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State diagnostic apparatus of fuel cell stack

  • US 10,106,051 B2
  • Filed: 12/07/2014
  • Issued: 10/23/2018
  • Est. Priority Date: 09/26/2014
  • Status: Active Grant
First Claim
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1. An apparatus for diagnosing a state of a fuel cell stack, comprising:

  • a driver configured to turn on and off a power transistor based on a driving frequency;

    the power transistor driven based on a control of the driver to such that a rectangular wave current component of a single frequency is included in a current of the fuel cell stack; and

    a diagnostic controller configured to set the driving frequency,and the diagnostic controller further programmed to measure a voltage of the fuel cell stack, and convert the voltage into a frequency to detect even multiple harmonic components of a rectangular wave frequency, and diagnose a state of the fuel cell stack based on a magnitude of the detected even multiple harmonic components.

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