Deterioration diagnosis of fuel cell seal member
A fuel cell stack ( 1 ) housed in a case ( 2 ) generates power according to supply of hydrogen gas to a hydrogen gas passage ( 111 ) formed inside the case. The hydrogen gas passage ( 111 ) is sealed by a seal member ( 107 ). The case ( 2 ) is ventilated by a ventilation device ( 7 ). A sensor ( 8 )...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A fuel cell stack ( 1 ) housed in a case ( 2 ) generates power according to supply of hydrogen gas to a hydrogen gas passage ( 111 ) formed inside the case. The hydrogen gas passage ( 111 ) is sealed by a seal member ( 107 ). The case ( 2 ) is ventilated by a ventilation device ( 7 ). A sensor ( 8 ) detects the hydrogen concentration of gas which a ventilation device ( 7 ) discharges from the case ( 2 ). The controller ( 10 ) calculates a variation rate of the hydrogen concentration after supply of hydrogen gas to the hydrogen gas passage ( 111 ) starts (S 2 ), and correctly diagnoses the deterioration state of the seal member ( 107 ) from the variation rate (S 7, S 71, S 72 ). |
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