CA2490421A1 - Flow field plate geometries - Google Patents

Flow field plate geometries Download PDF

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Publication number
CA2490421A1
CA2490421A1 CA002490421A CA2490421A CA2490421A1 CA 2490421 A1 CA2490421 A1 CA 2490421A1 CA 002490421 A CA002490421 A CA 002490421A CA 2490421 A CA2490421 A CA 2490421A CA 2490421 A1 CA2490421 A1 CA 2490421A1
Authority
CA
Canada
Prior art keywords
flow field
field plate
permeable wall
channels
gas diffusion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002490421A
Other languages
French (fr)
Other versions
CA2490421C (en
Inventor
Mark Christopher Turpin
Alan Robert Chapman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Morgan Crucible Co PLC
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2490421A1 publication Critical patent/CA2490421A1/en
Application granted granted Critical
Publication of CA2490421C publication Critical patent/CA2490421C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8605—Porous electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/96—Carbon-based electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

A flow field plate for a fuel cell or electrolyser comprises on at least one face an assembly of channels comprising one or more gas delivery channels, o ne or more gas removal channels, and a permeable wall separating same. The permeable wall may comprise a plurality of gas diffusion channels.

Claims (20)

1. A flow field plate (separator) for a fuel cell or electrolyser comprising on at least one face an assembly of channels comprising one or more gas delivery channels, one or more gas removal channels, and a permeable wall separating same.
2. A flow field plate as claimed in Claim 1, in which the permeable wall comprises a plurality of gas diffusion channels.
3. A flow field plate as claimed in Claim 2, in which no part of the permeable wall is more than 1.25mm from a gas diffusion channel.
4. A flow field plate as claimed in either of Claims 2 or 3, in which the permeable wall comprises impermeable material.
5. A flow field plate as claimed in any one of Claims 1 to 4, in which the permeable wall is of convoluted form.
6. A flow field plate as claimed in Claim 5, in which the permeable wall is concertinaed, having wall segments extending along each fold of the wall, and end wall segments at each turn of the wall.
7. A flow field plate as claimed in either of Claim 5 or 6, in which the permeable wall is convoluted on two or more scales.
8. A flow field plate as claimed in Claim 6 or 7, in which the maximum distance from any part of the land area of the flow field to the nearest gas delivery or gas diffusion channel is less than 1.25mm.
9. A flow field plate as claimed in any one of Claims 6 to 8, in which the maximum distance from any part of the land area of wall segments extending along each fold of the wall to the nearest gas delivery or gas diffusion channel is less than 0.5mm.
10. A flow field plate as claimed in any one of Claims 1 to 9, in which the maximum distance from any part of the land area of the flow field to the nearest gas delivery or gas diffusion channel is less than 0.25mm
11. A flow field plate as claimed in any one of Claims 1 to 10, in which the permeable wall has a length of 10 or more times the maximum width of the flow field.
12. A flow field plate as claimed in any one of Claims 1 to 11, in which the corners of the flow field segments are rounded.
13. A flow field plate as claimed in any one of Claims 1 to 12, in which the permeability of the permeable wall varies along its length so as to provide a more even distribution of gas than using a constant permeability permeable wall.
14. A flow field plate as claimed in Claim 13, in which the permeable wall comprises gas diffusion channels and the width and/or depth of these channels varies along the length of the permeable wall.
15. A flow field plate as claimed in either Claim 13 or 14, in which the permeable wall comprises gas diffusion channels, and the number of gas diffusion channels per unit length varies along the length of the permeable wall.
16. A flow field plate as claimed in any one of Claims 13 to 15, in which the permeable wall comprises gas diffusion channels, and some or all of the gas diffusion channels are convoluted to provide a tortuous path.
17. A flow field plate as claimed in Claim 16, in which the proportion of the convoluted gas diffusion channels is varied along the length of the permeable wall.
18. A flow field plate as claimed in either Claim 16 or 17, in which the degree of convolution the convoluted gas diffusion channels is varied along the length of the permeable wall.
19. A flow field plate, as claimed in any preceding claim, in which the permeable walls is defined by an array of lands forming a network of fine gas diffusion channels therebetween.
20. A method of making a flow field plates as claimed in any one of Claims 1 to 19, by applying a patterned resist having different width channels to a plate and exposing the plate and resist to sandblasting with a fine grit, to produce a pattern of channels of different widths and depths in the flow field plate.
CA2490421A 2002-06-24 2003-06-18 Flow field plate geometries Expired - Fee Related CA2490421C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0214522.5 2002-06-24
GB0214522A GB2387476B (en) 2002-06-24 2002-06-24 Flow field plate geometries
PCT/GB2003/002621 WO2004001874A2 (en) 2002-06-24 2003-06-18 Flow field plate geometries

Publications (2)

Publication Number Publication Date
CA2490421A1 true CA2490421A1 (en) 2003-12-31
CA2490421C CA2490421C (en) 2011-09-27

Family

ID=9939158

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2490421A Expired - Fee Related CA2490421C (en) 2002-06-24 2003-06-18 Flow field plate geometries

Country Status (12)

Country Link
US (1) US7838139B2 (en)
EP (1) EP1516383B1 (en)
JP (1) JP2005531113A (en)
KR (1) KR101019922B1 (en)
CN (1) CN100334765C (en)
AT (1) ATE418165T1 (en)
AU (1) AU2003236904A1 (en)
CA (1) CA2490421C (en)
DE (1) DE60325360D1 (en)
GB (1) GB2387476B (en)
TW (1) TW200410440A (en)
WO (1) WO2004001874A2 (en)

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Also Published As

Publication number Publication date
AU2003236904A1 (en) 2004-01-06
DE60325360D1 (en) 2009-01-29
WO2004001874A2 (en) 2003-12-31
KR101019922B1 (en) 2011-03-08
AU2003236904A8 (en) 2004-01-06
GB0214522D0 (en) 2002-08-07
GB2387476B (en) 2004-03-17
JP2005531113A (en) 2005-10-13
ATE418165T1 (en) 2009-01-15
TW200410440A (en) 2004-06-16
GB2387476A (en) 2003-10-15
EP1516383A2 (en) 2005-03-23
US7838139B2 (en) 2010-11-23
CN1663067A (en) 2005-08-31
CA2490421C (en) 2011-09-27
KR20050019760A (en) 2005-03-03
EP1516383B1 (en) 2008-12-17
US20050221152A1 (en) 2005-10-06
CN100334765C (en) 2007-08-29
WO2004001874A3 (en) 2004-03-11

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