Humidity control method including AC impedance measurement for fuel cell and a fuel cell system

A method of controlling humidification of a fuel cell includes the steps of measuring impedance of the fuel cell, and adjusting humidification quantity of the fuel cell based on an imaginary axis value Xi and a real axis value Xr on a complex number plane of the measured impedance after the measurem...

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Bibliographische Detailangaben
Hauptverfasser: Hibino Kiyohide, Iwasawa Chikara
Format: Patent
Sprache:eng
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Zusammenfassung:A method of controlling humidification of a fuel cell includes the steps of measuring impedance of the fuel cell, and adjusting humidification quantity of the fuel cell based on an imaginary axis value Xi and a real axis value Xr on a complex number plane of the measured impedance after the measurement step. In the measurement step, impedance is measured based on supply of alternating current having one frequency of 10 Hz or less during power generation of the fuel cell.