STATE DETECTION DEVICE AND METHOD FOR FUEL CELL
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Abstract
A state detection device for fuel cell includes a supposed high-frequency impedance value setting unit configured to set a supposed high-frequency impedance value on the basis of an impedance measurement value belonging to an arc region of an impedance curve of the fuel cell, an actually measured high-frequency impedance value calculation unit configured to obtain an actually measured high-frequency impedance value on the basis of an impedance measurement value belonging to a non-arc region of the impedance curve of the fuel cell, and an ionomer resistance estimation unit configured to estimate a value obtained by subtracting the actually measured high-frequency impedance value from the supposed high-frequency impedance value as an ionomer resistance value. The supposed high-frequency impedance value setting unit sets a value of an intersection of an equivalent circuit impedance curve set on the basis of the impedance measurement value belonging to the arc region and a real ads as the supposed high-frequency impedance value.
7 Citations
36 Claims
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1-18. -18. (canceled)
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19. A state detection device for fuel cell, comprising:
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a supposed high-frequency impedance value setting unit configured to set a supposed high-frequency impedance value on the basis of an impedance measurement value belonging to an arc region of an impedance curve of the fuel cell; an actually measured high-frequency impedance value calculation unit configured to obtain an actually measured high-frequency impedance value on the basis of an impedance measurement value belonging to a non-arc region of the impedance curve of the fuel cell; and an ionomer resistance estimation unit configured to estimate a value obtained by subtracting the actually measured high-frequency impedance value from the supposed high-frequency impedance value as an ionomer resistance value; the supposed high-frequency impedance value setting unit setting a value of an intersection of an equivalent circuit impedance curve set on the basis of an impedance measurement value belonging to the arc region and a real axis as the supposed high-frequency impedance value. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A state detection method for fuel cell, comprising:
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a supposed high-frequency impedance value setting step of setting a supposed high-frequency impedance value on the basis of an impedance measurement value belonging to an arc region of an impedance curve of the fuel cell; an actually measured high-frequency impedance value calculation step of obtaining an actually measured high-frequency impedance value on the basis of an impedance measurement value belonging to a non-arc region of the impedance curve of the fuel cell; and an ionomer resistance estimation step of estimating a value obtained by subtracting the actually measured high-frequency impedance value from the supposed high-frequency impedance value as an ionomer resistance value; a value of an intersection of an equivalent circuit impedance curve set on the basis of an impedance measurement value belonging to the arc region and a real axis being set as the supposed high-frequency impedance value in the supposed high-frequency impedance value setting step.
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Specification