WO2008110258A1 - Mise à l'arrêt d'un système de cellules électrochimiques - Google Patents

Mise à l'arrêt d'un système de cellules électrochimiques Download PDF

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Publication number
WO2008110258A1
WO2008110258A1 PCT/EP2008/001497 EP2008001497W WO2008110258A1 WO 2008110258 A1 WO2008110258 A1 WO 2008110258A1 EP 2008001497 W EP2008001497 W EP 2008001497W WO 2008110258 A1 WO2008110258 A1 WO 2008110258A1
Authority
WO
WIPO (PCT)
Prior art keywords
cathode
area
fuel cell
anode
cell system
Prior art date
Application number
PCT/EP2008/001497
Other languages
English (en)
Inventor
Rolf-Peter Essling
Original Assignee
Daimler Ag
Ford Global Technologies Llc
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 Daimler Ag, Ford Global Technologies Llc filed Critical Daimler Ag
Publication of WO2008110258A1 publication Critical patent/WO2008110258A1/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
    • H01M8/04—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
    • H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the 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
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
    • 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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04228—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells during shut-down
    • 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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04231—Purging of the reactants
    • 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 shutting down a fuel cell system, and to a fuel cell system which is designed in an appropriate manner to carry out this method.
  • Patent Claim 1 a method is proposed having the features of Patent Claim 1, according to which not only is the cathode area closed by blocking the cathode input and the cathode output, but the volume enclosed in the cathode area is also thoroughly mixed.
  • a first closing valve 54 is integrated in the supply line 40 to the cathode area 24, and a further closing valve 56 is integrated in the output line 42 from the cathode area.
  • the cathode area can be closed off by closing these two valves 54, 56, so that the oxygen which is consumed by the fuel cell reaction is not replaced.
  • the oxygen which is located in the cathode area 24 reacts with the hydrogen from the anode area, which in the ideal leads to all of the oxygen which is located in the blocked cathode area 24 being consumed. This is particularly worthwhile after the fuel cell has been switched off, since oxygen remaining in the system reacts with the carbon in the carbon structure that holds the catalytic converter, which can lead to reduced functionality of the catalytic converter.
  • the creation of different oxygen concentrations within the cathode area is very largely avoided by the gas which is located in the closed-off cathode area being kept in circulation via the circulation line 58 and the fan 60, thus resulting in a permanent flow even when the cathode area 24 is in the closed-off state.
  • This flow can be maintained when the fuel cell is switched off until the oxygen partial pressure has fallen to a desired low value.
  • the circulation line is connected via the connection 57 to the line section between the closing valve 54 and the cathode input, and to the connection 57a in the line between the cathode output and the closing valve 56.
  • the energy which is released during the closing down stages of the reaction of the oxygen which is located in the closed-off cathode area 24 can in this case be used to drive the fan 60.

Landscapes

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

Abstract

La présente invention concerne un système de cellules électrochimiques (10) comportant une zone d'anode (22) et une zone de cathode (24). Dans ce système, la zone de cathode peut être arrêtée par des vannes de coupure (54, 56) afin d'empêcher une nouvelle arrivée d'oxygène de sorte que la réaction de l'oxygène qui se produit dans la zone de cathode peut s'arrêter. Afin de mélanger entièrement et activement le volume de gaz dans la zone de cathode (24), cette zone de cathode (24) comporte une ligne de circulation (58) qui, avec la zone de cathode (24) forme un circuit dans lequel le gaz, qui se situe dans la zone de cathode bloquée, est mis en circulation au moyen d'un ventilateur (60).
PCT/EP2008/001497 2007-03-12 2008-02-26 Mise à l'arrêt d'un système de cellules électrochimiques WO2008110258A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007011797 2007-03-12
DE102007011797.5 2007-03-12
DE102007031071A DE102007031071A1 (de) 2007-03-12 2007-07-04 Stillsetzen eines Brennstoffzellensystems
DE102007031071.6 2007-07-04

Publications (1)

Publication Number Publication Date
WO2008110258A1 true WO2008110258A1 (fr) 2008-09-18

Family

ID=39688354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/001497 WO2008110258A1 (fr) 2007-03-12 2008-02-26 Mise à l'arrêt d'un système de cellules électrochimiques

Country Status (2)

Country Link
DE (1) DE102007031071A1 (fr)
WO (1) WO2008110258A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016056618A1 (fr) * 2014-10-09 2016-04-14 トヨタ自動車株式会社 Système de pile à combustible
JP2016081918A (ja) * 2014-10-09 2016-05-16 トヨタ自動車株式会社 燃料電池システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020182456A1 (en) * 2001-06-01 2002-12-05 Condit David A. Shut-down procedure for hydrogen-air fuel cell system
JP2004022487A (ja) * 2002-06-20 2004-01-22 Nissan Motor Co Ltd 燃料電池システム
US20050031917A1 (en) * 2003-08-06 2005-02-10 Margiott Paul R. Hydrogen passivation shut down system for a fuel cell power plant
WO2008027043A1 (fr) * 2006-08-31 2008-03-06 Utc Power Corporation Éviter qu'un liquide de refroidissement ne s'effondre dans des champs de réactifs pendant l'arrêt d'une pile à combustible pem

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953614A1 (de) 1999-11-08 2001-05-17 Siemens Ag Brennstoffzellenanlage
US7479336B2 (en) 2003-07-02 2009-01-20 General Motors Corporation Gas control and operation method of a fuel cell system for water and gas distribution

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020182456A1 (en) * 2001-06-01 2002-12-05 Condit David A. Shut-down procedure for hydrogen-air fuel cell system
JP2004022487A (ja) * 2002-06-20 2004-01-22 Nissan Motor Co Ltd 燃料電池システム
US20050031917A1 (en) * 2003-08-06 2005-02-10 Margiott Paul R. Hydrogen passivation shut down system for a fuel cell power plant
WO2008027043A1 (fr) * 2006-08-31 2008-03-06 Utc Power Corporation Éviter qu'un liquide de refroidissement ne s'effondre dans des champs de réactifs pendant l'arrêt d'une pile à combustible pem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016056618A1 (fr) * 2014-10-09 2016-04-14 トヨタ自動車株式会社 Système de pile à combustible
JP2016081918A (ja) * 2014-10-09 2016-05-16 トヨタ自動車株式会社 燃料電池システム

Also Published As

Publication number Publication date
DE102007031071A1 (de) 2008-09-18

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