WO2015144269A1 - Plaque bipolaire et pile à combustible équipée de cette plaque - Google Patents

Plaque bipolaire et pile à combustible équipée de cette plaque Download PDF

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Publication number
WO2015144269A1
WO2015144269A1 PCT/EP2014/078536 EP2014078536W WO2015144269A1 WO 2015144269 A1 WO2015144269 A1 WO 2015144269A1 EP 2014078536 W EP2014078536 W EP 2014078536W WO 2015144269 A1 WO2015144269 A1 WO 2015144269A1
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WO
WIPO (PCT)
Prior art keywords
plates
bipolar plate
coolant
channel volume
channels
Prior art date
Application number
PCT/EP2014/078536
Other languages
German (de)
English (en)
Inventor
Emerson Gallagher
Hannes Scholz
Original Assignee
Volkswagen Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen Ag filed Critical Volkswagen Ag
Publication of WO2015144269A1 publication Critical patent/WO2015144269A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to a bipolar plate for a fuel cell, wherein the bipolar plate comprises a pair of profiled plates and each plate has a coolant side and a cell side and the two plates are arranged and connected such that channels for transporting coolant are formed between the facing coolant sides and a fuel cell with such a.
  • Fuel cells use the chemical transformation of a fuel with oxygen to water to generate electrical energy.
  • fuel cells contain as core component the so-called membrane electrode assembly (MEA for membrane electrode assembly), which is a composite of an ion-conducting, in particular proton-conducting membrane and in each case a membrane disposed on both sides of the electrode (anode and cathode).
  • MEA membrane electrode assembly
  • GDL gas diffusion layers
  • the fuel cell is formed by a multiplicity of stacked MEAs whose electrical powers are added together.
  • the fuel in particular hydrogen H 2 or a hydrogen-containing gas mixture
  • the fuel is fed to the anode, where an electrochemical oxidation of H 2 to H + takes place with emission of electrons.
  • an electrochemical oxidation of H 2 to H + takes place with emission of electrons.
  • the electrolyte or the membrane which separates the reaction spaces gas-tight from each other and electrically isolated, takes place (water-bound or anhydrous) transport of protons H + from the anode compartment in the cathode compartment.
  • the electrons provided at the anode are supplied to the cathode via an electrical line.
  • Oxygen or an oxygen-containing gas mixture is fed to the cathode, resulting in a reduction from 0 2 to O 2 " with the electrons being taken in.
  • these oxygen anions react with the protons transported through the membrane to form water From chemical to electrical energy, fuel cells achieve improved efficiency over other generators of electricity due to the Carnot factor bypass.
  • the fuel cell is formed by a plurality of individual cells arranged in the stack, so that it is also referred to as a fuel cell stack.
  • bipolar plates are arranged, which supply the individual cells with the operating media, so ensure the reactants and a coolant.
  • the bipolar plates provide an electrically conductive contact to the membrane-electrode units.
  • Bipolar plates are usually composed of a pair of profiled plates, each having a coolant side and a cell side and the two plates are arranged and connected to each other such that form between the facing coolant sides channels for the transport of coolant.
  • the plates have in their active region a grouping of grooves or channels which form open flow fields on their cell sides for distributing the reactants across the surfaces of the respective anodes and cathodes. Coolant channels are formed between the plates within the bipolar plate and distribute coolant over the fuel cell stack for cooling thereof.
  • the invention is based on the object to provide a bipolar plate for producing a fuel cell, in which the thermal mass of the coolant can be influenced or at least reduced and which in particular shows improved behavior in cold and frost starts.
  • a bipolar plate for a fuel cell which comprises a pair of profiled plates, each plate has a coolant side and a cell side, and the two plates are arranged and connected such that between the facing coolant sides channels for transporting Coolant can be formed.
  • at least one of the plates has on its coolant side a material for reducing the channel volume of the channels.
  • An inventively constructed bipolar plate is characterized in that the cross section of the coolant channels is reduced compared to conventional bipolar plates.
  • conventional bipolar plates there is a slight cooling, relative to the reactant gases. medium volume flow, also in comparison to the reactant gases, large volume available.
  • This mismatch leads in conventional bipolar plates to significant disadvantages in frost start behavior, system dynamics and coolant uniform distribution.
  • the reduction of the coolant channel cross sections compensates for these disadvantages. In particular, it leads to an increase in the frost stability of the bipolar plates and the fuel cell constructed from such as well as to a reduction in the minimum possible temperature for the startup of a fuel cell.
  • the inventively introduced into the channels of the bipolar plate material leads by displacement of coolant to a reduction of the coolant volume.
  • an additional degree of freedom of design is obtained, since the cross section of the coolant channels is no longer due to the design of the outer flow fields, but rather can be designed specifically targeted.
  • a pressure loss of the coolant during the design of the bipolar plate can be influenced by the material arrangement.
  • a bipolar plate is basically composed of two plates, which are usually connected to each other inseparably. This compound can be made for example by gluing, welding and / or by pressing.
  • the plates have a profiling structure which forms coolant channels on the mutually facing sides and forms open channels on the opposite sides of the cell sides, which form a flow field for the reaction media or else reactant gases.
  • the bipolar plate forms a separator between two active cells.
  • one of the plates of a bipolar plate is adjacent to a cathode space, and is therefore also referred to as a cathode plate, while the plate connected to this cathode plate is adjacent to an anode space, and thus is referred to as an anode plate.
  • the plates can also be connected to each other via profile-related webs, which at the same time separate the channels between the plates.
  • a material for reducing a channel volume is introduced on the coolant side of the plates, ie ultimately between the plates.
  • Channel volume is significantly caused by displacement of the coolant through the material.
  • the material communicates with at least one of the plates.
  • the material is therefore preferably arranged on the cathode plate and / or the anode plate.
  • the material which reduces the channel volume has a thermal conductivity ⁇ of at least 1 W / mK.
  • the decisive total thermal resistance of an individual cell is measured over the entire cell height, ie over the distance between the catalyst layer (at which the heat to be dissipated arises) and the coolant in the coolant channels.
  • the total thermal resistance is thus made up of the individual thermal conductivities (or thermal resistances) of the
  • the displacement material is now preferably chosen so that its thermal conductivity is significantly greater than that of the gas diffusion layer (or its thermal resistance is significantly lower than that of the GDL). Thus, the total thermal resistance almost does not change. This has the advantage that no volume, weight or performance penalty arise.
  • the thermal conductivity of common gas diffusion layers is in the range of 0.1 W / mK. It has now been shown that the introduction of channel volume decreasing
  • Material in the region between the plates of a bipolar plate is particularly advantageous if the material has a thermal conductivity lambda ⁇ of at least an order of magnitude greater than that of the gas diffusion layer used, that is preferably 1 W / mK.
  • the channel volume reducing material comprises carbon black, graphite composite, silicon carbide, aluminum nitrite, metal foam and / or a thermally conductive polymer.
  • a graphite composite is particularly preferred.
  • graphite composite means any mixture of carbon and a binder which has a high thermal conductivity
  • graphite composites are included which are also used in the production of conventional electrodes and are therefore accessible to the person skilled in the art.
  • reducing material is in the form of a coating.
  • the advantage of this embodiment is that coatings are easy and especially evenly applied to structured surfaces.
  • the coating can in principle be carried out by means of all known coating methods.
  • the coating by injection molding, by chemical methods, but also by spraying, printing, knife coating, rolling, brushing, brushing or sputtering is preferred.
  • the selection of the method depends in particular on the selected material. If, for example, a thermally conductive polymer is used as the coating, then it is preferably applied in the liquid state by spraying, printing, by means of injection molding or the like.
  • the coating has a thickness which preferably corresponds to at least 10% of a channel diameter.
  • the coating is arranged over a large area on at least one of the plates, it comes all over the surface to a contact between the coating and the plate, so that the coolant in the region of the coating preferably has no direct contact with the plate.
  • the coating can be applied before and / or after assembling and connecting the plates to the bipolar plate.
  • the coating has a material thickness which is not homogeneous over the channel surface.
  • the material has a sealing and / or adhesive function.
  • This embodiment has the advantage that an additional welding to connect the plates can be omitted. This may additionally have a positive influence on a temperature profile of the plate and on the cold or frost start behavior of the bipolar plate or fuel cell, since the thermal mass of the bipolar plate is reduced. Furthermore, a working step can be saved by this embodiment and thus the productivity can be increased.
  • welding is one
  • materials are preferred for coating, which can be applied in liquid or molten or highly viscous form.
  • the liquid is applied to the coolant side of at least one of the plates.
  • the adhesive and / or sealing function is then achieved during assembly, in particular compression, of the panels in the areas in which the still liquid or cured coating makes contact with the opposite panel. Is the
  • the coating For the sealing and / or connecting effect of the coating, it may be irrelevant whether the coating also exists on the webs after the pressing, or of these is pushed out and was displaced in an area near the jetties within the canals.
  • reducing material comprises a porous material, preferably a porous material having an open pore structure, which partially or completely lines the channels.
  • the advantage of this embodiment is, in particular, that the material which reduces the channel volume can also be introduced or applied subsequently into the channels after assembly of the plates. However, it is also preferred that the porous material is applied to at least one of the plates before assembling the plates.
  • the porous material is a substance which, in solid form, has a large number of pores, which are designed to enable a transport of coolant, in particular of water. These may be micro-, meso- and
  • Macropores act, with the dominance of one of the pores is just as preferred as a uniform occurrence of all three types of pores.
  • the porous material may be applied in liquid form as a coating on at least one of the plates, the porous structure of the material being set upon curing.
  • An example here are metal foams.
  • the material can be introduced into the channels in granular form, the granules preferably having small diameters, so that cavities formed between the granules are preferably at most two orders of magnitude larger than an average pore diameter of the porous material.
  • the channel volume reducing material extends only partially over the coolant side.
  • this embodiment allows control of condensate formation during operation of a fuel cell.
  • regions of the coolant side of at least one of the plates are defined, which in turn both
  • Coolant side at least one of the plates either webs or channel bottoms are coated. Particularly preferred is the uniform coating of a
  • Heat exchange between coolant and electrode area influenced by the arrangement of the channel volume reducing material is influenced by the arrangement of the channel volume reducing material.
  • an electrical line between the plates of a bipolar plate is crucial for the operation in a fuel cell. Both the thermal and the electric line are achieved in particular via the resulting in the region of the webs, preferably direct connection between the plates.
  • the channel volume extends
  • the channel volume reducing material is a porous material.
  • the absence of channel volume reducing material in the region of the webs can be achieved in different ways. For example, in a first step, a coating over the entire surface, so also in the region of the webs, take place. In a second step, the coating in the region of the webs can then be removed again. This removal can be done for example by removal, such as by doctoring, the coating in the region of the webs. Alternatively, the coating can be removed from the areas of the lands by placing the tiles together after application of the coating be pressed. Depending on the viscosity of the coating and of the
  • the plates comprise a metallic material.
  • plates for bipolar plates are made of either metallic materials or graphitic carbon.
  • Metallic materials are characterized by the fact that they are
  • bipolar plates made of metallic materials are recyclable.
  • the term metallic material is used for alloys, for pure metals as well as for intermetallic phases. It therefore applies to all materials which have the following characteristic metallic substance properties in solid or liquid form: high electrical conductivity, which decreases with increasing temperature; high thermal conductivity and especially high ductility. These properties are based on the fact that the cohesion of the atoms in question takes place with the metallic bond, the most important feature of which are the freely moving electrons in the lattice.
  • the invention further relates to a fuel cell having at least one bipolar plate in one of the embodiments described above.
  • a fuel cell according to the invention is distinguished, in particular, by an improved cold and frost start behavior compared to conventional fuel cells.
  • a minimum temperature for the startup of the fuel cell compared to conventional fuel cells is significantly reduced.
  • cost-effective metallic materials can be used for the bipolar plates of the fuel cell without being disadvantageous in terms of performance parameters or service life. Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.
  • FIG. 1 shows a schematic representation of a fuel cell stack according to the prior art
  • FIG. 2 shows a schematic cross-sectional view of a section of a bipolar plate according to the prior art
  • FIG. 3 shows a schematic cross-sectional view of a section of a bipolar plate according to a first embodiment of the invention
  • FIG. 4 shows a schematic cross-sectional view of a section of a bipolar plate according to a second embodiment of the invention
  • FIG. 5 shows a schematic cross-sectional view of a section of a bipolar plate according to a third embodiment of the invention
  • FIG. 6 shows a schematic cross-sectional view of a section of a bipolar plate according to a fourth embodiment of the invention
  • Figure 7 is a schematic cross-sectional drawing of a section of a bipolar plate according to a further embodiment of the invention.
  • Figure 8 is a schematic cross-sectional view of a preferred embodiment
  • FIG. 1 shows a highly schematic representation of such a fuel cell stack according to the prior art.
  • the fuel cell stack 100 comprises a first end plate 1 1 1 and a second end plate 1 12. Between the end plates 1 1 1, 1 12 a plurality of stacked stack elements is arranged, which bipolar plates 1 13 and membrane Electrode units 1 14 include.
  • the bipolar plates 1 13 are alternately stacked with the membrane electrode units 1 14.
  • the membrane-electrode assemblies 14 each comprise a membrane and electrodes adjoining the membrane on both sides, namely an anode and a cathode (not shown). Adjacent to the membrane, the membrane electrode units 1 14 can also have gas diffusion layers (also not shown). Between the bipolar plates 1 13 and membrane electrode assemblies 1 14 are respectively
  • Seal elements 1 15 arranged, which seal the anode and cathode chambers gas-tight to the outside. Between the end plates 1 1 1 and 1 12 of the fuel cell stack 100 by means of tension elements 1 16, z. B. tie rods or clamping plates, pressed.
  • FIG. 1 only the narrow sides of the bipolar plates 13 and the membrane electrode units 14 are visible.
  • the main sides of the bipolar plates 1 13 and the membrane electrode assemblies 1 14 abut each other.
  • the representation in FIG. 1 is partly not dimensionally true.
  • a thickness of a single cell, consisting of a bipolar plate 1 13 and a membrane electrode assembly 1 14, a few mm, the membrane electrode assembly 1 14 is the much thinner component.
  • FIG. 2 shows a section of a conventional bipolar plate 1 13 in a schematic cross-sectional view in the active area.
  • the fuel cell 100 comprises two profiled plates 1 1, which each have a coolant side 1 1 a and a cell side 1 1 b.
  • the plates have shown in the embodiment of a wave profile and are preferably made of a metallic material.
  • the plates 1 1 are composed such that the coolant sides 1 1 a of the two plates 1 1 facing each other.
  • the plates form 1 1 channels 12, which are separated by webs 16 from each other.
  • the channels 12 are designed to be in operation as a fuel cell coolant 13th
  • an anode space or a cathode space is formed on the cell side.
  • the plate 1 1 is referred to as an anode or cathode plate.
  • the channel cross section of Coolant channels 12 and thus the amount of guided coolant 13 in the illustrated conventional bipolar plate 1 13 significantly by the structure of the cells on the sides 1 1 b formed open channels (anode or cathode channels) conditionally.
  • Figure 3 shows a preferred embodiment of a bipolar plate 10 according to the invention, wherein the same reference numerals are used for matching elements.
  • the main difference consists in a channel volume reducing material 14, which is arranged in the channel bottoms of the coolant side 1 1 a one of the plates 1 1.
  • the channel volume reducing material 14 is arranged exclusively in the channel bottoms of the channels.
  • the channel volume reducing material 14 can be arranged both on the coolant side 1 1 a of the cathode and the anode plate 1 1.
  • the channel volume reducing material 14 shown in Figure 3 is a non-porous, coated material which occupies a portion of preferably at least 10% of the channel volume.
  • the channel volume reducing material 14 reduces, depending on the thickness in which it is applied to the coolant side 1 1 a, the cross section of the channel 12 and thus the transported coolant volume. Depending on the thermal conductivity of the channel volume reducing material 14, the choice of plate to which the channel volume reducing material 14 is selectively applied affects the flow pattern and hence the cooling behavior on the plates.
  • the channel volume reducing material 14, as shown in Figure 4 be applied to the coolant sides 1 1 a of both plates 1 1.
  • the coatings of channel volume reducing material 14 shown in FIGS. 3 and 4 are formed by applying the material in liquid form, for example, by
  • FIG. 5 shows a bipolar plate 10 according to the invention in a further embodiment.
  • the channel volume reducing material 14 is also designed as a coating, and the coating was applied before contacting the plates 1 1, at least within the active area of the bipolar plate 10 over the entire surface on the coolant side 1 1 a of the plates.
  • It can be chosen a material which is liquid or at least viscous during application. Even before curing of the material, the plates are pressed against each other on the coolant side, so that the channel volume reducing material 14 is pushed out of the region of the webs 16.
  • the channel volume reducing material 14 unlike the embodiment shown in Figure 3, not only in the channel bottom of one of the plates, but also arranged in a region near the web of the other plate.
  • used material 14 is formed in this area between the plates 1 1 a sealing and / or adhesive connection. In the region of the webs 16, the plates 11 are in contact with each other, as in other embodiments shown.
  • the channel volume reducing material 14 is as explained in Figure 5 in a liquid or at least viscous state on the coolant side 1 1 a of the plates 1 1 applied. In contrast to Figure 5, however, the material is removed before assembly of the plates 1 1 before or after the curing of the material in the region of the webs.
  • a suitable method for removing the channel volume reducing material 14 is, for example, doctoring.
  • the material 14 may have a sealing function in the finished bipolar plate 10 in addition to the channel volume decreasing function.
  • the channel volume reducing material 14 may be present as a porous material.
  • FIG. 7 shows a possible embodiment in which the porous, channel-volume-reducing material 14 in the illustrated area lines the entire channel 12.
  • the coolant volume is defined in this embodiment by the number and size of the pores 17 of the material 14.
  • the channel volume reducing material 14 can be done for this purpose, for example by spraying a foam into the channels 12 of a composite bipolar plate.
  • porous channel volume reducing material 14 may be introduced into channels 12 in granular form.
  • Another alternative for introducing a porous, channel volume reducing material 14 into the channels 12 of a bipolar plate 10 provides the outlined in Figure 8 method.
  • the preferably porous, channel volume reducing material 14 may be applied in at least viscous form on the coolant side 1 1 a of one or both plates 1 1 of the bipolar plate 10.
  • the channels 12 are completely or partially filled with the material 14.
  • the lands between the channels are not coated with channel volume reducing material 14.
  • the plates 1 1 are placed over one another and optionally pressed.
  • the channel volume reducing material 14 may preferably be fully cured at the time of assembly of the plates 11, as thus the material 14 remains in the area defined by the application.
  • the plates 1 1 of the bipolar plate 10 are not the same.
  • the structure on the cell side 1 1 b and the coolant side 1 1 a is not symmetrical.
  • One of the plates shows
  • Coolant side a profile in which the webs 16 are wider than the channel bottoms, while the other plate 1 1 shows a reverse image.
  • the resulting due to the composition of such plates 1 1 coolant channels 12 are also not symmetrical.
  • contact between channel volume reducing material 14 and opposing plate 11 may occur if the channel volume reducing material 14 on the coolant side 11a of that plate 11 was arranged, which has the larger, especially wider channel bottoms.
  • the channel volume reducing material 14 may perform a sealing and / or bonding function, depending on the type of material, in addition to a refrigerant displacing.
  • a material having heat conductivities ⁇ of at least 1 W / mk is preferably used as the channel volume reducing material 14.
  • Such materials are in particular carbon black, graphite composite, silicon carbide, aluminum nitrite,

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

Abstract

L'invention porte sur une plaque bipolaire (10) pour une pile à combustible, la plaque bipolaire (10) comprenant une paire de plaques profilées (11) et chaque plaque (11) présentant un côté fluide de refroidissement (11a) et un côté cellule (11b), et les deux plaques (11) étant disposées l'une en face de l'autre et reliées de telle sorte qu'il se forme entre les côtés fluide de refroidissement (11a) dirigés l'un vers l'autre des canaux (12) destinés au transport d'un fluide de refroidissement. L'invention porte aussi sur une pile à combustible équipée d'une telle plaque. Selon l'invention, au moins l'une des plaques (11) présente sur son côté fluide de refroidissement (11a) une matière (14) servant à réduire le volume des canaux (12).
PCT/EP2014/078536 2014-03-25 2014-12-18 Plaque bipolaire et pile à combustible équipée de cette plaque WO2015144269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014205543.1A DE102014205543A1 (de) 2014-03-25 2014-03-25 Bipolarplatte sowie Brennstoffzelle mit einer solchen
DE102014205543.1 2014-03-25

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Publication Number Publication Date
WO2015144269A1 true WO2015144269A1 (fr) 2015-10-01

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CN112952131A (zh) * 2021-03-12 2021-06-11 大连交通大学 一种具有纳米晶AlN改性层的Fe-Mn基合金双极板及其制备方法
CN114420967A (zh) * 2022-03-29 2022-04-29 潍柴动力股份有限公司 氢燃料电池电堆及解决端部单体寿命快速衰减的方法

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DE102016225573A1 (de) * 2016-12-20 2018-06-21 Robert Bosch Gmbh Bipolarplatte für eine Brennstoffzelle und Brennstoffzelle
FR3117275B1 (fr) 2020-12-08 2023-06-09 Commissariat Energie Atomique Plaque bipolaire imprimé pour réacteur électrochimique
DE102022101359B4 (de) 2022-01-21 2024-06-06 Audi Aktiengesellschaft Verfahren zum Betreiben einer Brennstoffzellenvorrichtung, Brennstoffzellenvorrichtung sowie Kraftfahrzeug mit einer Brennstoffzellenvorrichtung

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US6974648B2 (en) 2003-09-12 2005-12-13 General Motors Corporation Nested bipolar plate for fuel cell and method
US7291414B2 (en) 2004-12-10 2007-11-06 General Motors Corporation Reactant feed for nested stamped plates for a compact fuel cell
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DE112004001443T5 (de) 2003-08-06 2008-03-20 General Motors Corp., Detroit Klebstoffverbindungen für metallische bipolare Platten
DE102011009353A1 (de) * 2010-01-28 2011-09-01 Gm Global Technology Operations Llc , ( N. D. Ges. D. Staates Delaware ) Bipolarplatte mit reduziertem Kühlmittelvolumen und asymmetrischer Wärmeentfernung
WO2014035395A1 (fr) * 2012-08-30 2014-03-06 Utc Power Corporation Élément de pile à combustible ayant une distribution de capacité de refroidissement sélectionnée

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Publication number Priority date Publication date Assignee Title
WO2003092105A1 (fr) * 2002-04-25 2003-11-06 General Motors Corporation Ensemble de plaques bipolaires presentant des colonnes transversales
DE10236998A1 (de) * 2002-08-13 2004-03-04 Daimlerchrysler Ag Elektrochemische Zelle
DE10393075T5 (de) * 2002-08-19 2005-08-25 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Bipolare Platte für Brennstoffzellen mit einem leitenden Schaum als Kühlmittellage
DE112004001443T5 (de) 2003-08-06 2008-03-20 General Motors Corp., Detroit Klebstoffverbindungen für metallische bipolare Platten
US20050053810A1 (en) * 2003-09-08 2005-03-10 Honda Motor Co., Ltd. Method and system for starting up fuel cell stack at subzero temperatures, and method of designing fuel cell stack
US6974648B2 (en) 2003-09-12 2005-12-13 General Motors Corporation Nested bipolar plate for fuel cell and method
US7291414B2 (en) 2004-12-10 2007-11-06 General Motors Corporation Reactant feed for nested stamped plates for a compact fuel cell
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CN112952131A (zh) * 2021-03-12 2021-06-11 大连交通大学 一种具有纳米晶AlN改性层的Fe-Mn基合金双极板及其制备方法
CN112952131B (zh) * 2021-03-12 2023-08-22 大连交通大学 一种具有纳米晶AlN改性层的Fe-Mn基合金双极板及其制备方法
CN114420967A (zh) * 2022-03-29 2022-04-29 潍柴动力股份有限公司 氢燃料电池电堆及解决端部单体寿命快速衰减的方法
CN114420967B (zh) * 2022-03-29 2022-08-05 潍柴动力股份有限公司 氢燃料电池电堆及解决端部单体寿命快速衰减的方法

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