Fuel cell stack

Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Grouping of fuel cells into stack or module

Reexamination Certificate

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Details

C429S457000, C429S452000, C429S514000

Reexamination Certificate

active

07867665

ABSTRACT:
Corrosion of a metal portion such as a pipe connected to a fuel cell stack is suppressed. The fuel cell stack has a plurality of single cells which generate electrical power using an aqueous methanol solution and air and are stacked in a vertical direction. An inlet of a fuel supply manifold for distributing the aqueous methanol solution to each cell and an outlet of a fuel discharge manifold for collecting the fuel discharged from the single cells are provided in a common conductive end plate. Hence, when the discharge fuel discharged from the fuel cell stack is circulated and resupplied to the stack, the potential of the discharged fuel becomes equal to that of the liquid fuel to be supplied to the stack, whereby the corrosion of the metal portion such as a pipe, a tank, a pump, or a heat exchanger is suppressed.

REFERENCES:
patent: 6329093 (2001-12-01), Ohara et al.
patent: 2006/0166053 (2006-07-01), Badding et al.
patent: 1245982 (2000-03-01), None
patent: 2000-067901 (2000-03-01), None
patent: 2001-110439 (2001-04-01), None
patent: 2004-047211 (2004-02-01), None
patent: 2005-005196 (2005-01-01), None
patent: 2005-108850 (2005-04-01), None
patent: 2005-141935 (2005-06-01), None
Chinese Office Action, with English translation thereof, issued in Patent Application No. 200710005104.1 dated on Jul. 4, 2008.
Japanese Notification of Reasons for Refusal, with English Translation, issued in Japanese Patent Application No. JP 2006-054020, mailed on Oct. 6, 2009.

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