Electricity: battery or capacitor charging or discharging – Wind – solar – thermal – or fuel-cell source
Reexamination Certificate
2005-01-25
2005-01-25
Tibbits, Pia (Department: 2838)
Electricity: battery or capacitor charging or discharging
Wind, solar, thermal, or fuel-cell source
Reexamination Certificate
active
06847188
ABSTRACT:
A control method for monitoring a fuel cell stack in a fuel cell system in which the actual voltage and actual current from the fuel cell stack are monitored. A preestablished relationship between voltage and current over the operating range of the fuel cell is established. A variance value between the actual measured voltage and the expected voltage magnitude for a given actual measured current is calculated and compared with a predetermined allowable variance. An output is generated if the calculated variance value exceeds the predetermined variance. The predetermined voltage-current for the fuel cell is symbolized as a polarization curve at given operating conditions of the fuel cell. Other polarization curves may be generated and used for fuel cell stack monitoring based on different operating pressures, temperatures, hydrogen quantities.
REFERENCES:
patent: 4128700 (1978-12-01), Sederquist
patent: 4293315 (1981-10-01), Sederquist
patent: 4555454 (1985-11-01), Shuster
patent: 4642272 (1987-02-01), Sederquist
patent: 4650727 (1987-03-01), Vanderborgh et al.
patent: 4659634 (1987-04-01), Struthers
patent: 4670359 (1987-06-01), Beshty et al.
patent: 4678723 (1987-07-01), Wertheim
patent: 4816353 (1989-03-01), Wertheim et al.
patent: 4904548 (1990-02-01), Tajima
patent: 4923768 (1990-05-01), Kaneko et al.
patent: 4988283 (1991-01-01), Nagasawa et al.
patent: 4994331 (1991-02-01), Cohen
patent: 5248567 (1993-09-01), Amemiya et al.
patent: 5271916 (1993-12-01), Vanderborgh et al.
patent: 5272017 (1993-12-01), Swathirajan et al.
patent: 5316871 (1994-05-01), Swathirajan et al.
patent: 5334463 (1994-08-01), Tajima et al.
patent: 5372617 (1994-12-01), Kerrebrock et al.
patent: 5429886 (1995-07-01), Struthers
patent: 5484577 (1996-01-01), Buswell et al.
patent: 5484666 (1996-01-01), Gibb et al.
patent: 5518705 (1996-05-01), Buswell et al.
patent: 5518828 (1996-05-01), Senetar
patent: 5554453 (1996-09-01), Steinfeld et al.
patent: 5605770 (1997-02-01), Andreoli et al.
patent: 5631532 (1997-05-01), Azuma et al.
patent: 5637415 (1997-06-01), Meltser
patent: 5702838 (1997-12-01), Yasumoto et al.
patent: 5760488 (1998-06-01), Sonntag
patent: 5763113 (1998-06-01), Meltser et al.
patent: 5789091 (1998-08-01), Wozniczka et al.
patent: 5945229 (1999-08-01), Meltser
patent: 6007930 (1999-12-01), Adams et al.
patent: 6692851 (2004-02-01), Keskula et al.
patent: 19924938 (1999-12-01), None
patent: 0862233 (1998-09-01), None
patent: 0982788 (2000-03-01), None
patent: 04121971 (1978-10-01), None
patent: 6030062 (1985-02-01), None
patent: 60032254 (1985-02-01), None
patent: 2098063 (1990-04-01), None
patent: 4058463 (1992-02-01), None
patent: 7142079 (1995-06-01), None
patent: 81138709 (1996-05-01), None
patent: 9055219 (1997-02-01), None
patent: 2000357526 (2000-12-01), None
M.T. Le et al., “Effects of Operating Parameters on PAFC Stack Performance”, Proceedings of the 23rdIntersociety Energy Conversion Engineering Conference, vol. 2, 1988, pp. 251-255.
Szaniszio, “The Advanced Low-Emissions Catalytic-Combustor Program: Phase 1—Description and Status”, ASME #79-GT-192.
Krill et al., “Catalytic Combustion for System Applications”, ASME #79-HT-54.
Hall et al., “A Porous Media Burner for Reforming Methanol for Fuel Cell Powered Electric Vehicles”, SAE Paper #950095.
European Search Report mailed Jun. 17, 2002.
Clingerman Bruce J.
Doan Tien M.
Keskula Donald H.
Brooks, Esq. Cary W.
Deschere, Esq. Linda M.
General Motors Corporation
Tibbits Pia
LandOfFree
Fuel cell stack monitoring and system control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel cell stack monitoring and system control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel cell stack monitoring and system control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3410278