Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2008-01-29
2008-01-29
Cantelmo, Gregg (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S010000, C429S006000
Reexamination Certificate
active
07323268
ABSTRACT:
A power source with miniaturized SOFC fuel cells has: a stack (20) made up of the fuel cells (2), the volume of which is less than 10−3m3; a channel system (24, 25, 26) in which reactants, namely gaseous fuel (50) and also air (40), can be fed to the cells (2) and the fuel that is partially depleted in the cells is subjected to afterburning; a casing (10, 11) and a heat exchanger (6) where supplied air can be heated up with the exhaust gas (60) from the afterburning. The fuel cells contain a disc-shaped solid electrolyte (30) which in addition to ion conducting components also includes electron conducting components which cause an ohmic loss. In this way the quantity ratio of these components is so designed that in an idling operation of the power source a heat flow from the cells to the environment can be compensated by the ohmic loss.
REFERENCES:
patent: 5641585 (1997-06-01), Lessing et al.
patent: 2003/0012994 (2003-01-01), Kushibiki et al.
patent: 2003/0054215 (2003-03-01), Doshi et al.
patent: WO 00/45457 (2000-08-01), None
Cantelmo Gregg
Cerion AG
Townsend and Townsend / and Crew LLP
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