WO2011141308A1 - Empilement de piles à combustible et son procédé de production - Google Patents

Empilement de piles à combustible et son procédé de production Download PDF

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Publication number
WO2011141308A1
WO2011141308A1 PCT/EP2011/056919 EP2011056919W WO2011141308A1 WO 2011141308 A1 WO2011141308 A1 WO 2011141308A1 EP 2011056919 W EP2011056919 W EP 2011056919W WO 2011141308 A1 WO2011141308 A1 WO 2011141308A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel cell
cell stack
components
media
thermoplastic
Prior art date
Application number
PCT/EP2011/056919
Other languages
German (de)
English (en)
Inventor
Thomas Zeller
Christian Koerber
Bernhard Brüne
Original Assignee
Trumpf Werkzeugmaschinen Gmbh + Co. Kg
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 Trumpf Werkzeugmaschinen Gmbh + Co. Kg filed Critical Trumpf Werkzeugmaschinen Gmbh + Co. Kg
Publication of WO2011141308A1 publication Critical patent/WO2011141308A1/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
    • 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
    • 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
    • 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
    • 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
    • H01M8/0286—Processes for forming seals
    • 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
    • H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
    • 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
    • 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 fuel cell stack, which
  • the invention relates to a method for producing a fuel cell stack.
  • Known fuel cell stacks usually comprise several
  • Fuel cells stacked along a stacking axis Each have at least one membrane electrode unit, which is enclosed on both sides of media-guide units, which the supply and distribution of the media (fuel gas, usually hydrogen, oxidant, usually air, and coolant) and the removal of gaseous reaction products (water vapor) and, in the case of superstoichiometric operation, also the reaction educts (air,
  • a fuel cell stack forms a single fuel cell with a membrane-electrode assembly enclosed by two media guide units.
  • Fuel cell stacks include a variety of components that must be interconnected and sealed. Regardless of the type of construction, the connection points represent a special challenge during operation, because their functionality is functional and safety-relevant and they are subject to considerable thermal, mechanical, electrical and chemical loads. It is known for sealing individual components of the
  • the fuel cell stack according to US 2001/0001052 A1 has sealing rings made of a thermoplastic material.
  • the sealing rings made of thermoplastic material have the task of separating layers between individual components of the
  • Fuel cell stack edge seal to the outside and at the same time to glue the components together.
  • the individual components of the fuel cell stack are thus by means of the sealing ring only at the edges, ie to the outside, but not inside the
  • the object is achieved by a
  • an adhesive layer consisting of thermoplastic or two-component or multi-component adhesive, which extends essentially over the entire stacked cross section, serves for
  • Fuel cell stack is the thermoplastic or the two- or multi-component adhesive at least on that side surface one of the components applied, which faces the other component in the stacked state.
  • the stack cross-section of the fuel cell stack can vary along the stack axis.
  • the stacking cross-section is along the stacking axis
  • the fuel cell stack is z. B. of a housing and other peripheral elements, such as. Process gas lines, power connections, etc., surrounded.
  • the stacked cross-section of the fuel cell stack does not comprise the housing and the peripheral elements.
  • the adhesive layer of thermoplastic or two-component or multi-component adhesive extends over the entire, at the
  • junction prevailing stack cross section d. H. essentially, all are along the stacking axis at the junction
  • Multi-component adhesives existing adhesive layer with each other
  • thermoplastic adhesive or consisting of two- or multi-component adhesive layer covers relatively large areas of the stack cross-section throughout.
  • thermoplastic or of two- or multi-component adhesives
  • existing adhesive layer may well have recesses, holes, etc. If, for example, at least one of the components on the side surface, which faces the other component, a Has recess or the like, is in this area optionally on the thermoplastic or two- or
  • the erfindungsffleße thermoplastic serves
  • Adhesive layer as a leveling layer for manufacturing tolerances of the other components, since the thermoplastic material can be added regardless of the manufacturing process at any time by heating in a plastic state, corrections z. B. regarding.
  • the respective plastic components are applied separately to the facing components and then activated under contact and optionally pressure. Since the chemical reaction that takes place between the components of the two-component or multi-component adhesive and leads to sticking together of the components takes a certain amount of time, the components do not stick together immediately, but only together after a certain time. In this way, the adhesive layer consisting of two-component or multi-component adhesive adjusts itself to the shape of the respective components even in the plastic state and thus compensates for manufacturing tolerances without it having to be heated.
  • the invention has the advantage that such a fuel cell stack can be produced inexpensively and in large quantities without a loss of quality in terms of sealing and
  • Adhesive properties must be accepted.
  • the use of flexible components can be avoided in this way,
  • thermoplastic resin Furthermore, it is through the use of a thermoplastic resin
  • the adhesive layer consisting of the thermoplastic or two- or multi-component adhesives are provided with recesses through which at least one extends along the Stacking axis extending through the adhesive layer therethrough
  • the functional cavity is through the
  • thermoplastic or of two- or multi-component adhesives
  • the functional cavity can be used in particular for
  • a compact construction of a media-guide unit of a fuel cell stack according to the invention which is characterized by a high density, results from the fact that the media-guide unit has a plurality of successive along the stack axis components, each by means of an adhesive layer of thermoplastic material or Two-component or multi-component are connected to each other, wherein the thermoplastic adhesive or consisting of two-component or multi-component adhesive layers extend substantially over the entire stack cross-section.
  • the components of the media-guide unit are connected to one another by means of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consisting of two-component or multicomponent calenders, with recesses or openings of the thermoplastic adhesive layers consist
  • a channel structure is formed, and wherein the channel structure at least between the
  • thermoplastic or of two- or multi-component adhesive
  • Components formed thin surface are Components formed thin surface.
  • the first component formed thin surface.
  • Thin-surface components in particular sheets, can be easily processed by mechanical, such as punching, or thermal processes, such as. Laser cutting. Machining methods such as milling, drilling or molding by injection molding can be largely avoided.
  • the thin-walled components are made of metal, that is, the components are formed in particular as sheets.
  • Aluminum sheet are made.
  • An advantage of aluminum sheet for use in the fuel cell stack are its low density, high electrical and thermal conductivity and its corrosion resistance through the passivatable surface.
  • aluminum is easily machinable and thermally workable.
  • planar components are also at least largely flat or flat designed, d. H. they have at least largely no from the component level above forming, spacers, etc. on.
  • the components may also be soldered together and otherwise connected and sealed together.
  • the channel structure can be inside the compactly constructed media guide unit to be distinctly fiiigran and designed with a high degree of freedom with regard to geometric design.
  • the process gases, or the cooling medium, of the membrane-electrode unit are preferably added to or removed from the latter.
  • the supply and removal of the process gases can be easily by means of such a structure by separate input or
  • thin-surface components in particular sheets, which are formed to one, preferably to both, the main axes of the stack cross-section largely mirror-symmetrical.
  • the components are preferably by means of adhesive layers consisting of two-component or multi-component adhesives
  • thermoplastic or from two- or multi-component screed
  • Channel structures can be easily, inexpensively and efficiently produced by means of thermoplastic or two- or
  • the fuel cell stack can preferably be formed as a stack of individual cells, wherein at least two of these individual lines are connected to each other by an existing of thermoplastic or two- or multi-component glue adhesive layer which extends substantially over the entire cross section of the individual cells.
  • a single cell consists of a membrane-electrode unit and media-guide units, in particular of the construction described above. It is also possible to provide the membrane-electrode unit with its own frame and the media-guide units without a fixed connection, such. an adhesive layer, to
  • thermoplastic adhesive layer may be used in the case of a thermoplastic bond
  • Fuel cell stack mitteis a new thermoplastic
  • Adhesive layer to be reconnected and sealed are the individual
  • Fuel cells designed as PEM fuel cells are designed as PEM fuel cells.
  • the media-guide units located between the membrane-electrode assemblies are constructed so that they respectively face on both sides on like operating sides of the membrane-electrode assemblies, ie, either the anode sides or the cathode sides of the membrane -Electrode units / adjacent.
  • This stacking sequence has the advantage of providing a gas barrier between that portion of the media guide unit that supplies one of the two adjacent membrane electrode assembly and that portion of the media guide assembly that houses the other membrane electrode assembly supplied, can be waived.
  • the current in this arrangement is preferably not passed through the media guide units, but over those
  • Membrane electrode unit stand, derived. In this way, the formation of electrochemical cells is avoided and the use of Bioplarplatten can be completely dispensed with.
  • Each of the membrane-electrode units can be switched separately, resulting in a wide range of possibilities of interconnecting individual tents, blocks of single cells or sub-stacks. So is also a parallel connection of the single cells or blocks of
  • thermopiastic plastic used has a crystalline behavior, which has the advantage that the thermopiastic plastic used
  • thermoplastic material can be both a completely crystalline plastic and also a plastic with a predominantly crystalline structure, which is, for example, 60% crystalline.
  • thermoplastic adhesive layer or the thermoplastic thermoplastic thermoplastic
  • thermoplastic or the two- or
  • Mehrkomponentenkieber is preferably formed acid resistant. Since phosphoric acid is frequently used in high-temperature PE fuel cells within the membrane electrode units, and Nafion is frequently used as the electrode in low-temperature fuel cells, the thermoplastic or the two-component or multi-component valve thus retains its properties
  • thermoplastic for example, perfluoroalkoxyalkane (PFA), fluorinated ethylene-propylenes (FEP) such as FEP-Norton®, aromatic polymers such as PEEK TM or polyfluorocarbon coating such as FEP or PFA provided polyimides such as Kapton®, Norton®,
  • the thermoplastic or the two- or multi-component adhesive has an operating temperature between -40 ° C and 200 ° C.
  • the fuel cell stack can be operated over a wide temperature range, both the operation of a low-temperature fuel cell stack (NT-PEM) and a high-temperature fuel cell stack (HT-PEM) is possible in this way.
  • N-PEM low-temperature fuel cell stack
  • HT-PEM high-temperature fuel cell stack
  • At least one component is first attached to the side surface to be joined to the thermoplastic
  • thermoplastic or the two- or multi-component adhesive coated and then recesses introduced into the device can be applied in a simple manner to the (still) continuous side surface of the component.
  • first recesses, openings, recesses, etc. in at least one
  • thermoplastic or a two- or
  • Multi-component adhesive coated Since both the handling of flexible components can be avoided in this way and the waste can be disposed of sorted, brings such a method
  • thermoplastic material or of the two-component or multi-component adhesive takes place in particular selectively, ie only on the areas of the side surface of the components, which are subsequently also connected to another component.
  • this is done by dipping, extrusion, screen printing, screen printing with rotating screens or a hotmelt process.
  • a further aspect of the invention is to provide a mechanical installation for carrying out a method according to the invention for producing a fuel cell stack.
  • Fig. L the structure of a fuel cell assembly with a
  • Fuel cell stack and 2 shows a section through a section of the fuel cell stack of Figure 1
  • Fig. 1 shows the structure of a Brennstoffzelienaggregats 1 z. B. for mobile use.
  • the fuel cell unit 1 has a fuel cell stack 2 and a housing 3 surrounding the fuel cell stack 2.
  • the housing 3 includes not shown and
  • the fuel cell stack 2 has a plurality of membrane electrode assemblies 5 consecutive along a stacking axis 4, each having an anode side 6 and a cathode side 7.
  • Membrane electrode units 5 a media guide unit 8 and 9 is arranged in each case.
  • a media guide unit 8 and 9 is arranged in each case.
  • Fuel cell stack 2 formed much narrower.
  • Two different types of media guide units 8 and 9 are provided.
  • the combustion gas in particular hydrogen
  • the cathode sides 7 of the membrane-electrode units 5 is supplied.
  • a hydrogen medium guide unit 8 is therefore arranged in each case between two membrane electrode Einhetten 5, the cathode sides 7 of the hydrogen medium guide unit 8 are facing.
  • the oxygen-media-guide units 9 (except for the two outer ones) are each surrounded by two membrane-electrode units 5 whose anode sides 6 face the oxygen-medium-guide unit 9.
  • the media-guiding units 8, 9 are also used for the removal of reaction gases, in particular water vapor, as well as excess starting gases. Furthermore, a coolant may circulate through the media guide units 8, 9.
  • the fuel cell stack 2 has a substantially uniform, along the stacking axis 4, rectangular stacking cross-section, which is generally designated by the reference numeral 10 in FIG.
  • the stack cross-section 10 may span a rectangular area of 200 mm x 240 mm, but other cross-sectional shapes and sizes may be advantageous depending on the use and installation situation of the fuel cell assembly 1.
  • Fig. 2 shows an exemplary section of the fuel cell stack 2 in a view of a parallel to the stacking axis 4 extending
  • Fuel cell stack in Figure 1 is indicated by a dashed frame 11, the aspect ratios of the frame accordingly due to the distorted representation of the fuel cell stack 2 in Fig. 1 is not the actual conditions and differ from the
  • an oxygen-media-guide unit 9, a membrane-electrode unit 5 and a (in Figure 2 from bottom to top) Hydrogen edien guide unit 8 only partially shown.
  • the media-guide units 8, 9 shown adjoin a membrane-electrode unit 5, etc., again along the stacking axis 4.
  • the membrane electrode unit 5 has a frame-shaped spacer plate 14 with a relatively large, central recess 15.
  • the sealing rings 16 are followed by two gas diffusion layers 17. In FIG. 2, only a small edge section is in each case
  • Gas diffusion layers 17 shown. The gas diffusion layers 17
  • Recess 15 of the frame-shaped spacer 14. include between them the reaction zone of the membrane electrode assembly 5 (not shown), which is a membrane, for. B. a proton exchange membrane, and catalyst layers.
  • FIG. 2 shows a boundary 18 arranged between the two gas diffusion layers 17 and the two sealing rings 16, which surrounds the reaction zone of the membrane electrode unit 5 in a circumferential manner.
  • the membrane-electrode unit 5 has a potential-separating layer 20 arranged along the stacking axis 4 between the frame-shaped spacer bend 14 and the oxygen-medium-guide unit 9.
  • the potential separation layer 20 is congruent with the
  • the frame-shaped spacer plate 14 is formed. It consists of one electrically insulating material and is used for electrical isolation between the spacer plate 14 and the oxygen-media-guide unit 9.
  • the potential separation layer 20 is formed of a thermoplastic material layer, which is also designed as an adhesive layer.
  • the potential separation layer 20 z. B. have an adhesive coated plastic film. The potential separation layer 20 can also be inserted without adhesive connection in the appropriate place.
  • the oxygen-media guide unit 9 includes in this case
  • the first thin-surface and planar structural plates 22 preferably made of aluminum.
  • Oxygen Media Guide Unit 9 also less or more
  • the structural plates 22 each extend over the entire stacked cross-section 10 and are flat or flat over the entire stacking cross-section 10. They have two different thicknesses, z. B, 0.75 mm and 0.25 mm, on.
  • the structural plates 22 lie flat against one another along the stacking axis 4. They are connected to each other by means of thermoplastic adhesive layers 23, which extend substantially over the entire stack cross-section 10. Consequently, in each case only the thermoplastic adhesive layer 23 is provided between two successive structural plates 22. An exception is only the connection point between the third and fourth structural plate 22 shown in FIG. 2 from below. Between these structural plates 22, a further potential-separating layer 24 is arranged, which is constructed analogously to the potential-separating layer 20. Due to the potential separation layer 24 is a potential separation between the upper and lower portion of the oxygen-medium guide unit 9.
  • the electric potential in the upper portion of the oxygen-medium guide unit 9 by the potential at the Cathode side 7 of the membrane electrode assembly 5 shown in FIG. 2 determined.
  • the potential in the lower portion of the oxygen-medium guide unit 9 is determined by the cathode side 7 of that membrane-electrode unit 5 adjoining the other side of the oxygen-medium guide unit 9 (not shown).
  • thermoplastic adhesive layers 23 consist of a
  • thermoplastic material which is thermally and electrically insulating and acid-resistant.
  • thermoplastic material which is thermally and electrically insulating and acid-resistant.
  • thermoplastic adhesive layers 23 over a wide range
  • thermoplastic adhesive layers 23 may be made of an electrically conductive thermoplastic.
  • the use of an electrically conductive thermoplastic has the advantage that the current-conducting surface is increased and capacitor effects are avoided. It is thus prevented that build up potentials between the planes defined by the structural plates 22, which can lead to electrolysis esters.
  • thermoplastic used has crystalline behavior, ie the glass transition temperature can be neglected due to the predominantly crystalline structure of the thermoplastic material in terms of its functionality.
  • Thermoplastic material can be used reliably in a temperature range between -40 ° C and 200 ° C.
  • the thermoplastic is a perfluoroalkoxyalkane (PFA), a fluorinated ethylene-propylene (FEP), an aromatic polymer, or a polyfluorocarbon coating such as FEP or PFA
  • Polyimides such as Kapton®, Norton®, StablEdge®, Talmide® or UL®.
  • the structural plates 22 have a plurality of recesses 25, in particular apertures or passage openings.
  • Thermoplastic Kiebe Anlagenen 23 have partially corresponding recesses 26 and holes. Through the recesses 25, a filigree channel structure 27 is formed in the interior of the oxygen-media-guide unit 9, which is sealed in and out by the thermoplastic adhesive layers 23,
  • thermoplastic adhesive layer 23 has at this point a
  • the functional cavity 30 is circumferentially sealed between the structural bends 22 and transversely to the stacking axis 4.
  • the functional cavity 30 forms a portion of a longitudinal channel 33 of the channel structure 27 of the oxygen-media-guiding unit 9.
  • a transverse channel 34 ie a channel which runs perpendicular to the stacking axis 4, is formed z, B. by a narrow, elongated recess 25 on the second in Figure 2 from below structural plate 22, which extends in the sectional plane of Fig. 2.
  • Channel structure 27 many communicating longitudinal 33 and transverse channels 34. A portion of the channels 33, 34 serves for the supply of
  • the reaction gas to be supplied flows,
  • channels 33, 34 Another part of the channels 33, 34 serves to remove formed water vapor and unreacted reaction gases.
  • the structural plates 22 serving as electrode covering plates have a multiplicity of outflow openings, not shown, through which the water vapor and excess reaction gas from the membrane-electrode units 5 can be carried out.
  • part of the channels 33, 34 serve to circulate a coolant.
  • the hydrogen media guide unit 8 is constructed analogously to the oxygen media guide unit 9. It includes in this
  • Embodiment also seven structural plates 22, which are connected by means of thermoplastic adhesive layers 23, which extend substantially over the entire stack cross section 10.
  • a Filigree channel structure 27 is also formed according to the channel structure 27 of the oxygen-medium guide unit 9 inside the hydrogen-medium guide unit 8 by a plurality of recesses 25 in the structural plates 22.
  • Two structural plates 22 serving as electrode cover sheets are provided with inlet openings 35 and outflow openings (not shown).
  • the hydrogen-media-guide unit 8 also has a potential separation layer 24.
  • the structural plates 22 of both media-guiding units 8, 9 are largely mirror-symmetrical to the main axes of the stack cross-section 10. Therefore, the channel structures 27 are the
  • Media guide units 8, 9 also designed mirror-symmetrically to the main axes of the stack cross-section 10.
  • the symmetrical design of the channel structures 27 advantageously results in a uniform thermal, mechanical and electrical load distribution across the stack cross-section 10.
  • a mechanical manufacturing tool costs are reduced.
  • the current generated in the reaction zone of the membrane electrode assembly 5 is discharged at least via the pattern plates 22, the electrode cover plates, directly adjacent to the membrane electrode assembly 5. Is there electrical contact between
  • the current can also be additionally or exclusively dissipated via this other level or levels, resulting in a reduction of the internal resistance.
  • each of the membrane electrode assemblies 5 can be interconnected individually. Therefore no current has to flow off via the media guide unit 8, 9, so that no electrochemical potential can form between the individual levels and so the risk of corrosion is minimized.
  • the fuel cell stack 2 is essentially two
  • the fuel cell stack 2 is made up of a plurality of individual cells 37 a.
  • the successive use is made of a plurality of individual cells 37 a.
  • Single cells 37 each have a common structural plate 22, z, B.
  • the structural sheets 22 are first provided with Ausneh rules 25. Subsequently, the thermoplastic adhesive and sealant is selectively applied to at least one side surface of one of the structural sheets 22 to be joined together.
  • the application of the adhesive and sealant can, for example, be effected by extrusion, lamination, dipping or screen printing or as a hotmelt. Such a procedure is possible because of the thermoplastic as adhesive and sealant repeatedly and without quality and performance losses, for example. Can be activated by heating, Ie mlich the first order and later baking, while he after the
  • Manufacturing a fuel cell stack 2 provides one below described transfer line. At a first station of the transfer line raw sheets are separated from a coli and directed, then the raw sheets are mechanically or at a second station
  • the structural sheets 22 are then selectively coated on at least one side surface by means of lamination, dipping, screen printing or extrusion with thermoplastics. Finally, the coated ones
  • Structured sheets 22 are fed to a stacking device in which they are bonded together under pressure and, for example, inductively introduced process heat.
  • the form of the stacking device ensures that the components produced are plane-parallel

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  • 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 empilement de piles à combustible (2) comprenant plusieurs unités membrane-électrode (5) superposées le long d'un axe d'empilement (4), ainsi que des unités de guidage de substance (8, 9) qui sont disposées entre les unités membrane-électrode (5) le long dudit axe d'empilement (4). Au moins deux éléments structuraux (22) de l'empilement de piles à combustible (2) superposés le long de l'axe d'empilement (4) sont reliés au moyen d'une couche adhésive (23) qui est constituée d'un plastique thermoplastique ou d'un adhésif à deux composants ou davantage et qui s'étend sensiblement sur toute la section transversale d'empilement. Cette invention concerne également un procédé pour produire un tel empilement de piles à combustible (2).
PCT/EP2011/056919 2010-05-12 2011-05-02 Empilement de piles à combustible et son procédé de production WO2011141308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028957A DE102010028957A1 (de) 2010-05-12 2010-05-12 Brennstoffzellenstapel und Verfahren zum Herstellen eines Brennstoffzellenstapels
DE102010028957.4 2010-05-12

Publications (1)

Publication Number Publication Date
WO2011141308A1 true WO2011141308A1 (fr) 2011-11-17

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WO (1) WO2011141308A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102020216101A1 (de) * 2020-12-17 2022-06-23 Robert Bosch Gesellschaft mit beschränkter Haftung Anordnung elektrochemischer Zellen, Fahrzeug umfassend die Anordnung und Verfahren zur Herstellung der Anordnung
FR3120478B1 (fr) * 2021-03-05 2023-06-30 Areva Stockage Denergie Procédé de fabrication d’un séparateur pour réacteur électrochimique et séparateur pour réacteur électrochimique
DE102022212229A1 (de) 2022-11-17 2024-05-23 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Herstellen eines Brennstoffzellenstapels, Brennstoffzellenstapel sowie Vorrichtung
DE102022212228A1 (de) 2022-11-17 2024-05-23 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Herstellen eines Zellenstapels und Zellenstapel

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US5300370A (en) * 1992-11-13 1994-04-05 Ballard Power Systems Inc. Laminated fluid flow field assembly for electrochemical fuel cells
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