FUEL CELL INTERNAL STATE DETECTION SYSTEM AND STATE DETECTION METHOD
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Abstract
A fuel cell internal state detection system includes estimation object state quantity setting unit for setting a suitable estimation object state quantity as an index of an internal state, an impedance value acquisition unit configured to obtain an impedance value of a fuel cell, an impedance usability judging unit configured to judge whether or not the obtained impedance value is usable for the calculation of the estimation object state quantity, estimation object state quantity calculation unit for calculating the estimation object state quantity set by the estimation object state quantity setting unit on the basis of the obtained impedance value when the impedance value is judged to be usable for the calculation of the estimation object state quantity by the impedance usability judging unit, and an unusable-scene process execution unit configured to perform an unusable-scene process when the impedance value is judged not to be usable for the calculation of the estimation object state quantity by the impedance usability judging unit.
8 Citations
23 Claims
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1-12. -12. (canceled)
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13. A fuel cell internal state detection system for detecting an internal state of a fuel cell on the basis of an impedance value of the fuel cell, comprising:
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an estimation object state quantity setting unit configured to set an estimation object state quantity as an index of the internal state; an impedance value acquisition unit configured to obtain the impedance value of the fuel cell; an impedance usability judging unit configured to judge whether or not the obtained impedance value is usable for a calculation of the estimation object state quantity; an estimation object state quantity calculation unit configured to calculate the estimation object state quantity set by the estimation object state quantity setting unit on the basis of the obtained impedance value when the impedance value is judged to be usable for the calculation of the estimation object state quantity by the impedance usability judging unit; and an unusable-scene process execution unit configured to perform an unusable-scene process when the impedance value is judged not to be usable for the calculation of the estimation object state quantity by the impedance usability judging unit, the impedance value acquisition unit obtaining impedance values based on three or more frequencies, the impedance usability judging unit determining whether at least one of three or more obtained impedance values belongs to an arc region or to a non-arc region in an impedance curve on a complex plane and judging whether or not the impedance value is usable according to the determination result. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A fuel cell internal state detection method for detecting an internal state of a fuel cell on the basis of an impedance value of the fuel cell, comprising:
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an estimation object state quantity setting step of setting a suitable estimation object state quantity as an index of the internal state; an impedance value acquisition step of obtaining the impedance value of the fuel cell; an impedance usability judging step of judging whether or not the obtained impedance value is usable for the calculation of the estimation object state quantity; an estimation object state quantity calculation step of calculating the estimation object state quantity set in the estimation object state quantity setting step on the basis of the obtained impedance value when the impedance value is judged to be usable for the calculation of the estimation object state quantity in the impedance usability judging step; and an unusable-scene process execution step of performing an unusable-scene process when the impedance value is judged not to be usable for the calculation of the estimation object state quantity in the impedance usability judging step, impedance values based on three or more frequencies being obtained in the impedance value acquisition step, whether at least one of three or more obtained impedance values belongs to an arc region or to a non-arc region in an impedance curve on a complex plane being determined and whether or not the impedance value is usable being judged according to the determination result in the impedance usability judging step.
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Specification