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Systems and methods for detecting ultracapacitor cell short circuits

  • US 9,037,424 B2
  • Filed: 05/01/2012
  • Issued: 05/19/2015
  • Est. Priority Date: 05/01/2012
  • Status: Active Grant
First Claim
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1. A computer-implemented method for detecting a short-circuited ultracapacitor cell on a machine, the method comprising:

  • performing, by one or more processors, cell balancing among a plurality of ultracapacitor cells arranged within a plurality of ultracapacitor modules, each ultracapacitor module including at least two ultracapacitor cells connected in series;

    measuring, by the one or more processors, a module voltage generated by each of the plurality of ultracapacitor modules after performing the cell balancing and prior to applying a load of the machine to the ultracapacitor modules; and

    determining, by the one or more processors, that an ultracapacitor cell among the plurality of ultracapacitor cells is short-circuited when a module unbalanced voltage exceeds a threshold voltage, the module unbalanced voltage being equal to a difference between a maximum module voltage and a minimum module voltage determined from among the measured module voltages.

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