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Adaptive purge control to prevent electrode redox cycles in fuel cell systems

  • US 20080075985A1
  • Filed: 09/21/2006
  • Published: 03/27/2008
  • Est. Priority Date: 09/21/2006
  • Status: Active Grant
First Claim
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1. A method of operating a fuel cell system during a fuel outage or shortage, comprising:

  • detecting an open circuit voltage (OCV) of the fuel cell system; and

    providing a reducing purge gas flow to anode electrodes of fuel cells of the fuel cell system when the OCV approaches, reaches or falls below a threshold value below which oxidation of the anode electrodes occurs.

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