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Method and apparatus for fuel cell protection

  • US 6,646,418 B1
  • Filed: 07/24/2002
  • Issued: 11/11/2003
  • Est. Priority Date: 07/24/2002
  • Status: Active Grant
First Claim
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1. A fuel cell system, comprising:

  • a plurality of fuel cells connected in series;

    a voltage monitor for monitoring an individual voltage of each cell;

    a precision voltage reference to which each individual cell voltage is compared to a preset level;

    a load operatively coupled to the plurality of fuel cells; and

    a load switch coupled between the plurality of fuel cells and the load, the load switch disconnecting the load from the system when the voltage of any cell falls below the preset level and for reconnecting the load when the cell voltage rises above the preset level.

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