Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for producing – recycling – or treating...
Reexamination Certificate
2011-07-12
2011-07-12
Yuan, Dah-Wei (Department: 1727)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Process or means for producing, recycling, or treating...
C429S427000, C429S400000, C429S433000
Reexamination Certificate
active
07976991
ABSTRACT:
A model uses various operating characteristics of a fuel cell to predict the relative humidity profile that is occurring within the fuel cell as a function of the reaction progress. The model is used to predict the relative humidity profile that will occur in response to changes to one or more of the operating characteristics of the fuel cell. A high frequency resistance of the fuel cell can also be used as a measure that is indicative of the humidity within the fuel cell. The model and/or the high frequency resistance can be used in a closed-loop feedback system to control the operation of the fuel cell to maintain the humidification of the MEA and fuel cells within a desired range to achieve a desired fuel cell performance.
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Fagley John C.
Goebel Steven G.
Pettit William H.
Whitehead Lee C.
GM Global Technology Operations LLC
Harness & Dickey & Pierce P.L.C.
Martin Angela J.
Yuan Dah-Wei
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