolkit model (PSAT) has been enhanced with dual energy storage capability and an ultracapacitor model. This capability was used with GCtool-Eng to assess the impact of energy storage technologies (ultracapacitor and battery), as well as hybridization degrees on hybrid fuel cell applications.
Power sharing between batteries and ultracapacitors
Sponsor
U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, FreedomCAR and Vehicle Technologies Program
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