ANN ARBOR, Mich. -- Fuel-cell vehicle developers usually say they are building electric vehicles that draw power from hydrogen, not a battery.
But not always.
At the EcoCAR competition ride and drive here, two groups of engineering students displayed fuel-cell plug-in hybrids. The vehicles carry both a fuel cell stack and a battery.
It's one of the new-tech systems developed by 16 college teams in the three-year competition, sponsored mainly by the U.S. Department of Energy and General Motors, which donated vehicles. The vehicles were shown at the EPA's National Vehicle and Fuel Emissions Laboratory here.
The teams have devised a range of alternative powertrains to meet the California Air Resources Board's zero-emissions vehicle regulations. The vehicles include ethanol- and biodiesel-powered hybrids and range-extended EVs.