WO2008129840A1 - 高分子電解質型燃料電池および電極－膜－枠接合体の製造方法 - Google Patents

高分子電解質型燃料電池および電極－膜－枠接合体の製造方法 Download PDF

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Publication number
WO2008129840A1
WO2008129840A1 PCT/JP2008/000758 JP2008000758W WO2008129840A1 WO 2008129840 A1 WO2008129840 A1 WO 2008129840A1 JP 2008000758 W JP2008000758 W JP 2008000758W WO 2008129840 A1 WO2008129840 A1 WO 2008129840A1
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WO
WIPO (PCT)
Prior art keywords
channel
frame assembly
electrode
film
fuel cell
Prior art date
Application number
PCT/JP2008/000758
Other languages
English (en)
French (fr)
Inventor
Takashi Morimoto
Hiroki Kusakabe
Toshihiro Matsumoto
Norihiko Kawabata
Atsushi Murata
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to US12/306,986 priority Critical patent/US7771885B2/en
Priority to CN2008800004202A priority patent/CN101542799B/zh
Priority to EP08720637A priority patent/EP2058883B1/en
Priority to JP2008540398A priority patent/JP4235687B2/ja
Publication of WO2008129840A1 publication Critical patent/WO2008129840A1/ja
Priority to US12/469,977 priority patent/US7794892B2/en
Priority to US12/469,995 priority patent/US7790329B2/en

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    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14836—Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel 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
    • H01M8/02—Details
    • 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
    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0276—Sealing means characterised by their form
    • 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
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0286—Processes for forming seals
    • 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
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
    • 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
    • H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14942—Floating inserts, e.g. injecting simultaneously onto both sides of an insert through a pair of opposed gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric electrolytes
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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

Abstract

　ＭＥＡ－枠接合体を射出成型用金型に配置して、電極部の外縁と枠体の内縁の間において電極部の外縁沿いに延在して配置される第１の流路と、枠体の内外縁の間において内側弾性部材沿いに延在して配置される第２の流路と、第１の流路と上記第２の流路とを連通する複数の連通流路とを形成し、第１の流路に弾性体樹脂を注入することにより、第１の流路内に弾性体樹脂を充填するとともに、それぞれの連通流路を通して第２の流路に上記弾性体樹脂を充填し、ＭＥＡ－枠接合体とセパレータとの間を密着封止する弾性部材を一体的に形成する。
PCT/JP2008/000758 2007-03-30 2008-03-27 高分子電解質型燃料電池および電極－膜－枠接合体の製造方法 WO2008129840A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US12/306,986 US7771885B2 (en) 2007-03-30 2008-03-27 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly
CN2008800004202A CN101542799B (zh) 2007-03-30 2008-03-27 高分子电解质型燃料电池和电极-膜-框接合体的制造方法
EP08720637A EP2058883B1 (en) 2007-03-30 2008-03-27 Polymer electrolyte fuel cell and electrode/film/frame assembly manufacturing method
JP2008540398A JP4235687B2 (ja) 2007-03-30 2008-03-27 高分子電解質型燃料電池および電極−膜−枠接合体の製造方法
US12/469,977 US7794892B2 (en) 2007-03-30 2009-05-21 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly
US12/469,995 US7790329B2 (en) 2007-03-30 2009-05-21 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-091975 2007-03-30
JP2007091975 2007-03-30

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US12/306,986 A-371-Of-International US7771885B2 (en) 2007-03-30 2008-03-27 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly
US12/469,977 Continuation US7794892B2 (en) 2007-03-30 2009-05-21 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly
US12/469,995 Continuation US7790329B2 (en) 2007-03-30 2009-05-21 Polymer electrolyte fuel cell and manufacturing method for electrode-membrane-frame assembly

Publications (1)

Publication Number Publication Date
WO2008129840A1 true WO2008129840A1 (ja) 2008-10-30

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PCT/JP2008/000758 WO2008129840A1 (ja) 2007-03-30 2008-03-27 高分子電解質型燃料電池および電極－膜－枠接合体の製造方法

Country Status (6)

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US (3) US7771885B2 (ja)
EP (1) EP2058883B1 (ja)
JP (3) JP4235687B2 (ja)
KR (1) KR100918133B1 (ja)
CN (1) CN101542799B (ja)
WO (1) WO2008129840A1 (ja)

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JP2009230876A (ja) * 2008-03-19 2009-10-08 Nok Corp 燃料電池用シール構造およびその製造方法
US20110311898A1 (en) * 2010-01-05 2011-12-22 Masaki Yamauchi Electrode-membrane-frame assembly, method for producing the same, and fuel cell
WO2011158624A1 (ja) * 2010-06-14 2011-12-22 Nok株式会社 ガスケット
WO2013171939A1 (ja) * 2012-05-17 2013-11-21 パナソニック株式会社 燃料電池及びその製造方法
JP2016091726A (ja) * 2014-10-31 2016-05-23 パナソニック株式会社 セパレータ−シール部材接合体及びその製造方法
JP2019162806A (ja) * 2018-03-20 2019-09-26 株式会社豊田自動織機 金型
JP2021097001A (ja) * 2019-12-19 2021-06-24 住友理工株式会社 燃料電池用セパレータおよびその製造方法
WO2024106305A1 (ja) * 2022-11-15 2024-05-23 Nok株式会社 ガスケットおよびガスケット装置

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WO2007072671A1 (ja) * 2005-12-22 2007-06-28 Nissan Motor Co., Ltd. 燃料電池のシール構造
CN101542799B (zh) * 2007-03-30 2012-10-24 松下电器产业株式会社 高分子电解质型燃料电池和电极-膜-框接合体的制造方法
JP5412804B2 (ja) * 2008-11-19 2014-02-12 日産自動車株式会社 燃料電池スタック
JP5381078B2 (ja) 2008-12-19 2014-01-08 日産自動車株式会社 電極およびその製造方法
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WO2011114811A1 (ja) * 2010-03-17 2011-09-22 日産自動車株式会社 燃料電池セル
CA2801416C (en) * 2010-06-01 2015-03-10 Nissan Motor Co., Ltd. Fuel cell
CA2802412C (en) * 2010-06-15 2015-04-07 Nissan Motor Co., Ltd. Fuel cell with improved contact surface pressure
JP6046603B2 (ja) * 2013-12-26 2016-12-21 本田技研工業株式会社 樹脂枠付き膜電極構造体
JP6383203B2 (ja) * 2014-07-25 2018-08-29 Nok株式会社 プレート一体ガスケットの製造方法
DK3257097T3 (da) * 2015-02-12 2022-01-17 Ballard Power Systems Tætning til fast polymerelektrolytbrændselscelle
PL3093115T3 (pl) * 2015-05-13 2018-01-31 Stefan Pfaff Werkzeug Und Formenbau Gmbh Co Kg Urządzenie przyjmujące i sposób natryskiwania
US9931850B2 (en) * 2015-05-25 2018-04-03 Canon Kabushiki Kaisha Manufacture method of liquid supply member, manufacture apparatus, and liquid supply member
KR101806641B1 (ko) * 2015-12-16 2017-12-08 현대자동차주식회사 연료전지의 단위 셀 사출금형
KR20180070777A (ko) 2016-12-16 2018-06-27 현대자동차주식회사 연료전지 셀 프레임
DE102017117146A1 (de) * 2017-07-28 2019-01-31 Elringklinger Ag Elektrochemisch aktive Einheit für eine elektrochemische Vorrichtung
JP7323373B2 (ja) * 2019-08-07 2023-08-08 Nok株式会社 ガスケット
CN110667048A (zh) * 2019-12-05 2020-01-10 武汉中极氢能产业创新中心有限公司 一种燃料电池密封成型装置

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JP2001102072A (ja) 1999-09-30 2001-04-13 Aisin Seiki Co Ltd 燃料電池
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JP2003323900A (ja) * 2002-04-26 2003-11-14 Honda Motor Co Ltd 燃料電池用セパレータ
JP2004303723A (ja) * 2003-03-14 2004-10-28 Matsushita Electric Ind Co Ltd 高分子電解質型燃料電池
JP2004319461A (ja) * 2003-04-02 2004-11-11 Matsushita Electric Ind Co Ltd 燃料電池用電解質膜構造、燃料電池用電解質膜−電極接合体構造、及び燃料電池
JP2004311254A (ja) * 2003-04-08 2004-11-04 Matsushita Electric Ind Co Ltd 燃料電池のガスシール構造
JP2005100970A (ja) 2003-08-22 2005-04-14 Matsushita Electric Ind Co Ltd 高分子電解質型燃料電池
JP2005259465A (ja) 2004-03-10 2005-09-22 Matsushita Electric Ind Co Ltd 高分子電解質型燃料電池
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US20110311898A1 (en) * 2010-01-05 2011-12-22 Masaki Yamauchi Electrode-membrane-frame assembly, method for producing the same, and fuel cell
US10044047B2 (en) * 2010-01-05 2018-08-07 Panasonic Intellectual Property Management Co., Ltd. Electrode-membrane-frame assembly, method for producing the same, and fuel cell
US9269967B2 (en) 2010-06-14 2016-02-23 Nok Corporation Gasket
JP2012021640A (ja) * 2010-06-14 2012-02-02 Nok Corp ガスケット
WO2011158624A1 (ja) * 2010-06-14 2011-12-22 Nok株式会社 ガスケット
WO2013171939A1 (ja) * 2012-05-17 2013-11-21 パナソニック株式会社 燃料電池及びその製造方法
JPWO2013171939A1 (ja) * 2012-05-17 2016-01-07 パナソニックＩｐマネジメント株式会社 燃料電池及びその製造方法
JP2016091726A (ja) * 2014-10-31 2016-05-23 パナソニック株式会社 セパレータ−シール部材接合体及びその製造方法
JP2019162806A (ja) * 2018-03-20 2019-09-26 株式会社豊田自動織機 金型
JP7027996B2 (ja) 2018-03-20 2022-03-02 株式会社豊田自動織機 金型
JP2021097001A (ja) * 2019-12-19 2021-06-24 住友理工株式会社 燃料電池用セパレータおよびその製造方法
JP7373385B2 (ja) 2019-12-19 2023-11-02 住友理工株式会社 燃料電池用セパレータおよびその製造方法
WO2024106305A1 (ja) * 2022-11-15 2024-05-23 Nok株式会社 ガスケットおよびガスケット装置

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US7794892B2 (en) 2010-09-14
US20090226782A1 (en) 2009-09-10
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US20090202884A1 (en) 2009-08-13
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JP4235687B2 (ja) 2009-03-11
JP4305569B2 (ja) 2009-07-29
US7790329B2 (en) 2010-09-07
EP2058883A4 (en) 2009-09-09
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US7771885B2 (en) 2010-08-10
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