Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-10-23
2007-10-23
Cantelmo, Gregg (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000
Reexamination Certificate
active
10629586
ABSTRACT:
A plurality of individual fuel cells are connected in series with each other to construct the fuel cell. The fuel cell is diagnosed on the basis of an average output voltage Va of the individual cells, their standard deviation σ, individual output voltages, their variances σ2of vibration components and their voltage drop speed of their non-vibration components. For example, if Va is within a normal range and moreover at least one of the individual output voltages is not within a normal range, it is diagnosed that water blocks the fuel electrode. If Va is not within a normal range and moreover σ is within a normal range, it is diagnosed that the electrolyte film is dried. Further, if Va is not within a normal range and moreover σ is not within a normal range, it is diagnosed that the fuel (hydrogen) supply is insufficient.
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Imamura Tomonori
Izuhara Hideshi
Kawai Toshiyuki
Osaki Akimasa
Cantelmo Gregg
Denso Corporation
Oliff & Berridg,e PLC
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