Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-09-04
2007-09-04
Crepeau, Jonathan (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000
Reexamination Certificate
active
10265025
ABSTRACT:
The invention provides fuel cell systems and methods of operation where a fuel cell system is used as a backup power supply in a cold environment where the system must be maintained at a suitable temperature to allow the fuel cell to operate when needed. In one embodiment, the invention provides a thermal protection system for a fuel cell backup power generator. An enclosure houses a fuel cell and a coolant circuit. The coolant circuit is coupled to the fuel cell. A temperature sensor is provided that is adapted to indicate a system temperature. A heater is provided to increase the system temperature when actuated. For example, the heater can be an electric resistive heater or a burner coupled to a combustible fuel supply such as a propane tank. The heater can be located in the interior of the enclosure, in the coolant circuit, etc. A control circuit is provided that is adapted to actuate the heater when the system temperature is below a predetermined threshold.
REFERENCES:
patent: 6797421 (2004-09-01), Assarabowski et al.
patent: 2003/0039873 (2003-02-01), Condit et al.
Crepeau Jonathan
Plug Power Inc.
Trop Pruner & Hu P.C.
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