EP1230701A1 - Empilement de piles a combustible electrochimiques - Google Patents

Empilement de piles a combustible electrochimiques

Info

Publication number
EP1230701A1
EP1230701A1 EP00983062A EP00983062A EP1230701A1 EP 1230701 A1 EP1230701 A1 EP 1230701A1 EP 00983062 A EP00983062 A EP 00983062A EP 00983062 A EP00983062 A EP 00983062A EP 1230701 A1 EP1230701 A1 EP 1230701A1
Authority
EP
European Patent Office
Prior art keywords
cathode
cooling medium
area
gas
fuel cell
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.)
Withdrawn
Application number
EP00983062A
Other languages
German (de)
English (en)
Inventor
Ottmar Schmid
Cosmas Heller
Udo Martin
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1230701A1 publication Critical patent/EP1230701A1/fr
Withdrawn legal-status Critical Current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
    • H01M8/04—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
    • H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
    • 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
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
    • 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
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0082—Organic polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • 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
    • H01M8/04—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
    • 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
    • H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
    • H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
    • 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 an electrochemical fuel cell stack according to the preamble of patent claim 1.
  • Prior art fuel cell stacks include at least one, but usually a plurality of individual fuel cells that are stacked next to or on top of one another.
  • a single cell consists of the so-called membrane electrode unit, abbreviated as MEA, of anode, cathode and a proton-conducting electrolyte membrane arranged between them.
  • MEA membrane electrode unit
  • Another gas distribution structure with channels for guiding the cathode gas is provided on the cathode side. In particular, it contains oxygen and water, some of which is formed in the electrochemical reaction at the cathode.
  • the gas distributor structures are usually in the form of a channel structure on the surface of a e.g. metallic, plate realized.
  • the anode-side gas distributor structure of an individual cell and the cathode-side gas distributor structure of the adjacent cell are usually carried out on the two flat sides of the same plate.
  • cooling chambers are provided within the stack, through which a liquid or gaseous cooling medium flows. These can be arranged anywhere in the stack and within a single cell. For example, a cooling chamber can be assigned to each individual cell. However, it is also possible for a plurality of individual cells to be assigned to one cooling chamber.
  • FIG. 1 shows a fuel cell stack with convective liquid water cooling in accordance with the prior art.
  • a liquid cooling medium in particular water, through which inside the fuel cell stack.
  • Stacked arranged cooling chambers passed. After leaving the stack, it will heated cooling water to dissipate the heat taken into a cooler.
  • These known fuel cell stacks are preferably operated with a small temperature difference in the cooling water between inlet and outlet of approximately 10 ° C. in order to keep the cooler as compact as possible for removing the fuel cell waste heat.
  • this fuel cell stack is also preferably operated at temperatures greater than 60 ° C. in order to achieve sensible efficiencies, the known versions of the cathode water vapor can be condensed only to a very small extent within the fuel cell stack.
  • An additional heat exchanger is therefore arranged outside the fuel cell stack, with which the water vapor present in the cathode gas is condensed. This serves e.g. the purpose of maintaining the water balance across the entire fuel cell system.
  • the object of the present invention is to provide a fuel cell stack with which a substantial part of the water vapor present in the cathode gas can already be condensed within the stack, so that condensation in the downstream condenser can be substantially reduced or even becomes completely unnecessary.
  • the area in which the cooling medium enters the fuel cell stack and the area in which the cathode gas emerges from the fuel cell stack overlap at least partially, so that in this area of overlap, the water vapor in the cathode exhaust gas can be condensed out. Condensation of the water vapor within the stack is thus achieved, so that a separate condenser for condensation is dispensed with can be, or this can be dimensioned much smaller than in the known systems.
  • the essential material conversion of the electrochemical fuel cell reaction basically occurs in the entry area of the cathode gas.
  • low dew points typically below 40 ° C.
  • the cooling medium inlet area and the cathode gas outlet area By covering the cooling medium inlet area and the cathode gas outlet area according to the invention, low dew points (typically below 40 ° C.) are reached in the area of the cover, which lead to the desired strong condensation of the water vapor in the cathode gas.
  • only a small amount of heat is absorbed by the cooling medium in the entry area of the cathode gas, ie where the essential conversion of the fuel cell reaction takes place.
  • the fuel cell according to the invention is advantageously operated with a gaseous cooling medium which, compared to the cooling media normally used, such as e.g. Water or Gykol has a much lower heat capacity. If higher temperature differences are desired, a defined setting of the temperature difference homogeneously across each cell of the fuel cell stack is not possible with cooling media that have a high heat capacity without a disproportionately high control effort, since only a very small and therefore poorly controllable coolant flow is required. If, on the other hand, you choose a coolant with a lower heat capacity, a higher coolant flow, which is much easier to regulate, is necessary to maintain the same temperature difference.
  • a gaseous cooling medium which, compared to the cooling media normally used, such as e.g. Water or Gykol has a much lower heat capacity.
  • This Adaptation can be carried out by locally restricted measures in the area of the overlap of the coolant inlet area and the cathode gas outlet area or complementary thereto in the remaining area of the cell. These measures can be, for example, an adaptation of the geometry with regard to the channels. In particular, the channel cross section, number of channels per area or the arrangement of the channels can be spatially varied. Further possible geometrical adjustments concern the influencing of the contact surface by ribs, webs, grooves or needles or the like in the flow channels.
  • a material with good thermal conductivity can be present in the area of condensation in the inlet area of the cooling medium and / or a material with poor thermal conductivity in the remaining area of the cell.
  • the materials can be applied both in layer form to the surface of the channels, and can also be introduced into the carrier material itself.
  • FIG. 5 shows the voltage-current density characteristics of a fuel cell stack according to the invention in comparison to a known fuel cell stack
  • FIG. 6 shows an embodiment of the fuel cell stack according to the invention with locally adapted channel geometry in the area of the condensation; 7 shows an embodiment of the fuel cell stack according to the invention with locally adapted use of heat-conducting / heat-insulating materials. 8 shows an embodiment of the fuel cell stack according to the invention with separate guidance of cathode gas and cooling medium;
  • FIG 9 shows an embodiment of the fuel cell stack according to the invention, in which a part of the cooling medium flows through the cathode-side gas distributor structure as cathode gas after flowing through the cooling medium distributor structure.
  • Fig. 2 shows a first embodiment of the fuel cell stack according to the invention in a schematic representation.
  • a plate is shown, e.g. Made of metal, on the surface of which a gas distributor structure for the cathode gas is incorporated.
  • the gas distribution structure is only shown schematically here. It consists of one or more serpentine or meandering channels, as are known per se to the person skilled in the art.
  • the cathode gas enters the cell through an opening, passes through the flow channel or channels and exits the cell again at the diagonally opposite opening.
  • inlet area and outlet area of a fluid in the sense of the present invention are to be understood to mean not only the immediate area of the perforations, but also their closer surroundings, measured along the fluid flow. In this area, the metabolism due to the electrochemical fuel cell reaction is very low or practically no longer available. In the example shown, e.g. the section of the flow channel from the last change of direction to the opening with the cathode gas outlet area.
  • the cooling medium in this embodiment essentially enters the cell over the entire edge length of the plate and flows in cross flow to the cathode gas (the cooling medium flows on a distributor structure on the back of the plate shown).
  • the cooling medium inlet area and cathode gas outlet area overlap to a large extent. This area of coverage where the condensation takes place is outlined.
  • the ambient air is used as the cooling medium.
  • Typical temperatures for cathode gas and cooling medium at the inlet and outlet are also shown. It can be seen that the temperature differences between inputs and leakage in both fluids - compared to the known fuel cells - are relatively high. The temperature differences are in the range from 30 to 45 ° C. Dew points below 40 ° C are reached at the cathode gas outlet. This saves a separate condenser for condensing the water in the cathode gas.
  • FIG. 3 Another embodiment according to the invention is shown in FIG. 3. It differs from the embodiment shown in FIG. 2 essentially only in another gas distributor structure. This is designed as a parallel gas distributor structure.
  • the gaseous cooling medium e.g. ambient air
  • the cooling medium inlet area and cathode gas outlet area overlap in essential parts. This area of coverage where the condensation takes place is outlined.
  • the air cooling can advantageously be carried out via a radiator.
  • 4 shows a corresponding embodiment.
  • the radiator is arranged directly in front of the fuel cell stack and blows the air into the cooling channels or cooling chambers of the fuel cell stack.
  • the cooling air to be supplied to the stack can also be conveyed into the stack from the radiator via a line.
  • FIG. 5 shows the voltage-current density characteristics of a fuel cell stack according to the invention with air cooling in comparison to a known fuel cell stack with water cooling.
  • the values shown were obtained by measurements on a cell stack from ten fuel cells ("10-cell").
  • Graphite was used as the base material for the bipolar plates. It can be seen that the two characteristics are almost identical. The in-stack condensation of the water vapor obtained according to the invention can thus be achieved without loss of efficiency.
  • 6 shows a further embodiment according to the invention. A plate is shown, on the side facing away from the viewer, the gas distributor structure shown in FIG. 2 or 3 for guiding the cathode gas is present. The distributor structure for the cooling medium is shown on the side facing the viewer.
  • the cathode gas enters the cell through an opening in the plate, passes through the flow channel (s) (not visible here) and exits the cell at the diagonally opposite opening.
  • the cooling medium enters the cooling channels at the lower edge of the plate and leaves them at the opposite edge.
  • the area of coverage of the cooling medium inlet area and cathode gas outlet area, in which the condensation essentially takes place, is bordered. In this area of coverage, additional ribs are arranged within the channels in order to enlarge the contact area. This increases the heat exchange between the coolant and cathode gas in this area and thus has a favorable influence on the condensation.
  • FIG. 7 shows an embodiment of the invention with which the local heat exchange over the cell surface is varied by additional measures.
  • the structure of the plate corresponds to that shown in FIG. 6 with the exception of the ribs not present here in the area of the condensation, so that reference is made to avoid repetition.
  • a heat-insulating layer is present on the channel surface within the area of coverage of the cooling medium inlet area and cathode gas outlet area.
  • the heat exchange can be reduced in this area by appropriate selection of layer thickness and layer material in order to avoid possibly undesirable high temperature gradients in the condensation area.
  • This layer can e.g. be a self-supporting layer or film that is glued to the surface. However, it is also possible to apply a thin layer of lacquer or to introduce the additional material directly into the carrier layer.
  • heat-insulating materials can be used in the device according to FIG. 6 or 7 in the area outside the overlap of the cooling medium inlet area and the cathode gas outlet area.
  • MEA denotes the membrane-electrode assembly, which on the one hand is adjacent to the anode-side gas distributor structure AS and on the other hand from the cathode-side gas distributor structure KS.
  • a cooling medium distribution structure KK also referred to as a cooling chamber.
  • the cooling medium eg air, flows through the cooling chambers KK and is fed in and out above and below the stack.
  • the cathode gas flows through the individual cathode-side gas distributor structures KS.
  • the cooling channels in the cooling medium distribution structure KK advantageously as short as possible and therefore executed in parallel (without meanders or serpentines).
  • a cooling air flow directed vertically upward is advantageously present in the stack, so that the cooling air flow is supported by the thermals that occur.
  • FIG. 9 shows a further embodiment of the fuel cell stack according to the invention, in which part of the cooling medium is used as cathode gas after flowing through the cooling medium distributor structure.
  • the sequence of the components membrane-electrode unit MEA, cathode-side gas distributor structure KS, anode-soapy gas distributor structure AS, cooling medium distributor structure KK within the stack corresponds to FIG. 8.
  • the pre-compressed cooling air flow flows - advantageously from below - through parallel cooling channels of the cooling medium distributor structure and, after exiting the cooling medium distributor structure, reaches a chamber above the fuel cell stack.
  • Part of the cooling air is passed on from this chamber to the gas distributor structure on the cathode side, supplies the cathode with oxygen and finally exits the FC stack through one or more openings, which are advantageously arranged on the side.
  • the excess cooling air flow leaves the upper chamber, for example, via a flow or pressure-controlled valve and goes directly into the environment.
  • Another gas can also be used as the cooling medium instead of air, e.g. by gases that occur within the fuel cell system at low temperature.

Landscapes

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

Abstract

La présente invention concerne un empilement de piles à combustible électrochimiques, comprenant au moins une unité membrane-électrodes, constituée d'une anode, d'une cathode et d'une membrane électrolytique disposée entre ces dernières, au moins une structure de distribution de gaz, côté anode, présentant une zone d'entrée de gaz d'anode, une zone de sortie de gaz d'anode, ainsi que des canaux permettant de conduire le gaz d'anode de la zone d'entrée de gaz d'anode à la zone de sortie de gaz d'anode, ledit gaz d'anode contenant de l'hydrogène, au moins une structure de distribution de gaz, côté cathode, présentant une zone d'entrée de gaz de cathode, une zone de sortie de gaz de cathode, ainsi que des canaux permettant de conduire le gaz de cathode de la zone d'entrée de gaz de cathode à la zone de sortie de gaz de cathode, ledit gaz de cathode contenant de l'oxygène et de la vapeur d'eau, - une structure de distribution de milieu de refroidissement, présentant une zone d'entrée de milieu de refroidissement, une zone de sortie de milieu de refroidissement, ainsi que des canaux permettant de conduire le milieu de refroidissement de la zone d'entrée de milieu de refroidissement à la zone de sortie de milieu de refroidissement. Selon cette invention, la zone d'entrée de milieu de refroidissement et la zone de sortie de gaz de cathode se recouvrent au moins partiellement, de façon qu'une condensation de la vapeur d'eau dans le gaz d'échappement de cathode peut se produire dans cette zone de recouvrement.
EP00983062A 1999-11-06 2000-10-26 Empilement de piles a combustible electrochimiques Withdrawn EP1230701A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953404 1999-11-06
DE19953404A DE19953404B4 (de) 1999-11-06 1999-11-06 Elektrochemischer Brennstoffzellenstapel
PCT/DE2000/003782 WO2001035476A1 (fr) 1999-11-06 2000-10-26 Empilement de piles a combustible electrochimiques

Publications (1)

Publication Number Publication Date
EP1230701A1 true EP1230701A1 (fr) 2002-08-14

Family

ID=7928101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00983062A Withdrawn EP1230701A1 (fr) 1999-11-06 2000-10-26 Empilement de piles a combustible electrochimiques

Country Status (4)

Country Link
EP (1) EP1230701A1 (fr)
JP (1) JP2003514354A (fr)
DE (1) DE19953404B4 (fr)
WO (1) WO2001035476A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224397A1 (de) * 2002-06-01 2003-12-11 Behr Gmbh & Co Brennstoffzellenstapel
DE102004051751B4 (de) * 2004-10-23 2015-11-05 Robert Bosch Gmbh Fahrzeug mit einer Brennstoffzellenanlage mit einem wasserhaltigen Fluidstrom
DE102007036477A1 (de) * 2007-08-01 2009-02-05 Behr Gmbh & Co. Kg Bipolarplatte für eine Brennstoffzelle und Brennstoffzellenstapel
EP2675005A1 (fr) * 2012-06-11 2013-12-18 HTceramix S.A. Collecte et/ou traitement de données multi-capteurs
EP2675006A1 (fr) 2012-06-11 2013-12-18 HTceramix S.A. Unité de chauffage, ventilation et/ou conditionnement de véhicule

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547776A (en) * 1991-01-15 1996-08-20 Ballard Power Systems Inc. Electrochemical fuel cell stack with concurrently flowing coolant and oxidant streams
JP3064023B2 (ja) * 1991-02-22 2000-07-12 三菱重工業株式会社 燃料電池用ガスセパレータ
JPH05144451A (ja) * 1991-11-20 1993-06-11 Fuji Electric Co Ltd 固体高分子電解質型燃料電池の反応ガス・冷却媒体通流構造
JP2760684B2 (ja) * 1991-11-29 1998-06-04 三洋電機株式会社 燃料電池の冷却プレート
JP3342079B2 (ja) * 1993-02-26 2002-11-05 三菱重工業株式会社 固体高分子電解質燃料電池
JP3337258B2 (ja) * 1993-03-08 2002-10-21 三菱重工業株式会社 固体高分子電解質燃料電池システム
JPH0831437A (ja) * 1994-07-15 1996-02-02 Toshiba Corp 燃料電池とその運転方法
DE4442285C1 (de) * 1994-11-28 1996-02-08 Siemens Ag Brennstoffzellen und daraus bestehende Brennstoffzellenbatterien
US6042955A (en) * 1995-05-25 2000-03-28 Honda Giken Kogyo Kabushiki Kaisha Fuel cell and method of controlling same
JP3580917B2 (ja) * 1995-08-30 2004-10-27 本田技研工業株式会社 燃料電池
JP3077618B2 (ja) * 1997-03-05 2000-08-14 富士電機株式会社 固体高分子電解質型燃料電池
AU2197400A (en) * 1998-12-17 2000-07-03 International Fuel Cells, Llc A cooling plate for a fuel cell stack assembly
US6171718B1 (en) * 1998-12-28 2001-01-09 International Fuel Cells, Llc Pressurized water recovery system for a fuel cell power plant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0135476A1 *

Also Published As

Publication number Publication date
JP2003514354A (ja) 2003-04-15
WO2001035476A8 (fr) 2001-06-14
DE19953404B4 (de) 2004-11-25
DE19953404A1 (de) 2001-05-23
WO2001035476A1 (fr) 2001-05-17

Similar Documents

Publication Publication Date Title
DE102006019114B4 (de) Brennstoffzellensystem zur verbesserten Wasserstoff- und Sauerstoffverwendung
DE69224116T2 (de) Festoxidbrennstoffzellensystem
DE69514364T2 (de) Stapel elektrochemischer brennstoffzellen mit gleichzeitig fliessenden kuehlmittel- und oxidantienstroemen
DE102005038928B4 (de) Brennstoffzelle vom Pakettyp
DE102006017943A1 (de) Brennstoffzellenkonstruktion mit einem integrierten Wärmetauscher und Gasbefeuchtungseinheit
DE102006009844A1 (de) Bipolarplatte, insbesondere für einen Brennstoffzellenstapel eines Fahrzeugs
DE10055253B4 (de) Brennstoffzellenstapel
DE102005031081A1 (de) Bipolarplatte, Verfahren zur Herstellung einer Bipolarplatte und Brennstoffzellenblock-Anordnung
EP1352439B1 (fr) Empilement de piles a combustible pem a structure de repartition de fluide refrigerant
DE19743067C2 (de) Strömungsmodul mit Strömungskammern für drei oder vier Fluide
EP1378018B1 (fr) Empilement de cellules electrochimiques
DE19953404B4 (de) Elektrochemischer Brennstoffzellenstapel
EP1523781B1 (fr) Pile a combustible munie d'une regulation de gaz interne
WO2001009969A1 (fr) Systeme de refroidissement de cellules a combustible
WO2003090301A2 (fr) Plaque d'electrodes comportant une zone d'humidification
DE102006046725A1 (de) Wassermassenausgleichsschema für Brennstoffzellensysteme
EP4205205A1 (fr) Empilement de piles à combustible
DE10126723A1 (de) Interkonnektor für eine Brennstoffzelle
DE10323647B4 (de) Anordnung und Verfahren zum Kühlen eines Brennstoffzellenstapels
DE102018205995A1 (de) Vorrichtung zur Konditionierung des Kathodengases und Brennstoffzellensystem mit einer solchen Vorrichtung
DE102022103985B3 (de) Bipolarplatte, Brennstoffzellenvorrichtung und Verfahren zum Betreiben der Brennstoffzellenvorrichtung
DE102021123184B3 (de) Festoxid-Brennstoffzellenvorrichtung
DE102023117512A1 (de) Bipolarplatte und Niedertemperatur-Polymerelektrolytmembran-Brennstoffzelle
DE10315758A1 (de) PEM-Brennstoffzelle
DE10015362A1 (de) Brennstoffzellenstapel für flüssigen oder teilweise flüssigen Brennstoff

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020606

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20030519

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050503