WO2005028711A1 - Joint d'etancheite pour pile electrochimique - Google Patents

Joint d'etancheite pour pile electrochimique Download PDF

Info

Publication number
WO2005028711A1
WO2005028711A1 PCT/CA2004/001720 CA2004001720W WO2005028711A1 WO 2005028711 A1 WO2005028711 A1 WO 2005028711A1 CA 2004001720 W CA2004001720 W CA 2004001720W WO 2005028711 A1 WO2005028711 A1 WO 2005028711A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow field
sealing portion
aperture
seal member
sealing
Prior art date
Application number
PCT/CA2004/001720
Other languages
English (en)
Inventor
David Frank
Nathaniel Ian Joos
Original Assignee
Hydrogenics Corporation
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 Hydrogenics Corporation filed Critical Hydrogenics Corporation
Publication of WO2005028711A1 publication Critical patent/WO2005028711A1/fr

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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0276—Sealing means characterised by their form
    • 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
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
    • 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

Definitions

  • the invention relates to a gasket seal member for an electrochemical cell. More particular, the invention relates to an improved structural design for a gasket seal member for an electrochemical cell for prolonging the lifetime of the gasket seal member. Background of the invention
  • Fuel cells and electrolyzer cells are generally referred to as electrochemical cells. Fuel cells have been proposed as a clean, efficient and environmentally friendly source of power which can be utilized for various applications.
  • a fuel cell is an electrochemical device that produces an electromotive force by bringing the fuel (typically hydrogen) and an oxidant (typically air) into contact with two suitable electrodes and an electrolyte which may be a proton exchange membrane.
  • a fuel such as hydrogen gas, for example, is introduced at a first electrode, i.e. anode, where it reacts electrochemically in the presence of the electrolyte to produce electrons and cations. The electrons are conducted from the anode to a second electrode, i.e.
  • an oxidant such as oxygen gas or air is introduced to the cathode where the oxidant reacts electrochemically in the presence of the electrolyte and catalyst, producing anions and consuming the electrons circulated through the electrical circuit; the cations are consumed at the second electrode.
  • the anions formed at the second electrode or cathode react with the cations to form a reaction product.
  • the anode may alternatively be referred to as a fuel or oxidizing electrode, and the cathode may alternatively be referred to as an oxidant or reducing electrode.
  • the half-cell reactions at the two electrodes are, respectively, as follows: H 2 ⁇ 2H + + 2e (1) 1/2O 2 + 2H + + 2e " ⁇ H 2 O (2) [0004]
  • the external electrical circuit withdraws electrical current and thus receives electrical power from the fuel cell.
  • the overall fuel cell reaction produces electrical energy as shown by the sum of the separate half-cell reactions 1 and 2. Water and heat are typical by-products of the reaction. Accordingly, the use of fuel cells in power generation offers potential environmental benefits compared with power generation from combustion of fossil fuels or by nuclear activity. Some examples of applications are distributed residential power generation and automotive power systems to reduce emission levels.
  • an electrolyzer uses electricity to electrolyze water to generate oxygen from its anode and hydrogen from its cathode.
  • a typical solid polymer water electrolyzer (SPWE) or proton exchange membrane (PEM) electrolyzer is also comprised of an anode, a cathode and a PEM disposed between the two electrodes.
  • Water is introduced to, for example, the anode of the electrolyzer which is connected to the positive pole of a suitable direct current voltage.
  • the protons then migrate from the anode to the cathode through the membrane.
  • fuel cells or electrolyzer cells are not operated as single units. Rather, fuel cells or electrolyzer cells are connected in series, stacked one on top of the other, or placed side by side.
  • a series of electrochemical cells referred to as an electrochemical cell stack, is normally enclosed in a housing. Piping and various instruments are externally connected to the electrochemical cell stack for directing and controlling the fluid streams in the system. The stack, housing, and associated hardware make up the electrochemical cell unit.
  • the electrochemical cell stack is completed by two end plates provided on either end of the stack.
  • pressure is applied to the ends of the stack and hence, the end plates. Pressure can be applied using a certain clamping mechanism.
  • seals are required between each pair of adjacent elements in the electrochemical cell stack.
  • the seals may be provided by preformed gaskets made from resilient materials that are compatible with the operational environment of the electrochemical cell.
  • the seals may also be provided by injecting a sealant material into the appropriate electrochemical cell elements and curing the sealant material inside the corresponding electrochemical cells.
  • seals are usually customized according to the configuration of elements, such as flow field plates, terminal plates, end plates, membrane electrode assemblies (MEA), etc.
  • Electrochemical cell elements usually have various ports, slots and channels, making the seal configuration very sophisticated. Such configurations tend to increase local stress within the seal member itself, which leads to rupture, shorter lifetime, and hence leakage of fluids from the electrochemical cell stack. This reduces the efficiency of the electrochemical cell stack, produces an unsafe operation environment and leads to the eventual shut down of the electrochemical cell stack. Therefore, it would be beneficial to have a seal member for an electrochemical cell element that has an improved stress distribution and hence a longer lifetime.
  • At least one embodiment of the invention provides a seal member for sealing portions of a cell element of an electrochemical cell, the cell element including at least one aperture and a region corresponding to a flow field of a flow field plate.
  • the seal member comprises at least one aperture sealing portion corresponding to the at least one aperture of the cell element; and, a flow field sealing portion connected to the at least one aperture sealing portion for partially sealing off the region.
  • the connection is made at a joint portion, the width of the joint region being substantially similar to the width of at least one of the at least one aperture sealing portion and the flow field sealing portion.
  • At least one embodiment of the invention provides an electrochemical cell comprising a plurality of separate elements including a flow field plate having a flow field having at least two apertures; and, a seal member between the flow field plate and another of the plurality of separate elements.
  • the seal member includes at least two aperture sealing portions corresponding to the at least two apertures of the flow field plate; and, a flow field sealing portion connected to the at least two aperture sealing portions for partially sealing off the flow field.
  • the connections are made at joint portions having a width being substantially similar to the width of at least one of the at least two aperture sealing portions and the flow field sealing portion.
  • At least one embodiment of the invention provides a seal member for sealing portions of a cell element of an electrochemical cell, the cell element including at least one aperture and a region corresponding to a flow field of a flow field plate.
  • the seal member comprises at least one aperture sealing portion corresponding to the at least one aperture of the cell element; and, a flow field sealing portion connected to the at least one aperture sealing portion for partially sealing off the region.
  • the connection being made at a joint portion having substantially straight edges and being V-shaped.
  • Figure 1 illustrates an exploded perspective view of an electrolyzer cell unit located within an electrolyzer cell stack
  • Figure 2 illustrates a plan view of an exemplary embodiment of a conventional seal gasket member placed on a circular flow field plate
  • Figure 3 illustrates a plan view of a seal gasket member in accordance with the invention
  • Figure 4 illustrates a plan view of the seal gasket member of Figure 3 placed on the flow field plate of Figure 2
  • Figure 5a illustrates pressure distribution for a portion of the conventional seal gasket member of Figure 2
  • Figure 5b illustrates pressure distribution for a similar portion of the seal gasket member of Figure 3.
  • the invention relates to a seal for electrochemical cells.
  • PEM electrolyzer cell stack As an example. It is to be understood that the invention has applications not limited to PEM electrolyzer cell stacks, but rather any electrochemical cells, including any types of fuel cell stacks and other types of electrolyzer cell stacks.
  • FIG. 1 shown therein is an exploded perspective view of a single electrolyzer cell unit 100 located within an electrolyzer cell stack 101 according to the invention. It is to be understood that while a single electrolyzer cell unit 100 is detailed below, in known manner, the electrolyzer cell stack 101 will usually comprise a plurality of electrolyzer cells stacked together. In some cases, several electrolyzer cell stacks 101 may be connected to one another.
  • the exemplary electrolyzer cell unit 100 comprises an anode flow field plate 120, a cathode flow field plate 130, and a membrane electrode assembly (MEA) 124 disposed between the anode and cathode flow field plates 120, 130.
  • Each flow field plate 120, 130 has an inlet region, an outlet region, and open-faced flow field channels to fluidly connect the inlet region to the outlet region, and provide a way for distributing the product fluids (i.e. gases).
  • the inlet and outlet regions of each plate are also referred to as manifold areas.
  • the MEA 124 comprises a solid electrolyte (i.e.
  • a proton exchange membrane 125 disposed between an anode catalyst layer (not shown) and a cathode catalyst layer (not shown).
  • a first gas diffusion layer (GDL) 122 is disposed between the anode catalyst layer and the anode flow field plate 120, and a second GDL 126 is disposed between the cathode catalyst layer and the cathode flow field plate 130.
  • the GDLs 122, 126 facilitate the diffusion of the product gases from the catalyst surfaces of the MEA 124 to the flow fields of the flow field plates 120, 130.
  • the GDLs 122, 126 enhance the electrical conductivity between each of the anode and cathode flow field plates 120, 130 and the MEA 124.
  • Metal screens or meshes are also used for this purpose.
  • a first current collector plate 116 abuts against the rear face of the anode flow field plate 120.
  • a second current collector plate 118 abuts against the rear face of the cathode flow field plate 130.
  • First and second insulator plates 112, 114 are located immediately adjacent the first and second current collector plates 116, 118, respectively.
  • First and second end plates 102, 104 are located immediately adjacent the first and second insulator plates 112, 114, respectively.
  • sealing means are usually provided between each pair of adjacent plates. Pressure may be applied on the end plates 102, 104 to press the electrochemical cell stack 101 together.
  • a plurality of tie rods 131 may be used to hold the electrochemical cell stack 101 together.
  • the tie rods 131 are screwed into threaded bores in the anode endplate 102, and pass through corresponding plain bores in the cathode endplate 104.
  • fastening means such as nuts, bolts, washers and the like are provided for clamping together the electrolyzer cell stack 101.
  • the endplate 104 is provided with a plurality of connection ports for various fluids.
  • the second endplate 104 has a water connection port 106, an oxygen connection port 107, first and second coolant connection ports 108, 109, and first and second hydrogen connection ports 110, 111.
  • the MEA 124, the anode and cathode flow field plates 120, 130, the first and second current collector plates 116, 118, the first and second insulator plates 112, 114, and the first and/or second end plates 102, 104 have three inlets near one end and three outlets near the opposite end thereof, which are in alignment to form fluid ducts for water/oxygen, coolant, and hydrogen. Also, it is not essential that all of the outlets be located at one end, i.e., pairs of flows could be counter current as opposed to flowing in the same direction.
  • the various ports 106 - 111 are fluidly connected to ducts that extend along the length of the electrolyzer cell stack 101.
  • the flow field plates 120, 130 are substantially rectangular in shape. However, it can be appreciated that the flow field plates 120, 130 can be any shape.
  • FIG 2 shown therein is a plan view of an exemplary embodiment of a conventional seal gasket member 300 (shown with cross-hatches) placed on a circular flow field plate 200.
  • the flow field plate 200 is provided with a plurality of apertures 210, 220, 230, 240, 250 and 260 for various process fluids, such as water, product hydrogen, product oxygen, and coolant. In the case of a fuel cell, these apertures are for reactant fluids, e.g. hydrogen, and air, as well as for a coolant fluid.
  • reactant fluids e.g. hydrogen, and air
  • the plurality of apertures 210, 220, 230, 240, 250 and 260 are provided around the peripheral region of the flow field plate 200.
  • the flow field plate 200 is provided with a groove 270 for accommodating the seal gasket member 300.
  • a flow field 280 is provided in the central region of the flow field plate 200, comprising a plurality of open-faced channels fluidly connecting the apertures 210 and 240 with one another.
  • the apertures 210 and 240 may be the inlet and outlet apertures for a process fluid, e.g. water or coolant, or a product gas.
  • the seal gasket member 300 has a plurality of full aperture sealing portions 320a-320d, each of which completely encloses the apertures 220, 230, 250 and 260, respectively, and hence fluidly insulates these apertures with respect to the flow field 280.
  • the seal gasket member 30O also has partial aperture sealing portions 330a and 330b for sealing off a portion of the apertures 210 and 240 respectively that is not immediately adjacent to the flow field 280.
  • the seal gasket member 300 also includes a flow field sealing portion 340 that substantially encloses the flow field 280. Accordingly, the seal gasket member 300 encloses the apertures 210, 240 and the flow field 280 to enable fluid communication between these elements as well as fluidly isolating these elements from the remaining apertures 220, 230, 250 and 260.
  • Two of the aperture sealing portions 320a-320d, 330a and 330b of the sealing member 300 that are adjacent to one another form a joint portion.
  • An example of a joint portion 390 is shown for full aperture sealing portion 320c and partial aperture sealing portion 330b.
  • the aperture sealing portions 320a -320d, 330a and 330b and the flow field sealing portion 340 have substantially uniform width.
  • the joint portion 290 was designed with a rounded edge 395.
  • the rounded edge 395 increases the amount of material at the joint portion 290 relative to the adjacent portions of the flow field sealing portion 340 and the aperture sealing portions 320c and 330b.
  • the inventors have found th at this local variation in the amount of material is typically quite considerable, relatively speaking, to the width of the gasket seal member 300 and that the variation in width increases the stress in the joint portion 390. This in turn increases the risk of rupture of the seal gasket member 300 and subsequent leakage of the electrolyzer cell element 200.
  • FIG. 3 shown therein is a plan view of a seal gasket member 400 in accordance with the invention.
  • the seal gasket member 400 has a configuration similar to that of seal gasket member 300.
  • the seal gasket member 400 also has a plurality of full aperture sealing portions 420a-420d, partial aperture sealing portions 430a and 430b and a flow field sealing portion 440.
  • the aperture sealing portions 420a-420d, 430a and 430b and the flow field sealing portion 440 preferably have substantially uniform width.
  • FIG. 4 shown therein is a plan view of the seal gasket member 400 placed on the circular flow field plate 20O.
  • the seal gasket member 400 is placed in the groove 270 of the flow field plate
  • the seal gasket member 400 seals the flow field 280 and various apertures 210 to 260 in same manner as seal gasket member 30O. However, one difference is in the joints made between the adjacent aperture sealing portions 420a-420d, 430a and 430b and the flow field sealing portion 440.
  • the full aperture sealing portion 420a and the flow field sealing portion 440 form a joint portion 490.
  • the joint portion 490 has a width 495 that is not substantially different than the widths of the full aperture sealing portion 420a and the flow field sealing portion 440.
  • the joint portion 490 also has substantially straight edges and a V-shaped inner edge or sharp inner edge 496 when compared to the rounded edge 395 of the joint portion 390.
  • the joint portion 490 also has reduced material compared to the joint portion 390. The reduction in material provides the seal gasket member 400 with a decrease in the local variation of the amount of seal material which leads to less stress occurring at the joint portion 490, contrary to the conventional seal gasket member 300 as well as conventional understanding. Accordingly, the inventors found that the amount of seal material in a certain location of the seal gasket member 300 is important since too much material leads to more located stress.
  • FIG. 5a shown therein is an illustration of pressure distribution for a portion of the conventional seal gasket member 300.
  • This pressure information was generated by using commercially available compression paper such as that available from FUJI.
  • An electrochemical cell stack was built with the components discussed above except that the MEAs were replaced with compression paper.
  • the resultant compression in the electrochemical cell stack left a qualitative mark on the compression paper that provides an indication of the pressure distribution experienced by the seal gasket member.
  • the portion of the gasket seal member 300 shown in Figure 5a corresponds to the region surrounding the joint portion 390.
  • FIG. 5a shows that the pressure is unevenly distributed for the seal gasket member 300.
  • the pressure is considerably higher than along the outer ring of the seal gasket member 300 (i.e. full seal aperture portion 320c and partial seal aperture portion 330b for the portion shown).
  • the outer ring of the seal gasket member 300 is subjected to significantly lower pressure as shown by the very light shading in this region. Consequently, the stress is unevenly distributed along the seal gasket member 300 and leakage occurs in areas where the compression pressure is low.
  • Figure 5b shown therein is an illustration of pressure distribution for a similar portion of the seal gasket member 400.
  • This portion of the seal gasket member 400 corresponds to the joint portion 490 in between the full aperture sealing portion 420d and the partial aperture sealing portion 430b.
  • the pressure that is applied to the seal gasket member 400 is substantially uniformly distributed along the joint portion 490 as well as the outer portions of the seal gasket member 400 (i.e. the full aperture sealing portion 420d and the partial aperture sealing portion 430b). This results in good sealing, less stress concentrated regions and consequently a longer lifetime.
  • the seal gasket member 400 may be made from fluoro-silicone material by making a die cut on a sheet of this material. Fluoro-silicone is advantageous if the seal gasket member 400 is used in an electrolyzer and the like. Several other types of material may also be used to construct the seal gasket member 400. Typically the thickness of the seal gasket member 400 varies from 0.025" on the active side of a flow field plate to 0.035 to 0.038" on the passive side of a flow field plate. However the thickness of the seal gasket member 400 may also vary with thinner GDM. It is also preferable that the seal gasket member 400 has a uniform thickness. The seal gasket member 400 is suitable for high pressure applications. In fact, for some cases, the inventors have also found that it is beneficial to maintain the seal gasket member 400 under 20% compression.
  • the seal gasket member 400 can not only be used to provide a seal between flow field plates, but may also be used to provide a seal between other elements of the electrochemical cell unit 100 or the electrochemical cell stack 101 .
  • the gasket seal member 400 may be used to provide a seal between a flow field plate and a terminal plate, between a flow field plate and a GDL, or between a GDL and an MEA.
  • the flow field sealing portion of the gasket encloses areas of these elements corresponding to the flow fields of the flow field plates.
  • the seal gasket member may only include a flow field sealing portion and full aperture sealing portions. Therefore, the term "flow field" should be construed accordingly.
  • the term electrochemical cell is also used to collectively refer to a single electrochemical cell, or an electrochemical cell stack which may comprise a single electrochemical cell or multiple electrochemical cells, together with other elements, i.e. end plates, terminal plates.
  • the end plate, as well as the other components in the electrochemical cell stack may be rectangular, oval or another shape.
  • the shape of the connection ports may vary.
  • the number and position of various openings and connection ports may vary.
  • the actual configuration of the seal gasket member 400 may vary in response to the configuration of the elements in the electrochemical cell or electrochemical cell stack. It should be understood that the invention is also applicable to other types of electrochemical cells, such as fuel cells.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Fuel Cell (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

L'invention porte sur un élément d'étanchéité permettant de sceller hermétiquement des parties d'un élément de pile électrochimique. L'élément de pile comporte au moins une ouverture et une région correspondant à un champ de propagation d'une plaque. L'élément d'étanchéité comporte au moins une partie fermant hermétiquement l'orifice correspondant à l'ouverture de l'élément de pile, et une partie fermant hermétiquement le champ de propagation raccordée à la partie fermant hermétiquement l'orifice de manière à sceller partiellement la région. Le raccordement est effectué au niveau d'une partie de joint dont la longueur est sensiblement similaire à celle d'au moins une ouverture de la partie fermant hermétiquement l'orifice et de la partie fermant hermétiquement le champ de propagation.
PCT/CA2004/001720 2003-09-22 2004-09-21 Joint d'etancheite pour pile electrochimique WO2005028711A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50422203P 2003-09-22 2003-09-22
US60/504,222 2003-09-22

Publications (1)

Publication Number Publication Date
WO2005028711A1 true WO2005028711A1 (fr) 2005-03-31

Family

ID=34375461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2004/001720 WO2005028711A1 (fr) 2003-09-22 2004-09-21 Joint d'etancheite pour pile electrochimique

Country Status (1)

Country Link
WO (1) WO2005028711A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815750A (en) * 1988-06-08 1989-03-28 Nihon Metal Gasket Kabushiki Kaisha Metallic gasket with sealing beads
US5170927A (en) * 1990-12-20 1992-12-15 Ishikawa Gasket Co., Ltd. Metal plate with intersecting beads
US5516124A (en) * 1992-06-30 1996-05-14 Nippon Gasket Co., Ltd. Metal gasket
US6371489B1 (en) * 1998-02-05 2002-04-16 Federal Mogul Sealing Systems Cylinder-head gasket for internal combustion engine
CA2442067A1 (fr) * 2001-03-09 2002-09-19 Nok Corporation Joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815750A (en) * 1988-06-08 1989-03-28 Nihon Metal Gasket Kabushiki Kaisha Metallic gasket with sealing beads
US5170927A (en) * 1990-12-20 1992-12-15 Ishikawa Gasket Co., Ltd. Metal plate with intersecting beads
US5516124A (en) * 1992-06-30 1996-05-14 Nippon Gasket Co., Ltd. Metal gasket
US6371489B1 (en) * 1998-02-05 2002-04-16 Federal Mogul Sealing Systems Cylinder-head gasket for internal combustion engine
CA2442067A1 (fr) * 2001-03-09 2002-09-19 Nok Corporation Joint

Similar Documents

Publication Publication Date Title
US6174616B1 (en) Fuel cell assembly unit for promoting fluid service and design flexibility
US6261711B1 (en) Sealing system for fuel cells
CA2390616C (fr) Pile a combustible
US6410179B1 (en) Fluid flow plate having a bridge piece
EP1070361B1 (fr) Ensemble pile a combustible du type a membrane d'echange de protons dote de sous-empilages de pile a combustible paralleles multiples utilisant des ensembles de plaques d'ecoulement de fluide partages et des ensembles d'electrodes a membrane partages
US8865362B2 (en) Gaskets and bipolar plates for PEM fuel cells
US20050115825A1 (en) Electrolyzer cell arrangement
US7759014B2 (en) Fuel cell having a seal member
US7432008B2 (en) Gas diffusion layer for an electrochemical cell
US10396332B2 (en) Bus bar assembly for an electrochemical cell stack
US6649293B1 (en) Heatable end plate, fuel cell assembly, and method for operating a fuel cell assembly
CA2500680A1 (fr) Assemblages de piles a combustible a ensembles membrane-electrodes de polarites alternantes
US10547064B2 (en) Tunnel cross section for more uniformed contact pressure distribution on metal bead seal at the intersection between bead and tunnel
US20070202383A1 (en) Balanced hydrogen feed for a fuel cell
US7820335B2 (en) Plate for a fuel cell assembly
CN108091900B (zh) 利用凸缘近邻处的压制压纹减少压力变化
US8227136B2 (en) Using ionomer to militate against membrane buckling in the tenting region
CA2390573C (fr) Separateur pour pile a combustible
US7592088B2 (en) Seal configuration for fuel cell stack
US20070154770A1 (en) End plate for an electrochemical cell stack
US7569303B2 (en) Membrane electrode assembly with modified catalyst layout
WO2005028711A1 (fr) Joint d'etancheite pour pile electrochimique
JP2007234315A (ja) 燃料電池
JP2001126743A (ja) 高分子電解質型燃料電池
CN116949474A (zh) 一种水电解制氢单电池及电堆

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GM HR HU ID IL IN IS JP KE KG KP KZ LC LK LR LS LT LU LV MA MD MK MN MW MX MZ NA NI NO NZ PG PH PL PT RO RU SC SD SE SG SK SY TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SZ TZ UG ZM ZW AM AZ BY KG MD RU TJ TM AT BE BG CH CY DE DK EE ES FI FR GB GR HU IE IT MC NL PL PT RO SE SI SK TR BF CF CG CI CM GA GN GQ GW ML MR SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase