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Hybrid propulsion for fuel-cell cars

  • US 6,380,638 B1
  • Filed: 11/16/2000
  • Issued: 04/30/2002
  • Est. Priority Date: 03/11/1998
  • Status: Expired due to Fees
First Claim
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1. A hybrid drive system for a motor vehicle comprising:

  • a fuel cell;

    an energy store;

    a first electric traction motor, an auxiliary electrical load;

    a first circuit operable at a first voltage and adapted to selectively supply said first traction motor and said auxiliary electrical load with electrical energy, said first circuit includes a first switching device for selectively connecting said fuel cell and said first traction motor, said first circuit also includes a second switching device for selectively connecting said fuel cell to said auxiliary electrical load;

    said first circuit capable of connecting said fuel cell, said first traction motor, and said auxiliary electrical load, a second circuit operable at a second voltage and adapted to selectively supply said first traction motor and said auxiliary electrical load with electrical energy, said second circuit includes a third switching device for selectively connecting said energy store and said first traction motor, said second circuit also includes a fourth switching device for selectively connecting said energy store to said auxiliary electrical load;

    said second circuit capable of connecting said energy store, said first traction, motor, and said auxiliary electrical load; and

    a device for controlling said first, second, third, and fourth switching devices.

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