WO2023117963A1 - Plaques bipolaires et procédé de liaison de demi-coques de plaques bipolaires - Google Patents

Plaques bipolaires et procédé de liaison de demi-coques de plaques bipolaires Download PDF

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Publication number
WO2023117963A1
WO2023117963A1 PCT/EP2022/086738 EP2022086738W WO2023117963A1 WO 2023117963 A1 WO2023117963 A1 WO 2023117963A1 EP 2022086738 W EP2022086738 W EP 2022086738W WO 2023117963 A1 WO2023117963 A1 WO 2023117963A1
Authority
WO
WIPO (PCT)
Prior art keywords
bipolar plate
adhesive
plate half
shell
shells
Prior art date
Application number
PCT/EP2022/086738
Other languages
German (de)
English (en)
Inventor
Kay Hälsig
Kay Rockstroh
Ferdinand Löbbering
Andreas Lukasch
Frank Dietrich
Original Assignee
Vitesco Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of WO2023117963A1 publication Critical patent/WO2023117963A1/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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • 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
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other

Definitions

  • the invention relates to a method for joining bipolar plate half-shells for fuel cells or electrolyzers and to bipolar plates provided with an adhesive method.
  • Fuel cells or electrolyzers usually consist of bipolar plates arranged in stacks, between which the mostly gaseous reaction media and cooling media are guided through channel structures.
  • the bipolar plates themselves are in turn composed of two bipolar plate half-shells that are placed one on top of the other in the stacking direction and connected to one another.
  • neighboring bipolar plates and bipolar plate half-shells must be connected to one another in a gas-tight and electrically conductive manner at many points.
  • Bipolar plate half-shells are currently joined by means of welding, preferably laser welding. This primarily fulfills three tasks: an integral connection, tightness and separation from the reaction media as well as good electrical conductivity of the connection and a reduction in the contact resistance between plate halves through additional tack welds in the flow field. Laser welding in the edge area and in the flow field area of the bipolar plates for joining the two bipolar plate half-shells enables secure, large-area contacting between the two half-shells.
  • the bipolar plate half-shells have to be pressed together with great precision during laser welding so that there is a material connection in the laser process. Otherwise, a gap can arise at this point and in the vicinity that cannot transmit electricity. The current has to flow via other contact points, which can lead to an undesirable increase in temperature, so-called "hot spots”. (Bottleneck principle). The welding process therefore places high demands on the joint (e.g. freedom from gaps), so all component inaccuracies must be compensated for in complex devices.
  • bipolar plate half-shells when joining two bipolar plate half-shells, secure positioning must take place so that the bipolar plate half-shells do not shift relative to one another in subsequent processes. Due to the joining method and its subsequent processes, the bipolar plate half-shells are precisely positioned using attachment points or precise workpiece holders and held in position with tools before they are firmly bonded using the welding process. In a subsequent process, the stacking of the bipolar plates, high-precision recordings are also required for the exact positioning of the bipolar plate half-shells.
  • the invention is based on the object of specifying an alternative low-distortion joining method with which the problems described above can be largely avoided.
  • the joining process is intended to enable a reliable, conductive and, if possible, gap-free connection of the bipolar plate half-shells using little material in order to ensure reliable and robust contacting.
  • a cost-effective positioning and corrosion-resistant connection of the bipolar plate half-shells is sought in order to prevent the bipolar plates from shifting in subsequent processes
  • a method according to the invention for connecting bipolar plate half-shells comprises the steps:
  • an adhesive at least to a first adhesive area of a first half-shell of a bipolar plate, wherein the area of adhesion comprises at least a partial area of a first main surface of the first half-shell of a bipolar plate. positioning one second bipolar plate half-shell to the first bipolar plate half-shell, so that at least one second adhesive area of the second bipolar plate half-shell comes into contact with the at least one first adhesive area of the first bipolar plate half-shell. And forming an adhesive connection between the at least one second adhesive area of the second bipolar plate half-shell and the at least one first adhesive area of the first bipolar plate half-shell by crosslinking the adhesive.
  • the relevant bipolar plate half-shells preferably have a flat, essentially plate-shaped basic shape, preferably with a rectangular cross section.
  • An upper and lower side (in the stacking direction of the assembled stack) of these bipolar plate half-shells each form a first and a second opposite main surface of the bipolar plate half-shell.
  • the adhesive area is understood to mean both a (partial) area of the main surface intended for adhesive application and the (partial) area of the main surface already provided with adhesive, as well as a partial area of a main surface, which is covered with an adhesive area of the opposite bipoar plate half shell should come to rest.
  • the two main surfaces of a bipolar plate half-shell preferably have at least one or more channels for conducting the reaction media or a coolant over the surface, as well as a mostly circumferential edge area.
  • Recesses for supply and discharge lines for the reaction and/or cooling media are generally also arranged between the channels and the circumferential edge region.
  • the bipolar plate half-shells with their channels and recesses are made from sheet metal, for example by forming and/or stamping processes.
  • the bipolar plate half-shells are preferably made of stainless steel.
  • Two assembled bipolar plate half-shells form a bipolar plate.
  • a so-called flow field for reaction media such as oxidizing agents or fuel is formed by the channels arranged thereon.
  • the two first main surfaces of the two assembled bipolar plate half-shells face each other inside the bipolar plate. Channels arranged therein are preferably used for the passage of a cooling medium.
  • the two mutually facing main surfaces of the bipolar plate half-shells are glued together by the method according to the invention.
  • an adhesive is applied at least to a first adhesive area of a bipolar plate half-shell.
  • the adhesive area is formed at least by a partial area of the first main surfaces facing one another.
  • the adhesive area can be coherent over the entire area or have different partial areas that are separate from one another.
  • the adhesive area can consist of a number of separate adhesive points or lines.
  • the adhesive area preferably comprises, for example, a closed, circumferential track in the edge area of the first main surface surrounding the channels.
  • the adhesive can optionally only be applied to at least one adhesive area of the first bipolar plate half-shell or alternatively also to corresponding adhesive areas of the first and a second bipolar plate half-shell. It is also possible that adhesive is applied to different partial areas of the adhesive area of both bipolar plate half-shells.
  • the second bipolar plate half-shell is positioned relative to the first bipolar plate half-shell in such a way that the adhesive area of the second bipolar plate half-shell comes into contact with the adhesive area of the first bipolar plate half-shell.
  • the two bipolar plate half-shells are then preferably fixed to one another in this way until, in a further step, crosslinking of the adhesive has taken place.
  • the crosslinking of the adhesive advantageously results in a strong and preferably permanent adhesive connection between the at least one second adhesive area of the second bipolar plate half-shell and the at least one first adhesive area of the first bipolar plate half-shell.
  • crosslinking of the adhesive can also be referred to as curing. Depending on the adhesive used, crosslinking can take place differently or be accelerated. The crosslinking takes place, for example, simply by waiting a certain period of time. However, irradiation with UV light and/or heating of the adhesive bond for crosslinking may also be necessary or provided for.
  • the adhesive connection in the corresponding adhesive areas creates a gas-tight or liquid-tight connection between the two bipolar plate half-shells.
  • a conductive adhesive is particularly preferably used as the adhesive, so that the adhesive connection is electrically conductive.
  • An interior space of the bipolar plate with the coolant channels is preferably sealed off from the environment in a gas-tight and/or liquid-tight manner by a circumferential adhesive connection in the circumferential edge region of the bipolar plate half-shells.
  • a coolant can be supplied and discharged via separately provided recesses in the bipolar plate half-shells.
  • the first and second bipolar plate half-shells are pressed against one another in a further step.
  • This can be done depending on the adhesive used and improve the connection, in particular its tightness. Pressing means that a certain, preferably homogeneous pressure is exerted on the bipolar plate half-shells from the outside. In this way, in particular, the connection can be made free of gaps.
  • the adhesive is applied in a non-contact method step.
  • non-contact methods can be, for example, spraying, e.g. in an airbrush method, or a vapor deposition process or a jet method (or inkjet method).
  • the adhesive is applied over a large area in the adhesive area of the first and/or the second bipolar plate half-shell.
  • This can be done, for example, by spraying or vapor deposition.
  • This advantageously causes the adhesive to be deposited over a large area in the adhesive area.
  • Stencils or masks can advantageously be used here to delimit the adhesive area.
  • An advantageous variant of the method according to the invention provides for a vapor deposition process from an adhesive bath. In this case, adhesive is released from an adhesive bath by vibration (e.g. by means of ultrasound) and is deposited over a large area on a bipolar plate half-shell that is guided past it.
  • the adhesive is applied in a targeted manner in separate adhesive points and/or adhesive lines in the adhesive area of the first and/or the second bipolar plate shell.
  • separate adhesive dots can also be applied, for example, which flow together when the two bipolar plate half-shells are joined (positioned relative to one another) or when pressed and a continuous adhesive/or result in sealing cord.
  • a cohesive seal can also be achieved with a selective application of the adhesive.
  • adhesive points that are separated from one another can also advantageously remain, for example in the flow field or between the individual channels.
  • Various types of adhesive can be used for the method according to the invention and are available on the market. These can differ, for example, in their viscosity. For example, more liquid adhesives can be more suitable for a planar application, while for example more viscous adhesive pastes are more suitable for a spot application.
  • the adhesive used is preferably a conductive adhesive, for example a silver conductive adhesive. In this way, in particular, electrical conductivity of the splice can be achieved.
  • the electrical conductivity of the adhesive is achieved, for example, by conductive particles, e.g. silver particles in the adhesive.
  • the adhesive is applied, for example, in a thickness of a few ⁇ m, in each case depending on the type of adhesive used and the conductive particles it may contain.
  • a thickness of the applied adhesive of 5-10 ⁇ m is advantageous.
  • the first and/or second bipolar plate half-shell has at least one positioning recess for receiving and/or precise positioning of an adhesive point and/or to support positioning relative to an adjacent bipolar plate half-shell.
  • positioning recesses can be located opposite each other on the opposite bipolar plate half-shells.
  • a positioning depression in the first bipolar plate half-shell can also correspond to a corresponding projection on the opposite second bipolar plate half-shell, so that the projection engages in the positioning depression when the bipolar plate is assembled.
  • the positioning of the bipolar plate half-shell relative to one another and in particular a fixation during the crosslinking of the adhesive can be improved by means of adhesive points arranged in the recess. This variant can be particularly advantageous if, in addition to the adhesive points, weld points are provided and the plate half-shells are fixed to one another during laser welding by the (already crosslinked) adhesive points.
  • the bipolar plates assembled using the method according to the invention are arranged in a stack, with a membrane electrode unit (MEA) being positioned between two consecutive bipolar plates.
  • MEA membrane electrode unit
  • one bipolar plate half-shell then forms a fuel cell or electrolyzer cell together with the adjoining membrane-electrode unit and the in turn adjoining bipolar plate half-shell of the subsequent bipolar plate.
  • a membrane-electrode unit can, for example, comprise a polymer-electrolyte membrane or a proton exchange membrane (PEM).
  • the object on which the invention is based is also achieved by a bipolar plate which has a first half-shell and a second half-shell of the bipolar plate Has bipolar plate half shell.
  • the first and second bipolar plate half-shells are connected by an adhesive connection in at least one adhesive area on their mutually facing main surfaces.
  • the at least one adhesive connection can have at least one individual adhesive point and/or at least one continuous adhesive bead and/or at least one continuous adhesive surface.
  • At least one of the bipolar plate half-shells has at least one positioning recess for receiving and/or precise positioning of an adhesive point and/or to support positioning relative to an adjacent bipolar plate half-shell.
  • the bipolar plate according to the invention is particularly advantageously produced by the method according to the invention according to an embodiment variant.
  • the invention further comprises a stack consisting of at least two bipolar plates according to the invention arranged one on top of the other with a membrane-electrode assembly (MEA) arranged between them.
  • MEA membrane-electrode assembly
  • FIG. 1 an application of conductive adhesive by a spraying method according to a first advantageous variant of the method according to the invention
  • FIG. 2 the process step of pressing two bipolar plate half-shells in a further process step
  • FIG. 3 the application of dots of conductive adhesive in positioning depressions according to a second advantageous variant of the method according to the invention
  • FIG. 4 two bipolar plate half-shells connected by adhesive dots with positioning depressions according to the second embodiment variant
  • FIG. 5 Points of conductive adhesive on a bipolar plate half-shell for the formation of a continuous line of adhesive and individual points of adhesive in the flow field according to a third embodiment variant
  • FIG. 6 a further alternative embodiment variant of the method according to the invention, in which conductive adhesive is applied by vibration from a conductive adhesive bath.
  • conductive adhesive is sprayed over an entire main surface of the bipolar plate half-shell 11 including the channels (FIG. 1). Spraying is carried out, for example, with an airbrush system 24. Large-area spraying of the conductive adhesive 12 with a thickness of a few ⁇ m (for example in the single-digit ⁇ m range) enables reliable contacting after uniform pressing (FIG. 2) of the two bipolar plate half-shells 11.
  • laser welding can be carried out at defined points in order to additionally obtain a purely metal-to-metal connection.
  • the surface spraying of conductive adhesive and subsequent pressing enables secure and robust contacting. Compared to the known method using laser welding, a large number of weld seams can be omitted.
  • adhesive 12 is sprayed on over a large area with a thickness in the ⁇ m range.
  • the cycle time in the manufacturing process can be reduced by spraying it on over a large area.
  • the individual bipolar plates 11 can be guided past the spray device 24 here, for example by means of a conveyor belt 25 (in the direction of the arrow).
  • a mask or stencil (not shown) can optionally be used in order to cut out partial areas of the main surfaces 14 .
  • this increases the complexity of the method. Complex clamping processes for a possibly subsequent additional laser welding process can be omitted or carried out in reduced numbers. This can lead to a reduction in costs.
  • FIG. 2 shows the homogeneous pressing of two bipolar plate half-shells (11).
  • the arrows indicate a homogeneous pressure distribution over the area.
  • the two mutually facing main surfaces 14 of the two bipolar plate half-shells 11 are coated here with adhesive 12 over a large area.
  • Figure 3 shows the application of adhesive dots 17 using a jet-print method with a corresponding print device 21.
  • the bipolar plate half-shells are given a constructed positioner recess 18 at very specific points, which allows an adhesive dot 17 to be deposited here using jet-print or similar methods.
  • a second half-shell of the bipolar plate can now be fed in using a robotic arm or similar automated device. Due to the high-precision, precise positioning in the automated workpiece feed, there is no longer a need for stop points or workpiece holders to prevent displacement if these are held in place for the subsequent processes by specifically applied adhesive dots 17.
  • a follow-up process is to be understood here, for example, as a laser welding process to improve the electrical contact or, for example, the stacking of the bipolar plates that have already been joined.
  • the locating indentation may also aid in the stacking process to the adjacent bipolar plate.
  • the method could proceed in the following steps: Step 1: providing the bipolar plate half-shells with adhesive dots Step 2: feeding and positioning an MEA on the bipolar plate Step 3: feeding the next bipolar plate half-shell with previously applied adhesive dots. These steps are repeated depending on the required stack size.
  • Step 1 providing the bipolar plate half-shells with adhesive dots
  • Step 2 feeding and positioning an MEA on the bipolar plate
  • Step 3 feeding the next bipolar plate half-shell with previously applied adhesive dots.
  • FIG. 4 shows an embodiment of a bipolar plate 10 according to the invention.
  • the bipolar plate half-shells 11 each have positioning depressions 18 facing one another, in which adhesive spots 17 are arranged.
  • FIG. 5 A third variant is shown in FIG. 5:
  • a conductive adhesive 12 in the form of individual dots 17 with a defined spacing is applied to the lower bipolar plate half-shell 11 by means of screen printing or the jet process 21 . These are dimensionally stable and do not run.
  • the upper bipolar plate half-shell 11 is then joined to the lower one and pressed in a defined manner. As a result, the individual points 17 run and fix the bipolar plate half-shells 11 to one another. Due to the grid spacing of the individual points, both dense traces (circumferential sealing) as well as targeted attachment points in the crossing area of the river field 26.
  • a conductive adhesive bath 16 is located below a bipolar plate half-shell 11 and is excited by vibrations, for example by means of ultrasound. Drops of conductive adhesive 23 are released from the bath due to the vibrations and wet the bipolar plate half-shell 11 in a continuous adhesive film 22.
  • the bipolar plate halves (BiP) are guided past the bath. Masks or stencils (not shown) can be used to delimit adhesive areas 13 as partial areas of the main surface 14 . Channels 27 are indicated in the bipolar plate half-shell 11 in FIG.
  • this embodiment variant offers a cost advantage due to the simple structure and lower maintenance costs for the arrangement.
  • the inventive method in its various embodiments enables distortion-free contact, a
  • bipolar plates In addition to being used for bipolar plates, it can generally also be used for formed, thin sheet metal where a good material connection and/or gap-free connection with good conductivity is required. In addition, it offers a wide range of uses for connecting components. Due to an electrically conductive part in the adhesive, it is particularly suitable for contacting components with electrical conductivity.

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

Abstract

L'invention concerne un procédé de liaison de demi-coques de plaque bipolaire pour former une plaque bipolaire comprenant les étapes consistant à : appliquer un adhésif au moins sur une première région d'adhérence d'une première demi-coque de plaque bipolaire, la première région d'adhérence étant au moins une sous-région d'une première surface principale de la première demi-coque de plaque bipolaire ; positionner une seconde demi-coque de plaque bipolaire par rapport à la première demi-coque de plaque bipolaire de telle sorte qu'au moins une seconde région d'adhérence de la seconde demi-coque de plaque bipolaire vient reposer contre la ou les premières régions d'adhérence de la première demi-coque de plaque bipolaire ; et former une liaison adhésive entre la ou les secondes régions d'adhérence de la seconde demi-coque de plaque bipolaire et la ou les premières régions d'adhérence de la première demi-coque de plaque bipolaire par réticulation de l'adhésif.
PCT/EP2022/086738 2021-12-20 2022-12-19 Plaques bipolaires et procédé de liaison de demi-coques de plaques bipolaires WO2023117963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021214703.8A DE102021214703A1 (de) 2021-12-20 2021-12-20 Verfahren zum Verbinden von Bipolarplatten für Brennstoffzellen
DE102021214703.8 2021-12-20

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WO2023117963A1 true WO2023117963A1 (fr) 2023-06-29

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WO (1) WO2023117963A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060134502A1 (en) * 2004-12-16 2006-06-22 Patrick Garceau Bipolar plate for a fuel cell
RO129408A2 (ro) * 2012-09-26 2014-04-30 Institutul Naţional De Cercetare-Dezvoltare Pentru Tehnologii Criogenice Şi Izotopice - Icsi Râmnicu Vâlcea Procedeu de realizare a plăcilor bipolare cu sistem de răcire de tip lichid inclus pentru ansamblurile de pile de combustibil pem
DE102015203684A1 (de) * 2015-03-02 2016-09-08 Volkswagen Ag Bipolarplatte mit adhäsiv unterstützten Bipolarplattenregionen
DE102018116057A1 (de) * 2018-07-03 2020-01-09 Volkswagen Aktiengesellschaft Montageanlage für die Montage eines Brennstoffzellenstapels
DE102019203884A1 (de) * 2019-03-21 2020-09-24 Robert Bosch Gmbh Halbzeug für eine Bipolarplatte einer Brennstoffzelle, Bipolarplatte, Brennstoffzellen sowie Verfahren zur Herstellung eines Halbzeuges für eine Bipolarplatte einer Brennstoffzelle und einer Bipolarplatte einer Brennstoffzelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060134502A1 (en) * 2004-12-16 2006-06-22 Patrick Garceau Bipolar plate for a fuel cell
RO129408A2 (ro) * 2012-09-26 2014-04-30 Institutul Naţional De Cercetare-Dezvoltare Pentru Tehnologii Criogenice Şi Izotopice - Icsi Râmnicu Vâlcea Procedeu de realizare a plăcilor bipolare cu sistem de răcire de tip lichid inclus pentru ansamblurile de pile de combustibil pem
DE102015203684A1 (de) * 2015-03-02 2016-09-08 Volkswagen Ag Bipolarplatte mit adhäsiv unterstützten Bipolarplattenregionen
DE102018116057A1 (de) * 2018-07-03 2020-01-09 Volkswagen Aktiengesellschaft Montageanlage für die Montage eines Brennstoffzellenstapels
DE102019203884A1 (de) * 2019-03-21 2020-09-24 Robert Bosch Gmbh Halbzeug für eine Bipolarplatte einer Brennstoffzelle, Bipolarplatte, Brennstoffzellen sowie Verfahren zur Herstellung eines Halbzeuges für eine Bipolarplatte einer Brennstoffzelle und einer Bipolarplatte einer Brennstoffzelle

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