WO2021180431A1 - Plaque bipolaire à écoulement massique optimisé - Google Patents

Plaque bipolaire à écoulement massique optimisé Download PDF

Info

Publication number
WO2021180431A1
WO2021180431A1 PCT/EP2021/053697 EP2021053697W WO2021180431A1 WO 2021180431 A1 WO2021180431 A1 WO 2021180431A1 EP 2021053697 W EP2021053697 W EP 2021053697W WO 2021180431 A1 WO2021180431 A1 WO 2021180431A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
mass flow
bipolar plate
distribution
discharge
Prior art date
Application number
PCT/EP2021/053697
Other languages
German (de)
English (en)
Inventor
Harald Schmeisser
Ulrich Berner
Udo Riegler
Florian Alexander KNORR
Jochen Wessner
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021180431A1 publication Critical patent/WO2021180431A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • 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
    • H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
    • 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
    • H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
    • 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
    • H01M8/0254—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
    • 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 is based on a mass flow-optimized bipolar plate and a method for optimizing a mass flow within a bipolar plate.
  • Fuel cells are electrochemical energy converters in which the reaction gases, such as hydrogen and oxygen, are converted into water, electrical energy and heat.
  • the reaction gases are separated by a polymer membrane that provides the necessary insulation.
  • a fuel cell here has a typical symmetrical structure in which a catalyst layer and a gas distribution layer are arranged on both sides following the polymer membrane, each of which is in turn adjoined by a bipolar plate.
  • the bipolar plates arranged within the fuel cell fulfill several functions. They are used for the electrical connection of the cells, for the supply and distribution of the reaction gases and as a coolant. In particular with regard to an effective and homogeneous distribution of the reaction gases over an active area of the bipolar plate, there is currently still a need for optimization.
  • a bipolar plate For the best possible distribution of the reaction gases over an active area, it is customary for a bipolar plate to have a supply area with supply channels, a discharge area with discharge channels and an active area with distribution channels for distributing the reaction gases to an electrode surface.
  • a bipolar plate since thermal and / or chemical reactions can occur in the course of the distribution of the reaction gases the mass flows along the active area differ locally, sometimes massively.
  • the subject matter of the invention is a device having the features of the independent device claim and, according to a second aspect, a method according to the independent method claim. Further features and details of the invention emerge from the respective subclaims, the description and the drawings. Features and details that are described in connection with the device according to the invention naturally also apply in connection with the method according to the invention and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is or can always be made to the individual aspects of the invention.
  • the mass flow-optimized bipolar plate according to the invention serves in particular for a homogeneous distribution of the reaction gases to the relevant electrode surfaces of a fuel cell, which enables both efficient operation and low wear.
  • a mass flow has to be taken into account with regard to a homogeneous distribution of the reaction gases and a mere consideration of a pressure difference is not sufficient, since the latter is too susceptible to changes in other variables.
  • a variation in the length or diameter of feed channels and Discharge channels to ensure a homogeneous distribution of the reaction gases along an active area is not sufficient.
  • the mass flow-optimized bipolar plate comprises an active area with a plurality of juxtaposed distribution channels for distributing a fluid to an electrode surface, a feed area with a plurality of feed channels for feeding the fluid to the distribution channels, a discharge area with a plurality of discharge channels for discharging the fluid from the distribution channels, wherein the distribution channels have the same length and wherein the individual supply channels and discharge channels have at least partially a different length.
  • the mass flow-optimized bipolar plate is characterized in that the distribution channels differ at least partially with regard to their hydraulic diameter in order to ensure an essentially constant mass flow within the active area.
  • the mass flow-optimized bipolar plate according to the invention can preferably be used in a fuel cell or in a fuel cell system.
  • the use of the bipolar plate as a gas distributor plate in electrolysis processes is also conceivable.
  • the plate can preferably be used in a motor vehicle or the like.
  • Use in other fuel cell-powered means of transport or stationary systems is also conceivable.
  • a fluid is understood to be an at least partially gaseous medium which, in the present case, can preferably be formed in the form of hydrogen or air or oxygen.
  • an electrode surface is also understood to mean the surface of an electrical conductor (anode or cathode) which is in electrical contact with another electrical conductor functioning as a counter electrode (anode or cathode).
  • the supply area is preferably a first area of the bipolar plate which is arranged in front of an active area and in particular serves to supply the fluid to be distributed into the distribution channels of the active area.
  • the feed channels of the feed area can preferably all be brought together in a feed chamber arranged upstream of the feed channels.
  • a third area is preferably also used as the discharge area within the scope of the invention Designated area of the bipolar plate, which is arranged after an active area and is used in particular to discharge the fluid to be distributed from the distribution channels of the active area.
  • the discharge channels of the discharge area can preferably all open into a discharge chamber downstream of the discharge channels.
  • the active area is also understood to be the area arranged between the feed and discharge areas, which serves in particular to distribute the fluids to the electrode surface. It goes without saying that individual feed and / or discharge channels can also have a very similar or the same length.
  • a mass flow is preferably understood to mean the mass of a medium, in the present case the fluid, which moves through a given cross section over a period of time.
  • the supply channels and / or the discharge channels differ at least partially with regard to their hydraulic diameter in order to achieve a to ensure essentially constant mass flow.
  • the supply channels and / or the discharge channels and / or the distribution channels can be designed and arranged with respect to one another in such a way that a variation in the length of the supply channels and / or the discharge channels and a variation of the hydraulic diameter of the feed channels and / or the discharge channels and / or the distribution channels ensures a substantially constant mass flow within the distribution channels when distributing the fluids over the active area.
  • the supply channels and / or the discharge channels have branch points for varying their length, the branch points inside or outside the plane the distribution channels run.
  • the branching points can thus be deliberately introduced into certain supply and / or discharge channels in order to preferably influence, in particular control, a mass flow distribution within the active area of the bipolar plate in a targeted manner.
  • the supply channels and / or the discharge channels and / or the distribution channels have a varying cross-sectional area to vary the hydraulic diameter.
  • the hydraulic diameter (DH) of a feed, discharge or distribution channel results from the quotient of four times the cross-sectional area (A q ) and the wetted circumference (U)
  • the supply channels and / or the discharge channels and / or the distribution channels have a variable wettable circumference to vary the hydraulic diameter.
  • the wettable circumference can be varied, for example, via the outer contour of the feed, discharge or distribution channel in question.
  • a cooling system for dissipating heat of reaction, the cooling system preferably having a plurality of cooling channels, the cooling channels in particular between the distribution channels and / or between the supply channels and / or are arranged between the discharge channels.
  • the cooling system is designed and arranged within the bipolar plate in such a way that a variation of the cooling conditions within the Cooling system a substantially constant mass flow is guaranteed within the distribution channels in the distribution of the fluids over the active area.
  • the cooling conditions can preferably be varied by varying the coolant temperature or the coolant pressure. For example, by varying the coolant temperature or the coolant pressure, certain areas of the bipolar plate can be cooled more effectively, which can then lead to an increase in the mass flow in the relevant areas, so that a mass flow can be adjusted accordingly.
  • an arrangement for actively adapting a mass flow within the supply channels and / or the discharge channels and / or the distribution channels is provided, the arrangement preferably comprising a valve control .
  • a simple and precisely adjustable, in particular targeted, adaptation can thus be carried out via a valve control.
  • a detection unit is provided for detecting a parameter for determining a current mass flow, wherein the detection unit can preferably include at least one sensor for detecting such a parameter.
  • a processing unit for determining a necessary adjustment time for adapting a mass flow based on the parameters detected by the detection unit and / or a control unit for triggering an adjustment based on the adjustment time determined by the processing unit can advantageously be provided.
  • the invention can also provide that the bipolar plate is designed in such a way that an adaptation of a mass flow within the supply channels and / or the discharge channels and / or the distribution channels takes place automatically, the adaptation preferably being controllable via a self-regulating control loop.
  • a Self-regulating control circuit can be designed, for example, in such a way that the bipolar plate according to the invention is at least partially in the form of an intelligent material that changes its diameter independently, in particular in a temperature-controlled manner, in such a way that an automatic adjustment of a mass flow within the active area can be achieved.
  • the invention also relates to a method for optimizing a mass flow within a bipolar plate, in particular a bipolar plate described above.
  • the method comprises the steps of acquiring a parameter for determining a current mass flow by means of a detection unit, determining a necessary adjustment time for adapting a mass flow on the basis of the parameters recorded by the detection unit by means of a processing unit and adapting a mass flow within the feed channels and / or the discharge channels and / or the distribution channels on the basis of the adaptation time determined by the processing unit by means of a control unit.
  • the detection unit, the processing unit and the control unit can also be in the form of a self-regulating mechanism in which an automatic adjustment takes place.
  • the invention also relates to a fuel cell comprising a plurality of the above-described bipolar plates.
  • a motor vehicle comprising a fuel cell described above, in particular comprising a plurality of bipolar plates described above, is claimed in the present case.
  • Show it: 1 shows a schematic representation of a fuel cell stack, comprising a plurality of fuel cells connected to one another,
  • FIG. 2 shows a schematic representation of the distribution structure of a bipolar plate according to the invention in a top view according to a first exemplary embodiment
  • FIG. 3 a, b, c a schematic representation of a cross section of the bipolar plate according to the invention along the section line X-X according to a first embodiment (a), a second embodiment (b) and a third embodiment (c),
  • FIG. 4 shows a schematic representation of the individual steps of a method according to the invention for optimizing a mass flow within the bipolar plate.
  • the fuel cell 1 shows a schematic illustration of a fuel cell stack 1, comprising a plurality of fuel cells interconnected with one another.
  • the fuel cells 1‘ each have a regular arrangement (not recognizable here), comprising a polymer membrane, a catalyst layer arranged on both sides of the polymer membrane, a gas diffusion layer arranged in each case on the catalyst layer and a bipolar plate 2 arranged in each case on the gas diffusion layer.
  • FIG. 2 shows a schematic representation of the distribution structure of a bipolar plate 2 in a top view according to a first exemplary embodiment.
  • the mass flow optimized bipolar plate 2 comprises an active area 4 with a plurality of juxtaposed distribution channels 6 for distributing a fluid to an electrode surface 20, a supply area 8 with a plurality of supply channels 10 for supplying the fluid to the distribution channels 6, a Discharge area 12 with a plurality of discharge channels 14 for discharging the fluid from the distribution channels 6, wherein the distribution channels 6 have the same length L and wherein the individual supply channels 10 and discharge channels 14 have a different length L at least in part.
  • the mass flow-optimized bipolar plate 2 according to the invention is characterized in that the distribution channels 6 differ at least partially with regard to their hydraulic diameter DH in order to ensure an essentially constant mass flow within the active area 4.
  • the feed channels 10 and / or the discharge channels 14 and / or the distribution channels 6 can be designed in relation to each other in such a way that a variation in the length L of the feed channels 10 and / or the discharge channels 14 and a variation in the hydraulic diameter D H of the feed channels 10 and / or the discharge channels 14 and / or the distribution channels 6, a substantially constant mass flow can be ensured within the distribution channels 6 during the distribution of the fluids over the active region 4.
  • the feed channels 10 and / or the discharge channels 14 can have branch points that cannot be seen in the present case and that can run either inside or outside the plane of the distribution channels 6.
  • the quotient of length L and hydraulic diameter DH is preferably constant, that is to say the same size, for all feed channels 10.
  • the hydraulic diameter DH of all distribution channels 6 at the inlet of the active area 4 also corresponds to the hydraulic diameter DH of the respectively associated supply channel 10; that is, along the flow path of the fluid, there is no jump in the hydraulic diameter DH at the transition from the supply channels 10 to the distribution channels 6.
  • the mass flow-optimized bipolar plate 2 also has a cooling system 22 for dissipating reaction heat, which comprises a plurality of cooling channels 24, which are not only, as explicitly shown here, within the active area 4, but also within the supply - And discharge area 8, 12 are arranged.
  • the cooling system 22 is here designed and arranged within the bipolar plate 2 in such a way that a substantially constant mass flow is achieved via a variation of the cooling conditions within the cooling system 22 can be ensured within the distribution channels 6 during the distribution of the fluids over the active region 4.
  • FIG 3 shows a schematic representation of a cross section of the bipolar plate 2 according to the invention along the section line X-X according to a first embodiment (a), a second embodiment (b) and a third embodiment (c).
  • the hydraulic diameter DH can be changed on the basis of a variation of a varying cross-sectional area A q or a varying wettable circumference U.
  • the hydraulic diameter DH is defined here as 4Aq / U.
  • the hydraulic diameter DH can be adapted via a varying cross-sectional area A q , ie the geometric shape, or via a changed contour, so that a mass flow within the distribution channels 6 can be adapted by adapting these parameters to ensure a homogeneous exchange of the fluids at an electrode surface 20.
  • an adaptation of the mass flow can also take place via parameters of the cooling system 22 or an adaptation of the cooling channel geometry 24.
  • FIG. 4 shows a schematic representation of the individual steps of a method according to the invention for optimizing a mass flow within a bipolar plate 2.
  • a parameter for determining a current mass flow is recorded by means of a detection unit, a necessary adjustment point in time for adapting a mass flow is determined 32 on the basis of the parameters recorded by the detection unit by means of a processing unit and a mass flow within the feed channels is adapted 10 and / or the discharge channels 14 and / or the distribution channels 6 on the basis of the adaptation time determined by the processing unit by means of a control unit.

Landscapes

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

Abstract

L'invention concerne une plaque bipolaire à écoulement massique optimisée (2) comprenant une zone active (4) avec une pluralité de canaux de distribution (6), qui sont disposés les uns à côté des autres, pour distribuer un fluide à une surface d'électrode (20), une zone d'alimentation (8) avec une pluralité de canaux d'alimentation (10) pour fournir le fluide aux canaux de distribution (6), une région de décharge (12) avec une pluralité de canaux de décharge (14) pour évacuer le fluide à partir des canaux de distribution (6), les canaux de distribution (6) ont la même longueur (L), les canaux d'alimentation individuels (10) et des canaux de décharge (14) ont une longueur différente (L) au moins dans certains cas, et les canaux de distribution (6) diffèrent par rapport à leur diamètre hydraulique (DH) au moins dans certains cas afin de garantir un débit massique sensiblement constant à l'intérieur de la zone active (4).
PCT/EP2021/053697 2020-03-11 2021-02-16 Plaque bipolaire à écoulement massique optimisé WO2021180431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020203066.9 2020-03-11
DE102020203066.9A DE102020203066A1 (de) 2020-03-11 2020-03-11 Bipolarplatte mit optimiertem Massenstrom

Publications (1)

Publication Number Publication Date
WO2021180431A1 true WO2021180431A1 (fr) 2021-09-16

Family

ID=74666710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/053697 WO2021180431A1 (fr) 2020-03-11 2021-02-16 Plaque bipolaire à écoulement massique optimisé

Country Status (2)

Country Link
DE (1) DE102020203066A1 (fr)
WO (1) WO2021180431A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050191541A1 (en) * 2004-02-04 2005-09-01 Vladimir Gurau Fuel cell system with flow field capable of removing liquid water from the high-pressure channels
DE102007008474A1 (de) * 2006-02-27 2007-10-18 GM Global Technology Operations, Inc., Detroit Ausgeglichene Wasserstoffzufuhr für eine Brennstoffzelle
DE102008033211A1 (de) * 2008-07-15 2010-01-21 Daimler Ag Bipolarplatte für eine Brennstoffzellenanordnung, insbesondere zur Anordnung zwischen zwei benachbarten Membran-Elektroden-Anordnungen
DE102014206682A1 (de) 2014-04-07 2015-10-08 Volkswagen Aktiengesellschaft Bipolarplatte und Brennstoffzelle
DE102014217050A1 (de) * 2014-08-27 2016-03-03 Volkswagen Aktiengesellschaft Bipolarplatte und Brennstoffzelle
DE102015015229A1 (de) * 2014-12-01 2016-06-02 Christian Martin Erdmann Brennstoffzellenstapel, Brennstoffzellensystem und Fahrzeug
DE102016107906A1 (de) * 2016-04-28 2017-11-02 Volkswagen Aktiengesellschaft Bipolarplatte aufweisend Reaktantengaskanäle mit variablen Querschnittsflächen, Brennstoffzellenstapel sowie Fahrzeug mit einem solchen Brennstoffzellenstapel
DE102016111638A1 (de) * 2016-06-24 2017-12-28 Volkswagen Ag Bipolarplatte mit variabler Breite der Reaktionsgaskanäle im Eintrittsbereich des aktiven Bereichs, Brennstoffzellenstapel und Brennstoffzellensystem mit solchen Bipolarplatten sowie Fahrzeug
US20180233765A1 (en) * 2011-03-01 2018-08-16 Imperial Innovations Limited Fuel cell comprising at least two stacked printed circuit boards with a plurality of interconnected fuel cell units

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050191541A1 (en) * 2004-02-04 2005-09-01 Vladimir Gurau Fuel cell system with flow field capable of removing liquid water from the high-pressure channels
DE102007008474A1 (de) * 2006-02-27 2007-10-18 GM Global Technology Operations, Inc., Detroit Ausgeglichene Wasserstoffzufuhr für eine Brennstoffzelle
DE102008033211A1 (de) * 2008-07-15 2010-01-21 Daimler Ag Bipolarplatte für eine Brennstoffzellenanordnung, insbesondere zur Anordnung zwischen zwei benachbarten Membran-Elektroden-Anordnungen
US20180233765A1 (en) * 2011-03-01 2018-08-16 Imperial Innovations Limited Fuel cell comprising at least two stacked printed circuit boards with a plurality of interconnected fuel cell units
DE102014206682A1 (de) 2014-04-07 2015-10-08 Volkswagen Aktiengesellschaft Bipolarplatte und Brennstoffzelle
DE102014217050A1 (de) * 2014-08-27 2016-03-03 Volkswagen Aktiengesellschaft Bipolarplatte und Brennstoffzelle
DE102015015229A1 (de) * 2014-12-01 2016-06-02 Christian Martin Erdmann Brennstoffzellenstapel, Brennstoffzellensystem und Fahrzeug
DE102016107906A1 (de) * 2016-04-28 2017-11-02 Volkswagen Aktiengesellschaft Bipolarplatte aufweisend Reaktantengaskanäle mit variablen Querschnittsflächen, Brennstoffzellenstapel sowie Fahrzeug mit einem solchen Brennstoffzellenstapel
DE102016111638A1 (de) * 2016-06-24 2017-12-28 Volkswagen Ag Bipolarplatte mit variabler Breite der Reaktionsgaskanäle im Eintrittsbereich des aktiven Bereichs, Brennstoffzellenstapel und Brennstoffzellensystem mit solchen Bipolarplatten sowie Fahrzeug

Also Published As

Publication number Publication date
DE102020203066A1 (de) 2021-09-16

Similar Documents

Publication Publication Date Title
EP1815549B8 (fr) Systeme de piles a combustible pourvu d'un separateur de liquide
DE102004007203B4 (de) Verfahren zur Herstellung eines Metallseparators für eine Brennstoffzelle und Brennstoffzelle
DE102013218144B4 (de) Brennstoffzellensystem und Verfahren zum Steuern des Brennstoffzellensystems
DE112013000896B4 (de) Gasdiffusionsschicht für eine Brennstoffzelle, Brennstoffzelle und Verfahren zur Herstellung einer Gasdiffusionsschicht für eine Brennstoffzelle
DE102008033211A1 (de) Bipolarplatte für eine Brennstoffzellenanordnung, insbesondere zur Anordnung zwischen zwei benachbarten Membran-Elektroden-Anordnungen
DE102008006726B4 (de) Brennstoffzellensystem zur Steuerung von Wasserstoffemissionen während Aufwärtstransienten und eines Kathodenpulsierens
DE102013216587B4 (de) Geometrie eines hocheffizienten Medienverteilers für eine Elektrolysezelle und einen Elektrolysestack
DE4120092C2 (de) Brennstoffzellen-Stromerzeugungseinrichtung
DE102009009177B4 (de) Wiederholeinheit für einen Brennstoffzellenstapel, Brennstoffzellenstapel und deren Verwendung
DE102019219629A1 (de) Verfahren zur Diagnose einer Temperierungseinrichtung eines Batteriepacks
WO2021180431A1 (fr) Plaque bipolaire à écoulement massique optimisé
EP1761967B1 (fr) Systeme de pile a combustible et procede pour faire fonctionner ce dernier
EP1713140B1 (fr) Procédé de détection d'un manque de réactant dans une pile à combustible d'un bloc de pile à combustible et un système de pile à combustible avec un tel bloc de pile à combustible
DE102016109754A1 (de) Brennstoffzelle
WO1999044248A1 (fr) Distributeur de gaz pour pile a combustible
EP1575113A2 (fr) Assemblage de piles à combustible et procédé pour faire opérer un assemblage de piles a combustible
DE10100757A1 (de) Elektrochemischer Brennstoffzellenstapel
DE102018215723A1 (de) Temperaturabsenkung zur Leitwertreduzierung
DE102008007058B4 (de) Verfahren zum Steuern der relativen Feuchte in einer elektrochemischen Umwandlungseinrichtung
EP2036154B1 (fr) Installation à pile à combustible et procédé d'exploitation d'une installation à pile à combustible
DE102017108440A1 (de) Elektrochemievorrichtung und Verfahren zum Betrieb einer Elektrochemievorrichtung
EP1746678A1 (fr) Procédé pour évacuation de l'eau et des gaz inertes dans un assemblage de piles à combustible et assemblage de piles à combustible
DE102010048152B4 (de) Fluidregelsystem für einen Brennstoffzellenstapel sowie damit ausgestattete Brennstoffzellenanordnung
EP4047696A1 (fr) Interconnecteur à empilement de soc et système à empilement de soc
DE102018200687A1 (de) Kaskadierter Brennstoffzellenstapel und Brennstoffzellensystem

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21706228

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21706228

Country of ref document: EP

Kind code of ref document: A1