Method and system for setting diagnosis signal for fuel cell stack

摘要

The present invention relates to a method and a system for configuring a diagnosis signal for a fuel cell stack that can configure a diagnosis signal necessary for diagnosing the malfunction of a fuel cell stack to be able to be used optimally for the hardware specifications of a determined malfunction diagnosis system. The method for configuring a diagnosis signal for a fuel cell stack according to an embodiment of the present invention comprises the following steps: inputting an alternating current signal with the combination of one or two frequencies into a fuel cell stack to be diagnosed; measuring the voltage of the fuel cell stack, which is induced by the input alternating current signal, using a determined number of sampling kinds, and measuring the value of total harmonic distortion (THD) based on the measured voltage of the fuel cell stack and the alternating current signal; repeating the step of inputting the alternating current signal and the step of measuring the value of THD a predetermined number of times; confirming the frequency of the alternating current signal and the sampling number corresponding to the greatest value of THD of the measured values if the repetition has been conducted the predetermined number of times; and configuring the frequency of the alternating current signal and the sampling number corresponding to the greatest value of THD to be the frequency of the alternating current signal for diagnosing a fuel cell stack and the sampling number respectively.