ES2192105T3 - Placa bipolar para pila de combustible y pila de combustible que comprende estas placas. - Google Patents

Placa bipolar para pila de combustible y pila de combustible que comprende estas placas.

Info

Publication number
ES2192105T3
ES2192105T3 ES99972375T ES99972375T ES2192105T3 ES 2192105 T3 ES2192105 T3 ES 2192105T3 ES 99972375 T ES99972375 T ES 99972375T ES 99972375 T ES99972375 T ES 99972375T ES 2192105 T3 ES2192105 T3 ES 2192105T3
Authority
ES
Spain
Prior art keywords
fuel battery
bipolar plate
plates
understanding
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.)
Expired - Lifetime
Application number
ES99972375T
Other languages
English (en)
Inventor
Marielle Marchand
Olivier Lebaigue
Michel Amblard
Bruno Bador
Fabien Heurtaux
Jean-Pierre Lisse
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Commissariat a lEnergie Atomique CEA
Renault SAS
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 Automobiles Peugeot SA, Automobiles Citroen SA, Commissariat a lEnergie Atomique CEA, Renault SAS filed Critical Automobiles Peugeot SA
Application granted granted Critical
Publication of ES2192105T3 publication Critical patent/ES2192105T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/04Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04119Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204Non-porous and characterised by the material
    • H01M8/0223Composites
    • H01M8/0228Composites in the form of layered or coated products
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023Porous and characterised by the material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H01M8/0254Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/026Collectors; 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0265Collectors; 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00Electrolytes
    • H01M2300/0017Non-aqueous electrolytes
    • H01M2300/0065Solid electrolytes
    • H01M2300/0082Organic polymers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49108Electric battery cell making
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49117Conductor or circuit manufacturing
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/5313Means to assemble electrical device
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/5313Means to assemble electrical device
    • Y10T29/53135Storage cell or battery

Landscapes

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

Abstract

Placa bipolar para pila de combustible, que comprende, sobre al menos una de sus caras, al menos una acanaladura susceptible de formar con la superficie de un electrodo adyacente, al menos un canal de distribución de gas, en la que la sección transversal de dicho canal de distribución tiene sensiblemente la forma de un cuadrilátero convexo que comprende un primer lado constituido por la citada superficie de electrodo, un segundo lado opuesto a dicho primer lado, y otros dos lados, siendo los ángulos comprendidos entre el citado primer lado y cada uno de los otros dos lados citados más abiertos que los ángulos comprendidos entre el citado lado opuesto y cada uno de dichos otros dos lados.
ES99972375T 1998-11-12 1999-11-10 Placa bipolar para pila de combustible y pila de combustible que comprende estas placas. Expired - Lifetime ES2192105T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9814199A FR2786027B1 (fr) 1998-11-12 1998-11-12 Plaques bipolaires pour pile a combustible et pile a combustible comprenant ces plaques

Publications (1)

Publication Number Publication Date
ES2192105T3 true ES2192105T3 (es) 2003-09-16

Family

ID=9532630

Family Applications (1)

Application Number Title Priority Date Filing Date
ES99972375T Expired - Lifetime ES2192105T3 (es) 1998-11-12 1999-11-10 Placa bipolar para pila de combustible y pila de combustible que comprende estas placas.

Country Status (10)

Country Link
US (1) US6649297B1 (es)
EP (1) EP1131854B1 (es)
JP (1) JP4920133B2 (es)
AT (1) ATE232649T1 (es)
AU (1) AU1166400A (es)
CA (1) CA2349934C (es)
DE (1) DE69905389T2 (es)
ES (1) ES2192105T3 (es)
FR (1) FR2786027B1 (es)
WO (1) WO2000030199A1 (es)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10143659B4 (de) * 2001-09-06 2007-10-18 Psfu Profilschleif-, Fertigungs- Und Umwelttechnik Gmbh Bipolarplatte für einen Brennstoffzellenstapel mit Luft- oder Sauerstoffversorgung
DE10158848B4 (de) * 2001-10-15 2004-02-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Elektrochemische Elektrode, Elektroden-Membran-Einheit und Verfahren zur Herstellung einer elektrochemischen Elektrode sowie deren Verwendung
US6998188B2 (en) * 2002-02-19 2006-02-14 Petillo Phillip J Fuel cell components
DE10216306B4 (de) * 2002-04-14 2008-06-12 Sgl Carbon Ag Verfahren zur Herstellung einer Kontaktplatte für eine elektrochemische Zelle sowie deren Verwendungen
DE10217712A1 (de) * 2002-04-20 2003-11-13 Daimler Chrysler Ag Elektrodenplatte mit Befeuchtungsbereich
JP3882735B2 (ja) * 2002-10-18 2007-02-21 株式会社日立製作所 燃料電池
JP3956864B2 (ja) * 2003-02-13 2007-08-08 トヨタ自動車株式会社 流路構造を有する燃料電池のセパレータ
FR2854499B1 (fr) * 2003-04-30 2006-12-01 Renault Sa Plaque bipolaire pour pile a combustible et pile a combustible equipee d'une telle plaque
JP4661093B2 (ja) * 2003-12-02 2011-03-30 株式会社デンソー 燃料電池
AU2003304611A1 (en) * 2003-12-12 2005-06-29 Lg Electronics Inc. Bipolar plate of fuel cell and fabrication method thereof
US20050164070A1 (en) * 2004-01-27 2005-07-28 Krajewski Paul E. Extruded bipolar plates
US7087337B2 (en) * 2004-02-05 2006-08-08 General Motors Corporation Flow field geometries for improved water management
US20050242471A1 (en) * 2004-04-30 2005-11-03 Bhatt Sanjiv M Methods for continuously producing shaped articles
JP4086894B2 (ja) 2005-05-13 2008-05-14 松下電器産業株式会社 燃料電池
JP4889983B2 (ja) * 2005-09-02 2012-03-07 本田技研工業株式会社 燃料電池
KR100806102B1 (ko) * 2006-06-02 2008-02-21 엘지전자 주식회사 연료전지의 바이폴라 플레이트
MX2009012655A (es) * 2007-05-23 2009-12-14 Entegris Inc Articulos que presentan superficies estructuradas humectables.
US8277986B2 (en) * 2007-07-02 2012-10-02 GM Global Technology Operations LLC Bipolar plate with microgrooves for improved water transport
US8168340B2 (en) * 2007-11-07 2012-05-01 GM Global Technology Operations LLC Water removal features for PEMfc stack manifolds
EP2545608B1 (en) 2010-03-08 2016-11-02 BDF IP Holdings Ltd Flow field plate for electrochemical fuel cells
FR2976591B1 (fr) * 2011-06-16 2013-07-12 Commissariat Energie Atomique Module interconnecteur de realisation simplifiee pour dispositif d'electrolyse de l'eau a haute temperature
JP6029299B2 (ja) * 2012-03-15 2016-11-24 日産自動車株式会社 燃料電池
DE102012211318A1 (de) 2012-06-29 2014-01-02 Siemens Aktiengesellschaft Elektrischer Energiespeicher
JP6036825B2 (ja) 2012-07-17 2016-12-07 トヨタ車体株式会社 燃料電池
US10122025B2 (en) 2012-08-24 2018-11-06 Ford Global Technologies, Llc Proton exchange membrane fuel cell with stepped channel bipolar plate
US9786928B2 (en) 2012-08-24 2017-10-10 Ford Global Technologies, Llc Proton exchange membrane fuel cell with stepped channel bipolar plate
JP6201876B2 (ja) * 2014-04-23 2017-09-27 住友電気工業株式会社 双極板、レドックスフロー電池、及び双極板の製造方法
BR112018011986B1 (pt) 2015-12-15 2021-07-13 Nissan Motor Co., Ltd. Pilha de célula de combustível
KR102071906B1 (ko) * 2016-12-02 2020-01-31 주식회사 엘지화학 분리판, 및 이를 포함하는 연료전지 스택
CN110970632B (zh) * 2018-09-29 2023-07-28 中国科学院大连化学物理研究所 一种适用于梯形液流电池的双极板及应用
CN110323466A (zh) * 2019-07-09 2019-10-11 武汉船用电力推进装置研究所(中国船舶重工集团公司第七一二研究所) 一种新型燃料电池石墨双极板结构
US11742496B2 (en) 2019-07-19 2023-08-29 Ford Global Technologies, Llc Bipolar plate for fuel cell
JP2022143987A (ja) * 2021-03-18 2022-10-03 株式会社東芝 二酸化炭素電解装置および二酸化炭素電解装置の運転方法

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL257579A (es) * 1959-11-03 1900-01-01
US4175165A (en) * 1977-07-20 1979-11-20 Engelhard Minerals & Chemicals Corporation Fuel cell system utilizing ion exchange membranes and bipolar plates
US4182795A (en) * 1978-07-10 1980-01-08 Energy Research Corporation Fuel cell thermal control and reforming of process gas hydrocarbons
US4292379A (en) * 1980-04-28 1981-09-29 Westinghouse Electric Corp. Variable area fuel cell process channels
JPH0652656B2 (ja) * 1987-09-30 1994-07-06 株式会社日立製作所 溶融炭酸塩型燃料電池
US4788110A (en) * 1987-10-20 1988-11-29 Energy Research Corporation Fuel cell with partially shielded internal reformer
JPH02168565A (ja) * 1988-12-21 1990-06-28 Nippon Soken Inc 燃料電池
JPH03289057A (ja) * 1990-04-06 1991-12-19 Hitachi Ltd 燃料電池セパレータ
JPH05251097A (ja) * 1992-03-03 1993-09-28 Fuji Electric Co Ltd 固体高分子電解質型燃料電池
JPH0689730A (ja) * 1992-09-10 1994-03-29 Fuji Electric Co Ltd 固体高分子電解質型燃料電池
JP3375166B2 (ja) * 1993-02-10 2003-02-10 政廣 渡辺 燃料電池及びその冷却・除湿方法
JP3553101B2 (ja) * 1993-03-15 2004-08-11 三菱重工業株式会社 固体高分子電解質燃料電池
JPH07220743A (ja) * 1994-01-27 1995-08-18 Kansai Electric Power Co Inc:The 燃料電池、そのバイポーラ板、およびバイポーラ板の製造方法
JP3249282B2 (ja) * 1994-02-07 2002-01-21 三菱重工業株式会社 固体高分子電解質燃料電池
JP3459300B2 (ja) * 1994-08-02 2003-10-20 マツダ株式会社 固体高分子型燃料電池
JPH0896820A (ja) * 1994-09-28 1996-04-12 Toyota Motor Corp 燃料電池
JPH08102327A (ja) * 1994-09-29 1996-04-16 Nippon Telegr & Teleph Corp <Ntt> 中空平板状燃料電池基板
JPH08138692A (ja) * 1994-11-04 1996-05-31 Toyota Motor Corp 燃料電池
JPH09180741A (ja) * 1995-12-22 1997-07-11 Fuji Electric Co Ltd 固体高分子電解質型燃料電池
CN1160819C (zh) * 1997-04-10 2004-08-04 磁电机技术有限公司 高分子电解质-燃料电池膜片湿度的调节方法与高分子电解质-燃料电池
US6329094B1 (en) * 1997-05-14 2001-12-11 Sanyo Electric Co., Ltd. Polymer electrolyte fuel cell showing stable and outstanding electric-power generating characteristics
US6127055A (en) * 1997-11-19 2000-10-03 Simmons, Jr.; Timothy C. Multi-source electrical drive system
US6372376B1 (en) * 1999-12-07 2002-04-16 General Motors Corporation Corrosion resistant PEM fuel cell
US6511766B1 (en) * 2000-06-08 2003-01-28 Materials And Electrochemical Research (Mer) Corporation Low cost molded plastic fuel cell separator plate with conductive elements
US6517963B2 (en) * 2000-12-13 2003-02-11 Plug Power Inc. Carbon monoxide filter
US6544681B2 (en) * 2000-12-26 2003-04-08 Ballard Power Systems, Inc. Corrugated flow field plate assembly for a fuel cell

Also Published As

Publication number Publication date
ATE232649T1 (de) 2003-02-15
JP4920133B2 (ja) 2012-04-18
FR2786027B1 (fr) 2006-04-28
US6649297B1 (en) 2003-11-18
CA2349934C (fr) 2009-06-02
DE69905389T2 (de) 2003-12-11
AU1166400A (en) 2000-06-05
DE69905389D1 (de) 2003-03-20
JP2002530816A (ja) 2002-09-17
CA2349934A1 (fr) 2000-05-25
FR2786027A1 (fr) 2000-05-19
EP1131854A1 (fr) 2001-09-12
EP1131854B1 (fr) 2003-02-12
WO2000030199A1 (fr) 2000-05-25

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