SOLID POLYMER FUEL CELL STACK AND METHOD FOR OPERATING THE SAME, AND AIR VENT VALVE

WIPO Patent Application WO/2001/075996

A1

A fuel cell stack comprises membrane electrode complexes (3) in which gas diffusion electrodes (2a, 2b) are arranged on both sides of a solid polymer membrane (1) and a reactant gas supply separators (5) interposed between the membrane electrode complexes (3). The reactant gas supply separators (5) each have a first surface having a fuel gas supply groove (9a) for supplying a fuel gas, a second surface having an oxidizer gas supply groove (9b) for supplying an oxidizer gas, and a water supplying means for supplying water to the fuel gas supply groove (9a). The water supply means has a water supply groove (15) for introducing water from a water supply manifold (14) disposed on the second surface, communication holes (16) for communication of the second surface with the first surface, and a buffer section (17) having a porous body (20) for uniformly distributing water from the water supply groove (15) to the communication holes (16). The porous body (20) extends over the second surface. The water flows in the porous body (20) along the second surface. Therefore water can be supplied uniformly to the fuel gas supply grooves (9a) of the reactant gas supply separator (5).

OGAMI YASUJI (JP)
OOMA ATSUSHI (JP)
HORI MICHIO (JP)

PCT/JP2001/002630

October 11, 2001

March 29, 2001

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TOSHIBA KK (JP)
OGAMI YASUJI (JP)
OOMA ATSUSHI (JP)
HORI MICHIO (JP)

F16K24/04; H01M8/02; H01M8/04; H01M8/10; H01M8/24; (IPC1-7): H01M8/04; F16K24/00

WO1998052242A1

1998-11-19

JPH07220746A	1995-08-18
JPH09139222A	1997-05-27
US5234776A	1993-08-10
JPH01146263A	1989-06-08
JP2000173634A	2000-06-23

Inomata, Yoshiaki c/o Toyo International Patent Office TG115 Building (6th Floor 1-15-7 Toranomon Minato-ku, Tokyo, JP)

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