DE19805683A1 - Connector element especially a bipolar plate in a fuel cell for mobile applications, e.g. automobiles - Google Patents
Connector element especially a bipolar plate in a fuel cell for mobile applications, e.g. automobilesInfo
- Publication number
- DE19805683A1 DE19805683A1 DE19805683A DE19805683A DE19805683A1 DE 19805683 A1 DE19805683 A1 DE 19805683A1 DE 19805683 A DE19805683 A DE 19805683A DE 19805683 A DE19805683 A DE 19805683A DE 19805683 A1 DE19805683 A1 DE 19805683A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel cell
- connector element
- connecting element
- automobiles
- bipolar plate
- 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- Withdrawn
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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
-
- 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
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
-
- 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
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
Description
Die Erfindung betrifft ein verbindendes Element für Brennstoffzellen.The invention relates to a connecting element for Fuel cells.
Eine Brennstoffzelle weist eine Kathode, einen Elektro lyten sowie eine Anode auf. Der Kathode wird ein Oxida tionsmittel, z. B. Luft und der Anode wird ein Brenn stoff, z. B. Wasserstoff zugeführt.A fuel cell has a cathode, an electric lyte and an anode. The cathode becomes an oxide tion means, e.g. B. air and the anode becomes a focal fabric, e.g. B. supplied hydrogen.
Verschiedene Brennstoffzellentypen sind bekannt, so beispielsweise die SOFC-Brennstoffzelle aus der Druck schrift DE 44 30 958 C1 oder die PEM-Brennstoffzelle aus der Druckschrift DE 195 31 852 C1.Different types of fuel cells are known for example the SOFC fuel cell from the print DE 44 30 958 C1 or the PEM fuel cell from the publication DE 195 31 852 C1.
Die Betriebstemperatur einer PEM-Brennstoffzelle liegt bei ca. 80°C. An der Anode einer PEM-Brennstoffzelle bilden sich in Anwesenheit des Brennstoffs mittels ei nes Katalysators Protonen. Die Protonen passieren den Elektrolyten und verbinden sich auf der Kathodenseite mit dem vom Oxidationsmittel stammenden Sauerstoff zu Wasser. Elektronen werden dabei freigesetzt und elek trische Energie erzeugt.The operating temperature of a PEM fuel cell is at approx. 80 ° C. At the anode of a PEM fuel cell are formed in the presence of the fuel by means of egg Proton catalyst. The protons pass that Electrolytes and connect on the cathode side with the oxygen coming from the oxidizing agent Water. Electrons are released and elec generates tric energy.
Mehrere Brennstoffzellen werden in der Regel zur Erzie lung großer Leistungen durch verbindende Elemente zu einem sogenannten Brennstoffzellenstapel mechanisch und elektrisch miteinander verbunden. Ein Beispiel für ein solches verbindendes Element stellt die aus DE 44 10 711 C1 bekannte bipolare Platte dar. Several fuel cells are usually used to educate great achievements through connecting elements a so-called fuel cell stack mechanically and electrically connected to each other. An example of a such a connecting element is that from DE 44 10 711 C1 known bipolar plate.
Es ist bekannt, verbindende Elemente für PEM-Brenn stoffzellen aus Graphit durch mechanische Bearbeitung des Materials herzustellen. Alternativ kann gemäß der Druckschrift "M. S. Wilson, T. E. Springer, T. A. Zawodzinski, J. R. Davey, C. R. Derouin, S. Gottesfeld, Development of Components for a Polymer Electrolyte Fuell Cell of Low Cost and High Performance, 1994 Fuel Cell Seminar, 28 Nov.-1 Dec. 1994, p. 281 ff" ein derartiges verbindendes Element aus einem korrosionsbe ständigen Edelstahl wie AISI 316L bestehen. Der Edel stahl ist dann mit einem Edelmetall wie Gold oder Pla tin beschichtet.It is known to have connecting elements for PEM firing Graphite fabric cells by mechanical processing of the material. Alternatively, according to the Publication "M. S. Wilson, T. E. Springer, T. A. Zawodzinski, J.R. Davey, C.R. Derouin, S. Gottesfeld, Development of Components for a Polymer Electrolyte Fuell Cell of Low Cost and High Performance, 1994 Fuel Cell Seminar, Nov. 28-Dec. 1 1994, p. 281 ff " such connecting element from a corrosion permanent stainless steel such as AISI 316L. The noble steel is then made with a precious metal such as gold or pla tin coated.
Die Edelmetallbeschichtung auf dem Edelstahl ist erfor derlich, da sich andernfalls elektronisch nichtleitende Oxidschichten auf der Oberfläche bilden können und dann der gewünschte elektrische Kontakt zwischen zwei Brenn stoffzellen unterbrochen wäre.The precious metal coating on the stainless steel is required This is because otherwise electronically non-conductive And then oxide layers can form on the surface the desired electrical contact between two burners would be interrupted.
Nachteilhaft ist eine solche Edelmetallbeschichtung aufgrund des hohen Materialpreises sehr teuer.Such a noble metal coating is disadvantageous very expensive due to the high material price.
Aufgabe der Erfindung ist die Schaffung eines preiswer ten verbindenden Elementes für eine Brennstoffzelle, dessen gute elektrische Leitfähigkeit dauerhaft sicher gestellt ist.The object of the invention is to create an inexpensive th connecting element for a fuel cell, its good electrical conductivity is permanently safe is posed.
Die Aufgabe wird durch ein verbindendes Element mit den Merkmalen des Anspruchs gelöst. Vorteilhafte Ausgestal tungen ergeben sich aus den Unteransprüchen. Eine be vorzugte Verwendungsweise weist die Merkmale des Ver wendungsanspruchs auf.The task is linked to the Features of the claim solved. Advantageous design cations result from the subclaims. A be preferred use shows the characteristics of Ver right to use.
Das anspruchsgemäße verbindende Element besteht im Kern aus einem Metall. Besonders gut geeignete Metalle sind korrosionsbeständig wie zum Beispiel Edelstähle wie V2A oder V4A. Der Metallkern ist mit einer elektrisch leit fähigen, nichtmetallischen Schicht beschichtet. Das elektrisch leitfähige, nichtmetallische Material ist so auszuwählen, daß es korrosionsbeständig unter Betriebs bedingungen ist.The core element of the demanding connecting element from a metal. Metals are particularly suitable corrosion resistant such as stainless steel such as V2A or V4A. The metal core is electrically conductive capable, non-metallic layer coated. The electrically conductive, non-metallic material is like this select that it is corrosion resistant under operation is conditions.
Die Beschichtung kann durch die bekannten Beschich tungsverfahren wie zum Beispiel durch plasmagestützte PVD- oder CVD-Verfahren, durch thermische Zersetzung organischer Verbindungen oder durch lasergestützte Ver fahren erfolgen.The coating can be done by the known coating processing methods such as plasma-assisted PVD or CVD process, by thermal decomposition organic compounds or by laser-assisted ver drive done.
Das anspruchsgemäße verbindende Element besteht aus preiswerten Materialien. Es ist leicht, flexibel und weist eine dauerhaft hohe elektrische Leitfähigkeit auf. Es kann mit einfachen Verarbeitungstechniken her gestellt werden.The demanding connecting element consists of inexpensive materials. It is light, flexible and exhibits permanently high electrical conductivity on. It can be made using simple processing techniques be put.
Aufgrund des geringen Gewichtes ist die anspruchsgemäße bipolare Platte besonders für einen Einsatz in mobilen Vorrichtungen, wie zum Beispiel in einem Auto geeignet.Due to the low weight is the most demanding bipolar plate especially for use in mobile Devices such as suitable in a car.
Geeignete nichtmetallische Materialien sind insbeson dere Kohlenstoff oder elektrisch leitfähige Keramiken. Beispiele für geeignete, elektrisch leitfähige Keramiken sind Boride wie TiB2, CrB2, ZrB2, Carbide wie TiC, ZrC oder Nitride wie TiN, ZrN. Mit Stickstoff dotiertes SiC stellt ein weiteres Beispiel für eine geeignete, elektrisch leitfähige Keramik dar. Kombinationen der nichtmetallischen Materialien, so zum Beispiel in Form von mehreren Schichten, sind möglich. Kohlenstoff und Keramiken sind besonders korrosionsbe ständig und daher vorteilhaft.Suitable non-metallic materials are in particular carbon or electrically conductive ceramics. Examples of suitable, electrically conductive ceramics are borides such as TiB 2 , CrB 2 , ZrB 2 , carbides such as TiC, ZrC or nitrides such as TiN, ZrN. SiC doped with nitrogen represents another example of a suitable, electrically conductive ceramic. Combinations of the non-metallic materials, for example in the form of several layers, are possible. Carbon and ceramics are particularly corrosion resistant and therefore advantageous.
Einen Metallkern vorzusehen, führt zu einer hohen Festigkeit und einer großen mechanischen Stabilität im Vergleich zu verbindenden Elementen, die vollständig aus Kohlenstoff bestehen. Es sind infolgedessen ver gleichsweise geringe Dicken, geringe Massen und folg lich niedrige Herstellungskosten möglich.Providing a metal core leads to a high one Strength and great mechanical stability in the Compared to connecting elements that are complete consist of carbon. As a result, equally small thicknesses, small masses and follow low manufacturing costs possible.
Grundsätzlich genügt eine teilweise Beschichtung des Metallkerns, da lediglich die Bildung einer Oxidschicht an den Kontaktstellen vermieden werden soll. Bei einer teilweisen Beschichtung ist darauf zu achten, daß die Kontaktstellen zu angrenzenden Elektroden beschichtet sind.Basically, a partial coating of the Metal core, since only the formation of an oxide layer should be avoided at the contact points. At a partial coating must be ensured that the Contact points to adjacent electrodes coated are.
Claims (4)
- - das verbindende Element weist einen aus Metall be stehenden Kern auf,
- - der metallische Kern weist zumindest eine elektrisch leitfähige, nichtmetallische Schicht an seiner Oberfläche auf.
- - The connecting element has a core made of metal,
- - The metallic core has at least one electrically conductive, non-metallic layer on its surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19805683A DE19805683A1 (en) | 1998-02-12 | 1998-02-12 | Connector element especially a bipolar plate in a fuel cell for mobile applications, e.g. automobiles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19805683A DE19805683A1 (en) | 1998-02-12 | 1998-02-12 | Connector element especially a bipolar plate in a fuel cell for mobile applications, e.g. automobiles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19805683A1 true DE19805683A1 (en) | 1999-08-19 |
Family
ID=7857472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19805683A Withdrawn DE19805683A1 (en) | 1998-02-12 | 1998-02-12 | Connector element especially a bipolar plate in a fuel cell for mobile applications, e.g. automobiles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19805683A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001022513A1 (en) | 1999-09-17 | 2001-03-29 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
DE19947858A1 (en) * | 1999-10-05 | 2001-04-26 | Dornier Gmbh | PEM fuel cell has alternating membrane electrode units and metallic bipolar plates with porous gas-permeable intermediate layer located between one electrode and bipolar plate and/or end plate |
DE10058337A1 (en) * | 2000-11-24 | 2002-05-29 | Gen Motors Corp | Sheet product used as a bipolar plate in a fuel cell or in an electrolyzer has a conductive corrosion resistant protective coating made from a metal oxide on one side. |
DE19937255B4 (en) * | 1999-08-06 | 2004-05-06 | Ballard Power Systems Inc., Burnaby | Corrosion resistant bipolar plate for PEM fuel cells and use |
WO2004105164A2 (en) * | 2003-05-22 | 2004-12-02 | Reinz-Dichtungs-Gmbh | A high-temperature fuel cell system |
US6989213B2 (en) | 2000-04-06 | 2006-01-24 | Ballard Power Systems Inc. | Metal bipolar plate |
WO2007061522A2 (en) | 2005-11-21 | 2007-05-31 | Relion, Inc. | Proton exchange membrane fuel cell and method of forming a fuel cell |
DE102006024050B4 (en) * | 2006-05-23 | 2009-08-20 | Daimler Ag | Device for applying a coating to a surface of a workpiece |
US8597846B2 (en) | 2007-05-08 | 2013-12-03 | Relion, Inc. | Proton exchange membrane fuel cell stack and fuel cell stack module |
US9293778B2 (en) | 2007-06-11 | 2016-03-22 | Emergent Power Inc. | Proton exchange membrane fuel cell |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19504172A1 (en) * | 1995-02-07 | 1996-08-08 | Siemens Ag | Protecting chromium@-based alloy body |
EP0780916A1 (en) * | 1995-12-22 | 1997-06-25 | General Motors Corporation | Corrosion resistant electrical contact elements for fuel cells with polymer electrolyte membrane |
DE19609813C1 (en) * | 1996-03-13 | 1997-07-10 | Forschungszentrum Juelich Gmbh | Long life high temperature fuel cell interconnector |
DE19627504C1 (en) * | 1996-07-08 | 1997-10-23 | Siemens Ag | Connection lead plate for high temperature fuel cell stack |
DE19610318C1 (en) * | 1996-03-15 | 1997-11-20 | Siemens Ag | Chromium@ alloy substrate stabilised by siliciding |
-
1998
- 1998-02-12 DE DE19805683A patent/DE19805683A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19504172A1 (en) * | 1995-02-07 | 1996-08-08 | Siemens Ag | Protecting chromium@-based alloy body |
EP0780916A1 (en) * | 1995-12-22 | 1997-06-25 | General Motors Corporation | Corrosion resistant electrical contact elements for fuel cells with polymer electrolyte membrane |
DE19609813C1 (en) * | 1996-03-13 | 1997-07-10 | Forschungszentrum Juelich Gmbh | Long life high temperature fuel cell interconnector |
DE19610318C1 (en) * | 1996-03-15 | 1997-11-20 | Siemens Ag | Chromium@ alloy substrate stabilised by siliciding |
DE19627504C1 (en) * | 1996-07-08 | 1997-10-23 | Siemens Ag | Connection lead plate for high temperature fuel cell stack |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19937255B4 (en) * | 1999-08-06 | 2004-05-06 | Ballard Power Systems Inc., Burnaby | Corrosion resistant bipolar plate for PEM fuel cells and use |
WO2001022513A1 (en) | 1999-09-17 | 2001-03-29 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
EP1235288A4 (en) * | 1999-09-17 | 2006-12-06 | Matsushita Electric Ind Co Ltd | Polymer electrolyte fuel cell |
EP1235288A1 (en) * | 1999-09-17 | 2002-08-28 | Matsushita Electric Industrial Co., Ltd. | Polymer electrolyte fuel cell |
DE19947858A1 (en) * | 1999-10-05 | 2001-04-26 | Dornier Gmbh | PEM fuel cell has alternating membrane electrode units and metallic bipolar plates with porous gas-permeable intermediate layer located between one electrode and bipolar plate and/or end plate |
DE19947858C2 (en) * | 1999-10-05 | 2003-04-10 | Daimler Chrysler Ag | Corrosion-resistant fuel cell |
US6989213B2 (en) | 2000-04-06 | 2006-01-24 | Ballard Power Systems Inc. | Metal bipolar plate |
DE10058337A1 (en) * | 2000-11-24 | 2002-05-29 | Gen Motors Corp | Sheet product used as a bipolar plate in a fuel cell or in an electrolyzer has a conductive corrosion resistant protective coating made from a metal oxide on one side. |
WO2004105164A3 (en) * | 2003-05-22 | 2005-06-16 | Reinz Dichtungs Gmbh | A high-temperature fuel cell system |
WO2004105164A2 (en) * | 2003-05-22 | 2004-12-02 | Reinz-Dichtungs-Gmbh | A high-temperature fuel cell system |
WO2007061522A2 (en) | 2005-11-21 | 2007-05-31 | Relion, Inc. | Proton exchange membrane fuel cell and method of forming a fuel cell |
EP1952464A2 (en) * | 2005-11-21 | 2008-08-06 | Relion, Inc. | Proton exchange membrane fuel cell and method of forming a fuel cell |
EP1952464A4 (en) * | 2005-11-21 | 2013-01-16 | Relion Inc | Proton exchange membrane fuel cell and method of forming a fuel cell |
DE102006024050B4 (en) * | 2006-05-23 | 2009-08-20 | Daimler Ag | Device for applying a coating to a surface of a workpiece |
US8597846B2 (en) | 2007-05-08 | 2013-12-03 | Relion, Inc. | Proton exchange membrane fuel cell stack and fuel cell stack module |
US9293778B2 (en) | 2007-06-11 | 2016-03-22 | Emergent Power Inc. | Proton exchange membrane fuel cell |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |