WO2019011869A1 - Système d'étanchéité conçu pour un dispositif électrochimique - Google Patents

Système d'étanchéité conçu pour un dispositif électrochimique Download PDF

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Publication number
WO2019011869A1
WO2019011869A1 PCT/EP2018/068563 EP2018068563W WO2019011869A1 WO 2019011869 A1 WO2019011869 A1 WO 2019011869A1 EP 2018068563 W EP2018068563 W EP 2018068563W WO 2019011869 A1 WO2019011869 A1 WO 2019011869A1
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WO
WIPO (PCT)
Prior art keywords
channels
channel
medium
sealing
discharge
Prior art date
Application number
PCT/EP2018/068563
Other languages
German (de)
English (en)
Inventor
Christopher Jung
Peter Stahl
Jürgen KRAFT
André Wiechert
Original Assignee
Elringklinger Ag
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 Elringklinger Ag filed Critical Elringklinger Ag
Publication of WO2019011869A1 publication Critical patent/WO2019011869A1/fr

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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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • 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
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/036—Bipolar electrodes
    • 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
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes
    • 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 present invention relates to a sealing arrangement for sealing between a medium-carrying region of an electrochemical device and an outer region of the medium-carrying region, comprising a sealing element with a sealing longitudinal direction, at least one feed channel, through which medium from the medium-carrying area an inner space of the sealing element can be fed, and at least one Abvantkanal through which medium from the interior of the sealing element can be discharged.
  • the electrochemical device in which such a sealing arrangement is used is designed, for example, as a fuel cell stack or as an electrolyzer and preferably comprises a stack of a plurality of electrochemical units following one another along a stacking direction.
  • electrochemical devices of this kind is one of a medium, such as a fuel gas, an oxidizing agent or a coolant, flowed medium-carrying portion of the electrochemical device against an outer space of the medium-carrying area, which is filled in the operation of the electrochemical device with another fluid medium or a Outside space of the electrochemical device, sealed by a sealing arrangement, which comprises a sealing element which extends in a sealing longitudinal direction around the medium-carrying area to be sealed.
  • a medium such as a fuel gas, an oxidizing agent or a coolant
  • a medium feedthrough comprises, for example, at least one feed channel, through which medium from the medium-conducting region can be fed to an interior of the sealing element of the sealing arrangement, and at least one discharge channel, through which the medium can be discharged from the interior of the sealing element into the further region guiding the same fluid medium.
  • DE 10 2011 118 817 A1 discloses a sealing arrangement for an electrochemical device whose sealing element comprises a bead made of an elastomeric material, which runs transversely over mutually aligned feed channels and discharge channels.
  • the rigidity of a sealing element of the sealing arrangement is increased at the points where the sealing element crosses a feed channel or a discharge channel.
  • the rigidity of the seal member is reduced at the locations where omissions are provided in a bead of the seal member.
  • the known sealing arrangements for electrochemical devices therefore have a non-uniform stiffness distribution along the sealing longitudinal direction of the sealing element, which may result in an inhomogeneous distribution of the sealing forces along the sealing element.
  • the sealing effect of the sealing arrangement can vary greatly from section to section.
  • the present invention has for its object to provide a seal assembly of the type mentioned, which has a very homogeneous stiffness distribution along the sealing element.
  • the respective discharge channel is not aligned in a line with an opposite on the other side of the sealing element the discharge channel feed channel, but is arranged offset from the arranged on the other side of the sealing element feed channels in the seal longitudinal direction.
  • the stiffness distribution of the sealing arrangement in particular in the region of the points at which the discharge channels and the feed channels open into the sealing element, is homogenized in comparison with sealing arrangements in which one discharge channel is aligned with a respective feed channel.
  • the rigidity of the seal assembly can be selectively varied in order to achieve the best possible sealing effect.
  • all discharge channels are arranged offset relative to all feed channels in the seal longitudinal direction.
  • the seal assembly does not include a discharge channel that is aligned with any of the supply channels.
  • the discharge channel or, if there are several discharge channels, the discharge channels is or are preferably in fluid communication with the feed channel or, if several feed channels are present, with at least one of the feed channels, preferably through the interior of the sealing element.
  • all discharge passages of the seal arrangement are in fluid communication with all supply passages of the seal arrangement.
  • the number of discharge channels may be larger or smaller than the number of supply channels.
  • the number of discharge channels is the same size as the number of supply channels.
  • the number of discharge channels and / or the number of supply channels may be, for example, two or more, three or more, four or more, or five or more.
  • the sealing element comprises a bead and that the feed channel or, if more feed channels are present, the feed channels and / or the discharge channel or, if several discharge channels are present, the discharge channels each at a bead flank of the bead of the sealing element open.
  • the feed channels of the seal arrangement have mutually tilted throughflow axes.
  • all feed channels have flow axes aligned parallel to one another.
  • discharge channels of the seal arrangement may in principle have mutually tilted flow axes.
  • all discharge channels have flow axes aligned parallel to one another.
  • a flow-through axis of a channel is to be understood as meaning a straight line which runs through the centroid of a cross-section through the interior of the channel and parallel to a longitudinal direction along which the channel extends.
  • At least one feed channel and / or at least one discharge channel have an in
  • the height H of the sealing element is greater than the height h of the feed channel or, if multiple feed channels are present, the feed channels and / or greater than the height h 'of the discharge channel or, if multiple discharge channels are present, the discharge channels.
  • the height H of the sealing element is to be understood here as its extent along the stacking direction of the electrochemical device.
  • the height h of a feed channel is to be understood to mean its extent along the stacking direction of the electrochemical device.
  • the height h 'of a discharge channel is to be understood as meaning the extent of the discharge channel along the stacking direction of the electrochemical device.
  • the sealing element comprises at least one bead in a Bipolarplattenlage a bipolar plate of the electrochemical device.
  • the bead itself can have a sealing function or carry an elastomer element which extends in the longitudinal direction of the seal and has a sealing function.
  • the sealing element comprises two beads in each case a bipolar plate layer of a bipolar plate of the electrochemical device.
  • the two beads can in particular be designed and arranged substantially mirror-symmetrically to one another.
  • the feed channel or, if several feed channels are provided, the feed channels and / or the discharge channel or, if several discharge channels are provided, the discharge channels each have at least one bead in a bipolar plate layer of a bipolar plate of the electrochemical device include.
  • the two beads which belong to the same feed channel or discharge channel, may preferably be formed and arranged substantially mirror-symmetrically to each other.
  • a particularly homogeneous distribution of stiffness of the sealing arrangement in the longitudinal direction of sealing is achieved when the offset V between one of the discharge channels and the respective nearest feed channel along the sealing longitudinal direction is about half as large as the distance D between the flow axes of two successive in the seal longitudinal direction feed channels and / or is about half as large as the distance D 'between the flow axes of two successive in the seal longitudinal direction Ab classroomkanälen.
  • the medium-carrying region around which the sealing arrangement extends for the purpose of sealing may in particular be a medium channel of the electrochemical device which extends through a plurality of electrochemical units of the electrochemical device along a stacking direction of the electrochemical device.
  • the medium-conducting region which is sealed by the sealing arrangement is a flow field of the electrochemical device, through which a medium from a medium channel can flow transversely to a stacking direction of the electrochemical device from the medium channel to another medium channel.
  • the sealing arrangement according to the invention is particularly suitable for use in an electrochemical device which comprises a stack of a plurality of electrochemical units following one another in a stacking direction and at least one sealing arrangement according to the invention.
  • the fluid medium which is guided in the operation of the electrochemical device in the medium-carrying area and can be supplied to the interior of the sealing element by the at least one feed channel, may in particular be a fuel gas, an oxidizing agent or a coolant.
  • the sealing element comprises two beads which are formed in an anode-side bipolar plate layer or in a cathode-side bipolar plate layer of a bipolar plate of the electrochemical device, the sealing lines of the anode-side bead and the cathode-side bead overlap, preferably essentially completely, in the stacking direction of the electrochemical device ,
  • the beads in the anode-side bipolar plate layer and in the cathode-side Bipolarplattenlage are preferably facing away from each other.
  • a feed channel which lies within a medium channel surrounded by the seal arrangement, is selectively opened or closed at its end facing away from the sealing element.
  • a feed channel which lies within a flow field surrounded by the seal arrangement, is selectively opened or closed at its end facing away from the sealing element.
  • FIG. 1 is a fragmentary schematic plan view of a bipolar plate of an electrochemical unit of a plurality of along a stacking successive electrochemical units comprising electrochemical device in the region of a medium channel and an adjacent flow field, wherein between the medium channel and the flow field, a seal assembly with a sealing element, mediumkanalseiti- gene supply channels and flow field side discharge channels is arranged;
  • FIG. 2 shows a cross section through the sealing element and a feed channel of the seal arrangement of FIG. 1, along the line 2 - 2 in Fig. 1;
  • FIG. 3 is a perspective view of a second embodiment of a sealing arrangement comprising a sealing element, supply channels and discharge channels, each comprising two beads formed in a first bipolar plate layer of the bipolar plate and in a second bipolar plate layer of the bipolar plate, respectively;
  • Fig. 4 is a top plan view of the seal assembly of Fig. 3;
  • FIG. 5 shows a cross section through the seal arrangement of FIGS. 3 and 4, along the line 5 - 5 in Fig. 4th Identical or functionally equivalent elements are denoted by the same reference numerals in all figures.
  • FIGS. 1 and 2 shown in fragmentary form, designated as 100 as an electrochemical device, for example a fuel cell stack or an electrolyzer, comprises a stack comprising a plurality of successive in a stacking direction 102 electrochemical units 104, such as fuel cell units or electrolysis units, and a (not shown) clamping device for applying the electrochemical units 104 with a directed parallel to the stacking direction 102 clamping force.
  • electrochemical units 104 such as fuel cell units or electrolysis units
  • a (not shown) clamping device for applying the electrochemical units 104 with a directed parallel to the stacking direction 102 clamping force.
  • each electrochemical unit 104 of the electrochemical device 100 each comprises a bipolar plate 106.
  • Each bipolar plate 106 in this embodiment comprises a first bipolar plate layer 108 and a second bipolar plate layer 110 which, preferably by material bonding, in particular by welding, for example by
  • a coolant flow field may be formed in a space between the first bipolar plate layer 108 and the second bipolar plate layer 110.
  • the bipolar plate 106 is preferably formed of a metallic material.
  • Each bipolar plate 106 has a plurality of medium passage openings 112, through each of which a fluid medium to be supplied to the electrochemical device 100 (in the case of a fuel cell stack, for example a fuel gas, an oxidant or a coolant) can pass through the bipolar plate 106.
  • the medium passage openings 112 of the successive bipolar plates 106 in the stack and the intermediate spaces lying in the stacking direction 102 between the medium passage openings 112 together form a respective medium channel 114.
  • Such a medium channel 114 is often referred to as a "manifold”.
  • Each medium channel 114 by means of which a fluid medium can be supplied to the electrochemical device 100, is assigned in each case at least one other (not shown) medium channel, through which the respective fluid medium can be discharged from the electrochemical device.
  • the medium from the first medium channel 114 transversely, preferably substantially perpendicular to the stacking direction 102 to the second medium channel.
  • a medium channel 114 for a fuel gas or for an oxidizing agent of the electrochemical device 100 and a flow field 116 for the fuel gas or for the oxidizing agent is shown.
  • a sealing arrangement 118 which comprises a sealing element 120 surrounding the medium channel 114 (see FIGS. 1 and 2).
  • the medium channel 114 forms a medium-carrying region 115 of the electrochemical device 100 which is sealed by the sealing arrangement 118.
  • the sealing element 120 extends along a sealing longitudinal direction 122.
  • the sealing element 120 comprises a bead 124 which is formed in one of the bipolar plate layers 108, 110 of the bipolar plate 106, for example in the first bipolar plate layer 108.
  • the bead 124 may include two bead flanks 126a and 126b and a central portion 128 interconnecting the two bead flanks 126a and 126b.
  • the cross-section of the bead 124 (taken perpendicular to the seal longitudinal direction 122) may, for example, have a substantially trapezoidal shape.
  • the sealing element 120 has a height H, which is composed of the height of the bead 124 in the first bipolar plate layer 108 and the thickness of the second bipolar plate layer 110.
  • the sealing arrangement 118 further comprises one or more feed channels 132, through which the inner space 130 of the sealing element 120 in fluid communication with the medium-carrying area 115 (medium channel 114) is.
  • each feed channel 132 each comprises a bead 134 in one of the bipolar plate layers 108, 110 of the bipolar plate 106, for example in the first bipolar plate layer 108.
  • This bead 134 extends in each case along a bead longitudinal direction 136, which preferably extends transversely, in particular substantially perpendicular, to the sealing longitudinal direction 122.
  • the bead 134 may have a substantially trapezoidal cross-section.
  • the height h of a feed channel 132 is composed of the height of the bead 134 in the first bipolar plate layer 108 and the thickness of the second bipolar plate layer 110.
  • each feed channel 132 Due to the center of gravity of the free cross section of each feed channel 132 and parallel to the bead longitudinal direction 136, a flow axis 138 of the respective feed channel 132 extends.
  • the feed channels 132 follow one another along the sealing longitudinal direction 122 of the sealing arrangement 118 such that the throughflow axes 138 of successive feed channels 132 each have a distance D from one another.
  • the number of feed channels 132 is preferably two or more, in particular three or more, for example five.
  • all feed channels 132 have flow axes 138 aligned parallel to one another.
  • the feed channels 132 preferably open at the beading edge 126a of the beading 124 of the sealing element 120 facing the medium-carrying region 115 (medium channel 114).
  • the sealing arrangement 118 further comprises one or more discharge channels 140, through which the inner space 130 of the sealing element 120 is in fluid communication with the flow field 116.
  • the flow field 116 lies in an outer region 117 of the medium-carrying region 115, wherein the sealing arrangement 118 for sealing the medium-carrying region 115 between the medium-carrying region 115 and the outer region 117 is arranged.
  • each discharge channel 140 in each case comprises a bead 142 in one of the bipolar plate layers 108, 110 of the bipolar plate 106, for example in the first bipolar plate layer 108.
  • This bead 142 extends in each case along a bead longitudinal direction 144, which preferably extends transversely, in particular substantially perpendicular, to the longitudinal direction of the seal 122.
  • the bead 142 may have a substantially trapezoidal cross-section.
  • the height h 'of a discharge channel 140 is composed of the height of the bead 142 of the first bipolar plate layer 108 and the thickness of the second bipolar plate layer 110.
  • each discharge channel 140 Due to the center of gravity of the free cross section of each discharge channel 140 and parallel to the bead longitudinal direction 144, a throughflow axis 146 of the respective discharge channel 140 extends.
  • the discharge channels 140 follow one another along the sealing longitudinal direction 122 of the sealing arrangement 118 so that the throughflow axes 146 of successive discharge channels 140 each have a distance D 'from one another.
  • the distance D 'between the flow axes 138 of successive discharge channels 140 is preferably substantially the same as the distance D between the flow axes 138 of successive feed channels 132.
  • the number of discharge channels 140 is preferably two or more, in particular three or more, for example five.
  • the number of discharge channels 140 is the same as the number of supply channels 132.
  • all discharge channels 140 have flow axes 146 aligned parallel to one another.
  • the discharge channels 140 preferably open at the bead leading edge 126b facing away from the medium-carrying region 115 (medium channel 114) of the beading 124 of the sealing element 120.
  • At least one of the discharge channels 140 is arranged offset relative to all supply channels 132 in the longitudinal direction of the seal 122.
  • the flow axis 146 of at least one of the discharge channels 140 is not arranged collinear with the throughflow axis 138 of any one of the feed channels 132.
  • the offset V between the flow axis 146 of a discharge channel 140 and the throughflow axis 138 of an adjacent feed channel 132 is approximately the same as half the distance D between the flow axes 138 of the feed channels 132 following one another in the longitudinal direction of the seal 122 and / or Is substantially equal to half of the distance D 'between the flow axes 146 of successive in the seal longitudinal direction 122 discharge channels 140th
  • the rigidity of the seal assembly 118 can be selectively varied in order to achieve the best possible sealing effect.
  • the height h of the feed channels 132 and / or the height h 'of the discharge channels 140 is, for example, equal to or preferably smaller than the height H of the sealing element 120.
  • the end of each feed channel 132 which faces away from the sealing element 120 and lies within the medium-carrying region 115, for example the medium channel 114, sealed by the sealing arrangement 118 has an inlet opening 148, through which the relevant feed channel 132 is in fluid communication with the medium-carrying region 115, in particular with the medium channel 114, stands.
  • each discharge channel 140 facing away from the sealing element 120 can optionally be opened or closed.
  • this end of the discharge channel 140 facing away from the sealing element 120 is provided with an outlet opening 150, through which the discharge channel 140 is in fluid communication with the flow field 116.
  • all the discharge channels 140 are in fluid communication with all the feed channels 132 through the interior 130 of the sealing element 120.
  • FIGS. 3 to 5 A second embodiment of an electrochemical device 100 shown in FIGS. 3 to 5, which comprises a stack of a plurality of electrochemical units 104 following one another in the stacking direction 102 and at least one sealing arrangement 118 for sealing between a medium-carrying region 115, for example a medium channel 114, and an outer region 117 of the medium-carrying area 115, the
  • sealing element 120 of the sealing arrangement 118 not only has a bead 124 which is located in one of the bipolar plate layers 108, 110 of the bipolar plate 106,
  • the two beads 124a and 124b may in particular be designed and arranged substantially mirror-symmetrically to each other.
  • each feed channel 132 also includes a first bead 134a in the first bipolar plate layer 108 and a second bead 134b in the second bipolar plate layer 110, respectively.
  • the two beads 134a and 134b are preferably formed and arranged substantially mirror-symmetrical to each other.
  • each discharge channel 140 also comprises in each case a first bead 142a in the first bipolar plate layer 108 and a second bead 142b in the second bipolar plate layer 110.
  • the two beads 142a and 142b of the discharge channels 140 are preferably formed and arranged mirror-symmetrically to one another.
  • the sealing element 120 has a height H, which is composed of the height of the first bead 124a in the first bipolar plate layer 108 and the height of the second bead 124b in the second bipolar plate layer 110.
  • the height h of a feed channel 132 in this embodiment is composed of the height of the first bead 134a in the first bipolar plate layer 108 and the height of the second bead 134b in the second bipolar plate layer 110.
  • the height h 'of a discharge channel 140 in this embodiment is composed of the height of the first bead 142a in the first bipolar plate layer 108 and the height of the second bead 142b in the second bipolar plate layer 110.
  • the number of supply channels 132 and / or the number of discharge channels 140 in the second embodiment may be greater than in the first embodiment, for example six or more, be the same size as in the first embodiment, or be smaller than in the first embodiment ,

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un système d'étanchéité conçu pour assurer une étanchéité entre une zone conductrice de milieu d'un dispositif électrochimique et une zone externe de ladite zone conductrice de milieu, comprenant un élément d'étanchéité présentant une direction longitudinale d'étanchéité, au moins un canal d'acheminement permettant d'acheminer le milieu, de la zone conductrice de milieu jusqu'à un espace interne de l'élément d'étanchéité, et au moins un canal d'évacuation permettant d'évacuer le milieu se trouvant dans l'espace interne de l'élément d'étanchéité. L'objectif de cette invention est de concevoir un système d'étanchéité présentant une distribution de rigidité aussi homogène que possible le long de l'élément d'étanchéité. A cet effet, le canal d'évacuation ou au moins un des canaux d'évacuation est agencé de manière décalée par rapport au canal d'acheminement ou par rapport à tous les canaux d'acheminement dans la direction longitudinale d'étanchéité.
PCT/EP2018/068563 2017-07-14 2018-07-09 Système d'étanchéité conçu pour un dispositif électrochimique WO2019011869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017115884.7A DE102017115884A1 (de) 2017-07-14 2017-07-14 Dichtungsanordnung für eine elektrochemische Vorrichtung
DE102017115884.7 2017-07-14

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Publication Number Publication Date
WO2019011869A1 true WO2019011869A1 (fr) 2019-01-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20308332U1 (de) 2002-10-14 2004-02-12 Reinz-Dichtungs-Gmbh & Co. Kg Elektrochemisches Verdichtersystem
US20080226967A1 (en) * 2007-03-12 2008-09-18 Tighe Thomas W Bifurcation of flow channels in bipolar plate flowfields
US20090075134A1 (en) * 2006-05-01 2009-03-19 Honda Motor Co., Ltd. Fuel cell
US20090169964A1 (en) * 2005-12-16 2009-07-02 Sadao Ikeda Separator of Fuel Cell
DE102011118817A1 (de) 2010-11-23 2012-05-24 GM Global Technology Operations LLC Brennstoffzellen-separatorplatte

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012004927U1 (de) * 2012-05-16 2013-08-19 Reinz-Dichtungs-Gmbh Befeuchter
DE202014008157U1 (de) * 2014-10-08 2016-01-20 Reinz-Dichtungs-Gmbh Elektrochemisches System

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20308332U1 (de) 2002-10-14 2004-02-12 Reinz-Dichtungs-Gmbh & Co. Kg Elektrochemisches Verdichtersystem
US20090169964A1 (en) * 2005-12-16 2009-07-02 Sadao Ikeda Separator of Fuel Cell
US20090075134A1 (en) * 2006-05-01 2009-03-19 Honda Motor Co., Ltd. Fuel cell
US20080226967A1 (en) * 2007-03-12 2008-09-18 Tighe Thomas W Bifurcation of flow channels in bipolar plate flowfields
DE102011118817A1 (de) 2010-11-23 2012-05-24 GM Global Technology Operations LLC Brennstoffzellen-separatorplatte

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