WO2009079993A1 - Procédé et dispositif pour faire fonctionner une cellule à combustible - Google Patents

Procédé et dispositif pour faire fonctionner une cellule à combustible Download PDF

Info

Publication number
WO2009079993A1
WO2009079993A1 PCT/DE2008/002089 DE2008002089W WO2009079993A1 WO 2009079993 A1 WO2009079993 A1 WO 2009079993A1 DE 2008002089 W DE2008002089 W DE 2008002089W WO 2009079993 A1 WO2009079993 A1 WO 2009079993A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel cell
cell stack
fuel
methanol
line
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.)
Ceased
Application number
PCT/DE2008/002089
Other languages
German (de)
English (en)
Inventor
Morten H. Christensen
Martin Zipkat
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.)
Sabik Informationssysteme GmbH
Original Assignee
Sabik Informationssysteme 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 Sabik Informationssysteme GmbH filed Critical Sabik Informationssysteme GmbH
Publication of WO2009079993A1 publication Critical patent/WO2009079993A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04186—Arrangements for control of reactant parameters, e.g. pressure or concentration of liquid-charged or electrolyte-charged reactants
    • H01M8/04194—Concentration measuring cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • H01M8/04365—Temperature; Ambient temperature of other components of a fuel cell or fuel cell stacks
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0444—Concentration; Density
    • H01M8/04447—Concentration; Density of anode reactants at the inlet or inside the fuel cell
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04537—Electric variables
    • H01M8/04544—Voltage
    • H01M8/04559—Voltage of fuel cell stacks
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04537—Electric variables
    • H01M8/04574—Current
    • H01M8/04589—Current of fuel cell stacks
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04537—Electric variables
    • H01M8/04604—Power, energy, capacity or load
    • H01M8/04619—Power, energy, capacity or load of fuel cell stacks
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04746—Pressure; Flow
    • H01M8/04753—Pressure; Flow of fuel cell 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04791—Concentration; Density
    • H01M8/04798—Concentration; Density of fuel cell 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
    • 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 method for operating a fuel cell according to the preamble of claim 1 and an associated apparatus according to the preamble of claim 9.
  • Such methods for operating a fuel cell and the associated devices are used to control the supply units of fuel cells.
  • a fuel cell is used as an environmentally friendly and high-efficiency power source in which chemical energy is converted directly into electrical energy by an electrochemical oxidation of an easily oxidizable substance (eg hydrogen, hydrazine, methanol) with an oxidizing agent (eg oxygen, air) ,
  • an easily oxidizable substance eg hydrogen, hydrazine, methanol
  • an oxidizing agent eg oxygen, air
  • the fuel cell has an electrolyte and two electrodes, wherein at the anode, the oxidizable substance and at the cathode, the oxidizing agent are supplied continuously.
  • a low-temperature fuel cell (0-150 0 C)
  • a medium-temperature fuel cell 150-250 0 C
  • a direct methanol fuel cell has an anode compartment and a cathode compartment separated by a proton-conducting membrane. An aqueous methanol solution is continuously fed into the anode compartment and air is continuously fed into the chamber, resulting in carbon dioxide in the anode compartment and water in the cathode compartment.
  • the mixing of the methanol / water mixture is realized in a fuel tank, wherein the fuel tank is connected to the anode space of the fuel cell such that the methanol / water mixture in the circuit between the fuel tank and anode space by means of a pump or convective, due to the temperature difference and / or the density difference of the methanol / water mixture between the fuel tank and the anode compartment or due to the rising of the carbon dioxide bubbles from the anode compartment into the fuel tank circulates.
  • the methanol / water mixture is continuously removed from the fuel tank and conveyed into the anode compartment. At the same time unused and diluted methanol / water mixture is returned from the anode compartment back into the fuel tank.
  • the respective supply of methanol and water in the fuel tank also takes place via pumps, wherein the addition of the methanol and water in the fuel tank can basically be continuous or discontinuous. Both in the continuous and in the discontinuous addition is crucial that the methanol concentration in the methanol / water mixture is not too low and not too high. If the methanol concentration in the methanol / water mixture is too low, the voltage of the fuel cell or of the fuel cell stack collapses. In contrast, too high methanol concentration in the methanol / water mixture leads to a poorer efficiency of the fuel cell or the fuel cell stack, because methanol losses occur by permeation of the methanol through the membranes of the fuel cell or the fuel cell stack.
  • DE 197 01 560 C2 proposes a regulation of the methanol demand pump with a sensor which measures the ratio of water to methanol in the anode feed line.
  • a sensor which measures the ratio of water to methanol in the anode feed line.
  • such regulations are complicated and expensive due to the use of the methanol sensor and the regulator.
  • the sensors used are inaccurate and of low life, so that this technical solution has a high maintenance.
  • DE 10 2004 061 656 A1 discloses a fuel cell stack and a method for operating such in which, during operation of the fuel cell stack, the electrical voltage of the fuel cell is tapped and a two-position controller is activated with it, the two-position controller in turn activating the methanol pump.
  • two operating points are set, which an inflow with a first methanol concentration Set C u and a second methanol concentration C 0 in the anode space of the fuel cell stack, where 0> C 11 >Q> applies.
  • the methanol pump is switched on when the measured electric voltage of the fuel cell falls below a lower limit.
  • the methanol pump then remains in operation until an upper limit is exceeded.
  • the two limit values are constant values which were determined once from the current-voltage characteristic of the fuel cell stack.
  • Adaptive characteristic models should also take into account the temperature and aging of the fuel cells, thus keeping the methanol concentration in the anode compartment within an optimal range.
  • Another disadvantage is that in this method, the actual changes in the electrical current are not taken into account, since the current-voltage characteristic was determined only for a specific load case. Does the load condition, z. B. in which another consumer is connected to the fuel cell stack, so the fixed constant limits no longer reflect the optimal values. For a correction of these limits then the current-voltage characteristic would have to be re-determined for each load case.
  • the decisive disadvantage is that in this method, even with the adaptive characteristic models, the temperature and the aging of the fuel cells are not or only approximately taken into account, since the actual operating conditions are not included in the current-voltage characteristic.
  • the invention is therefore based on the object to develop a generic method for operating a fuel cell and an associated device that adjusts itself while taking into account the temperature and aging of the fuel cell.
  • the new method for operating a fuel cell and the associated device eliminate the disadvantages of the prior art.
  • Advantageous in the application of the new method for operating a fuel cell is that the methanol concentration of the fuel cell stack supplied fuel is adjusted in dependence on the electric power generated by the fuel cell stack, because thereby the operation of the fuel cell, the temperature and the aging of the Fuel cells are taken into account and therefore the fuel cell stack is operated with a respective optimum efficiency.
  • the electrical power generated by the fuel cell stack over a period of time is measured, because thereby the electrical power at the beginning and at the end of the period are comparable and depending on this comparison, the methanol concentration of the fuel cell stack supplied fuel is adjustable , It is also advantageous if the methanol concentration to be set of the fuel cell stack supplied fuel from the measured electrical power of the preceding period is determined, because then the adjustment of the methanol concentration of the fuel cell stack supplied fuel takes place in a timely influence.
  • a control unit on the input side each with a device for consumer-side current measurement of the fuel cell stack and a device for consumer-side voltage measurement of the fuel cell stack and the output side via a line with the electric drive of the methanol pump is electrically connected because the device for consumer-side current measurement of the fuel cell stack is an ammeter and the device for consumer-side voltage measurement of the fuel cell stack is a voltmeter or these two Vorrich- are integrated in a DC / DC converter.
  • control unit is electrically connected on the output side to the electric drive of the water feed pump, because this also influences the methanol concentration of the fuel supplied to the fuel cell stack via the water addition into the fuel tank. It is advantageous if the control unit with a temperature sensor of the fuel cell stack and a level sensor of the fuel tank and the output side is electrically connected electrically to the electric drive of the circulation pump and via a line to the electric drive of the air pump, because this process essential operating parameters in the control unit can be.
  • Fig. 3 Exemplary characteristic with too high a concentration of the supplied fuel
  • Fig. 4 Exemplary characteristic with too low a concentration of the supplied fuel.
  • FIG. 7 Schematic representation of the fuel cell module in a fourth exemplary embodiment
  • the novel apparatus for operating a fuel cell consists in a first embodiment according to FIG. 1 of a fuel cell stack 1, each connected via a fuel supply line 2 and a fuel discharge 3 with a fuel tank 4 and an air supply line 5 with an open air filter 6 to the atmosphere is.
  • the fuel tank 4 is in turn connected via a water supply line 9 with a water storage tank 10 and a methanol supply line 11 with a methanol storage tank 12, wherein in the water supply line 9, a water pump 13 and in the methanol feed 11 a methanol pump 14 are arranged such that the conveying directions of the water pump 13th and methanol pump 14 to the fuel tank 4.
  • the fuel cell stack 1 On the power side, the fuel cell stack 1 is electrically connected to a load 15 via a positive line 16 and a negative line 17, wherein in the positive line 16, an ammeter 18 on the input side and between the positive line 16 and the negative line 17, a voltmeter 19 are arranged on the input side.
  • the outputs of the ammeter 18 and voltmeter 19 are electrically connected via the lines 20 and 21, respectively, to an input of a control unit 22.
  • the output of the control unit 22 via the line 23 to the electric drive of the methanol pump 14 is electrically connected.
  • methanol is periodically fed from the methanol storage tank 12 into the fuel tank 4 by temporarily controlling the electric drive of the methanol feed pump 14, the time interval between the methanol additions being a mixing time t M.
  • This mixing time t M is a constant period, which results from the filling volume of the fuel tank 4 and exemplarily has a value between 7 and 10 minutes, preferably 8 minutes.
  • the electric current and voltage are measured during the mixing time t M via the ammeter 18 and the voltmeter 19. The measurement results are transmitted via the lines 20 and 21 to the control unit 22.
  • the electric power is calculated from the measurement results and the electric drive of the methanol pump 14 is controlled as a function of the electrical power. In this case, the control of the electric drive of the methanol pump 14 is realized for the next mixing process with the measurement results of the last mixing process.
  • FIGS. 3 and 4 show two other operating states which have been identified by way of example and in which no optimum concentration of the supplied fuel was present in the last mixing processes.
  • the reverse operating case is shown in FIG. 4.
  • the mixing time t M is changed.
  • the new device for operating a fuel cell is extended in a second embodiment according to FIG. 5 to a control of the water pump 13.
  • the control unit 22 on the output side via a line 24 is electrically connected to the electric drive of the water pump 13.
  • tration can be achieved by an increased methanol addition and / or by a reduced addition of water in the fuel tank 4.
  • control unit 22 is also the input side via a line 25 with a temperature sensor 26 of the fuel cell stack 1 and via a line 27 with a level sensor 28 of the fuel tank 4 and output side electrically connected via a line 29 to the electric drive of the circulation pump 7 and via a line 30 to the electric drive of the air pump 8.
  • the temperature measured values in the fuel cell stack 1 and, via the line 26, the fill level values in the fuel tank 4 are transmitted to the control unit 22 via the line 25.
  • the aforementioned electric drives are controlled simultaneously, which increases the methanol addition by the control of the electric drive of the methanol pump 14 and by the controls of the electric drives of the water pump 13 and the circulation pump 7, the addition of water in the fuel tank 4 and from the fuel tank. 4 Reduce the amount of fuel delivered.
  • the new device for operating a fuel cell is in a fourth embodiment according to FIG. 7 in such a way with respect to the preceding embodiment changed that between the fuel cell stack 1 and the consumer 15 a coupled to an energy storage 31 DC / DC converter 32 is arranged, wherein the current and voltage measurement data are tapped directly from the DC / DC converter 32.
  • the fuel cell stack 1 is electrically connected to the input of the DC / DC converter 32 via the positive line 16 and the minus line 17.
  • the DC / DC converter 32 is electrically connected via a further positive line 33 and a minus line 34 via the energy store 31 to the consumer 15.
  • the outputs for the current and voltage measurement data of the DC / DC converter 32 via the lines 20 and 21 are each electrically connected to an input of a control unit 22.
  • the current and voltage measurement data are tapped by the DC / DC converter 32 and the electrical power is calculated therefrom in the control unit 22. From the measurement results of the respective last mixing operation, the drives of the electric drives mentioned in the preceding embodiments are then made for the next mixing operation.
  • control unit 22 may also be electrically connected to the energy store 31 for detecting the state of charge of the energy store 31, in which function the current feed of the fuel cell stack 1 is throttled when the energy store 31 is fully charged and when the state of charge of the fuel cell is full Energy storage 31 is increased below a lower limit.
  • the convective flow can be calculated from the temperature difference and / or the density difference of the methanol / water mixture between combustion fuel tank and anode compartment and / or resulting from the rise of the carbon dioxide bubbles from the anode compartment into the fuel tank.
  • the fuel cell stack 1 is designed as a constant voltage source.
  • the total voltage or stack voltage is held by a control in an optimal range in which the fuel cell stack 1 has the maximum efficiency. This maximum efficiency is currently achieved in a direct methanol fuel cell, depending on the fuel cell type, at a cell voltage between 0.35 and 0.45V.
  • the setpoint value for the total voltage or stack voltage, corresponding to the fuel cell type is between 5.25 and 6.75 V.

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 vise à perfectionner un procédé de type générique pour faire fonctionner une cellule à combustible, et un dispositif correspondant, de façon à permettre un auto-ajustement en tenant compte de la température et du vieillissement des cellules à combustible. A cet effet, la concentration en méthanol du combustible apporté à l'empilement de cellules à combustible (1) est réglée en fonction de la puissance électrique produite par l'empilement de cellules à combustible (1). De tels procédés de fonctionnement d'une cellule à combustible, ainsi que les dispositifs correspondants, permettent de commander les unités d'alimentation de cellules à combustible.
PCT/DE2008/002089 2007-12-21 2008-12-13 Procédé et dispositif pour faire fonctionner une cellule à combustible Ceased WO2009079993A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007062165.7 2007-12-21
DE102007062165A DE102007062165A1 (de) 2007-12-21 2007-12-21 Verfahren und Vorrichtung zum Betrieb einer Brennstoffzelle

Publications (1)

Publication Number Publication Date
WO2009079993A1 true WO2009079993A1 (fr) 2009-07-02

Family

ID=40473415

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/002089 Ceased WO2009079993A1 (fr) 2007-12-21 2008-12-13 Procédé et dispositif pour faire fonctionner une cellule à combustible

Country Status (2)

Country Link
DE (1) DE102007062165A1 (fr)
WO (1) WO2009079993A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020192517A1 (en) * 2001-06-14 2002-12-19 Gerhard Beckmann Apparatus and method for rapidly increasing power output from a direct oxidation fuel cell
EP1280218A1 (fr) * 2001-07-27 2003-01-29 Abb Research Ltd. Méthode pour régler la concentration de methanol dans des piles à combustible directes au méthanol
US6565998B2 (en) * 2001-02-06 2003-05-20 General Motors Corporation Direct methanol fuel cell system with a device for the separation of the methanol and water mixture
DE102004061656A1 (de) * 2004-12-22 2006-07-06 Forschungszentrum Jülich GmbH Brennstoffzellenstapel sowie Verfahren zum Betreiben eines solchen
US20060159968A1 (en) * 2003-07-07 2006-07-20 Go Sudo Fuel cell device and fuel-feeding method for fuel cell

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701560C2 (de) 1997-01-17 1998-12-24 Dbb Fuel Cell Engines Gmbh Brennstoffzellensystem
DE19938790A1 (de) 1999-08-16 2001-02-22 Siemens Ag Bestimmung der Brennstoffkonzentration im Elektrolyt von mit flüssigem Brennstoff betriebenen Brennstoffzellen
DE19948908C2 (de) 1999-10-11 2001-10-04 Siemens Ag Verfahren zur Bestimmung der Alkoholkonzentration in Brennstoffzellen sowie ein zu dessen Durchführung geeignetes Brennstoffzellensystem
DE10058083A1 (de) * 2000-11-23 2002-06-20 Forschungszentrum Juelich Gmbh Brennstoffzellenstapel
US6650968B2 (en) * 2000-12-27 2003-11-18 Plug Power Inc. Technique to regulate an efficiency of a fuel cell system
JP4131916B2 (ja) * 2001-05-02 2008-08-13 株式会社東芝 燃料電池発電装置の運転方法
JP4432650B2 (ja) * 2004-04-26 2010-03-17 株式会社日立製作所 燃料電池電源とその運転方法および燃料電池電源を用いた携帯用電子機器
DE102006017964B4 (de) * 2006-04-13 2008-12-24 Sabik Informationssysteme Gmbh Mischeinheit für eine Brennstoffzelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6565998B2 (en) * 2001-02-06 2003-05-20 General Motors Corporation Direct methanol fuel cell system with a device for the separation of the methanol and water mixture
US20020192517A1 (en) * 2001-06-14 2002-12-19 Gerhard Beckmann Apparatus and method for rapidly increasing power output from a direct oxidation fuel cell
EP1280218A1 (fr) * 2001-07-27 2003-01-29 Abb Research Ltd. Méthode pour régler la concentration de methanol dans des piles à combustible directes au méthanol
US20060159968A1 (en) * 2003-07-07 2006-07-20 Go Sudo Fuel cell device and fuel-feeding method for fuel cell
DE102004061656A1 (de) * 2004-12-22 2006-07-06 Forschungszentrum Jülich GmbH Brennstoffzellenstapel sowie Verfahren zum Betreiben eines solchen

Also Published As

Publication number Publication date
DE102007062165A1 (de) 2009-06-25

Similar Documents

Publication Publication Date Title
DE112005001088T5 (de) Brennstoffzellensystem
DE112005000767T5 (de) Brennstoffzellensystem
DE10057804B4 (de) Verfahren zur Steuerung der Befeuchtung einer Brennstoffzelle sowie Steuerungssystem für eine Brennstoffzelle
DE102015118814A1 (de) Brennstoffzellensystem
DE102014207819A1 (de) Brennstoffzellensystem und Steuerverfahren eines Brennstoffzellensystems
DE102015119671B4 (de) Brennstoffzellensystem mit Abgabeventil
WO2023110609A1 (fr) Système de pile à combustible et procédé de fonctionnement d'un système de pile à combustible
DE102012207789A1 (de) Brennstoffzellensystem
DE102015117769B4 (de) Brennstoffzellensystem mit impedanzwertkorrektur und steuerverfahren für brennstoffzellensystem
EP1412999A2 (fr) Procede de regulation de la concentration en methanol dans des piles a combustible directes au methanol
DE10353848B4 (de) Diagnosevorrichtung und Diagnoseverfahren für eine Brennstoffzelle
DE102013223903A1 (de) Brennstoffzellensystem
DE102019113138A1 (de) Brennstoffzellensystem
EP3017493B1 (fr) Procédé de démarrage d'une pile à combustible
DE102018101630B4 (de) Brennstoffzellensystem
DE102015118800B4 (de) Verfahren zum Steuern von Brennstoffzellenfahrzeugen und Brennstoffzellenfahrzeuge
DE102013017542A1 (de) Brennstoffzellensystem mit einem Luftmassenstromsensor
DE102004034071A1 (de) Abschaltprozedur für Brennstoffzellensysteme
DE102007062165A1 (de) Verfahren und Vorrichtung zum Betrieb einer Brennstoffzelle
DE102020215995A1 (de) Brennstoffzellensystem mit aktiver Dosiereinheit und Betriebsverfahren zum Betrieb des Brennstoffzellensystems
DE112012000730T5 (de) Direktoxidations-Brennstoffzellen-System
WO2003096005A1 (fr) Dispositif et procede de mesure d'une concentration de gaz au moyen d'une pompe a ions oxygene a electrolyte solide
WO2024235728A1 (fr) Procédé de conditionnement et procédé de diagnostic pour système de pile à combustible
DE102017107012A1 (de) Verfahren zum Bestimmen eines Wasserstoffmangels und Vorrichtung zum Bestimmen eines Wasserstoffmangels
DE102004001424B4 (de) Brennstoffzellenanlage mit einer Kontrolleinheit

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: 08865862

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
122 Ep: pct application non-entry in european phase

Ref document number: 08865862

Country of ref document: EP

Kind code of ref document: A1