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1. WO2000041260 - FUEL CELL FLUID FLOW FIELD PLATE AND METHODS OF MAKING FUEL CELL FLOW FIELD PLATES

Publication Number WO/2000/041260
Publication Date 13.07.2000
International Application No. PCT/CA1999/001214
International Filing Date 21.12.1999
Chapter 2 Demand Filed 27.07.2000
IPC
H01M 8/02 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
H01M 8/24 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
24Grouping of fuel cells, e.g. stacking of fuel cells
CPC
H01M 2300/0082
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2300Electrolytes
0017Non-aqueous electrolytes
0065Solid electrolytes
0082Organic polymers
H01M 8/0213
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0204Non-porous and characterised by the material
0213Gas-impermeable carbon-containing materials
H01M 8/0226
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0204Non-porous and characterised by the material
0223Composites
0226in the form of mixtures
H01M 8/0247
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0247characterised by the form
H01M 8/026
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0258characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
026characterised by grooves, e.g. their pitch or depth
H01M 8/0267
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0267having heating or cooling means, e.g. heaters or coolant flow channels
Applicants
  • BALLARD POWER SYSTEMS INC. [CA/CA]; 9000 Glenlyon Parkway Burnaby, British Columbia V5J 5J9, CA (AllExceptUS)
  • GIBB, Peter, R. [CA/CA]; CA (UsOnly)
Inventors
  • GIBB, Peter, R.; CA
Agents
  • DE KOCK, Elbie, R.; Russell Reyneke Two Bentall Centre Suite 700 555 Burrard Street Vancouver, British Columbia V7X 1M8, CA
Priority Data
09/223,35630.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FUEL CELL FLUID FLOW FIELD PLATE AND METHODS OF MAKING FUEL CELL FLOW FIELD PLATES
(FR) PLAQUE A CHAMPS D'ECOULEMENT DE FLUIDE, POUR CELLULE ELECTROCHIMIQUE, ET PROCEDE DE FABRICATION DE PLAQUES A CHAMP D'ECOULEMENT DE FLUIDE, POUR CELLULES ELECTROCHIMIQUES
Abstract
(EN)
An electrically conductive, fuel cell fluid flow field plate comprises a first major surface, a second major surface disposed opposite said first major surface, and a plurality of parallel substantially straight channels formed in at least one of the first and second major surfaces. The channels are separated by lands, and at least one of the plurality of channels has an open width less than about 0.75 millimeter. The channels preferably have a length to cross sectional area ratio of between about 2180:1 to about 6200:1. When the fluid flow field plate is used in a fuel cell operating at a current density higher than about 500 mA/cm2, the pressure differential between the inlets and outlets of the oxidant flow field channels is between about 138 millibars and about 400 millibars. Such fluid flow field plates may be formed by embossing or molding.
(FR)
Une plaque à champs d'écoulement de fluide, électroconductrice, pour cellule électrochimique, comprend une première surface principale, une deuxième surface principale placée à l'opposé de ladite première surface principale, et plusieurs canaux parallèles sensiblement rectilignes formés dans au moins une des première et deuxième surfaces principales. Les canaux sont séparés par des plages, et au moins un des canaux présente une largeur ouverte de moins d'environ 0,75 millimètres. Lesdits canaux présentent, de préférence, un rapport longueur/section d'environ 2180:1 à environ 6200:1. Lorsque la plaque à champs d'écoulement de fluide est utilisée dans une cellule électrochimique fonctionnant à une densité de courant supérieure à environ 500 mA/cm2, le différentiel de pression entre les entrées et les sorties des canaux à champ d'écoulement d'oxydant est compris entre environ 138 millibar et environ 400 millibar. Lesdites plaques à champs d'écoulement de fluide peuvent être formées par moulage ou par emboutissage.
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