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Fuel cell for downhole power systems

  • US 6,686,079 B2
  • Filed: 05/14/2001
  • Issued: 02/03/2004
  • Est. Priority Date: 05/17/2000
  • Status: Active Grant
First Claim
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1. A fuel cell, comprising:

  • a fuel vessel that comprises a source of fuel;

    an oxidant vessel comprising a source of oxidant;

    a reaction zone that comprises at least one cathode, at least one anode, and electrolyte between each anode and cathode;

    a closed water vessel that is connected to the reaction zone by at least one capillary flow path;

    a fuel conduit that connects the fuel vessel and the reaction zone, and comprises a fuel pressure control apparatus adapted to maintain a static pressure of fuel in the reaction zone;

    an oxidant conduit that connects the oxidant vessel and the reaction zone, and comprises an oxidant pressure control apparatus adapted to maintain a static pressure of oxidant in the reaction zone; and

    electrical conductors connected to anode and cathode and adapted to conduct electricity to an external device.

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