| 摘要 |
A method for early diagnosing a fuel cell stack according to an embodiment of the present invention includes the steps of applying, to a fuel cell stack, a synthesized AC obtained by synthesizing first and second frequencies different from each other; analyzing the synthesized AC to detect a higher frequency between the first frequency and the second frequency; measuring one cycle of the higher frequency between the first frequency and the second frequency; and early diagnosing whether failure occurs in the fuel cell stack using the higher frequency between the first frequency and the second frequency, at a point of time at which the one cycle of the higher frequency is measured. |
