| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell status diagnostic device which can diagnose the status of a fuel cell without causing an increase in the number of components.SOLUTION: The fuel cell status diagnostic device comprises an AC current application unit 51 which applies an AC current having a predetermined waveform to a fuel cell 1, a local current detection unit 4 which detects a local current flowing to a local part of a unit cell 10 to be diagnosed, an operation unit 521 which extracts the AC component from a local current and calculates the frequency characteristics in the AC component, and status diagnosis means 62 which diagnoses the status of the fuel cell based on the correspondence of the frequency characteristics in the AC component and the frequency characteristics in the local current. Since cell voltage detection means for detecting the cell voltage of the unit cell 10 is not required, the status of the fuel cell 1 can be diagnosed without causing an increase in the number of components. |
