Abstract
The high energy density of a fuel cell battery and the peak current capability of a secondary battery are combined in the power plant of an electric car. The four‐seat vehicle weighs 2000 lb and is powered by a 7 kW (20 kW peak) d‐c motor. The 6 kW hydrogen‐air fuel cell battery is connected in parallel with a 4 kWhr lead battery (84V) ; 660 ft3 of hydrogen are stored in six lightweight cylinders (180 lb total weight) equivalent to 33 kWhr of actually available electric energy. The design of the fuel cell battery was aimed at very long life expectancy on intermittent duty, fast automatic starting and shutdown, reliable safety features, and use of available commercial accessories. The operation of the car is not more difficult than driving a conventional auto; the range is over 200 miles. The refilling of the hydrogen cylinders takes only a few minutes from a 2000 psig supply. The acceleration is similar to that of a small car with a combustion engine. Top speed is 55 mph.
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