WO2008003286A1 - Fuel cell stack assembly and method for clamping a fuel cell stack - Google Patents
Fuel cell stack assembly and method for clamping a fuel cell stack Download PDFInfo
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- WO2008003286A1 WO2008003286A1 PCT/DE2007/001084 DE2007001084W WO2008003286A1 WO 2008003286 A1 WO2008003286 A1 WO 2008003286A1 DE 2007001084 W DE2007001084 W DE 2007001084W WO 2008003286 A1 WO2008003286 A1 WO 2008003286A1
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- Prior art keywords
- fuel cell
- cell stack
- sleeve
- thermally insulated
- insulating material
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/248—Means for compression of the fuel cell stacks
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2404—Processes or apparatus for grouping 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
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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
- H01M8/24—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
- H01M8/2425—High-temperature cells with solid electrolytes
- H01M8/2432—Grouping of unit cells of planar configuration
-
- 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
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- 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
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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- 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 bracing a fuel cell stack.
- the invention further relates to an arrangement with a fuel cell stack, which is at least partially surrounded by a thermally insulating material and applied to the forces by means of a bracing device.
- Such methods and devices are known and are used, for example, in connection with SOFC fuel cells ("solid oxide fuel cell"). Since the voltage supplied by a fuel cell is determined by the electrochemical processes in the fuel cell, a plurality of fuel cells connected in series are used to provide a multiple of this voltage, wherein the superimposition of the individual anode, electrolyte and cathode existing fuel cell has proven.
- bonded fuel cell stacks can be damaged by vibrations, which can cause them to fall apart at temperatures above 800 ° C. These temperatures are readily achieved in the operation of SOFC fuel cells. Compressible seals that are compressed by an external rigid clamping often do not adequately seal.
- the invention has for its object to provide a method for bracing a fuel cell stack and an arrangement with a fuel cell stack under low apara- tive effort available. This object is achieved with the features of the independent claims.
- the invention relates to a method for bracing a fuel cell stack, wherein the fuel cell stack is at least partially enclosed with thermally insulating material, whereby a thermally insulated fuel cell assembly is provided, and the thermally insulated fuel cell assembly is at least partially enclosed by at least one elastic sleeve.
- a strain of a fuel cell stack makes complicated devices with tie rods etc. superfluous. Rather, an elastic sleeve is sufficient, which is pulled over the insulation of the fuel cell stack to hold together the thermally insulated fuel cell assembly and apply the required surface forces for bracing the fuel cell stack.
- a force transmitter after the provision of a thermally insulated fuel cell arrangement, which, due to its shape, modifies the forces to be applied by the subsequently-to-be-provided cuff to the thermally insulated fuel cell arrangement.
- a force transmitter can be adapted in its outer surface to the natural shape of the cuff, that is, it can give the thermally insulated fuel cell assembly at least in the region of the end plates cylindrical outer contour.
- a cuff which is essentially cylindrical in the relaxed state can thus be well received create the outer contour of the thermally insulated fuel cell arrangement, wherein the force acting on the actual fuel cell stack forces acting perpendicular to the fuel cell stack due to a flat system of force mediator.
- the invention builds on the generic arrangement in that the bracing device is an elastic sleeve, which at least partially surrounds the thermally insulating material.
- the assembly may be configured to provide at least one force mediator between the thermally insulating material and the cuff, which by virtue of its shape, modifies the forces applied by the cuff to the thermally insulated fuel cell assembly.
- the thermally insulating material modifies the forces applied by the sleeve to the thermally insulated fuel cell arrangement.
- the insulation itself is modified in its outer surface in order to realize the corresponding vertical forces on the fuel cell stack with good conditioning of the cuff.
- the arrangement is developed such that the sleeve consists of a uniform material.
- This is a particularly cost-effective solution because the cuff is simple.
- the sleeve has sleeve sections, which consist of different materials.
- the axial end regions of the essentially cylindrical sleeve in the relaxed state can consist of other materials, so that they bear well against the side surfaces of the fuel cell stack or the insulation present there, while the intervening regions of the sleeve are replaced by the sleeve Choice of material with regard to an optimal power transmission to the fuel cell stack can be designed.
- the sleeve at least partially consists of natural rubber.
- the sleeve consists at least partially of silicone rubber. Natural rubber is designed for temperatures up to about 90 ° C., while silicone rubber can withstand temperatures in the range of 220 ° C. Depending on the design of the fuel cell stack and the thermal insulation thus one or the other materials may be preferred.
- FIG. 1 shows in part a a fuel cell stack, in part b a thermal insulation and in part c a sleeve, in each case in a sectional representation;
- Figure 2 is a sectional view of a first embodiment of an inventive arrangement;
- Figure 3 is a sectional view of a second embodiment of an inventive arrangement.
- Figure 4 is a sectional view of a third embodiment of an inventive arrangement.
- FIG. 1 shows in part a a fuel cell stack, in part b a thermal insulation and in part c a sleeve, in each case in a sectional representation.
- the fuel cell stack 10 has a plurality of superposed plate-shaped fuel cells 20.
- the fuel cell stack 10 is cuboid or cube-shaped.
- a thermally insulating material 12 consists of several thermally insulating elements 22, such as porous plates.
- the division of the plates 22 indicated in FIG. 1b is arbitrary. In addition to the illustrated upper and side elements 22 not explicitly recognizable front and rear plates can be provided in the sectional view.
- thermally insulating material can also be used, for example fibrous material or beds of individual elements, for example porous spheres.
- the illustrated in Figure Ic in radial section Cuff 14 has a substantially axially symmetrical shape.
- FIG. 2 shows a sectional view of a first embodiment of an arrangement according to the invention.
- the fuel cell stack 10 is surrounded by the thermal insulation 12, so that a thermally insulated fuel cell assembly is available. This is edged by the cuff 14 tight.
- the sleeve 14 can on the one hand hold the thermally insulating material 12 together, provided that it does not already hold together by gluing or similar techniques, and furthermore apply a force perpendicular to the planes defined by the fuel cell elements 20. Consequently, the sleeve 14 provides the required tension of the fuel cell stack 10.
- thermally insulating material 12 is not provided in the form of a plate, but is present as a fill, for example, it may be sensible to securely secure it around the fuel cell stack 10 by means of a foil or other means to place and only later the cuff 14 raise.
- FIG. 3 shows a sectional view of a second embodiment of an arrangement according to the invention.
- force mediators 16, 18 are provided. These give the body around which the cuff 14 is laid, a partially cylindrical outer shape, whereby an adaptation to the shape of the sleeve 14 is present. While the forces applied to the force mediators 16, 18 have different directions, which is indicated by the arrows in FIG. 3, the thermal insulation 12 and thus also the fuel cell stack 10 have an effect the planes of the fuel cell 20 vertical forces, which is also indicated by arrows.
- FIG. 4 shows a sectional view of a third embodiment of an arrangement according to the invention.
- the thermally insulating material 12 is designed such that, in addition to the thermal insulation, it performs a useful force transmission, comparable to the effect of the force mediators 16, 18 according to FIG. 3.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
Anordnung mit einem Brennstoffzellenstapel und Verfahren zum Verspannen eines BrennstoffzellenstapelsArrangement with a fuel cell stack and method for clamping a fuel cell stack
Die Erfindung betrifft ein Verfahren zum Verspannen eines Brennstoffzellenstapels .The invention relates to a method for bracing a fuel cell stack.
Die Erfindung betrifft weiterhin eine Anordnung mit einem Brennstoffzellenstapel, der zumindest teilweise von einem thermisch isolierenden Material umgeben ist und auf den mittels einer Verspannvorrichtung Kräfte aufgebracht werden.The invention further relates to an arrangement with a fuel cell stack, which is at least partially surrounded by a thermally insulating material and applied to the forces by means of a bracing device.
Derartige Verfahren und Vorrichtungen sind bekannt und kommen beispielsweise im Zusammenhang mit SOFC- Brennstoffzellen ("Solid Oxid Fuel Cell") zum Einsatz. Da die von einer Brennstoffzelle gelieferte Spannung durch die elektrochemischen Vorgänge in der Brennstoffzelle festge- legt ist, werden mehrere hintereinander geschaltete Brennstoffzellen verwendet, um ein Vielfaches dieser Spannung zur Verfügung zu stellen, wobei sich die Übereinander- schichtung der einzelnen aus Anode, Elektrolyt und Kathode bestehenden Brennstoffzellen bewährt hat.Such methods and devices are known and are used, for example, in connection with SOFC fuel cells ("solid oxide fuel cell"). Since the voltage supplied by a fuel cell is determined by the electrochemical processes in the fuel cell, a plurality of fuel cells connected in series are used to provide a multiple of this voltage, wherein the superimposition of the individual anode, electrolyte and cathode existing fuel cell has proven.
Bei diesem Übereinanderschichten der Brennstoffzellen begegnet man Problemen, die insbesondere mit der mechanischen Stabilität des Brennstoffzellenstapels in Verbindung stehen. Die Bereitstellung einer ausreichenden Stabilität ist von grundsätzlicher Bedeutung und insbesondere bei mobilen Anwendungen, beispielsweise im Kraftfahrzeugbereich, besonders wichtig. Zahlreiche Lösungen zur Erhöhung der Stabilität von Brennstoffzellenstapeln sind bekannt. Hierzu zählt das Verkleben der einzelnen Stapelschichten, zum Beispiel durch Glaspaste, sowie das Aufbringen einer externen Kraft auf die Sta- pelenden, das heißt insbesondere auf die Endplatten, der Brennstoffzellenstapel . Ebenfalls ist es bekannt, lösbare kompressible Dichtungen zwischen den einzelnen Lagen zu verwenden und zusätzlich eine Kraft von außen auf die Stapelenden aufzubringen.In this stacking of the fuel cell to encounter problems that are particularly related to the mechanical stability of the fuel cell stack. The provision of sufficient stability is of fundamental importance and particularly important in mobile applications, for example in the automotive sector. Numerous solutions for increasing the stability of fuel cell stacks are known. This includes the bonding of the individual stacking layers, for example by glass paste, as well as the application of an external force to the stack ends, that is, in particular to the end plates, the fuel cell stack. It is also known to use releasable compressible seals between the individual layers and in addition to apply a force from the outside to the stack ends.
Diese und andere Lösungen zur Stabilitätserhöhung von Brennstoffzellen sind dazu geeignet, Teilprobleme der grundsätzlichen Stabilitätsproblematik zu lösen, sie sind jedoch nicht in der Lage, eine zufriedenstellende mechani- sehe Belastbarkeit der BrennstoffZellenanordnungen bereitzustellen. Beispielsweise können verklebte Brennstoffzellenstapel durch Vibrationen beschädigt werden, was dazu führen kann, dass sie bei Temperaturen oberhalb von 800 0C auseinanderfallen. Diese Temperaturen werden beim Betrieb von SOFC-Brennstoffzellen ohne weiteres erreicht. Kompressible Dichtungen, die durch eine externe starre Verspannung komprimiert werden, dichten häufig nur unzureichend ab.These and other solutions for increasing the stability of fuel cells are suitable for solving sub-problems of fundamental stability problems, but they are not able to provide a satisfactory mechanical load capacity of the fuel cell assemblies. For example, bonded fuel cell stacks can be damaged by vibrations, which can cause them to fall apart at temperatures above 800 ° C. These temperatures are readily achieved in the operation of SOFC fuel cells. Compressible seals that are compressed by an external rigid clamping often do not adequately seal.
Ein Beispiel für eine zuverlässige Verspannung, die auch im mobilen Einsatz Beschädigungen des Brennstoffzellenstapels vermeidet, ist in der DE 103 34 130 Al offenbart. Allerdings ist dort unter Verwendung von Endplatten und Zugankern beschriebene Lösung mit relativ hohem apparativem Aufwand verbunden.An example of a reliable bracing, which avoids damage to the fuel cell stack even in mobile use, is disclosed in DE 103 34 130 Al. However, there is associated with the use of end plates and tie rods described solution with relatively high equipment cost.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Verspannen eines Brennstoffzellenstapels sowie eine Anordnung mit einem Brennstoffzellenstapel unter geringem apara- tiven Aufwand zur Verfügung zu stellen. Diese Aufgabe wird mit den Merkmalen der unabhängigen Ansprüche gelöst.The invention has for its object to provide a method for bracing a fuel cell stack and an arrangement with a fuel cell stack under low apara- tive effort available. This object is achieved with the features of the independent claims.
Vorteilhafte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.Advantageous embodiments of the invention are indicated in the dependent claims.
Die Erfindung betrifft ein Verfahren zum Verspannen eines Brennstoffzellenstapels, bei dem der Brennstoffzellenstapel zumindest teilweise mit thermisch isolierendem Material eingefasst wird, wodurch eine thermisch isolierte BrennstoffZeilenanordnung bereitgestellt wird, und die thermisch isolierte BrennstoffZeilenanordnung mittels mindestens einer elastischen Manschette zumindest teilweise eingefasst wird. Eine derartige Verspannung eines Brennstoffzellenstapels macht aufwändige Vorrichtungen mit Zugankern etc. ü- berflüssig. Vielmehr reicht eine elastische Manschette aus, die über die Isolierung des Brennstoffzellenstapels gezogen wird, um die thermisch isolierte Brennstoffzellenanordnung zusammenzuhalten und die erforderlichen Flächenkräfte zum Verspannen des Brennstoffzellenstapels aufzubringen.The invention relates to a method for bracing a fuel cell stack, wherein the fuel cell stack is at least partially enclosed with thermally insulating material, whereby a thermally insulated fuel cell assembly is provided, and the thermally insulated fuel cell assembly is at least partially enclosed by at least one elastic sleeve. Such a strain of a fuel cell stack makes complicated devices with tie rods etc. superfluous. Rather, an elastic sleeve is sufficient, which is pulled over the insulation of the fuel cell stack to hold together the thermally insulated fuel cell assembly and apply the required surface forces for bracing the fuel cell stack.
Unter Umständen kann nützlich sein, dass nach dem Bereitstellen einer thermisch isolierten Brennstoffzellenanord- nung mindestens ein Kraftvermittler vorgesehen wird, der aufgrund seiner Gestalt die von der nachfolgend vorzusehenden Manschette auf die thermisch isolierte BrennstoffZeilenanordnung aufzubringenden Kräfte modifiziert. Ein solcher Kraftvermittler kann in seiner äußeren Oberfläche an die natürliche Form der Manschette angepasst sein, das heißt er kann der thermisch isolierten BrennstoffZeilenanordnung eine zumindest im Bereich der Endplatten zylindrische Außenkontur vermitteln. Eine im entspannten Zustand im Wesentlichen zylindrische Manschette kann sich somit gut an die Außenkontur der thermisch isolierten Brennstoffzellen- anordnung anlegen, wobei die auf den eigentlichen Brennstoffzellenstapel wirkenden Kräfte aufgrund einer ebenen Anlage der Kraftvermittler senkrecht auf den Brennstoffzel- lenstapel wirken.Under certain circumstances, it may be useful to provide at least one force transmitter after the provision of a thermally insulated fuel cell arrangement, which, due to its shape, modifies the forces to be applied by the subsequently-to-be-provided cuff to the thermally insulated fuel cell arrangement. Such a force transmitter can be adapted in its outer surface to the natural shape of the cuff, that is, it can give the thermally insulated fuel cell assembly at least in the region of the end plates cylindrical outer contour. A cuff which is essentially cylindrical in the relaxed state can thus be well received create the outer contour of the thermally insulated fuel cell arrangement, wherein the force acting on the actual fuel cell stack forces acting perpendicular to the fuel cell stack due to a flat system of force mediator.
Die Erfindung baut auf der gattungsgemäßen Anordnung dadurch auf, dass die Verspannvorrichtung eine elastische Manschette ist, die das thermisch isolierende Material zu- mindest teilweise umgibt. Die beschriebenen Vorteile und Besonderheiten des erfindungsgemäßen Verfahrens werden somit auch durch die erfindungsgemäße Anordnung realisiert.The invention builds on the generic arrangement in that the bracing device is an elastic sleeve, which at least partially surrounds the thermally insulating material. The described advantages and special features of the method according to the invention are therefore also realized by the arrangement according to the invention.
Die Anordnung kann so ausgebildet sein, dass mindestens ein Kraftvermittler zwischen dem thermisch isolierenden Material und der Manschette vorgesehen ist, der aufgrund seiner Gestalt die von der Manschette auf die thermisch isolierte BrennstoffZeilenanordnung aufgebrachten Kräfte modifiziert.The assembly may be configured to provide at least one force mediator between the thermally insulating material and the cuff, which by virtue of its shape, modifies the forces applied by the cuff to the thermally insulated fuel cell assembly.
Ebenfalls kann vorgesehen sein, dass das thermisch isolierende Material aufgrund seiner Gestalt die von der Manschette auf die thermisch isolierte Brennstoffzellenanord- nung aufgebrachten Kräfte modifiziert. Anstelle der Kraftvermittler zwischen der Isolierung und der Manschette kann auch vorgesehen sein, dass die Isolierung selbst in ihrer äußeren Oberfläche modifiziert ist, um die entsprechenden senkrechten Kräfte auf den Brennstoffzellenstapel bei guter Anlage der Manschette zu realisieren.It can also be provided that, due to its shape, the thermally insulating material modifies the forces applied by the sleeve to the thermally insulated fuel cell arrangement. Instead of the force mediator between the insulation and the cuff can also be provided that the insulation itself is modified in its outer surface in order to realize the corresponding vertical forces on the fuel cell stack with good conditioning of the cuff.
Gemäß einer besonders bevorzugten Ausführungsform ist die Anordnung derart weitergebildet, dass die Manschette aus einem einheitlichen Material besteht. Dabei handelt es sich um eine besonders kostengünstige Lösung, da die Manschette einfach aufgebaut ist. Es kann aber auch von Vorteil sein, dass die Manschette Manschettenabschnitte aufweist, die aus verschiedenen Materialien bestehen. Beispielsweise können die axialen Endbe- reiche der im entspannten Zustand im Wesentlichen zylindrischen Manschette aus anderen Materialien bestehen, so dass sich diese gut an die Seitenflächen des Brennstoffzellen- stapels beziehungsweise der dort vorhandenen Isolierung anlegen, während die dazwischen liegenden Bereiche der Man- schette durch die Materialwahl im Hinblick auf eine optimale Kraftübertragung auf den Brennstoffzellenstapel ausgelegt werden können.According to a particularly preferred embodiment, the arrangement is developed such that the sleeve consists of a uniform material. This is a particularly cost-effective solution because the cuff is simple. But it may also be advantageous that the sleeve has sleeve sections, which consist of different materials. For example, the axial end regions of the essentially cylindrical sleeve in the relaxed state can consist of other materials, so that they bear well against the side surfaces of the fuel cell stack or the insulation present there, while the intervening regions of the sleeve are replaced by the sleeve Choice of material with regard to an optimal power transmission to the fuel cell stack can be designed.
Es kann bevorzugt sein, dass die Manschette zumindest teil- weise aus Naturkautschuk besteht.It may be preferred that the sleeve at least partially consists of natural rubber.
Ebenfalls ist es möglich, dass die Manschette zumindest teilweise aus Silikonkautschuk besteht. Naturkautschuk ist für Temperaturen bis etwa 90 0C ausgelegt, während Silikon- kautschuk Temperaturen im Bereich von 220 0C standhält. Je nach Auslegung des Brennstoffzellenstapels und der thermischen Isolierung können somit die einen oder die anderen Materialien bevorzugt sein.It is also possible that the sleeve consists at least partially of silicone rubber. Natural rubber is designed for temperatures up to about 90 ° C., while silicone rubber can withstand temperatures in the range of 220 ° C. Depending on the design of the fuel cell stack and the thermal insulation thus one or the other materials may be preferred.
Die Erfindung wird nun mit Bezug auf die begleitendenThe invention will now be described with reference to the accompanying drawings
Zeichnungen anhand besonders bevorzugter Ausführungsformen beispielhaft erläutert.Drawings exemplified with reference to particularly preferred embodiments.
Es zeigen:Show it:
Figur 1 in Teil a einen Brennstoffzellenstapel, in Teil b eine thermische Isolierung und in Teil c eine Manschette, jeweils in geschnittener Darstellung; Figur 2 eine Schnittansicht einer ersten Ausführungsform einer erfindungsgemäßen Anordnung;FIG. 1 shows in part a a fuel cell stack, in part b a thermal insulation and in part c a sleeve, in each case in a sectional representation; Figure 2 is a sectional view of a first embodiment of an inventive arrangement;
Figur 3 eine Schnittansicht einer zweiten Ausführungsform einer erfindungsgemäßen Anordnung; undFigure 3 is a sectional view of a second embodiment of an inventive arrangement; and
Figur 4 eine Schnittansicht einer dritten Ausführungsform einer erfindungsgemäßen Anordnung.Figure 4 is a sectional view of a third embodiment of an inventive arrangement.
Bei der nachfolgenden Beschreibung der Zeichnungsfiguren bezeichnen gleiche Bezugszeichen gleiche oder vergleichbare Komponenten .In the following description of the drawing figures, like reference numerals designate the same or similar components.
Figur 1 zeigt in Teil a einen Brennstoffzellenstapel, in Teil b eine thermische Isolierung und in Teil c eine Manschette, jeweils in geschnittener Darstellung. Der Brennstoffzellenstapel 10 weist mehrere übereinander liegende plattenförmig ausgebildete Brennstoffzellen 20 auf. Im vorliegenden Ausführungsbeispiel ist der Brennstoffzellensta- pel 10 quader- beziehungsweise würfelförmig. Die vorliegende Erfindung lässt sich jedoch auch auf sämtliche andere geometrische Gestalten anwenden, so lange sie ein Stapeln von Brennstoffzellen 20 erlauben. Ein thermisch isolierendes Material 12 besteht aus mehreren thermisch isolierenden Elementen 22, beispielsweise porösen Platten. Die in Figur Ib angegebene Aufteilung der Platten 22 ist willkürlich. Neben den dargestellten oberen und seitlichen Elementen 22 können auch in der Schnittansicht nicht explizit erkennbare vordere und hintere Platten vorgesehen sein. Neben porösen Platten ist auch anderes thermisch isolierendes Material einsetzbar, beispielsweise faseriges Material beziehungsweise Schüttungen einzelner Elemente, beispielsweise poröser Kugeln. Die in Figur Ic im Radialschnitt dargestellte Manschette 14 hat eine im Wesentlichen axialsymmetrische Gestalt.FIG. 1 shows in part a a fuel cell stack, in part b a thermal insulation and in part c a sleeve, in each case in a sectional representation. The fuel cell stack 10 has a plurality of superposed plate-shaped fuel cells 20. In the present exemplary embodiment, the fuel cell stack 10 is cuboid or cube-shaped. However, the present invention is applicable to all other geometrical shapes as long as they allow stacking of fuel cells 20. A thermally insulating material 12 consists of several thermally insulating elements 22, such as porous plates. The division of the plates 22 indicated in FIG. 1b is arbitrary. In addition to the illustrated upper and side elements 22 not explicitly recognizable front and rear plates can be provided in the sectional view. In addition to porous plates, other thermally insulating material can also be used, for example fibrous material or beds of individual elements, for example porous spheres. The illustrated in Figure Ic in radial section Cuff 14 has a substantially axially symmetrical shape.
Figur 2 zeigt eine Schnittansicht einer ersten Ausführungs- form einer erfindungsgemäßen Anordnung. Der Brennstoffzel- lenstapel 10 ist von der thermischen Isolierung 12 umgeben, so dass eine thermisch isolierte BrennstoffZellenanordnung zur Verfügung steht . Diese wird von der Manschette 14 straff eingefasst. Die Manschette 14 kann so einerseits das thermisch isolierende Material 12 zusammenhalten, sofern dieses nicht ohnehin schon durch Kleben oder ähnliche Techniken zusammenhält, und weiterhin eine Kraft senkrecht zu den von den Brennstoffzellelementen 20 definierten Ebenen aufbringen. Folglich liefert die Manschette 14 die erfor- derliche Verspannung des Brennstoffzellenstapels 10. Falls das thermisch isolierende Material 12 nicht plattenförmig bereitgestellt wird, sondern beispielsweise als Schüttung vorliegt, kann es sinnvoll sein, dieses zunächst mittels einer Folie oder einer sonstigen Einrichtung sicher um den Brennstoffzellenstapel 10 zu platzieren und erst nachträglich die Manschette 14 aufzuziehen.FIG. 2 shows a sectional view of a first embodiment of an arrangement according to the invention. The fuel cell stack 10 is surrounded by the thermal insulation 12, so that a thermally insulated fuel cell assembly is available. This is edged by the cuff 14 tight. The sleeve 14 can on the one hand hold the thermally insulating material 12 together, provided that it does not already hold together by gluing or similar techniques, and furthermore apply a force perpendicular to the planes defined by the fuel cell elements 20. Consequently, the sleeve 14 provides the required tension of the fuel cell stack 10. If the thermally insulating material 12 is not provided in the form of a plate, but is present as a fill, for example, it may be sensible to securely secure it around the fuel cell stack 10 by means of a foil or other means to place and only later the cuff 14 raise.
Figur 3 zeigt eine Schnittansicht einer zweiten Ausführungsform einer erfindungsgemäßen Anordnung. Um die Kraft- Übertragung auf den Brennstoffzellenstapel 10 zu verbessern, sind Kraftvermittler 16, 18 vorgesehen. Diese geben dem Körper, um den die Manschette 14 gelegt ist, eine abschnittsweise zylindrische Außengestalt, wodurch eine Anpassung an die Form der Manschette 14 vorliegt. Während die auf die Kraftvermittler 16, 18 aufgebrachten Kräfte unterschiedliche Richtungen aufweisen, was durch die Pfeile in Figur 3 angedeutet ist, wirken auf die thermische Isolierung 12 und somit auch auf den Brennstoffzellenstapel 10 zu den Ebenen der Brennstoffzellen 20 senkrechte Kräfte, was ebenfalls durch Pfeile gekennzeichnet ist.FIG. 3 shows a sectional view of a second embodiment of an arrangement according to the invention. In order to improve the power transmission to the fuel cell stack 10, force mediators 16, 18 are provided. These give the body around which the cuff 14 is laid, a partially cylindrical outer shape, whereby an adaptation to the shape of the sleeve 14 is present. While the forces applied to the force mediators 16, 18 have different directions, which is indicated by the arrows in FIG. 3, the thermal insulation 12 and thus also the fuel cell stack 10 have an effect the planes of the fuel cell 20 vertical forces, which is also indicated by arrows.
Figur 4 zeigt eine Schnittansicht einer dritten Ausfüh- rungsform einer erfindungsgemäßen Anordnung. In diesem Fall ist das thermisch isolierende Material 12 derart ausgebildet, dass es neben der thermischen Isolierung eine nützliche Kraftvermittlung übernimmt, vergleichbar zur Wirkung der Kraftvermittler 16, 18 gemäß Figur 3.FIG. 4 shows a sectional view of a third embodiment of an arrangement according to the invention. In this case, the thermally insulating material 12 is designed such that, in addition to the thermal insulation, it performs a useful force transmission, comparable to the effect of the force mediators 16, 18 according to FIG. 3.
Die in der vorstehenden Beschreibung, in den Zeichnungen sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung wesentlich sein.The features of the invention disclosed in the foregoing description, in the drawings and in the claims may be essential to the realization of the invention both individually and in any combination.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
10 Brennstoffzellenstapel10 fuel cell stacks
12 thermische Isolierung12 thermal insulation
14 Manschette 16 Kraftvermittler14 Cuff 16 Force Mediator
18 Kraftvermittler18 force agents
20 Brennstoffzelle20 fuel cell
22 isolierende Elemente 22 insulating elements
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006030605A DE102006030605A1 (en) | 2006-07-03 | 2006-07-03 | Arrangement with a fuel cell stack and method for clamping a fuel cell stack |
| DE102006030605.8 | 2006-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008003286A1 true WO2008003286A1 (en) | 2008-01-10 |
Family
ID=38521456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2007/001084 Ceased WO2008003286A1 (en) | 2006-07-03 | 2007-06-20 | Fuel cell stack assembly and method for clamping a fuel cell stack |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102006030605A1 (en) |
| WO (1) | WO2008003286A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008089977A1 (en) * | 2007-01-26 | 2008-07-31 | Topsoe Fuel Cell | Fuel cell stack clamping structure and solid oxide fuel cell stack |
| WO2010102815A1 (en) | 2009-03-13 | 2010-09-16 | Topsoe Fuel Cell A/S | Compression casing for a fuel cell stack and a method for manufacturing a compression casing for a fuel cell stack |
| WO2011157351A1 (en) | 2010-06-17 | 2011-12-22 | Topsøe Fuel Cell A/S | Force distributor for a fuel cell stack or an electrolysis cell stack |
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| DE102008059966B4 (en) | 2008-12-02 | 2011-06-22 | Daimler AG, 70327 | Battery having a plurality of battery cells arranged in a cell assembly and using a battery |
| EP3557673B1 (en) * | 2013-03-08 | 2020-11-25 | Nuvera Fuel Cells, LLC | Electrochemical stack |
| DE102013212899A1 (en) * | 2013-07-02 | 2015-01-08 | Bayerische Motoren Werke Aktiengesellschaft | Tension system for a fuel cell system |
| DE102013013723B4 (en) * | 2013-08-20 | 2015-04-23 | Stephan Köhne | Apparatus for clamping a fuel cell stack for power and / or heat generation with integrated temperature control of the fuel cell stack |
| US11746427B2 (en) | 2021-07-05 | 2023-09-05 | EvolOH, Inc. | Scalable electrolysis cell and stack and method of high-speed manufacturing the same |
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| CH486784A (en) * | 1967-09-20 | 1970-02-28 | Ferranti Ltd | Fuel element with carbonate electrolyte melted at working temperature and process for its production |
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| US5993987A (en) * | 1996-11-19 | 1999-11-30 | Ballard Power Systems Inc. | Electrochemical fuel cell stack with compression bands |
| US6040072A (en) * | 1997-11-19 | 2000-03-21 | Lynntech, Inc. | Apparatus and method for compressing a stack of electrochemical cells |
| WO1999027602A1 (en) * | 1997-11-25 | 1999-06-03 | Ballard Power Systems Inc. | Compression assembly for an electrochemical fuel cell stack |
| US20050064268A1 (en) * | 2003-04-11 | 2005-03-24 | Kyu Taek Cho | Fastening mechanism of a fuel cell stack |
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| WO2008089977A1 (en) * | 2007-01-26 | 2008-07-31 | Topsoe Fuel Cell | Fuel cell stack clamping structure and solid oxide fuel cell stack |
| JP2010517230A (en) * | 2007-01-26 | 2010-05-20 | トプサー・フューエル・セル・アクチエゼルスカベット | Clamp structure of fuel cell stack and solid oxide fuel cell stack |
| WO2010102815A1 (en) | 2009-03-13 | 2010-09-16 | Topsoe Fuel Cell A/S | Compression casing for a fuel cell stack and a method for manufacturing a compression casing for a fuel cell stack |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102006030605A1 (en) | 2008-01-10 |
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