DE102010007705A1 - Method for manufacturing bipolar plate for fuel cell, involves thermally interconnecting base plates using bonding agent, and applying bonding agent on surface sides of base plate or intermediate plate via recesses formed in mask - Google Patents
Method for manufacturing bipolar plate for fuel cell, involves thermally interconnecting base plates using bonding agent, and applying bonding agent on surface sides of base plate or intermediate plate via recesses formed in mask Download PDFInfo
- Publication number
- DE102010007705A1 DE102010007705A1 DE102010007705A DE102010007705A DE102010007705A1 DE 102010007705 A1 DE102010007705 A1 DE 102010007705A1 DE 102010007705 A DE102010007705 A DE 102010007705A DE 102010007705 A DE102010007705 A DE 102010007705A DE 102010007705 A1 DE102010007705 A1 DE 102010007705A1
- Authority
- DE
- Germany
- Prior art keywords
- mask
- base plates
- joining agent
- bonding agent
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000446 fuel Substances 0.000 title claims description 10
- 239000007767 bonding agent Substances 0.000 title abstract 4
- 238000005476 soldering Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims abstract description 3
- 238000005219 brazing Methods 0.000 claims abstract 6
- 238000007751 thermal spraying Methods 0.000 claims abstract 2
- 238000005304 joining Methods 0.000 claims description 60
- 239000003795 chemical substances by application Substances 0.000 claims description 53
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012495 reaction gas Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
-
- 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
-
- 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
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
-
- 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
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)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer Bipolarplatte für eine Brennstoffzelle nach den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a method for producing a bipolar plate for a fuel cell according to the features of the preamble of
Aus dem Stand der Technik ist, wie in der
Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren zum Herstellen einer Bipolarplatte für eine Brennstoffzelle anzugeben.The invention has for its object to provide an improved method for producing a bipolar plate for a fuel cell.
Die Aufgabe wird erfindungsgemäß durch ein Verfahren zum Herstellen einer Bipolarplatte für eine Brennstoffzelle mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a method for producing a bipolar plate for a fuel cell having the features of
Bevorzugte Ausgestaltungen und Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.Preferred embodiments and further developments of the invention are specified in the dependent claims.
In einem Verfahren zum Herstellen einer Bipolarplatte für eine Brennstoffzelle werden zwei Grundplatten unter Verwendung eines Fügemittels thermisch miteinander verbunden, wobei dieses Fügemittel einen niedrigeren Schmelzpunkt als das Material der Grundplatten aufweist.In a method for manufacturing a bipolar plate for a fuel cell, two base plates are thermally bonded together using a joining agent, this joining agent having a lower melting point than the material of the base plates.
Erfindungsgemäß wird das Fügemittel über Ausnehmungen in einer Maske auf zumindest eine Flächenseite zumindest einer der Grundplatten aufgebracht. Eine Alternative Ausgestaltungsform ist dabei, zwischen den Grundplatten eine Zwischenplatte, mit einer den Grundplatten entsprechenden Geometrie, anzuordnen, wobei das Fügemittel in diesem Fall auf beiden Flächenseiten der Zwischenplatte aufgebracht wird. Die Applikation des Fügemittels erfolgt dabei analog zur Applikation auf einer Grundplatte. Im weiteren ist somit unter der Applikation eines Fügemittels auf eine Grundplatte in analoger Weise auch die alternative Ausgestaltung der Applikation eines Fügemittels auf eine Zwischenplatte, welche zwischen den Grundplatten angeordnet wird, zu verstehen.According to the invention the joining means is applied via recesses in a mask on at least one surface side of at least one of the base plates. An alternative embodiment is to arrange between the base plates an intermediate plate, with a geometry corresponding to the base plates, wherein the joining means is applied in this case on both surface sides of the intermediate plate. The application of the joining agent is carried out analogously to the application on a base plate. Furthermore, the application of a joining agent to a baseplate in an analogous manner thus also means the alternative embodiment of the application of a joining agent to an intermediate plate which is arranged between the baseplates.
Die Maske und deren Ausnehmungen ermöglichen eine optimale Positionierung des Fügemittels auf der Grundplatte und das Aufbringen des Fügemittels mit einer optimalen Schichtdicke. Durch eine derartige strukturgenaue Applikation des Fügemittels wird die thermische Verbindung der beiden Grundplatten, d. h. das Verlöten der beiden Grundplatten, optimiert und beispielsweise fehlerhafte Lötstellen, eine unzureichende und/oder undichte Verbindung der beiden Grundplatten oder ein Verstopfen von Kühlmittelkanälen oder Reaktionsgasführungskanälen der Bipolarplatte durch überschüssiges Fügemittel werden verhindert. Des Weiteren ist auf diese Weise der Fügemittelbedarf reduzierbar, da das Fügemittel nur in der exakt benötigten Menge aufgebracht wird. Eine mittels des Verfahrens erzielte Qualitätssteigerung bei der Fertigung der Bipolarplatten ermöglicht eine konstant hohe Leistungsfähigkeit bzw. eine Steigerung der Leistungsfähigkeit der Brennstoffzelle.The mask and its recesses allow optimal positioning of the joining agent on the base plate and the application of the joining agent with an optimal layer thickness. Such a structurally accurate application of the joining agent, the thermal connection of the two base plates, d. H. the soldering of the two base plates, optimized and, for example, faulty solder joints, insufficient and / or leaking connection of the two base plates or clogging of coolant channels or reaction gas guide channels of the bipolar plate by excess joining agent are prevented. Furthermore, the joining agent requirement can be reduced in this way, since the joining agent is applied only in the exact amount required. A quality improvement in the production of the bipolar plates achieved by means of the method enables a constant high performance or an increase in the performance of the fuel cell.
Im Gegensatz zum Stand der Technik müssen bei dem Verfahren keine Taschen für das Fügemittel in die Grundplatte bzw. Zwischenplatte eingebracht werden. Durch die Einsparung dieses Bearbeitungsschritts sind Fertigungszeiten und -kosten reduziert. Des Weiteren ist durch das Verlöten der Grundplatten, gegebenenfalls mit Anordnung einer Zwischenplatte, gegenüber anderen Verfahren, wie beispielsweise Laserschweißen oder Widerstandsschweißen, eine weitere Fertigungszeitreduktion und Fertigungskostenreduktion erzielbar, da mittels Löten die stoffschlüssigen Verbindungen zwischen den Grundplatten praktisch simultan und nicht zeitaufwändig nacheinander hergestellt werden können. Zudem treten beim Löten, im Gegensatz zum Schweißen, keine hohen lokalen Temperaturbelastungen auf, welche zu Beschädigungen der Grundplatten und dadurch der Bipolarplatte führen können.In contrast to the prior art, no pockets for the joining agent must be introduced into the base plate or intermediate plate in the process. By saving on this processing step, production times and costs are reduced. Furthermore, by soldering the base plates, optionally with the arrangement of an intermediate plate, over other methods, such as laser welding or resistance welding, a further production time reduction and manufacturing cost reduction can be achieved because the cohesive connections between the base plates can be produced virtually simultaneously and not time consuming sequentially by means of soldering , In addition, during soldering, in contrast to welding, no high local temperature stresses occur, which can lead to damage of the base plates and thus of the bipolar plate.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Bipolarplattebipolar
- 22
- Grundplattebaseplate
- 2.1, 2.22.1, 2.2
- Flächenseitesurface side
- 2.1.1, 2.2.12.1.1, 2.2.1
- Kanalstrukturchannel structure
- 2.1.22.1.2
- KanalbegrenzungsausformungenKanalbegrenzungsausformungen
- 33
- Fügemitteljoining means
- 44
- Maskemask
- 55
- Ausnehmungenrecesses
- 66
- Rakeldoctor
- 77
- Spritzdüsenozzle
- 88th
- Spritzwerkzeuginjection mold
- 99
- Walzeroller
- 1010
- Vorratsbehälterreservoir
- 1111
- Abstreiferscraper
Der Lötvorgang zum thermischen Verbinden der beiden Grundplatten wird vorzugsweise unter einer Schutzgasatmosphäre oder einer Vakuumatmosphäre durchgeführt, um Oxidbildungen zu verhindern.The soldering process for the thermal bonding of the two base plates is preferably under a protective gas atmosphere or a Vacuum atmosphere performed to prevent oxide formation.
Ausführungsbeispiele der Erfindung werden anhand von Zeichnungen näher erläutert.Embodiments of the invention will be explained in more detail with reference to drawings.
Dabei zeigen:Showing:
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.
Die Grundplatten
Um die Bipolarplatte
Der Lötvorgang zum thermischen Verbinden der beiden Grundplatten
Vor dem Verlöten wird das Fügemittel
Geometrische Ausformungen der Ausnehmungen
Die Maske
Des Weiteren ist auf diese Weise ein Fügemittelbedarf reduzierbar, da das Fügemittel
Das Fügemittel
In einer weiteren Ausführungsform des Verfahrens wird das Fügemittel
Das Fügemittel
In einer weiteren Ausführungsform wird das Fügemittel
In einer weiteren, in den
Die Walze
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102005020332 A1 [0002] DE 102005020332 A1 [0002]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010007705A DE102010007705A1 (en) | 2010-02-11 | 2010-02-11 | Method for manufacturing bipolar plate for fuel cell, involves thermally interconnecting base plates using bonding agent, and applying bonding agent on surface sides of base plate or intermediate plate via recesses formed in mask |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010007705A DE102010007705A1 (en) | 2010-02-11 | 2010-02-11 | Method for manufacturing bipolar plate for fuel cell, involves thermally interconnecting base plates using bonding agent, and applying bonding agent on surface sides of base plate or intermediate plate via recesses formed in mask |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010007705A1 true DE102010007705A1 (en) | 2011-08-11 |
Family
ID=44316704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102010007705A Withdrawn DE102010007705A1 (en) | 2010-02-11 | 2010-02-11 | Method for manufacturing bipolar plate for fuel cell, involves thermally interconnecting base plates using bonding agent, and applying bonding agent on surface sides of base plate or intermediate plate via recesses formed in mask |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102010007705A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022204913A1 (en) | 2022-05-18 | 2023-11-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process for producing a bipolar plate |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005020332A1 (en) | 2005-04-26 | 2006-11-02 | Reinz-Dichtungs-Gmbh | Supply plate manufacture involves introducing joining agent in pocket of first base plate, applying second base plate onto joining plane and effecting connection of base plates by impact of heat on joining plane |
-
2010
- 2010-02-11 DE DE102010007705A patent/DE102010007705A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005020332A1 (en) | 2005-04-26 | 2006-11-02 | Reinz-Dichtungs-Gmbh | Supply plate manufacture involves introducing joining agent in pocket of first base plate, applying second base plate onto joining plane and effecting connection of base plates by impact of heat on joining plane |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022204913A1 (en) | 2022-05-18 | 2023-11-23 | Robert Bosch Gesellschaft mit beschränkter Haftung | Process for producing a bipolar plate |
WO2023222311A2 (en) | 2022-05-18 | 2023-11-23 | Robert Bosch Gmbh | Method for producing a bipolar plate |
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Legal Events
Date | Code | Title | Description |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: H01M0008020000 Ipc: H01M0008029700 |
|
R081 | Change of applicant/patentee |
Owner name: ERDMANN, CHRISTIAN MARTIN, DR.-ING., DE Free format text: FORMER OWNER: DAIMLER AG, 70327 STUTTGART, DE |
|
R005 | Application deemed withdrawn due to failure to request examination |