Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for control of operation
Reexamination Certificate
2011-01-04
2011-01-04
Ryan, Patrick (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Process or means for control of operation
C429S431000, C429S432000, C324S500000
Reexamination Certificate
active
07862944
ABSTRACT:
An isolation fault detection system for detecting isolation faults in a fuel cell system associated with a fuel cell hybrid vehicle. The isolation fault detection system measures a stack voltage potential, a positive fuel cell voltage potential, a negative fuel cell voltage potential, a positive battery voltage potential, and an overall battery voltage potential. The isolation fault detection system then uses these voltage potentials in mesh equations to compare the measured voltage potentials to voltage potentials that would occur during a loss of isolation. In one embodiment, the isolation fault detection system uses these five measured voltage potentials to determine whether an isolation fault has occurred at four separate locations in the fuel cell hybrid vehicle. The system also can detect the location of the isolation fault.
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Doenitz Steffen
Hinz Hartmut
GM Global Technology Operations Inc.
Miller John A.
Miller IP Group, PLC
Ryan Patrick
Yanchuk Stephen
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