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Online Low Performing Cell (LPC) Prediction and Detection of Fuel Cell System

  • US 20090197155A1
  • Filed: 02/06/2008
  • Published: 08/06/2009
  • 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:

  • 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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