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Online low performing cell (LPC) prediction and detection of fuel cell system

  • US 8,088,525 B2
  • Filed: 02/06/2008
  • Issued: 01/03/2012
  • Est. Priority Date: 02/06/2008
  • Status: Active Grant
First Claim
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1. A method for predicting a low performing cell in a fuel cell stack, said method comprising:

  • executing, using at least one computing device coupled to a memory, instructions for;

    estimating a polarization curve of the fuel cell stack using system parameters for both an average cell voltage and a minimum cell voltage;

    determining a low performing cell current density set-point;

    calculating an average cell voltage at the current density set-point;

    calculating a minimum cell voltage at the current density set-point;

    determining a difference voltage between the average cell voltage and the minimum cell voltage; and

    determining whether one or both of the difference voltage is greater than a first predetermined voltage threshold and the minimum cell voltage is less than a second predetermined voltage threshold to determine whether the fuel cell stack includes a low performing cell.

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