EP3931897A1 - Bonding method which can be applied to fuel cells - Google Patents

Bonding method which can be applied to fuel cells

Info

Publication number
EP3931897A1
EP3931897A1 EP20713721.7A EP20713721A EP3931897A1 EP 3931897 A1 EP3931897 A1 EP 3931897A1 EP 20713721 A EP20713721 A EP 20713721A EP 3931897 A1 EP3931897 A1 EP 3931897A1
Authority
EP
European Patent Office
Prior art keywords
setting
adhesive means
slow
setting adhesive
plate
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.)
Pending
Application number
EP20713721.7A
Other languages
German (de)
French (fr)
Inventor
Régis Panozzo
Claire Romand
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.)
Symbio SAS
Original Assignee
Symbio SAS
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 Symbio SAS filed Critical Symbio SAS
Publication of EP3931897A1 publication Critical patent/EP3931897A1/en
Pending 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0286—Processes for forming seals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • 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
    • H01M8/028—Sealing means characterised by their material
    • 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
    • H01M8/2404—Processes or apparatus for grouping fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric 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 present invention relates to the field of fuel cells, and more particularly a bonding process applicable to the assembly of the various constituent plates of such a fuel cell.
  • a hydrogen cell or fuel cell of the proton exchange membrane type or in English: "Proton Exchange Membrane Fuel Cell” or PEMFC makes it possible, in a known manner, to produce electrical energy, by producing by means of an assembly membrane electrode, comprising an electrolyte surrounded by two layers of catalyst, a chemical synthesis reaction of water.
  • Hydrogen Fh is brought to the level of an anode, placed on one side of the membrane. It decomposes, by oxidation: 2 H2 -> 4 FT + 4 e, into two hydrogen protons FT and two electrons e.
  • the two FT protons migrate through the membrane electrode assembly to a cathode, located on the other side of the membrane electrode assembly.
  • the oxygen O2 is supplied, advantageously in the form of air, at the cathode. If an electrical circuit is established between the anode and the cathode, allowing circulation of the electrons e, the latter join the cathode. There, they allow a reduction of the oxygen O2 into two oxygen ions O 2 : O2 + 4 e -> 2 O 2 .
  • the hydrogen protons and the oxygen ions combine, at the cathode level, to form water: 4 FT + 2 O 2 -> 2 FI2O. This reaction is strongly exothermic.
  • the circulation of electrons e- creates electrical energy.
  • a cell Since a cell individually produces only low electrical energy, it is still known to superimpose several tens or hundreds of such cells in a stack. Each anode, respectively cathode, of a cell is then in electrical contact with the cathode, respectively anode, of the next, respectively previous cell. The cells are connected in series. The electrical circuit then connects the first anode / cathode with the last cathode / anode of the stack.
  • An anode, respectively cathode, respectively membrane electrode assembly is integrated in an anode plate, respectively a cathode plate, respectively a membrane plate.
  • a plate comprises its element: anode or cathode or membrane electrode assembly, completed by assembly elements, as well as pipes allowing the supply of reactive gases or the outlet of reaction products.
  • all types of plate anode, cathode, bipolar or membrane, have a similar or at least superimposable shape in order to be able to be stacked. All the plates are pierced with at least one superimposed and opposite lumen so as to form at least one pipe carrying hydrogen so as to supply this gas to the anodes. All the plates are pierced with at least one superimposed and facing lumen so as to form at least one pipe carrying air to supply oxygen to the cathodes and extract the water produced by the chemical reaction. All the plates are still pierced with at least one superimposed and facing lumen so as to form at least one pipe in which a cooling fluid circulates allowing the significant heat produced by the chemical reaction to be removed.
  • the assembly and the seals between an anode plate and an adjacent cathode plate, at the interface between two adjacent cells, or between the two metal plates constituting a bipolar plate are produced by welding in continuous bead, for example laser.
  • Such an embodiment requires a long time, of the order of 30 seconds, to assemble an anode plate and a cathode plate and produce a bipolar plate. This time multiplied by the tens or hundreds of bipolar plates necessary for the production of a fuel cell is hardly compatible with an industrial production. Also it is sought a faster alternative embodiment ensuring assembly and sealing when fabricating a bipolar plate.
  • the seal between an anode plate, respectively cathode, and a membrane plate is achieved by means of a silicone gasket.
  • This interface can also advantageously benefit from the alternative embodiment according to the invention.
  • the principle of the invention consists in replacing the weld or the joint which must be produced plate by plate by a bonding which can advantageously be carried out simultaneously for all the plates.
  • an adhesive means which has the disadvantage of being slow setting.
  • Such a slow setting adhesive means does not guarantee the relative positioning of the plates during assembly operations to form a fuel cell.
  • the main idea of the invention is to use a fast-setting adhesive means together with the slow-setting adhesive means.
  • the quick-setting adhesive means immediately assembles the bonded components, and at least for the time required for the slow-setting adhesive means to dry / set.
  • slow setting is meant a setting taking place between 30 seconds and 24 hours, preferably between 30 seconds and 1 hour, more preferably between 5 and 15 minutes, still more preferably between 30 seconds and 15 minutes and even more preferably between 30 seconds and 1 hour. minute.
  • the slow-setting adhesive means can be configured to have a setting taking place in 30 seconds or more and the quick-setting adhesive means can be configured to have a setting taking place in 10 seconds or less.
  • Fast and / or slow setting is understood to mean setting taking place with or without effort.
  • the invention relates to a method for bonding a first component with a second component, comprising the following steps: depositing on the first component and / or on the second component an adhesive means of a first type, from among a means slow-setting adhesive or a fast-setting adhesive means, - depositing on the first component and / or on the second component an adhesive means of a second type, different from the first type, from among a slow-setting adhesive means or a adhesive medium to rapid setting, - bringing the two components into contact, - pressing and - setting of the slow-setting adhesive means.
  • the bonding process includes the provision step
  • the slow setting adhesive medium is configured to have a slower setting than a rapid setting of the quick setting adhesive medium.
  • the quick-setting adhesive medium has set or dried while the slow-set medium has not yet set or dried. Accordingly, at that first given point of time, the quick-setting adhesive means secures while the slow-setting adhesive means does not yet provide securing. At a second time point later than the first time point, the quick-setting adhesive means and the slow-setting adhesive means will both have set or dried and therefore secure both.
  • the bonding process comprises the provision step:
  • the slow-setting adhesive medium is configured to have a slower setting than a rapid setting of the rapid-setting adhesive medium
  • the slow-setting adhesive means being configured to have a setting in 30 seconds or more and the quick-setting adhesive means is configured to have a setting in 10 seconds or less.
  • a fast-setting adhesive means which is configured to have a setting taking place in less than 10 seconds, preferably less than 5 seconds and even more preferably less than 1 second
  • a slow-setting adhesive means which is configured to have a setting taking place between 30 seconds and 24 hours, preferably between 30 seconds and 1 hour, again preferably between 5 and 15 minutes, still preferably between 30 seconds and 15 minutes and again more preferably between 30 seconds and 1 minute. More particularly, the method of bonding a first component with a second component can comprise the following steps:
  • the slow-setting adhesive means is deposited along at least one continuous and closed contour
  • the slow-setting adhesive means comprises a slow-setting adhesive and / or a surface support covered on both sides with a slow-setting adhesive, the slow-setting adhesive preferably being of the thermal drying polymer type,
  • the rapid-setting adhesive means is deposited at at least two points, the rapid-setting adhesive means is of the type with activation by pressing and instantaneous setting,
  • the invention also relates to an assembly obtained by means of such a bonding process.
  • the invention also relates to a method of assembling a bipolar plate for a fuel cell, comprising an anode plate and a cathode plate, substantially superimposable, applying such a bonding process to assemble the anode plate with the cathode plate.
  • the anode plate and the cathode plate are pierced with opposing lights, so as to form passing gaseous reagent pipes and the slow-setting adhesive means is deposited according to a continuous and closed contour surrounding each of the openings and according to a continuous and closed contour on the periphery of the plates.
  • the invention also relates to a bipolar plate obtained by means of such an assembly process.
  • the invention also relates to a method of assembling a fuel cell, comprising a stack periodically alternating a bipolar plate and a membrane plate, the bipolar plates all being oriented in the same direction, applying such a bonding method to assemble a membrane plate.
  • bipolar plate with a membrane plate Particular characteristics or embodiments, which can be used alone or in combination, are:
  • a bipolar plate and a membrane plate are pierced with facing lights, so as to form gaseous reagent pipes and at least one through-cooling fluid pipe and the slow-setting adhesive means is deposited in a continuous and closed contour surrounding each one lights and according to a continuous contour and closed on the periphery of the plates.
  • the invention also relates to a fuel cell obtained by means of such an assembly method.
  • Figures 1 and 2 show in profile view, a bonding between two elements, respectively during contact and after pressing
  • FIG. 3 represents, in perspective view, a bipolar plate
  • FIG. 4 represents, in perspective view, a membrane plate
  • FIG. 5 shows, in profile view, an assembly between a bipolar plate and a membrane plate
  • Figure 6 shows, in front view, a half plate
  • FIG. 7 represents, in perspective view, a fuel cell.
  • a method of bonding a first component 1 with a second component 2 is illustrated.
  • a slow-setting adhesive means 3 is deposited on the first component 1.
  • slow setting 3 can also be deposited on the second component 2.
  • part of the slow setting adhesive means 3 being deposited on the first component 1 and part of the slow setting adhesive means 3 being deposited on the second component 2.
  • a slow-setting adhesive means 3 is durable but has the drawback of requiring a setting time, during which the assembly of the two components 1, 2 cannot be moved without risk of relative displacement.
  • a quick-setting adhesive means 4 is deposited on the first component 1.
  • the rapid-setting adhesive means 4 can also be deposited on the second component 2.
  • the quick-setting adhesive means 4 makes it possible to ensure the immobilization of the first component 1 relative to the second component 2 at least until the setting slow-setting adhesive means 3, thus allowing the assembly to be moved more quickly.
  • the different deposits of slow-setting adhesive means 3 and quick-setting 4 can be made in any sequence or even, at least partially, simultaneously.
  • FIG. 2 illustrates the result. gluing after pressing.
  • the first purpose of the slow-setting adhesive means 3 is to achieve the bonding of the component 1 with the component 2. It can also advantageously be intended to ensure a seal between the two components 1, 2. Also according to another characteristic, the adhesive means slow setting 3 is deposited along at least one continuous contour. This continuous contour is advantageously closed in a loop, so as to be able to surround an opening to be sealed.
  • the slow-setting adhesive means 3 comprises a slow-setting adhesive.
  • it comprises a double-sided adhesive, or a surface support covered on both sides with a slow-setting adhesive.
  • the slow-setting glue can be solid, liquid or pasty, applied by brush, syringe, screen printing, transfer, spray or any other means.
  • the slow-setting glue is preferably of the polymer type.
  • This polymer adhesive is advantageously of the thermal setting type.
  • heating for example by steaming, makes it possible to set the slow-setting adhesive means 2.
  • Such an embodiment of the setting is advantageous, in relation to welding, in that it allows a very large number of bonding to be carried out simultaneously, for example in the case of a stack of components.
  • a setting adhesive caused by any means or energy. This is the case with a photosensitive adhesive, the setting of which is triggered by light radiation, such as UV lighting. A temporal capture is also possible.
  • the rapid-setting adhesive means 4 is intended to immobilize the first component 1 relative to the second component 2. Also, its deposition can be punctual, and for example, limited to at least two points.
  • the quick-setting adhesive medium 4 includes a quick-setting glue. Alternatively or in addition, it includes a double-sided adhesive, or a surface support covered on both sides with a quick-setting adhesive.
  • the fast-setting glue can be solid, liquid or pasty, deposited with a brush, a syringe, by screen printing, by transfer, by spray or any other means.
  • the quick-setting glue is preferably of the type with activation by pressing and instantaneous setting.
  • the sticky active principle is contained in microcapsules which are broken by pressing the two components 1, 2. The active principle dries immediately after its release by rupture of the microcapsules.
  • the invention also relates to an assembly obtained by means of such a bonding process.
  • the above bonding process can be applied to the manufacture of a fuel cell 7 in at least two interfaces: for the assembly of a bipolar plate 6 and for the assembly of a bipolar plate with a membrane plate 15.
  • a bipolar plate 6 for a fuel cell 7 comprises an anode plate 8 and a cathode plate 9, substantially superimposable and assembled back to back.
  • a fuel cell is composed of a stack of cells each comprising a cathode plate 9, a membrane plate 15 comprising a membrane electrode assembly 5 and an anode plate 8, then the periodic pattern is repeated with a new cathode plate 9.
  • the plate cathode 9 and anode plate 8 are both metallic. It is therefore advantageous to pre-assemble together the anode plate 8 of one cell with the cathode plate 9 of the immediately following cell. This pre-assembly is called bipolar plate 6.
  • Such a bipolar plate 6 is shown in Figure 3.
  • This pre-assembly advantageously applies a bonding process according to one of the previous embodiments to assemble an anode plate 8 with a cathode plate 9.
  • the pre-assembly can be handled without fear to typically produce a fuel cell 7.
  • the grip of the means slow-setting adhesive 3 can advantageously be delayed to be carried out at the same time as the setting of other assemblies, in a single operation.
  • the anode plate 8 and the cathode plate 9 are pierced with openings 10, 1 1 facing each other, so as to form passing gaseous reagent pipes, perpendicular to the plane of the plates 8, 9.
  • the lumen 10 forms a pipe in which air circulates
  • the lumen 11 forms a pipe in which hydrogen circulates.
  • conduits 21 connecting the lumen 10 to the anode proper, located at the center of the anode plate 8.
  • conduits 22 connecting the lumen 11 to the cathode. proper, located in the center of the cathode plate 9.
  • a first lumen 10, located to the left of the anode plate 8 allows the entry of air to the anode to supply the reaction with oxygen
  • a second lumen 10, located to the right of the anode plate 8 allows the exit and recycling the unused air and the water produced by the reaction.
  • a first light 1 1, located to the right of the cathode plate 9 allows the entry of hydrogen to the cathode to supply the reaction with hydrogen
  • a second light 11, located to the left of the cathode plate 9 allows the exit and recycling unused hydrogen.
  • Lights 10 do not communicate with the cathode.
  • Lights 1 1 do not communicate with the anode.
  • the slow setting adhesive means 3 is used to achieve these seals. For this it is deposited according to several continuous and closed contours. Thus, as illustrated in Figure 6 for a symmetrical half plate, considering the contours shown in solid lines, an outline 12 surrounds a light 10, an outline 13 surrounds a light 1 1, so that the gas circulating in the lumen 10, 11 can only exit through the dedicated pipes 21, 22.
  • Another seal is provided on the common periphery of the plates 8, 9 according to a continuous and closed contour 14 arranged along the periphery of the plates 8 , 9.
  • the invention also relates to a bipolar plate 6 obtained by such an assembly process.
  • a fuel cell 7 comprises a stack periodically alternating a bipolar plate 6 and a membrane plate 15.
  • a bipolar plate 6 is arranged, for example anode plate 8 upwards, in order to provide an anode to the cell.
  • a membrane plate 15, incorporating a membrane electrode assembly 5, is then placed above, in order to provide a membrane electrode assembly to the cell.
  • a new bipolar plate 6 is placed above, oriented in the same direction, that is to say the cathode plate 9 downwards, in order to supply a cathode to the cell.
  • the upper bipolar plate 6 comprises above, an anode for the next cell.
  • the two end plates of the stack are different to complete the stack and allow the connection of the networks (air, hydrogen and coolant) to the pipes.
  • bipolar plates 6 are already pre-assembled.
  • the assembly should be made between a bipolar plate 6 (anode side) and a membrane plate 15 as well as between a membrane plate 15 and a bipolar plate 6 (cathode side).
  • it can advantageously be applied a bonding method according to one of the previous embodiments to assemble a bipolar plate 6 with a membrane plate 15.
  • FIG. 5 shows in profile view, the interface between a membrane plate 15 and a bipolar plate 6.
  • a membrane electrode assembly 5 In the center of the membrane plate 15 is integrated a membrane electrode assembly 5.
  • the latter comprises, on either side, two layers 23 providing the functions of diffusion of the reactive gases and of catalyst.
  • the bipolar plate 6 and the membrane plate 15 are pierced with openings 10, 11 facing each other, so as to form passing gaseous reagent pipes. and are also pierced with openings 16 facing each other, so as to form through cooling fluid pipes.
  • the lumen 16 forms a pipe in which circulates a cooling fluid. Said fluid remains confined to window 16 and must not spread into the rest of plate 6, 15.
  • the slow setting adhesive means 3 is used to achieve these seals. For this it is deposited according to several continuous and closed contours. Thus, as illustrated in FIG. 6 for a symmetrical half-plate, considering the contours shown in dotted lines, an outline 17 surrounds a light 10, an outline 18 surrounds a light 11 and an outline 19 surrounds a light 16. A another seal is provided on the common periphery of the plates 6, 15 according to a continuous and closed contour 20 disposed along the periphery of the plates 6, 15.
  • the invention also relates to a fuel cell 7 obtained by means of such an assembly method.
  • the invention has been illustrated and described in detail in the drawings and the preceding description. This should be considered as illustrative and given by way of example and not as limiting the invention to this description alone. Many variant embodiments are possible.

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

Abstract

The invention relates to a method for bonding a first component (1) to a second component (2), involving the following steps: - depositing, onto the first component (1) and/or onto the second component (2), an adhesive means of a first type selected from a slow-setting adhesive means (3) or a quick-setting adhesive means (4), - depositing, onto the first component (1) and/or onto the second component (2), an adhesive means of a second type which differs from the first type, selected from a slow-setting adhesive means (3) or a quick-setting adhesive means (4), - bringing the two components (1, 2) into contact, - pressing, and - setting the slow-setting adhesive means (3). The invention can be applied in the assembly of a bipolar plate (6). The invention can be applied in the assembly of a fuel cell (7).

Description

PROCÉDÉ DE COLLAGE - APPLICATION AUX PILES À COMBUSTIBLES BONDING PROCESS - APPLICATION TO FUEL CELLS
DESCRIPTION La présente invention le domaine des piles à combustible, et plus particulièrement un procédé de collage applicable à l’assemblage des différentes plaques constitutives d’une telle pile à combustible. DESCRIPTION The present invention relates to the field of fuel cells, and more particularly a bonding process applicable to the assembly of the various constituent plates of such a fuel cell.
Technique antérieure Prior art
Une pile à hydrogène ou pile à combustible de type à membrane échangeuse de proton ou en anglais : « Proton Exchange Membrane Fuel Cell » ou PEMFC permet, de manière connue, de produire de l’énergie électrique, en réalisant au moyen d’un assemblage membrane électrode, comprenant un électrolyte entouré de deux couches de catalyseur, une réaction chimique de synthèse de l’eau. De l’hydrogène Fh est apporté au niveau d’une anode, disposée d’un côté de la membrane. Il se décompose, par une oxydation : 2 H2 -> 4 FT + 4 e , en deux protons hydrogène FT et en deux électrons e . Les deux protons FT migrent au travers de l’assemblage membrane électrode jusqu’à une cathode, disposée de l’autre côté de l’assemblage membrane électrode. L’oxygène O2 est apporté, avantageusement sous forme d’air, au niveau de la cathode. Si un circuit électrique est établi entre l’anode et la cathode, permettant une circulation des électrons e , ceux-ci rejoignent la cathode. Là, ils permettent une réduction de l’oxygène O2 en deux ions oxygène O2 : O2 + 4 e -> 2 O2 . Les protons hydrogène et les ions oxygène se combinent, au niveau de la cathode, pour former de l’eau : 4 FT + 2 O2 -> 2 FI2O. Cette réaction est fortement exothermique. La circulation des électrons e- crée l’énergie électrique. A hydrogen cell or fuel cell of the proton exchange membrane type or in English: "Proton Exchange Membrane Fuel Cell" or PEMFC makes it possible, in a known manner, to produce electrical energy, by producing by means of an assembly membrane electrode, comprising an electrolyte surrounded by two layers of catalyst, a chemical synthesis reaction of water. Hydrogen Fh is brought to the level of an anode, placed on one side of the membrane. It decomposes, by oxidation: 2 H2 -> 4 FT + 4 e, into two hydrogen protons FT and two electrons e. The two FT protons migrate through the membrane electrode assembly to a cathode, located on the other side of the membrane electrode assembly. The oxygen O2 is supplied, advantageously in the form of air, at the cathode. If an electrical circuit is established between the anode and the cathode, allowing circulation of the electrons e, the latter join the cathode. There, they allow a reduction of the oxygen O2 into two oxygen ions O 2 : O2 + 4 e -> 2 O 2 . The hydrogen protons and the oxygen ions combine, at the cathode level, to form water: 4 FT + 2 O 2 -> 2 FI2O. This reaction is strongly exothermic. The circulation of electrons e- creates electrical energy.
II est connu pour réaliser une cellule de pile à combustible de superposer une anode, avantageusement métallique, un assemblage membrane électrode et une cathode, avantageusement métallique, avantageusement sous forme de couches minces. It is known to produce a fuel cell cell to superimpose an anode, advantageously metallic, a membrane electrode assembly and a cathode, advantageously metallic, advantageously in the form of thin layers.
Une cellule ne produisant individuellement qu’une faible énergie électrique, il est encore connu de superposer plusieurs dizaines ou centaines de telles cellules dans un empilage. Chaque anode, respectivement cathode, d’une cellule est alors en contact électrique avec la cathode, respectivement anode, de la cellule suivante, respectivement précédente. Les cellules sont connectées en série. Le circuit électrique relie alors la première anode/cathode avec la dernière cathode/anode de l’empilage. Une anode, respectivement cathode, respectivement assemblage membrane électrode, est intégrée dans une plaque anode, respectivement une plaque cathode, respectivement une plaque membrane. Une plaque comprend son élément : anode ou cathode ou assemblage membrane électrode, complété par des éléments d’assemblage, ainsi que des canalisations permettant l’amenée des gaz réactifs ou la sortie des produits de réaction. Since a cell individually produces only low electrical energy, it is still known to superimpose several tens or hundreds of such cells in a stack. Each anode, respectively cathode, of a cell is then in electrical contact with the cathode, respectively anode, of the next, respectively previous cell. The cells are connected in series. The electrical circuit then connects the first anode / cathode with the last cathode / anode of the stack. An anode, respectively cathode, respectively membrane electrode assembly, is integrated in an anode plate, respectively a cathode plate, respectively a membrane plate. A plate comprises its element: anode or cathode or membrane electrode assembly, completed by assembly elements, as well as pipes allowing the supply of reactive gases or the outlet of reaction products.
Ainsi, tous les types de plaque : anode, cathode, bipolaire ou membrane, présentent une forme similaire ou du moins superposable afin de pouvoir être empilées. Toutes les plaques sont percées d’au moins une lumière superposée et en regard de manière à former au moins une canalisation transportant de l’hydrogène de manière à apporter ce gaz aux anodes. Toutes les plaques sont percées d’au moins une lumière superposée et en regard de manière à former au moins une canalisation transportant de l’air de manière à apporter de l’oxygène aux cathodes et extraire l’eau produite par la réaction chimique. Toutes les plaques sont encore percées d’au moins une lumière superposée et en regard de manière à former au moins une canalisation dans laquelle circule un fluide de refroidissement permettant d’évacuer la chaleur importante produite par la réaction chimique. Thus, all types of plate: anode, cathode, bipolar or membrane, have a similar or at least superimposable shape in order to be able to be stacked. All the plates are pierced with at least one superimposed and opposite lumen so as to form at least one pipe carrying hydrogen so as to supply this gas to the anodes. All the plates are pierced with at least one superimposed and facing lumen so as to form at least one pipe carrying air to supply oxygen to the cathodes and extract the water produced by the chemical reaction. All the plates are still pierced with at least one superimposed and facing lumen so as to form at least one pipe in which a cooling fluid circulates allowing the significant heat produced by the chemical reaction to be removed.
Il est encore connu de pré assembler dos à dos une plaque anode et une plaque cathode, pour obtenir une plaque bipolaire. Une pile peut ensuite être assemblée en empilant périodiquement une plaque bipolaire et une plaque membrane. Si toutes les plaques bipolaires sont disposées dans le même sens, on retrouve bien la succession périodique : anode, assemblage membrane électrode, cathode, anode, etc... Seules les deux extrémités de la pile diffèrent en ce qu’elles comportent une unique anode ou cathode ainsi que des moyens de connexion aux différents gaz réactifs et fluide de refroidissement. It is also known practice to pre-assemble back to back an anode plate and a cathode plate, to obtain a bipolar plate. A stack can then be assembled by periodically stacking a bipolar plate and a membrane plate. If all the bipolar plates are arranged in the same direction, we find the periodic succession: anode, membrane electrode assembly, cathode, anode, etc ... Only the two ends of the cell differ in that they have a single anode or cathode as well as means of connection to the various reactive gases and cooling fluid.
Afin de réaliser les différentes canalisations : hydrogène, air, fluide de refroidissement, il convient de réaliser des étanchéités, au gaz et/ou au liquide, entre les différentes plaques. In order to carry out the different pipes: hydrogen, air, cooling fluid, it is necessary to make seals, gas and / or liquid, between the different plates.
Selon l’art antérieur, l’assemblage et les étanchéités entre une plaque anode et une plaque cathode adjacentes, à l’interface entre deux cellules adjacentes, soit entre les deux plaques métalliques constitutives d’une plaque bipolaire, sont réalisées par une soudure en cordon continu, par exemple au laser. Un tel mode de réalisation nécessite un temps important, de l’ordre de 30 secondes pour assembler une plaque anode et une plaque cathode et réaliser une plaque bipolaire. Ce temps multiplié par les dizaines ou centaines de plaques bipolaires nécessaires à la réalisation d’une pile à combustible est peu compatible d’une réalisation industrielle. Aussi il est recherché un mode de réalisation alternatif plus rapide assurant l’assemblage et l’étanchéité lors de la fabrication d’une plaque bipolaire. According to the prior art, the assembly and the seals between an anode plate and an adjacent cathode plate, at the interface between two adjacent cells, or between the two metal plates constituting a bipolar plate, are produced by welding in continuous bead, for example laser. Such an embodiment requires a long time, of the order of 30 seconds, to assemble an anode plate and a cathode plate and produce a bipolar plate. This time multiplied by the tens or hundreds of bipolar plates necessary for the production of a fuel cell is hardly compatible with an industrial production. Also it is sought a faster alternative embodiment ensuring assembly and sealing when fabricating a bipolar plate.
Selon l’art antérieur, l’étanchéité, entre une plaque anode, respectivement cathode, et une plaque membrane, est réalisé au moyen d’un joint silicone. Cette interface peut aussi avantageusement bénéficier du mode de réalisation alternatif selon l’invention. According to the prior art, the seal between an anode plate, respectively cathode, and a membrane plate, is achieved by means of a silicone gasket. This interface can also advantageously benefit from the alternative embodiment according to the invention.
Résumé de l'invention Summary of the invention
Le principe de l’invention consiste à remplacer la soudure ou le joint qui doit être réalisée plaque par plaque par un collage qui peut avantageusement être réalisé simultanément pour toutes les plaques. Cependant pour obtenir un collage qui garantisse une tenue dans le temps compatible avec la durée de vie d’une pile à combustible, il est nécessaire d’employer un moyen adhésif qui présente l’inconvénient d’être à prise lente. Un tel moyen adhésif à prise lente ne permet pas de garantir le positionnement relatif des plaques pendant les opérations d’assemblage pour former une pile à combustible. Aussi l’idée maîtresse de l’invention consiste à utiliser un moyen adhésif à prise rapide conjointement au moyen adhésif à prise lente. Ainsi, le moyen adhésif à prise rapide assure immédiatement l’assemblage des composants collés, et au moins durant le temps nécessaire au moyen adhésif à prise lente pour sécher/prendre. The principle of the invention consists in replacing the weld or the joint which must be produced plate by plate by a bonding which can advantageously be carried out simultaneously for all the plates. However, to obtain a bond which guarantees a resistance over time compatible with the life of a fuel cell, it is necessary to use an adhesive means which has the disadvantage of being slow setting. Such a slow setting adhesive means does not guarantee the relative positioning of the plates during assembly operations to form a fuel cell. Also the main idea of the invention is to use a fast-setting adhesive means together with the slow-setting adhesive means. Thus, the quick-setting adhesive means immediately assembles the bonded components, and at least for the time required for the slow-setting adhesive means to dry / set.
Par exemple on peut comprendre par prise rapide, d’une colle sous effort ou non, une prise s’effectuant en moins de 10 secondes, préférentiellement moins de 5 secondes et encore préférentiellement moins de 1 seconde. On entend par prise lente une prise s’effectuant entre 30 secondes et 24 heures, préférentiellement entre 30 secondes et 1 heure, encore préférentiellement entre 5 et 15 minutes, encore préférentiellement entre 30 secondes et 15 minutes et encore plus préférentiellement entre 30 secondes et 1 minute. For example, by rapid setting, of a glue under stress or not, one can understand a setting taking place in less than 10 seconds, preferably less than 5 seconds and even more preferably less than 1 second. By slow setting is meant a setting taking place between 30 seconds and 24 hours, preferably between 30 seconds and 1 hour, more preferably between 5 and 15 minutes, still more preferably between 30 seconds and 15 minutes and even more preferably between 30 seconds and 1 hour. minute.
Plus particulièrement, le moyen adhésif à prise lente peut être configuré pour avoir une prise s’effectuant en 30 secondes ou plus et le moyen adhésif à prise rapide peut être configuré pour avoir une prise s’effectuant en 10 secondes ou moins. On entend par la prise rapide et/ou lente une prise s’effectuant sous effort ou non. More particularly, the slow-setting adhesive means can be configured to have a setting taking place in 30 seconds or more and the quick-setting adhesive means can be configured to have a setting taking place in 10 seconds or less. Fast and / or slow setting is understood to mean setting taking place with or without effort.
L’invention concerne un procédé de collage d’un premier composant avec un deuxième composant, comprenant les étapes suivantes : - dépôt sur le premier composant et/ou sur le deuxième composant d’un moyen adhésif d’un premier type, parmi un moyen adhésif à prise lente ou un moyen adhésif à prise rapide, - dépôt sur le premier composant et/ou sur le deuxième composant d’un moyen adhésif d’un deuxième type, différent du premier type, parmi un moyen adhésif à prise lente ou un moyen adhésif à prise rapide, - mise en contact des deux composants, - pressage et - prise du moyen adhésif à prise lente. The invention relates to a method for bonding a first component with a second component, comprising the following steps: depositing on the first component and / or on the second component an adhesive means of a first type, from among a means slow-setting adhesive or a fast-setting adhesive means, - depositing on the first component and / or on the second component an adhesive means of a second type, different from the first type, from among a slow-setting adhesive means or a adhesive medium to rapid setting, - bringing the two components into contact, - pressing and - setting of the slow-setting adhesive means.
Le procédé de collage comprend l’étape de mise à disposition The bonding process includes the provision step
- d’un moyen adhésif à prise lente et - a slow setting adhesive and
- d’un moyen adhésif à prise rapide - a quick-setting adhesive
dans lequel in which
le moyen adhésif à prise lente est configuré pour avoir une prise plus lente qu’une prise rapide du moyen adhésif à prise rapide. the slow setting adhesive medium is configured to have a slower setting than a rapid setting of the quick setting adhesive medium.
Autrement dit, à un premier point de temps donné durant le procédé de collage, le moyen adhésif à prise rapide a pris ou séché pendant que le moyen à prise lente n’a pas encore pris ou séché. En conséquence, à ce premier point de temps donné, le moyen adhésif à prise rapide assure une fixation pendant que le moyen adhésif à prise lente n’assure pas encore une fixation. A un deuxième point de temps plus tard que le premier point de temps, le moyen adhésif à prise rapide et le moyen adhésif à prise lente auront pris ou séché tous les deux et en conséquence assurent une fixation tous les deux. In other words, at a first given time point during the gluing process, the quick-setting adhesive medium has set or dried while the slow-set medium has not yet set or dried. Accordingly, at that first given point of time, the quick-setting adhesive means secures while the slow-setting adhesive means does not yet provide securing. At a second time point later than the first time point, the quick-setting adhesive means and the slow-setting adhesive means will both have set or dried and therefore secure both.
Avantageusement, le procédé de collage comprend l’étape de mise à disposition : Advantageously, the bonding process comprises the provision step:
- d’un moyen adhésif à prise lente et - a slow setting adhesive and
- d’un moyen adhésif à prise rapide - a quick-setting adhesive
dans lequel in which
le moyen adhésif à prise lente est configuré pour avoir une prise plus lente qu’une prise rapide du moyen adhésif à prise rapide et the slow-setting adhesive medium is configured to have a slower setting than a rapid setting of the rapid-setting adhesive medium and
le moyen adhésif à prise lente étant configuré pour avoir une prise s’effectuant en 30 secondes ou plus et le moyen adhésif à prise rapide est configuré pour avoir une prise s’effectuant en 10 secondes ou moins. the slow-setting adhesive means being configured to have a setting in 30 seconds or more and the quick-setting adhesive means is configured to have a setting in 10 seconds or less.
Il est également envisageable d’utiliser It is also possible to use
- un moyen adhésif à prise rapide qui est configuré pour avoir une prise s’effectuant en moins de 10 secondes, préférentiellement moins de 5 secondes et encore préférentiellement moins de 1 seconde - a fast-setting adhesive means which is configured to have a setting taking place in less than 10 seconds, preferably less than 5 seconds and even more preferably less than 1 second
en combinaison avec in combination with
- un moyen adhésif à prise lente qui est configuré pour avoir une prise s’effectuant entre 30 secondes et 24 heures, préférentiellement entre 30 secondes et 1 heure, encore préférentiellement entre 5 et 15 minutes, encore préférentiellement entre 30 secondes et 15 minutes et encore plus préférentiellement entre 30 secondes et 1 minute. Plus particulièrement, le procédé de collage d’un premier composant avec un deuxième composant peut comprendre les étapes suivantes : - a slow-setting adhesive means which is configured to have a setting taking place between 30 seconds and 24 hours, preferably between 30 seconds and 1 hour, again preferably between 5 and 15 minutes, still preferably between 30 seconds and 15 minutes and again more preferably between 30 seconds and 1 minute. More particularly, the method of bonding a first component with a second component can comprise the following steps:
- dépôt sur le premier composant et/ou sur le deuxième composant d’un moyen adhésif à prise lente et - deposit on the first component and / or on the second component of a slow-setting adhesive means and
- dépôt sur le premier composant et/ou sur le deuxième composant d’un moyen adhésif à prise rapide. - deposit on the first component and / or on the second component of a quick-setting adhesive means.
Des caractéristiques ou des modes de réalisation particuliers, utilisables seuls ou en combinaison, sont : Particular characteristics or embodiments, which can be used alone or in combination, are:
le moyen adhésif à prise lente est déposé selon au moins un contour continu et fermé, the slow-setting adhesive means is deposited along at least one continuous and closed contour,
le moyen adhésif à prise lente comprend une colle à prise lente et/ou un support surfacique recouvert sur ses deux faces d’une colle à prise lente, la colle à prise lente étant préférentiellement du type polymère à séchage thermique, the slow-setting adhesive means comprises a slow-setting adhesive and / or a surface support covered on both sides with a slow-setting adhesive, the slow-setting adhesive preferably being of the thermal drying polymer type,
le moyen adhésif à prise rapide est déposé selon au moins deux points, le moyen adhésif à prise rapide est du type à activation par pressage et à prise instantanée, the rapid-setting adhesive means is deposited at at least two points, the rapid-setting adhesive means is of the type with activation by pressing and instantaneous setting,
L’invention concerne encore un assemblage obtenu au moyen d’un tel procédé de collage. The invention also relates to an assembly obtained by means of such a bonding process.
L’invention concerne encore un procédé d’assemblage d’une plaque bipolaire pour pile à combustible, comprenant une plaque anode et une plaque cathode, sensiblement superposables, appliquant un tel procédé de collage pour assembler la plaque anode avec la plaque cathode. The invention also relates to a method of assembling a bipolar plate for a fuel cell, comprising an anode plate and a cathode plate, substantially superimposable, applying such a bonding process to assemble the anode plate with the cathode plate.
Des caractéristiques ou des modes de réalisation particuliers, utilisables seuls ou en combinaison, sont : Particular characteristics or embodiments, which can be used alone or in combination, are:
la plaque anode et la plaque cathode sont percées de lumières en regard, de manière à former des canalisations de réactif gazeux traversantes et le moyen adhésif à prise lente est déposé selon un contour continu et fermé entourant chacune des lumières et selon un contour continu et fermé en périphérie des plaques. the anode plate and the cathode plate are pierced with opposing lights, so as to form passing gaseous reagent pipes and the slow-setting adhesive means is deposited according to a continuous and closed contour surrounding each of the openings and according to a continuous and closed contour on the periphery of the plates.
L’invention concerne encore une plaque bipolaire obtenue au moyen d’un tel procédé d’assemblage. The invention also relates to a bipolar plate obtained by means of such an assembly process.
L’invention concerne encore un procédé d’assemblage d’une pile à combustible, comprenant un empilement alternant périodiquement une plaque bipolaire et une plaque membrane, les plaques bipolaires étant toutes orientées dans le même sens, appliquant un tel procédé de collage pour assembler une plaque bipolaire avec une plaque membrane. Des caractéristiques ou des modes de réalisation particuliers, utilisables seuls ou en combinaison, sont : The invention also relates to a method of assembling a fuel cell, comprising a stack periodically alternating a bipolar plate and a membrane plate, the bipolar plates all being oriented in the same direction, applying such a bonding method to assemble a membrane plate. bipolar plate with a membrane plate. Particular characteristics or embodiments, which can be used alone or in combination, are:
une plaque bipolaire et une plaque membrane sont percées de lumières en regard, de manière à former des canalisations de réactif gazeux et au moins une canalisation de fluide de refroidissement traversantes et le moyen adhésif à prise lente est déposé selon un contour continu et fermé entourant chacune des lumières et selon un contour continu et fermé en périphérie des plaques. a bipolar plate and a membrane plate are pierced with facing lights, so as to form gaseous reagent pipes and at least one through-cooling fluid pipe and the slow-setting adhesive means is deposited in a continuous and closed contour surrounding each one lights and according to a continuous contour and closed on the periphery of the plates.
L’invention concerne encore une pile à combustible obtenue au moyen d’un tel procédé d’assemblage. The invention also relates to a fuel cell obtained by means of such an assembly method.
Brève description des dessins Brief description of the drawings
L’invention sera mieux comprise à la lecture de la description qui suit, faite uniquement à titre d’exemple, et en référence aux figures en annexe dans lesquelles : The invention will be better understood on reading the following description, given purely by way of example, and with reference to the appended figures in which:
Les figures 1 et 2 représentent en vue de profil, un collage entre deux éléments, respectivement lors de la mise en contact et après pressage, Figures 1 and 2 show in profile view, a bonding between two elements, respectively during contact and after pressing,
La figure 3 représente, en vue perspective, une plaque bipolaire, FIG. 3 represents, in perspective view, a bipolar plate,
La figure 4 représente, en vue perspective, une plaque membrane,FIG. 4 represents, in perspective view, a membrane plate,
La figure 5 représente, en vue de profil, un assemblage entre une plaque bipolaire et une plaque membrane, FIG. 5 shows, in profile view, an assembly between a bipolar plate and a membrane plate,
La figure 6 représente, en vue de face, une demi plaque, Figure 6 shows, in front view, a half plate,
La figure 7 représente, en vue perspective, une pile à combustible. FIG. 7 represents, in perspective view, a fuel cell.
Description des modes de réalisation Description of embodiments
En référence à la figure 1 , est illustré un procédé de collage d’un premier composant 1 avec un deuxième composant 2. Pour réaliser ce collage, il est déposé sur le premier composant 1 un moyen adhésif à prise lente 3. Le moyen adhésif à prise lente 3 peut aussi être déposé sur le deuxième composant 2. Alternativement il est possible de doubler, une partie du moyen adhésif à prise lente 3 étant déposée sur le premier composant 1 et une partie du moyen adhésif à prise lente 3 étant déposé sur le deuxième composant 2. Un moyen adhésif à prise lente 3 est durable mais présente l’inconvénient de nécessiter un temps de prise, pendant lequel l’assemblage des deux composants 1 , 2 ne peut être bougé sans risque de déplacement relatif. With reference to FIG. 1, a method of bonding a first component 1 with a second component 2 is illustrated. To achieve this bonding, a slow-setting adhesive means 3 is deposited on the first component 1. slow setting 3 can also be deposited on the second component 2. Alternatively it is possible to double, part of the slow setting adhesive means 3 being deposited on the first component 1 and part of the slow setting adhesive means 3 being deposited on the second component 2. A slow-setting adhesive means 3 is durable but has the drawback of requiring a setting time, during which the assembly of the two components 1, 2 cannot be moved without risk of relative displacement.
Aussi, pour pallier cet inconvénient, il est déposé sur le premier composant 1 un moyen adhésif à prise rapide 4. Le moyen adhésif à prise rapide 4 peut aussi être déposé sur le deuxième composant 2. Alternativement il est possible de doubler, une partie du moyen adhésif à prise rapide 4 étant déposé sur le premier composant 1 et une partie du moyen adhésif à prise rapide 4 étant déposé sur le deuxième composant 2. Le moyen adhésif à prise rapide 4 permet d’assurer l’immobilisation du premier composant 1 relativement au deuxième composant 2 au moins jusqu’à la prise du moyen adhésif à prise lente 3, permettant ainsi plus rapidement de bouger l’assemblage. Les différents dépôts de moyen adhésif à prise lente 3 et à prise rapide 4 peuvent être réalisés en une séquence quelconque ou même, au moins partiellement, simultanément. Also, to overcome this drawback, a quick-setting adhesive means 4 is deposited on the first component 1. The rapid-setting adhesive means 4 can also be deposited on the second component 2. Alternatively, it is possible to double part of the fast-setting adhesive means 4 being deposited on the first component 1 and part of the quick-setting adhesive means 4 being deposited on the second component 2. The quick-setting adhesive means 4 makes it possible to ensure the immobilization of the first component 1 relative to the second component 2 at least until the setting slow-setting adhesive means 3, thus allowing the assembly to be moved more quickly. The different deposits of slow-setting adhesive means 3 and quick-setting 4 can be made in any sequence or even, at least partially, simultaneously.
Une fois tous les dépôts de moyen adhésif réalisés, le procédé de collage se poursuit avec une mise en contact des deux composants 1 , 2, leur face respective présentant les dépôts de moyens adhésifs 3, 4 se faisant face, suivie d’un pressage des deux composants 1 , 2 l’un vers l’autre. Ainsi, les deux composants 1 , 2 sont immobilisés l’un par rapport à l’autre par le moyen adhésif à prise rapide 4. Il peut alors être procédé à la prise du moyen adhésif à prise lente 3. La figure 2 illustre le résultat du collage après pressage. Once all the deposits of adhesive means have been made, the bonding process continues with bringing the two components 1, 2 into contact, their respective faces having the deposits of adhesive means 3, 4 facing each other, followed by pressing the two components 1, 2 towards each other. Thus, the two components 1, 2 are immobilized with respect to each other by the fast-setting adhesive means 4. The slow-setting adhesive means 3 can then be set. FIG. 2 illustrates the result. gluing after pressing.
Le moyen adhésif à prise lente 3 a pour vocation première de réaliser le collage du composant 1 avec le composant 2. Il peut aussi avantageusement avoir vocation à assurer une étanchéité entre les deux composants 1 , 2. Aussi selon une autre caractéristique, le moyen adhésif à prise lente 3 est déposé selon au moins un contour continu. Ce contour continu est avantageusement fermé en une boucle, de manière à pouvoir entourer une ouverture à étancher. The first purpose of the slow-setting adhesive means 3 is to achieve the bonding of the component 1 with the component 2. It can also advantageously be intended to ensure a seal between the two components 1, 2. Also according to another characteristic, the adhesive means slow setting 3 is deposited along at least one continuous contour. This continuous contour is advantageously closed in a loop, so as to be able to surround an opening to be sealed.
Selon une autre caractéristique, le moyen adhésif à prise lente 3 comprend une colle à prise lente. Alternativement ou complémentairement il comprend un adhésif double face, soit un support surfacique recouvert sur ses deux faces d’une colle à prise lente. According to another characteristic, the slow-setting adhesive means 3 comprises a slow-setting adhesive. Alternatively or in addition, it comprises a double-sided adhesive, or a surface support covered on both sides with a slow-setting adhesive.
Dans tous les cas, la colle à prise lente peut être solide, liquide ou pâteuse, déposée au pinceau, à la seringue, par sérigraphie, par transfert, par spray ou tout autre moyen. La colle à prise lente est préférentiellement du type polymère. Cette colle polymère est avantageusement du type à prise thermique. Ainsi, une fois les deux composants 1 , 2 en place l’un contre l’autre, un chauffage, par exemple par étuvage, permet de procéder à la prise du moyen adhésif à prise lente 2. Un tel mode de réalisation de la prise est avantageux, relativement à un soudage, en ce qu’il permet de réaliser simultanément un nombre très important de collage, par exemple dans le cas d’un empilement de composants. In all cases, the slow-setting glue can be solid, liquid or pasty, applied by brush, syringe, screen printing, transfer, spray or any other means. The slow-setting glue is preferably of the polymer type. This polymer adhesive is advantageously of the thermal setting type. Thus, once the two components 1, 2 are in place against each other, heating, for example by steaming, makes it possible to set the slow-setting adhesive means 2. Such an embodiment of the setting is advantageous, in relation to welding, in that it allows a very large number of bonding to be carried out simultaneously, for example in the case of a stack of components.
Alternativement ou complémentairement à une colle du type à prise thermique, il est possible d’utiliser une colle à prise provoqué par tout moyen ou énergie. Il en ainsi d’une colle photosensible dont la prise est déclenchée par un rayonnement lumineux, tel un éclairage UV. Une prise temporelle est aussi possible. Alternatively or in addition to an adhesive of the thermal setting type, it is possible to use a setting adhesive caused by any means or energy. This is the case with a photosensitive adhesive, the setting of which is triggered by light radiation, such as UV lighting. A temporal capture is also possible.
Tel que décrit précédemment, le moyen adhésif à prise rapide 4 a vocation à immobiliser le premier composant 1 relativement au deuxième composant 2. Aussi son dépôt peut être ponctuel, et par exemple, limité à au moins deux points. As described above, the rapid-setting adhesive means 4 is intended to immobilize the first component 1 relative to the second component 2. Also, its deposition can be punctual, and for example, limited to at least two points.
A l’instar du moyen adhésif à prise lente 3, le moyen adhésif à prise rapide 4 comprend une colle à prise rapide. Alternativement ou complémentairement il comprend un adhésif double face, soit un support surfacique recouvert sur ses deux faces d’une colle à prise rapide. Like the slow-setting adhesive medium 3, the quick-setting adhesive medium 4 includes a quick-setting glue. Alternatively or in addition, it includes a double-sided adhesive, or a surface support covered on both sides with a quick-setting adhesive.
Dans tous les cas, la colle à prise rapide peut être solide, liquide ou pâteuse, déposée au pinceau, à la seringue, par sérigraphie, par transfert, par spray ou tout autre moyen. La colle à prise rapide est préférentiellement du type à activation par pressage et à prise instantanée. Selon un mode de réalisation, le principe actif collant est contenu dans des microcapsules qui sont rompues par le pressage des deux composants 1 , 2. Le principe actif sèche immédiatement après sa libération par rupture des microcapsules. In all cases, the fast-setting glue can be solid, liquid or pasty, deposited with a brush, a syringe, by screen printing, by transfer, by spray or any other means. The quick-setting glue is preferably of the type with activation by pressing and instantaneous setting. According to one embodiment, the sticky active principle is contained in microcapsules which are broken by pressing the two components 1, 2. The active principle dries immediately after its release by rupture of the microcapsules.
L’invention concerne encore un assemblage obtenu au moyen d’un tel procédé de collage. The invention also relates to an assembly obtained by means of such a bonding process.
Le procédé de collage précédent peut être appliqué à la fabrication d’une pile à combustible 7 en au moins deux interfaces : pour l’assemblage d’une plaque bipolaire 6 et pour l’assemblage d’une plaque bipolaire avec une plaque membrane 15. The above bonding process can be applied to the manufacture of a fuel cell 7 in at least two interfaces: for the assembly of a bipolar plate 6 and for the assembly of a bipolar plate with a membrane plate 15.
Pour mémoire, une plaque bipolaire 6 pour pile à combustible 7 comprend une plaque anode 8 et une plaque cathode 9, sensiblement superposables et assemblées dos à dos. Une pile à combustible est composée d’un empilage de cellules comprenant chacune une plaque cathode 9, une plaque membrane 15 comprenant un assemblage membrane électrode 5 et une plaque anode 8, puis le motif périodique se répète avec une nouvelle plaque cathode 9. La plaque cathode 9 et la plaque anode 8 sont toutes deux métalliques. Aussi il est avantageux de préassembler ensemble la plaque anode 8 d’une cellule avec la plaque cathode 9 de la cellule immédiatement suivante. Ce pré-assemblage est appelé plaque bipolaire 6. Une telle plaque bipolaire 6 est représentée à la figure 3. Ce pré-assemblage applique avantageusement un procédé de collage selon un des modes de réalisation précédents pour assembler une plaque anode 8 avec une plaque cathode 9. Ainsi, avantageusement immobilisé par le moyen adhésif à prise rapide 4 le pré-assemblage peut être manipulé sans crainte pour typiquement réaliser une pile à combustible 7. Dans ce cas particulier, la prise du moyen adhésif à prise lente 3 peut avantageusement être retardée pour être réalisée en même temps que la prise d’autres assemblages, en une unique opération. For the record, a bipolar plate 6 for a fuel cell 7 comprises an anode plate 8 and a cathode plate 9, substantially superimposable and assembled back to back. A fuel cell is composed of a stack of cells each comprising a cathode plate 9, a membrane plate 15 comprising a membrane electrode assembly 5 and an anode plate 8, then the periodic pattern is repeated with a new cathode plate 9. The plate cathode 9 and anode plate 8 are both metallic. It is therefore advantageous to pre-assemble together the anode plate 8 of one cell with the cathode plate 9 of the immediately following cell. This pre-assembly is called bipolar plate 6. Such a bipolar plate 6 is shown in Figure 3. This pre-assembly advantageously applies a bonding process according to one of the previous embodiments to assemble an anode plate 8 with a cathode plate 9. Thus, advantageously immobilized by the quick-setting adhesive means 4, the pre-assembly can be handled without fear to typically produce a fuel cell 7. In this particular case, the grip of the means slow-setting adhesive 3 can advantageously be delayed to be carried out at the same time as the setting of other assemblies, in a single operation.
Pour mémoire, selon un mode de réalisation avantageux, visible aux figures 3, 6 et 7, la plaque anode 8 et la plaque cathode 9 sont percées de lumières 10, 1 1 en regard, de manière à former des canalisations de réactif gazeux traversantes, perpendiculaires au plan des plaques 8, 9. Ainsi la lumière 10 forme une canalisation dans laquelle circule de l’air, tandis que la lumière 11 forme une canalisation dans laquelle circule de l’hydrogène. Dans chaque plaque anode 8 sont disposées des conduites 21 reliant la lumière 10 à l’anode proprement dite, située au centre de la plaque anode 8. De manière analogue dans chaque plaque cathode 9 sont disposées des conduites 22 reliant la lumière 11 à la cathode proprement dite, située au centre de la plaque cathode 9. As a reminder, according to an advantageous embodiment, visible in Figures 3, 6 and 7, the anode plate 8 and the cathode plate 9 are pierced with openings 10, 1 1 facing each other, so as to form passing gaseous reagent pipes, perpendicular to the plane of the plates 8, 9. Thus the lumen 10 forms a pipe in which air circulates, while the lumen 11 forms a pipe in which hydrogen circulates. In each anode plate 8 are arranged conduits 21 connecting the lumen 10 to the anode proper, located at the center of the anode plate 8. Similarly in each cathode plate 9 are arranged conduits 22 connecting the lumen 11 to the cathode. proper, located in the center of the cathode plate 9.
Une première lumière 10, située à gauche de la plaque anode 8 permet l’entrée de l’air jusqu’à l’anode pour alimenter la réaction en oxygène, une deuxième lumière 10, située à droite de la plaque anode 8 permet la sortie et le recyclage de l’air non utilisé et de l’eau produite par la réaction. Une première lumière 1 1 , située à droite de la plaque cathode 9 permet l’entrée de l’hydrogène jusqu’à la cathode pour alimenter la réaction en hydrogène, une deuxième lumière 11 , située à gauche de la plaque cathode 9 permet la sortie et le recyclage de l’hydrogène non utilisé. A first lumen 10, located to the left of the anode plate 8 allows the entry of air to the anode to supply the reaction with oxygen, a second lumen 10, located to the right of the anode plate 8 allows the exit and recycling the unused air and the water produced by the reaction. A first light 1 1, located to the right of the cathode plate 9 allows the entry of hydrogen to the cathode to supply the reaction with hydrogen, a second light 11, located to the left of the cathode plate 9 allows the exit and recycling unused hydrogen.
Les lumières 10 ne communiquent pas avec la cathode. Les lumières 1 1 ne communiquent pas avec l’anode. Lights 10 do not communicate with the cathode. Lights 1 1 do not communicate with the anode.
Aussi il convient d’assurer des étanchéités aux gaz entre les différents circuits ou avec l’extérieur. Le moyen adhésif à prise lente 3 est utilisé pour réaliser ces étanchéités. Pour cela il est déposé selon plusieurs contours continus et fermés. Ainsi, tel qu’illustré à la figure 6 pour une demi plaque symétrique, en considérant les contours figurés en trait continu, un contour 12 entoure une lumière 10, un contour 13 entoure une lumière 1 1 , de telle manière à ce que le gaz circulant dans la lumière 10, 11 ne puisse en sortir que par les conduites dédiées 21 , 22. Une autre étanchéité est assurée sur le pourtour commun des plaques 8, 9 selon un contour 14 continu et fermé disposé le long de la périphérie des plaques 8, 9. It is therefore necessary to ensure gas tightness between the different circuits or with the outside. The slow setting adhesive means 3 is used to achieve these seals. For this it is deposited according to several continuous and closed contours. Thus, as illustrated in Figure 6 for a symmetrical half plate, considering the contours shown in solid lines, an outline 12 surrounds a light 10, an outline 13 surrounds a light 1 1, so that the gas circulating in the lumen 10, 11 can only exit through the dedicated pipes 21, 22. Another seal is provided on the common periphery of the plates 8, 9 according to a continuous and closed contour 14 arranged along the periphery of the plates 8 , 9.
L’invention concerne encore une plaque bipolaire 6 obtenue par un tel procédé d’assemblage. The invention also relates to a bipolar plate 6 obtained by such an assembly process.
Pour mémoire, selon un mode de réalisation avantageux, visible aux figures 6 et 7, une pile à combustible 7 comprend un empilement alternant périodiquement une plaque bipolaire 6 et une plaque membrane 15. Telle qu’illustrée à la figure 7 une plaque bipolaire 6 est disposée, par exemple plaque anode 8 vers le haut, afin de fournir une anode à la cellule. Une plaque membrane 15, intégrant un assemblage membrane électrode 5 est ensuite disposé au-dessus, afin de fournir un assemblage membrane électrode à la cellule. Une nouvelle plaque bipolaire 6 est disposée au-dessus, orientée dans le même sens, soit la plaque cathode 9 vers le bas, afin de fournir une cathode à la cellule. Ainsi est constituée une cellule. La plaque bipolaire 6 supérieure comprend au-dessus, une anode pour la cellule suivante. Les deux plaques d’extrémité de l’empilement sont différentes pour terminer l’empilage et permettre le raccordement des réseaux (air, hydrogène et fluide de refroidissement) aux canalisations. As a reminder, according to an advantageous embodiment, visible in FIGS. 6 and 7, a fuel cell 7 comprises a stack periodically alternating a bipolar plate 6 and a membrane plate 15. As illustrated in FIG. 7, a bipolar plate 6 is arranged, for example anode plate 8 upwards, in order to provide an anode to the cell. A membrane plate 15, incorporating a membrane electrode assembly 5, is then placed above, in order to provide a membrane electrode assembly to the cell. A new bipolar plate 6 is placed above, oriented in the same direction, that is to say the cathode plate 9 downwards, in order to supply a cathode to the cell. Thus is constituted a cell. The upper bipolar plate 6 comprises above, an anode for the next cell. The two end plates of the stack are different to complete the stack and allow the connection of the networks (air, hydrogen and coolant) to the pipes.
Il est supposé que les plaques bipolaires 6 sont déjà préassemblées. Il convient de réaliser l’assemblage entre une plaque bipolaire 6 (côté anode) et une plaque membrane 15 ainsi qu’entre une plaque membrane 15 et une plaque bipolaire 6 (côté cathode). Pour cela, il peut avantageusement être appliqué un procédé de collage selon l’un des modes de réalisation précédents pour assembler une plaque bipolaire 6 avec une plaque membrane 15. It is assumed that the bipolar plates 6 are already pre-assembled. The assembly should be made between a bipolar plate 6 (anode side) and a membrane plate 15 as well as between a membrane plate 15 and a bipolar plate 6 (cathode side). For this, it can advantageously be applied a bonding method according to one of the previous embodiments to assemble a bipolar plate 6 with a membrane plate 15.
La figure 5 montre en vue de profil, l’interface entre une plaque membrane 15 et une plaque bipolaire 6. Au centre de la plaque membrane 15 est intégré un assemblage membrane électrode 5. Cette dernière comprend, de part et d’autre, deux couches 23 assurant les fonctions de diffusion des gaz réactifs et de catalyseur. Figure 5 shows in profile view, the interface between a membrane plate 15 and a bipolar plate 6. In the center of the membrane plate 15 is integrated a membrane electrode assembly 5. The latter comprises, on either side, two layers 23 providing the functions of diffusion of the reactive gases and of catalyst.
Pour mémoire, selon un mode de réalisation avantageux, visible aux figures 3, 4, 6 et 7, la plaque bipolaire 6 et la plaque membrane 15 sont percées de lumières 10, 11 en regard, de manière à former des canalisations de réactif gazeux traversantes et sont encore percées de lumières 16 en regard, de manière à former des canalisations de fluide de refroidissement traversantes. Ainsi la lumière 16 forme une canalisation dans laquelle circule un fluide de refroidissement. Ledit fluide reste confiné à la fenêtre 16 et ne doit pas se répandre dans le reste de la plaque 6, 15. As a reminder, according to an advantageous embodiment, visible in Figures 3, 4, 6 and 7, the bipolar plate 6 and the membrane plate 15 are pierced with openings 10, 11 facing each other, so as to form passing gaseous reagent pipes. and are also pierced with openings 16 facing each other, so as to form through cooling fluid pipes. Thus the lumen 16 forms a pipe in which circulates a cooling fluid. Said fluid remains confined to window 16 and must not spread into the rest of plate 6, 15.
Aussi il convient d’assurer des étanchéités aux gaz entre les différents circuits ou avec l’extérieur, ainsi que le confinement du fluide de refroidissement. Le moyen adhésif à prise lente 3 est utilisé pour réaliser ces étanchéités. Pour cela il est déposé selon plusieurs contours continus et fermés. Ainsi, tel qu’illustré à la figure 6 pour une demi plaque symétrique, en considérant les contours figurés en trait pointillé, un contour 17 entoure une lumière 10, un contour 18 entoure une lumière 11 et un contour 19 entoure une lumière 16. Une autre étanchéité est assurée sur le pourtour commun des plaques 6, 15 selon un contour 20 continu et fermé disposé le long de la périphérie des plaques 6, 15. It is therefore necessary to ensure gas tightness between the various circuits or with the outside, as well as the containment of the cooling fluid. The slow setting adhesive means 3 is used to achieve these seals. For this it is deposited according to several continuous and closed contours. Thus, as illustrated in FIG. 6 for a symmetrical half-plate, considering the contours shown in dotted lines, an outline 17 surrounds a light 10, an outline 18 surrounds a light 11 and an outline 19 surrounds a light 16. A another seal is provided on the common periphery of the plates 6, 15 according to a continuous and closed contour 20 disposed along the periphery of the plates 6, 15.
L’invention concerne encore une pile à combustible 7 obtenue au moyen d’un tel procédé d’assemblage. L’invention a été illustrée et décrite en détail dans les dessins et la description précédente. Celle-ci doit être considérée comme illustrative et donnée à titre d’exemple et non comme limitant l’invention à cette seule description. De nombreuses variantes de réalisation sont possibles. The invention also relates to a fuel cell 7 obtained by means of such an assembly method. The invention has been illustrated and described in detail in the drawings and the preceding description. This should be considered as illustrative and given by way of example and not as limiting the invention to this description alone. Many variant embodiments are possible.
Liste des signes de référence List of reference signs
1 : composant 1 , 1: component 1,
2 : composant 2, 2: component 2,
3 : moyen adhésif à prise lente, 3: medium slow-setting adhesive,
4 : moyen adhésif à prise rapide, 4: quick-setting adhesive medium,
5 : assemblage membrane électrode, 5: membrane electrode assembly,
6 : plaque bipolaire, 6: bipolar plate,
7 : pile à combustible, 7: fuel cell,
8 : plaque anode, 8: anode plate,
9 : plaque cathode, 9: cathode plate,
10 : lumière air, 10: air light,
1 1 : lumière hydrogène, 1 1: hydrogen light,
12 : contour de 10, 12: contour of 10,
13 : contour de 11 , 13: contour of 11,
14 : contour périphérique, 14: peripheral contour,
15 : plaque membrane, 15: membrane plate,
16 : lumière fluide de refroidissement, 16: coolant light,
17 : contour de 10, 17: contour of 10,
18 : contour de 1 1 , 18: contour of 1 1,
19 : contour de 16, 19: contour of 16,
20 : contour périphérique, 20: peripheral contour,
21 : conduite air, 21: air line,
22 : conduite hydrogène, 22: hydrogen pipe,
23 : couche de diffusion et catalyseur. 23: diffusion layer and catalyst.

Claims

REVENDICATIONS
1. Procédé de collage d’un premier composant (1 ) avec un deuxième composant (2), caractérisé en ce qu’il comprend les étapes suivantes : 1. A method of bonding a first component (1) with a second component (2), characterized in that it comprises the following steps:
- mise à disposition d’un moyen adhésif à prise lente et d’un moyen adhésif à prise rapide dans lequel le moyen adhésif à prise lente est configuré pour avoir une prise plus lente qu’une prise rapide du moyen adhésif à prise rapide. - Providing a slow setting adhesive means and a fast setting adhesive means in which the slow setting adhesive means is configured to have a slower setting than a rapid setting of the fast setting adhesive means.
- dépôt sur le premier composant (1 ) et/ou sur le deuxième composant (2) d’un moyen adhésif d’un premier type, parmi le moyen adhésif à prise lente (3) ou le moyen adhésif à prise rapide (4), - deposition on the first component (1) and / or on the second component (2) of an adhesive means of a first type, among the slow-setting adhesive means (3) or the fast-setting adhesive means (4) ,
- dépôt sur le premier composant (1 ) et/ou sur le deuxième composant (2) d’un moyen adhésif d’un deuxième type, différent du premier type, parmi le moyen adhésif à prise lente (3) ou le moyen adhésif à prise rapide (4), - deposition on the first component (1) and / or on the second component (2) of an adhesive means of a second type, different from the first type, from the slow-setting adhesive means (3) or the adhesive means to fast setting (4),
- mise en contact des deux composants (1 , 2), - bringing the two components (1, 2) into contact,
- pressage et - pressing and
- prise du moyen adhésif à prise lente (3). - setting of the slow-setting adhesive means (3).
2. Procédé selon la revendication 1 , où le moyen adhésif à prise lente (3) est déposé selon au moins un contour continu et fermé. 2. The method of claim 1, wherein the slow-setting adhesive means (3) is deposited along at least one continuous and closed contour.
3. Procédé selon l’une quelconque des revendications 1 ou 2, où le moyen adhésif à prise lente (3) comprend une colle à prise lente et/ou un support surfacique recouvert sur ses deux faces d’une colle à prise lente, la colle à prise lente étant préférentiellement du type polymère à prise thermique. 3. Method according to any one of claims 1 or 2, wherein the slow-setting adhesive means (3) comprises a slow-setting adhesive and / or a surface support covered on both sides with a slow-setting adhesive, the slow setting glue preferably being of the thermal setting polymer type.
4. Procédé selon l’une quelconque des revendications 1 à 3, où le moyen adhésif à prise rapide (4) est déposé selon au moins deux points. 4. A method according to any one of claims 1 to 3, wherein the quick-setting adhesive means (4) is deposited at at least two points.
5. Procédé selon l’une quelconque des revendications 1 à 3, où le moyen adhésif à prise rapide (4) est du type à activation par pressage et à prise instantanée. 5. A method according to any one of claims 1 to 3, wherein the quick-setting adhesive means (4) is of the press-activation and snap-setting type.
6. Assemblage obtenu au moyen d’un procédé de collage selon l’une quelconque des revendications 1 à 5. 6. Assembly obtained by means of a bonding process according to any one of claims 1 to 5.
7. Procédé d’assemblage d’une plaque bipolaire (6) pour pile à combustible (7), comprenant une plaque anode (8) et une plaque cathode (9), sensiblement superposables, caractérisé en ce qu’il applique un procédé de collage selon l’une quelconque des revendications 1 à 5 pour assembler la plaque anode (8) avec la plaque cathode (9). 7. A method of assembling a bipolar plate (6) for a fuel cell (7), comprising an anode plate (8) and a cathode plate (9), substantially superimposable, characterized in that it applies a method of bonding according to any one of claims 1 to 5 to assemble the anode plate (8) with the cathode plate (9).
8. Procédé d’assemblage selon la revendication 6, où la plaque anode (8) et la plaque cathode (9) sont percées de lumières (10, 1 1 ) en regard, de manière à former des canalisations de réactif gazeux traversantes et où le moyen adhésif à prise lente (3) est déposé selon un contour (12, 13) continu et fermé entourant chacune des lumières (10, 11 ) et selon un contour (14) continu et fermé en périphérie des plaques (8, 9). 8. The assembly method according to claim 6, wherein the anode plate (8) and the cathode plate (9) are pierced with openings (10, 1 1) facing each other, so as to form passing gaseous reagent pipes and where the slow-setting adhesive means (3) is deposited according to a continuous and closed contour (12, 13) surrounding each of the openings (10, 11) and according to a continuous and closed contour (14) at the periphery of the plates (8, 9) .
9. Plaque bipolaire (6) obtenue au moyen d’un procédé d’assemblage selon l’une quelconque des revendications 7 ou 8. 9. Bipolar plate (6) obtained by means of an assembly method according to any one of claims 7 or 8.
10. Procédé d’assemblage d’une pile à combustible (7), comprenant un empilement alternant périodiquement une plaque bipolaire (6) et une plaque membrane (15), les plaques bipolaires (6) étant toutes orientées dans le même sens, caractérisé en ce qu’il applique un procédé de collage selon l’une quelconque des revendications 1 à 5 pour assembler une plaque bipolaire (6) avec une plaque membrane (15). 10. A method of assembling a fuel cell (7), comprising a stack periodically alternating a bipolar plate (6) and a membrane plate (15), the bipolar plates (6) all being oriented in the same direction, characterized in that it applies a bonding process according to any one of claims 1 to 5 to assemble a bipolar plate (6) with a membrane plate (15).
1 1. Procédé d’assemblage selon la revendication 10, où une plaque bipolaire (6) et une plaque membrane (15) sont percées de lumières (10, 1 1 , 16) en regard, de manière à former des canalisations de réactif gazeux et au moins une canalisation de fluide de refroidissement traversantes et où le moyen adhésif à prise lente (3) est déposé selon un contour (17, 18, 19) continu et fermé entourant chacune des lumières (10, 11 , 16) et selon un contour (20) continu et fermé en périphérie des plaques (6, 15). 1 1. The assembly method according to claim 10, wherein a bipolar plate (6) and a membrane plate (15) are pierced with openings (10, 1 1, 16) opposite, so as to form gaseous reagent pipes and at least one through-flow cooling fluid line and where the slow-setting adhesive means (3) is deposited along a continuous and closed contour (17, 18, 19) surrounding each of the ports (10, 11, 16) and along a contour (20) continuous and closed at the periphery of the plates (6, 15).
12. Pile à combustible (7) obtenue au moyen d’un procédé d’assemblage selon l’une quelconque des revendications 10 ou 1 1. 12. Fuel cell (7) obtained by means of an assembly method according to any one of claims 10 or 1 1.
EP20713721.7A 2019-02-26 2020-02-25 Bonding method which can be applied to fuel cells Pending EP3931897A1 (en)

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FR1901963A FR3093239B1 (en) 2019-02-26 2019-02-26 Bonding process – Application to fuel cells
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WO2020174175A1 (en) 2020-09-03
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US20220149394A1 (en) 2022-05-12
FR3093239B1 (en) 2023-05-12

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