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WO2002065572A2 - Element electrochimique - Google Patents

Element electrochimique Download PDF

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Publication number
WO2002065572A2
WO2002065572A2 PCT/DE2002/000560 DE0200560W WO02065572A2 WO 2002065572 A2 WO2002065572 A2 WO 2002065572A2 DE 0200560 W DE0200560 W DE 0200560W WO 02065572 A2 WO02065572 A2 WO 02065572A2
Authority
WO
WIPO (PCT)
Prior art keywords
electrochemical
current collector
plates
frame element
frame
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.)
Ceased
Application number
PCT/DE2002/000560
Other languages
German (de)
English (en)
Other versions
WO2002065572A3 (fr
Inventor
Matthias Bronold
Uwe Schattauer
Christian Leu
Wilhelm Thom
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.)
Heliocentris Energiesysteme GmbH
Original Assignee
Heliocentris Energiesysteme GmbH
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
Priority claimed from DE2001107789 external-priority patent/DE10107789A1/de
Priority claimed from DE2001107790 external-priority patent/DE10107790A1/de
Priority claimed from DE2001107788 external-priority patent/DE10107788A1/de
Application filed by Heliocentris Energiesysteme GmbH filed Critical Heliocentris Energiesysteme GmbH
Priority to AU2002249072A priority Critical patent/AU2002249072A1/en
Publication of WO2002065572A2 publication Critical patent/WO2002065572A2/fr
Anticipated expiration legal-status Critical
Publication of WO2002065572A3 publication Critical patent/WO2002065572A3/fr
Ceased 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
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • 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
    • H01M8/24—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
    • H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
    • 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 an electrochemical element formed from a plurality of electrochemical cells, which comprises membrane electrode assemblies sealingly held on a frame element, alternatingly arranged bipolar plates and a current collector plate and an end plate on both sides, with openings in the edge region of the frame element and the plates for the formation of feed and discharge channels for at least one of the reactants are provided, which are connected to open fluid distribution channels molded into the bipolar and current collector plates and adjoining the anode or cathode layer of the membrane electrode assembly.
  • a fuel cell is also known from JP 07249417 A, in which the fluid transport between the supply and discharge channels and the fluid distribution channels formed in the current transfer and current collector plates and open to the membrane electrode unit via channels provided in the frame elements - follows.
  • the frame elements are designed to be strong enough to accommodate the connecting channels. Accordingly, the strength of the current transfer and current collector plates in the region of the frame element was reduced, while the part of these plates provided with the fluid distribution channels projects into a recess delimited by the vertical inner edge of the frame element.
  • Seal bead applied from curable silicone or an epoxy resin and then connected to the adjacent bipolar plate by curing the sealing material by gluing.
  • This complex process is not suitable for the rapid, as automated as possible, assembly of a fuel cell stack.
  • sealing elements are injection molded onto the bipolar plates in a two-stage process. Although the molded seals can simplify assembly, the manufacturing process is complex or the sealing effect is insufficient or the membrane electrode assembly can be damaged due to the high contact pressure required, so that leaks occur.
  • the invention has for its object to provide an electrochemical element of the type mentioned in such a way that with precise, safe and congruent positioning of the individual components and the media-carrying channels a simple, less time-consuming assembly is possible and yet an exact seal is guaranteed.
  • the individual components of the burner Material cell namely the frame elements, the bipolar plates, current collector plates and end plates during the assembly and in the assembled state, corresponding to one another, firstly performing a guiding function and then a holding function in the form of recesses in one part and elevations engaging in them in the adjacent part or are also formed by elevations spanning the outer edge of the adjacent part.
  • the mutual guidance during assembly and the mutual mounting and precise positioning after the components have been assembled can also be brought about by the region of the fluid distributor channels being molded onto the bipolar and current collector plates as a truncated cone-like elevation, while the frame element forms a correspondingly shaped recess for precisely fitting the elevation.
  • the framed membrane electrode assemblies and the bipolar or current collector plates automatically slide with a large amount of play to a precisely fitting end position that seals against the bevelled side edges, in which the connection channels and the flood distribution channels are exactly aligned.
  • the bevelled side surfaces can be flat or can be convex or concave in the mounting direction in order to further facilitate sliding into one another.
  • An inventive feature which considerably simplifies assembly and also ensures the secure sealing between the assembled components also consists in the use of a frame element, on the surfaces of which facing the adjacent components, an elastically formed elevation is integrally formed or formed as a seal.
  • the electrochemical element for example a fuel cell or a fuel cell stack, can thus be easily and quickly, in particular also automatically, with a high degree of accuracy and sealing effect and thus without impairing functionality. be installed during operation of the electrochemical element.
  • Fig. 2 is a side view of a membrane electrode unit held in a frame element.
  • FIG. 3 shows a partial view of a fuel cell stack in section, specifically in an exploded view of a membrane electrode assembly with a bipolar plate arranged on both sides;
  • FIG. 4 shows a side view of a membrane electrode unit according to FIG. 1 in a first embodiment variant
  • FIG. 5 shows a side view of a membrane electrode unit according to FIG. 1 in a second embodiment
  • Fig. 6 is a partial view of a fuel cell stack as in Fig. 1, but in a third embodiment of the membrane electrode assembly and the bipolar plates.
  • FIG. 7 shows a plan view of a membrane electrode unit held in a frame element with a circumferential seal which is integrally formed on both sides of the frame element and which is also guided around the opening of the feed channel and the discharge channel for the reactants; and 8 is an exploded sectional view of part of a fuel cell stack, consisting of a membrane electrode unit arranged between two bipolar plates with seals molded onto their frame element.
  • the fuel cell stack initially comprises a plurality of membrane electrode units 1, each of which is held in a frame element 2 comprising two frame parts (not shown) sealingly connected by means of a hot-melt adhesive layer, bipolar plates (current transfer plates) 3 arranged between them and on the outer membrane electrode Units arranged current collector plates 4 and finally end plates 5, via which the fuel cell stack is held together with clamping bolts (not shown) which are guided in bores 12.
  • a frame element 2 comprising two frame parts (not shown) sealingly connected by means of a hot-melt adhesive layer, bipolar plates (current transfer plates) 3 arranged between them and on the outer membrane electrode Units arranged current collector plates 4 and finally end plates 5, via which the fuel cell stack is held together with clamping bolts (not shown) which are guided in bores 12.
  • the feed channel 6 and the discharge channel 7 for the first reactant which are formed from openings which are provided in the plates and frame elements 2 to 5 and are aligned one above the other, are shown.
  • connection between the feed channel 6 or the discharge channel 7 and the fluid distribution channel 9 for the first reactant is established via a connecting channel 8 in the frame element 2.
  • Sealing elements 10 are arranged for sealing.
  • the fluid distribution channels for the second reactant are identified by reference number 11.
  • the associated connecting channels to the supply and discharge channels 14, 15 (FIG. 2) for the second reactant cannot be seen in the selected sectional view (FIG. 1).
  • the recess 13 formed by the frame element 2 in the area of the active surface of the membrane-electrode unit 1 is - like the elevation 14 formed by the area of the fluid distribution channels 9, 11 - designed as a truncated cone by chamfered edges 17, 18.
  • the frame elements 2 and the bipolar plates or current collectors Mer plates can therefore be joined together with a large amount of play and thus in a simple manner, and yet after assembly they lie tightly together and at the connection points of the fluid distribution channels to the connecting channels.
  • FIGS. 3 and 6 only show part of a fuel cell stack, that is to say a membrane electrode unit 1 held in a frame element 2 with bipolar plates 3 shown on both sides at a distance from it.
  • the fuel cell stack actually consists of several alternately and with the help of seals (not shown), gas-tight membrane electrode units and bipolar plates, each with a current collector plate (anode or cathode plate) and an end plate (each not shown) on the outer membrane electrode units ) connect.
  • Frame element 2 held which consists of two, essentially stiff plates joined together via a hot melt adhesive layer (not shown).
  • the non-active edge region of the membrane electrode unit 1 is also embedded in this hot melt adhesive layer.
  • male and female guiding and fixing elements in the form of recesses 13 and elevations 14 opposite these in the fuel cell stack are provided on the frame element 3 and the bipolar plates 3 on both sides.
  • These guiding and fixing means 13 and 14 are each arranged at a distance from the outer edge or directly on the outer edge (FIG. 6). They can be punctiform (Fig. 4) or elongated (Fig. 5). They are dimensioned so that they are in the assembled, gas-tight
  • the fuel cell stack lies in one another or in one another essentially without play. A mutual lateral displacement is not possible after assembly.
  • the supply and discharge channels for the reactants are arranged in alignment and the seals (not shown) are arranged exactly around the openings for forming the supply and discharge channels.
  • the recesses 13 can also be provided in the frame elements 2 and the elevations 14 in the bipolar plates 3, or the bipolar plate 3 and the frame element 2 can have a recess (depression) on one side and an elevation on the other side.
  • the guiding and fixing means 13 and 14 are also formed in the current collector plates and on the inside of the end plates (not shown in each case).
  • the recesses 13 and the elevations 14 are designed with oblique side surfaces, that is to say they taper conically towards the interior of the recess 13 and towards the tip of the elevation 14, so that adjacent guide and fixing elements 13 , 14 are initially guided into one another with a large amount of play and, after the fuel cell stack has been braced over the end plates, a congruent and secure arrangement of all plates is nevertheless ensured.
  • H ad EU O: ⁇ o I- 1 0>: Cd ⁇ a • tr 1 ⁇ tr er 1 ⁇ er HV rr a in p- ⁇ H- 0 ) tr ) D. as • ⁇ ⁇ öd 0J rr t ⁇ Cd 3 P 1
  • the seal 20, 20a is shown as an integrally formed oval, elastic sealing strand, which - starting from an originally round strand - assumes this shape only under the effect of the contact pressure in the assembled fuel cell stack and thus a wide elastic sealing surface on the adjacent bipolar plate 3 forms.
  • the cross-sectional area of the seal 20, 20a can of course also have any other shape that results in an elastic deformation and thus a good seal, for example in the form of a sealing lip.
  • the frame element with an integrated seal also has the essential advantage that the fuel cell or the fuel cell stack can be installed quickly and easily, since the frame elements with the integrated seals are easy to handle and the time-consuming application of the seal is eliminated. LIST OF REFERENCE NUMBERS

Landscapes

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

Abstract

L'invention concerne un élément électrochimique, en particulier une pile à combustible ou un empilement de piles à combustible, dans lequel des moyens de guidage et de fixation (13, 14) biseautés ou coniques en sens inverse, disposés les uns dans les autres ou contre les autres, sont placés des deux côtés dans ou sur des éléments de cadre (2) de l'unité membrane-électrode (1) et sur les plaques de réception de courant et bipolaires (3, 4) de façon à permettre un positionnement précis, un assemblage et une fixation mutuelle des composants adjacents lors du montage. Au cours du montage, les parties creuses et les parties en relief (13, 14) s'insèrent facilement et automatiquement les unes dans les autres, avec au départ un jeu important, puis elles se positionnent les unes par rapport aux autres de façon parfaitement ajustée et étanche. Grâce à une garniture (10) intégrée dans l'élément de cadre (2), le montage est considérablement simplifié.
PCT/DE2002/000560 2001-02-13 2002-02-13 Element electrochimique Ceased WO2002065572A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002249072A AU2002249072A1 (en) 2001-02-13 2002-02-13 Electrochemical cell stack

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE2001107789 DE10107789A1 (de) 2001-02-13 2001-02-13 Brennstoffzelle
DE2001107790 DE10107790A1 (de) 2001-02-13 2001-02-13 Brennstoffzelle oder Brennstoffzellenstack
DE10107788.2 2001-02-13
DE10107790.4 2001-02-13
DE2001107788 DE10107788A1 (de) 2001-02-13 2001-02-13 Elektrochemisches Element
DE10107789.0 2001-02-13

Publications (2)

Publication Number Publication Date
WO2002065572A2 true WO2002065572A2 (fr) 2002-08-22
WO2002065572A3 WO2002065572A3 (fr) 2004-05-06

Family

ID=27214301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/000560 Ceased WO2002065572A2 (fr) 2001-02-13 2002-02-13 Element electrochimique

Country Status (2)

Country Link
AU (1) AU2002249072A1 (fr)
WO (1) WO2002065572A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047205A3 (fr) * 2002-11-15 2004-07-29 3M Innovative Properties Co Ensemble pile a combustible unitaire et refroidisseur
US6989214B2 (en) 2002-11-15 2006-01-24 3M Innovative Properties Company Unitized fuel cell assembly
EP1826849A1 (fr) * 2006-02-24 2007-08-29 Auto-Juntas, S.A. Unipersonal Assemblage membrane-électrode ayant une structure d'étanchéité renforcée
US7297428B2 (en) 2003-10-31 2007-11-20 3M Innovative Properties Company Registration arrangement for fuel cell assemblies
US7351490B2 (en) 2003-01-30 2008-04-01 Honda Motor Co., Ltd. Fuel cell
WO2011026537A1 (fr) * 2009-09-03 2011-03-10 Daimler Ag Ensemble membrane pour empilement de piles a combustible et empilement de piles à combustible comportant cet ensemble membrane
WO2013161200A1 (fr) * 2012-04-27 2013-10-31 Panasonic Corporation Pile à combustible du type à électrolyte polymère solide, et ensemble membrane électrolytique-électrode-cadre
AT524562B1 (de) * 2021-08-13 2022-07-15 H2i GreenHydrogen GmbH Abdichtungsvorrichtung als Zellperipherie für einen Elektrolysezellen-Stack

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8622749D0 (en) * 1986-09-22 1986-10-29 Ici Plc Electrolytic cell & gasket
US4886586A (en) * 1988-09-26 1989-12-12 The Dow Chemical Company Combination electrolysis cell seal member and membrane tentering means for a filter press type electrolytic cell
ATE232019T1 (de) * 1999-07-01 2003-02-15 Squirrel Holdings Ltd Durch membran getrennter bipolarer mehrzelliger elektrochemischer reaktor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8153316B2 (en) 2002-11-15 2012-04-10 3M Innovative Properties Company Unitized fuel cell assembly and cooling apparatus
US6989214B2 (en) 2002-11-15 2006-01-24 3M Innovative Properties Company Unitized fuel cell assembly
WO2004047205A3 (fr) * 2002-11-15 2004-07-29 3M Innovative Properties Co Ensemble pile a combustible unitaire et refroidisseur
CN100592556C (zh) * 2002-11-15 2010-02-24 3M创新有限公司 组合式燃料电池组件和冷却器件
US7351490B2 (en) 2003-01-30 2008-04-01 Honda Motor Co., Ltd. Fuel cell
US7297428B2 (en) 2003-10-31 2007-11-20 3M Innovative Properties Company Registration arrangement for fuel cell assemblies
US7862950B2 (en) 2006-02-24 2011-01-04 Auto-Juntas, S.A. Unipersonal Membrane electrode assembly
WO2007096012A1 (fr) * 2006-02-24 2007-08-30 Auto-Juntas, S.A. Unipersonal Ensemble electrode a membrane avec structure d'etancheite renforcee
EP1826849A1 (fr) * 2006-02-24 2007-08-29 Auto-Juntas, S.A. Unipersonal Assemblage membrane-électrode ayant une structure d'étanchéité renforcée
WO2011026537A1 (fr) * 2009-09-03 2011-03-10 Daimler Ag Ensemble membrane pour empilement de piles a combustible et empilement de piles à combustible comportant cet ensemble membrane
WO2013161200A1 (fr) * 2012-04-27 2013-10-31 Panasonic Corporation Pile à combustible du type à électrolyte polymère solide, et ensemble membrane électrolytique-électrode-cadre
US20140377679A1 (en) * 2012-04-27 2014-12-25 Panasonic Corporation Solid polymer electrolyte type fuel cell, and electrolyte membrane-electrode-frame assembly
US9490497B2 (en) 2012-04-27 2016-11-08 Panasonic Intellectual Property Management Co., Ltd. Solid polymer electrolyte type fuel cell, and electrolyte membrane-electrode-frame assembly
AT524562B1 (de) * 2021-08-13 2022-07-15 H2i GreenHydrogen GmbH Abdichtungsvorrichtung als Zellperipherie für einen Elektrolysezellen-Stack
AT524562A4 (de) * 2021-08-13 2022-07-15 H2i GreenHydrogen GmbH Abdichtungsvorrichtung als Zellperipherie für einen Elektrolysezellen-Stack

Also Published As

Publication number Publication date
WO2002065572A3 (fr) 2004-05-06
AU2002249072A1 (en) 2002-08-28

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