EP2102934A1 - Housing for receiving and tensioning at least one fuel cell stack - Google Patents

Housing for receiving and tensioning at least one fuel cell stack

Info

Publication number
EP2102934A1
EP2102934A1 EP07846278A EP07846278A EP2102934A1 EP 2102934 A1 EP2102934 A1 EP 2102934A1 EP 07846278 A EP07846278 A EP 07846278A EP 07846278 A EP07846278 A EP 07846278A EP 2102934 A1 EP2102934 A1 EP 2102934A1
Authority
EP
European Patent Office
Prior art keywords
housing
fuel cell
cell stack
clamping
clamping body
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Withdrawn
Application number
EP07846278A
Other languages
German (de)
French (fr)
Inventor
Jens Hafemeister
Matthias Boltze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enerday GmbH
Original Assignee
Enerday GmbH
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 Enerday GmbH filed Critical Enerday GmbH
Publication of EP2102934A1 publication Critical patent/EP2102934A1/en
Withdrawn legal-status Critical Current

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
    • H01M8/24—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
    • H01M8/24—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
    • 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
    • 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

  • Housing for receiving and clamping at least one fuel cell stack
  • the invention relates to a housing for receiving at least one fuel cell stack with a housing portion which is designed such that it can at least partially accommodate the fuel cell stack.
  • the invention relates to a system with such a housing and at least one fuel cell stack received therein.
  • Fuel cell systems particularly SOFC (Solid Oxide Fuel Cell) fuel cell systems, typically include a reformer, an afterburner, an SOFC fuel cell stack, etc.
  • SOFC fuel cell stack is conventionally subject to a defined one Distortion produced. This strain must be ensured during manufacture and beyond during storage and installation in the fuel cell system initially by a temporary tension. Subsequently, a final tension of the fuel cell stack is effected by clamping means usually provided on the fuel cell stack.
  • DE 195 17 042 C1 describes a fuel cell arrangement in which a fuel cell stack is arranged within a generic housing or accommodated therein. At the end of the fuel cell stack, a bellows is provided as the tensioning means. see, which is supported on the housing and thereby can apply a force on the fuel cell stack for clamping the fuel cell stack. In order to be able to adjust or modify the corresponding force appropriately, a gas can be passed under pressure into the bellows from outside the housing.
  • the invention has the object of developing the generic housing Shen such that the aforementioned disadvantages can be at least partially overcome. This object is solved by the features of the independent claim.
  • the housing according to the invention builds on the generic state of the art in that clamping means are provided, through which the fuel cell stack can be clamped via at least one opening of the housing section.
  • clamping means are understood to mean those components which cause the stress of the fuel cell stack due to a force transmission.
  • the housing according to the invention can be designed in particular as a so-called hot box for receiving and clamping fuel cell stacks, which is thermally insulated to the outside.
  • the adjustment of the fuel cell stack or the setting of the clamping of the fuel cell stack can take place via a plurality of openings.
  • the setting of the tension and thus the assembly of the fuel cell stack in the hot box can be greatly simplified due to the design, resulting in a relatively inexpensive solution.
  • the housing according to the invention can be developed in an advantageous manner such that the clamping means comprise a clamping body which is inserted into the opening for bracing the fuel cell stack.
  • the clamping means comprise a clamping body which is inserted into the opening for bracing the fuel cell stack.
  • NEN on the housing portion may be provided one or more cylindrical openings, in particular cylinder can be inserted or used.
  • the cylinders can be braced for example by a pressure plate against the corresponding fuel cell stack.
  • the housing according to the invention can be realized such that the clamping body can be tensioned against the fuel cell stack via a force of at least one elastic element.
  • a permanent clamping of the fuel cell stack can also be achieved taking into account the shrinkage behavior of high-temperature insulation.
  • the tension of the fuel cell stack can be accurately metered by suitable choice or design and placement of the elastic element.
  • the clamping forces of the respective fuel cell stacks can be adjusted individually via the multiplicity of elastic elements used.
  • the housing according to the invention may preferably be formed such that the force of the externally attached to the housing portion at least one elastic element via a pressure element on the clamping body can be applied.
  • the pressure element can clamp the fuel cell stack, for example against the housing portion due to the force caused by the elastic element.
  • the housing according to the invention can be realized so that the clamping body is a ceramic cylinder.
  • the housing according to the invention may be such that the elastic element comprises at least one spring.
  • the elastic element comprises at least one spring.
  • the housing according to the invention can be developed so that the pressure element is a pressure plate or a clamping frame.
  • the pressure plate for example, externally screwed to a metal shell of the housing section, for example, to housing parts of the Hotbox and biased by elastic elements against ceramic cylinder, so that they in turn clamp the fuel cell stack.
  • the clamping by means of the clamping frame is also possible, which is provided, for example, at least partially enclosing the hot box on the outside of the housing parts.
  • the housing according to the invention so that a plurality of clamping bodies can be tensioned against the fuel cell stack via the pressure plate.
  • the clamping bodies can be uniformly biased onto a fuel cell stacked end face.
  • a uniform strain of the fuel cell stack can be achieved by the uniform distribution of the clamping body.
  • the housing according to the invention can be realized in such a way that the housing section is formed from high-temperature-resistant insulating material.
  • the hotbox consists of high temperature resistant insulation material.
  • the housing according to the invention can be formed so that the housing portion is surrounded by a metal sheath. The insulation material used for the Hotbox can be captured and protected by a metal sheath.
  • the housing according to the invention is developed in an advantageous manner such that the fuel cell stack can be clamped by the clamping means in the stacking direction against the housing portion.
  • the invention also relates to a system with the housing according to the invention and at least one fuel cell stack accommodated therein.
  • Figure 1 is an isometric view of the housing according to the invention.
  • FIG. 2 shows a sectional view of the housing according to the invention from FIG. 1.
  • Figures 1 and 2 show a housing 10 according to the invention in an isometric view and in a
  • the housing 10 is formed in this embodiment by a hot box and comprises a housing section forming a housing section. Part 14, which surrounds a fuel cell stack or fuel cell stack 24 at least partially.
  • the housing part 14 is coupled to a further housing part 12 in such a way that the fuel cell stack 24 is completely enclosed by the housing parts 14, 12.
  • the coupling or the housing part closure 18 of both housing parts 12, 14 is realized in a manner known to those skilled and can be performed arbitrarily, for example by a snap fastener, a Fedklapp- tensioner, a KlippverInstitut etc.
  • the fuel cell stack 24 is in the illustrated case in the housing part 14 arranged so that it is in contact with a bottom surface on a lower housing wall of the housing part 14 and with a side surface to a housing side wall of the housing part 14 in touch.
  • the stacking direction of the fuel cell stack 24 corresponds to the vertical direction of FIG. 2.
  • Three cylindrical openings 30 are provided on an upper housing wall of the housing part 14 opposite the lower housing wall, above the fuel cell stack 24 (only one is shown in FIG. 2), about the
  • Clamping means 28 can apply a corresponding strain on the fuel cell stack 24, as will be explained in detail below.
  • the clamping means 28 each comprise a ceramic cylinder 26 inserted into the corresponding opening 30, which is movable in the opening 30 due to a slight play.
  • the ceramic cylinder 26 is in contact with the fuel cell stack 24 and is aligned through the opening 30 in the stacking direction of the fuel cell stack 24.
  • the ceramic cylinder 26 is in contact with a pressure plate 22 of the tensioning means 28.
  • the pressure plate 22 is exteriorly connected to the housing part 14 via at least one screw connection, which comprises an elastic element 20. introduced.
  • the pressure plate 22 is movably guided by the screw connection while at the same time being biased against the corresponding ceramic cylinder 26 by the elastic element 20 provided in the form of a spring on the screw connection.
  • the bias voltage can be implemented, for example, by a spring arranged between a screw head and the pressure plate 22 and correspondingly designed.
  • the tension applied to the corresponding ceramic cylinders 26 ultimately causes the tensioning of the corresponding fuel cell stack 24.
  • the tension can be precisely adjusted or adjusted by tightening or loosening the screw connection.
  • the mutually coupled housing parts 12, 14 further Kotnpo- nenten 16 of a fuel cell system at least partially received, which are formed in the illustrated case by pipes 16.
  • These pipelines 16 can originate, for example, from a reformer or afterburner of the fuel cell system.
  • the housing parts 12, 14 each equipped with a pipe diameter of the pipes 16 adapted recesses, so that the pipes 16 can pass through the housing 10 adjacent to the fuel cell stack 24.
  • a plurality of tensioning means 28 are provided for the respective tensioning of the corresponding fuel cell stack. It is also conceivable that a plurality of fuel cell stacks 24 are clamped by ceramic cylinders 26, which are biased only by a correspondingly sized, ie larger, pressure plate 22 against the fuel cell stack 24.

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

The invention relates to a housing (10) for receiving at least one fuel cell stack (24), comprising a housing section (14) that is embodied such that it can at least partially receive the fuel cell stack (24). According to the invention, the tensioning means (28) are provided to maintain the tension on the fuel cell stack (24) by means of at least one opening (30) of the housing section (14). The invention also relates to a system comprising said type of housing (10) and at least one fuel cell stack (24) that is received therein.

Description

Gehäuse zur Aufnahme und Verspannung zumindest eines BrennstoffzellenstapelsHousing for receiving and clamping at least one fuel cell stack
Die Erfindung betrifft ein Gehäuse zum Aufnehmen zumindest eines Brennstoffzellenstapels mit einem Gehäuseabschnitt, der derart ausgebildet ist, dass er den Brennstoffzellen- stapel zumindest teilweise aufnehmen kann.The invention relates to a housing for receiving at least one fuel cell stack with a housing portion which is designed such that it can at least partially accommodate the fuel cell stack.
Weiterhin betrifft die Erfindung ein System mit einem derartigen Gehäuse und zumindest einem darin aufgenommenen Brennstoffzellenstapel .Furthermore, the invention relates to a system with such a housing and at least one fuel cell stack received therein.
Brennstoffzellensysteme, insbesondere SOFC-Brennstoff- zellensysteme (SOFC = "Solid Oxide Fuel Cell"), umfassen üblicherweise einen Reformer, einen Nachbrenner, einen SOFC-Brennstoffzellenstapel beziehungsweise -Stack etc. Im Hinblick auf die Fertigung wird der SOFC-Brennstoffzellenstapel herkömmlicherweise unter einer definierten Verspan- nung hergestellt. Diese Verspannung muss während der Fertigung und darüber hinaus während der Lagerung sowie des Einbaus in das Brennstoffzellensystem zunächst durch eine temporäre Verspannung gewährleistet werden. Anschließend wird eine endgültige Verspannung des Brennstoffzellenstapels durch üblicherweise an dem Brennstoffzellenstapel vorgesehene Spannmittel bewirkt.Fuel cell systems, particularly SOFC (Solid Oxide Fuel Cell) fuel cell systems, typically include a reformer, an afterburner, an SOFC fuel cell stack, etc. In terms of manufacturing, the SOFC fuel cell stack is conventionally subject to a defined one Distortion produced. This strain must be ensured during manufacture and beyond during storage and installation in the fuel cell system initially by a temporary tension. Subsequently, a final tension of the fuel cell stack is effected by clamping means usually provided on the fuel cell stack.
Beispielsweise ist in der DE 195 17 042 Cl eine Brennstoff- Zellenanordnung beschrieben, bei der ein Brennstoffzellen- Stapel innerhalb eines gattungsgemäßen Gehäuses angeordnet beziehungsweise darin aufgenommen ist. An dem Brennstoff- zellenstapel ist endständig ein Balg als Spannmittel vorge- sehen, der sich an dem Gehäuse abstützt und dadurch auf den Brennstoffzellenstapel eine Kraft zur Verspannung des Brennstoffzellenstapels aufbringen kann. Um die entsprechende Kraft geeignet einstellen oder modifizieren zu kön- nen, kann von außerhalb des Gehäuses ein Gas unter Druck in den Balg geleitet werden.For example, DE 195 17 042 C1 describes a fuel cell arrangement in which a fuel cell stack is arranged within a generic housing or accommodated therein. At the end of the fuel cell stack, a bellows is provided as the tensioning means. see, which is supported on the housing and thereby can apply a force on the fuel cell stack for clamping the fuel cell stack. In order to be able to adjust or modify the corresponding force appropriately, a gas can be passed under pressure into the bellows from outside the housing.
Eine weitere Möglichkeit der Verspannung ist aus der DE 103 08 382 B3 bekannt. Entsprechend diesem dem Stand der Tech- nik angehörenden Dokument wird der Brennstoffzellenstapel nach dem Abkühlen im Ofen zunächst mit einer temporären Verspannvorrichtung beziehungsweise Spannmitteln verspannt, anschließend eine Isolation des Brennstoffzellenstapels vorgenommen, außerhalb der Isolation eine endgültige Ver- Spannvorrichtung beziehungsweise Spannmittel vorgesehen und dann die temporären Spannmittel entfernt. Insbesondere die Vornahme dieser Art von Verspannung hat jedoch den Nachteil, dass die Verspannung, falls die hochtemperaturbeständige Isolation unter Druck und hoher Temperatur schwindet, diesem Schwinden nicht in ausreichendem Maße begegnet. Dadurch kann die Verspannung des Brennstoffzellenstapels nicht dauerhaft gewährleistet werden. Darüber hinaus ist diese Verspannung nur unter erheblichen Montageaufwand durchführbar, so dass keine montagegünstige Lösung zur Ver- fügung gestellt wird. Ebenso wenig können im Falle von mehreren Brennstoffzellenstacks unterschiedliche Verspannungen der jeweiligen Brennstoffzellenstacks realisiert werden.Another way of clamping is known from DE 103 08 382 B3. According to this prior art document, the fuel cell stack after cooling in the furnace is first clamped with a temporary tensioning device or clamping means, then an insulation of the fuel cell stack made, provided outside the insulation a final Ver clamping device or clamping means and then the temporary clamping means away. In particular, however, the provision of this type of bracing has the disadvantage that the tension, if the high temperature resistant insulation shrinks under pressure and high temperature, does not adequately counteract this shrinkage. As a result, the tension of the fuel cell stack can not be guaranteed permanently. In addition, this bracing is feasible only with considerable installation effort, so that no easy to install solution is provided. Likewise, in the case of multiple fuel cell stacks different tensions of the respective fuel cell stacks can be realized.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemä- ßen Gehäuse derart weiterzubilden, dass die vorgenannten Nachteile zumindest teilweise überwunden werden können. Diese Aufgabe wird durch die Merkmale des unabhängigen Anspruchs gelöst.The invention has the object of developing the generic housing Shen such that the aforementioned disadvantages can be at least partially overcome. This object is solved by the features of the independent claim.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfin- düng ergeben sich aus den abhängigen Ansprüchen.Advantageous embodiments and further developments of the invention düng result from the dependent claims.
Das erfindungsgemäße Gehäuse baut auf dem gattungsgemäßen Stand der Technik dadurch auf, dass Spannmittel vorgesehen sind, durch die der Brennstoffzellenstapel über zumindest eine Öffnung des Gehäuseabschnitts verspannbar ist. In diesem Zusammenhang werden unter Spannmitteln jene Komponenten verstanden, die die Verspannung des Brennstoffzellenstapels aufgrund einer Kraftübertragung bewirken. Das erfindungsgemäße Gehäuse kann insbesondere als eine so genannte Hotbox zur Aufnahme und Verspannung von Brennstoffzellenstapeln ausgebildet sein, die nach außen thermisch isoliert ist. Durch das Vorsehen der Öffnung in dem Gehäuseabschnitt, beispielsweise eines Gehäuseteils beziehungsweise mehrerer Gehäuseteile, kann der Brennstoffzellenstack über die Öff- nung durch die Spannmittel exakt justiert werden, wodurch die Verspannung des BrennstoffZeilenstacks leicht einstellbar ist. Ebenso kann die Justierung des Brennstoffzel- lenstacks beziehungsweise die Einstellung der Verspannung des Brennstoffzellenstacks über mehrere Öffnungen erfolgen. Somit lässt sich das Einstellen der Verspannung und damit die Montage des Brennstoffzellenstacks in der Hotbox kon- struktionsbedingt stark vereinfachen, wodurch eine relativ kostengünstige Lösung vorliegt.The housing according to the invention builds on the generic state of the art in that clamping means are provided, through which the fuel cell stack can be clamped via at least one opening of the housing section. In this context, clamping means are understood to mean those components which cause the stress of the fuel cell stack due to a force transmission. The housing according to the invention can be designed in particular as a so-called hot box for receiving and clamping fuel cell stacks, which is thermally insulated to the outside. By providing the opening in the housing section, for example a housing part or a plurality of housing parts, the fuel cell stack can be precisely adjusted via the opening by the clamping means, whereby the tension of the fuel cell stack is easily adjustable. Likewise, the adjustment of the fuel cell stack or the setting of the clamping of the fuel cell stack can take place via a plurality of openings. Thus, the setting of the tension and thus the assembly of the fuel cell stack in the hot box can be greatly simplified due to the design, resulting in a relatively inexpensive solution.
Das erfindungsgemäße Gehäuse kann in vorteilhafter Weise derart weitergebildet werden, dass die Spannmittel einen Spannkörper umfassen, der in die Öffnung zum Verspannen des Brennstoffzellenstapels eingesetzt ist. Beispielsweise kön- nen an dem Gehäuseabschnitt ein oder mehrere zylindrische Öffnungen vorgesehen sein, in die insbesondere Zylinder eingelassen beziehungsweise eingesetzt werden können. Die Zylinder können beispielsweise durch eine Andruckplatte ge- gen den entsprechenden Brennstoffzellenstack verspannt werden.The housing according to the invention can be developed in an advantageous manner such that the clamping means comprise a clamping body which is inserted into the opening for bracing the fuel cell stack. For example, NEN on the housing portion may be provided one or more cylindrical openings, in particular cylinder can be inserted or used. The cylinders can be braced for example by a pressure plate against the corresponding fuel cell stack.
Weiterhin kann das erfindungsgemäße Gehäuse so verwirklicht werden, dass der Spannkörper über eine Kraft zumindest ei- nes elastischen Elements gegen den Brennstoffzellenstapel spannbar ist. Dadurch kann eine dauerhafte Verspannung des Brennstoffzellenstacks auch unter Berücksichtigung des Schwindungsverhaltens von Hochtemperaturisolationen erreicht werden. Darüber hinaus lässt sich durch geeignete Wahl beziehungsweise Auslegung sowie Platzierung des elastischen Elements die Verspannung des Brennstoffzellensta- pels genau dosieren. Im dem Fall, bei dem das Gehäuse mehrere Brennstoffzellenstapel aufnimmt, können über die Vielzahl der verwendeten elastischen Elemente die Verspannkräf- te der jeweiligen Brennstoffzellenstacks individuell eingestellt werden.Furthermore, the housing according to the invention can be realized such that the clamping body can be tensioned against the fuel cell stack via a force of at least one elastic element. As a result, a permanent clamping of the fuel cell stack can also be achieved taking into account the shrinkage behavior of high-temperature insulation. In addition, the tension of the fuel cell stack can be accurately metered by suitable choice or design and placement of the elastic element. In the case in which the housing accommodates a plurality of fuel cell stacks, the clamping forces of the respective fuel cell stacks can be adjusted individually via the multiplicity of elastic elements used.
In diesem Zusammenhang kann das erfindungsgemäße Gehäuse vorzugsweise derart ausgebildet werden, dass die Kraft des außenseitig an dem Gehäuseabschnitt angebrachten zumindest einen elastischen Elements über ein Druckelement auf den Spannkörper aufbringbar ist . So kann das Druckelement den Brennstoffzellenstapel beispielsweise gegen den Gehäuseabschnitt aufgrund der durch das elastische Element bewirkten Kraft verspannen.In this context, the housing according to the invention may preferably be formed such that the force of the externally attached to the housing portion at least one elastic element via a pressure element on the clamping body can be applied. Thus, the pressure element can clamp the fuel cell stack, for example against the housing portion due to the force caused by the elastic element.
Ferner kann das erfindungsgemäße Gehäuse so realisiert werden, dass der Spannkörper ein Keramikzylinder ist. Darüber hinaus kann das erfindungsgemäße Gehäuse dergestalt sein, dass das elastische Element zumindest eine Feder um- fasst. Ebenso können zur Bereitstellung einer gleichmäßigen Verspannung Tellerscheiben von Verschraubungen zum Einsatz kommen.Furthermore, the housing according to the invention can be realized so that the clamping body is a ceramic cylinder. In addition, the housing according to the invention may be such that the elastic element comprises at least one spring. Similarly, to provide a uniform strain cup washers are used by screwing.
Weiterhin kann das erfindungsgemäße Gehäuse so weitergebildet werden, dass das Druckelement eine Andruckplatte oder ein Spannrahmen ist. Die Andruckplatte wird beispielsweise außen an einer Metallhülle des Gehäuseabschnitts, beispielsweise an Gehäuseteilen der Hotbox beweglich verschraubt und mittels elastischen Elementen gegen Keramikzylinder vorgespannt, so dass diese wiederum den Brennstoff- zellenstapel verspannen. Alternativ ist ebenso die Verspannung mittels des Spannrahmens möglich, der beispielsweise zumindest teilweise die Hotbox umgreifend an der Außenseite der Gehäuseteile vorgesehen ist.Furthermore, the housing according to the invention can be developed so that the pressure element is a pressure plate or a clamping frame. The pressure plate, for example, externally screwed to a metal shell of the housing section, for example, to housing parts of the Hotbox and biased by elastic elements against ceramic cylinder, so that they in turn clamp the fuel cell stack. Alternatively, the clamping by means of the clamping frame is also possible, which is provided, for example, at least partially enclosing the hot box on the outside of the housing parts.
In diesem Zusammenhang wird es für vorteilhaft erachtet, das erfindungsgemäße Gehäuse so vorzusehen, dass über die Andruckplatte mehrere Spannkörper gegen den Brennstoffzellenstapel spannbar sind. Die Spannkörper können beispielsweise gleichmäßig auf eine Brennstoffzellenstapelstirnflä- che vorgespannt werden. Dadurch kann eine gleichmäßige Verspannung des Brennstoffzellenstapels durch die gleichmäßige Verteilung der Spannkörper erzielt werden.In this context, it is considered advantageous to provide the housing according to the invention so that a plurality of clamping bodies can be tensioned against the fuel cell stack via the pressure plate. For example, the clamping bodies can be uniformly biased onto a fuel cell stacked end face. As a result, a uniform strain of the fuel cell stack can be achieved by the uniform distribution of the clamping body.
Ferner kann das erfindungsgemäße Gehäuse derart verwirk- licht werden, dass der Gehäuseabschnitt aus hochtemperaturbeständigem Isolationsmaterial ausgebildet wird. Insbesondere die Hotbox besteht aus hochtemperaturbeständigem Isolationsmaterial . Vorzugsweise kann das erfindungsgemäße Gehäuse so ausgebildet werden, dass der Gehäuseabschnitt von einer Metallum- mantelung umgeben ist. Das für die Hotbox verwendet Isola- tionsmaterial kann durch eine Metallummantelung gefasst und geschützt werden.Furthermore, the housing according to the invention can be realized in such a way that the housing section is formed from high-temperature-resistant insulating material. In particular, the hotbox consists of high temperature resistant insulation material. Preferably, the housing according to the invention can be formed so that the housing portion is surrounded by a metal sheath. The insulation material used for the Hotbox can be captured and protected by a metal sheath.
Weiterhin wird das erfindungsgemäße Gehäuse in vorteilhafter Weise derart weitergebildet, dass der Brennstoffzellen- Stapel durch die Spannmittel in dessen Stapelrichtung gegen den Gehäuseabschnitt verspannbar ist.Furthermore, the housing according to the invention is developed in an advantageous manner such that the fuel cell stack can be clamped by the clamping means in the stacking direction against the housing portion.
Die Erfindung betrifft ebenso ein System mit dem erfindungsgemäßen Gehäuse und zumindest einem darin aufgenomme- nen Brennstoffzellenstapel .The invention also relates to a system with the housing according to the invention and at least one fuel cell stack accommodated therein.
Eine bevorzugte Ausführungsform der Erfindung wird nachfolgend mit Bezug auf die begleitenden Zeichnungen beispielhaft erläutert.A preferred embodiment of the invention will now be described by way of example with reference to the accompanying drawings.
Es zeigen:Show it:
Figur 1 eine isometrische Darstellung des erfindungsgemäßen Gehäuses; undFigure 1 is an isometric view of the housing according to the invention; and
Figur 2 eine Schnittdarstellung des erfindungsgemäßen Gehäuses von Figur 1.FIG. 2 shows a sectional view of the housing according to the invention from FIG. 1.
Die Figuren 1 und 2 zeigen ein erfindungsgemäßes Gehäuse 10 jeweils in einer isometrischen Darstellung sowie in einerFigures 1 and 2 show a housing 10 according to the invention in an isometric view and in a
Schnittdarstellung. Das erfindungsgemäße Gehäuse 10 wird in diesem Ausführungsbeispiel durch eine Hotbox ausgebildet und umfasst ein einen Gehäuseabschnitt bildendes Gehäuse- teil 14, das einen Brennstoffzellenstapel beziehungsweise Brennstoffzellenstack 24 zumindest teilweise umgibt. Das Gehäuseteil 14 ist mit einem weiteren Gehäuseteil 12 derart gekoppelt, dass der Brennstoffzellenstapel 24 vollständig von den Gehäuseteilen 14, 12 eingeschlossen wird. Die Kopplung beziehungsweise der Gehäuseteileverschluss 18 beider Gehäuseteile 12, 14 ist auf eine dem Fachmann bekannte Weise realisiert und kann beliebig ausgeführt werden, beispielsweise durch einen Rastverschluss, einen Federklapp- Spanner, einen Klippverschluss etc. Der Brennstoffzellenstapel 24 ist im dargestellten Fall so in dem Gehäuseteil 14 angeordnet, dass er mit einer Bodenfläche an einer unteren Gehäusewand des Gehäuseteils 14 und mit einer Seitenfläche an eine Gehäuseseitenwand des Gehäuseteils 14 in Be- rührung steht. Die Stapelrichtung des Brennstoffzellensta- pels 24 entspricht der Vertikalrichtung von Figur 2. An einer der unteren Gehäusewand gegenüberliegenden oberen Gehäusewand des Gehäuseteils 14, oberhalb des Brennstoffzel- lenstapels 24 sind drei zylindrische Öffnungen 30 vorgese- hen (lediglich eine ist in Figur 2 gezeigt) , über dieSectional view. The housing 10 according to the invention is formed in this embodiment by a hot box and comprises a housing section forming a housing section. Part 14, which surrounds a fuel cell stack or fuel cell stack 24 at least partially. The housing part 14 is coupled to a further housing part 12 in such a way that the fuel cell stack 24 is completely enclosed by the housing parts 14, 12. The coupling or the housing part closure 18 of both housing parts 12, 14 is realized in a manner known to those skilled and can be performed arbitrarily, for example by a snap fastener, a Fedklapp- tensioner, a Klippverschluss etc. The fuel cell stack 24 is in the illustrated case in the housing part 14 arranged so that it is in contact with a bottom surface on a lower housing wall of the housing part 14 and with a side surface to a housing side wall of the housing part 14 in touch. The stacking direction of the fuel cell stack 24 corresponds to the vertical direction of FIG. 2. Three cylindrical openings 30 are provided on an upper housing wall of the housing part 14 opposite the lower housing wall, above the fuel cell stack 24 (only one is shown in FIG. 2), about the
Spannmittel 28 auf den Brennstoffzellenstapel 24 eine entsprechende Verspannung aufbringen können, wie nachstehend ausführlich erläutert wird. Die Spannmittel 28 umfassen jeweils einen in die entsprechende Öffnung 30 eingesetzten Keramikzylinder 26, der aufgrund eines geringfügigen Spiels in der Öffnung 30 bewegbar ist. Der Keramikzylinder 26 steht zum einen mit dem Brennstoffzellenstapel 24 in Berührung und ist durch die Öffnung 30 in der Stapelrichtung des Brennstoffzellenstapels 24 ausgerichtet. Weiterhin steht der Keramikzylinder 26 mit einer Druckplatte 22 der Spannmittel 28 in Berührung. Die Druckplatte 22 ist gehäuseau- ßenseitig an dem Gehäuseteil 14 über zumindest eine Ver- schraubung, die ein elastisches Element 20 umfasst, ange- bracht. Insbesondere wird die Druckplatte 22 durch die Ver- schraubung bewegbar geführt, während sie gleichzeitig durch das an der Verschraubung vorgesehene elastische Element 20 in der Form einer Feder gegen die entsprechenden Keramikzy- linder 26 vorgespannt wird. Die Vorspannung kann beispielsweise durch eine zwischen einem Schraubenkopf und der Druckplatte 22 angeordneten und entsprechend ausgelegten Feder umgesetzt werden. Durch die auf die entsprechenden Keramikzylinder 26 aufgebrachte Verspannung wird letztend- lieh die Verspannung des entsprechenden Brennstoffzellen- stapels 24 bewirkt. Darüber hinaus lässt sich die Verspannung durch Festziehen oder Lösen der Verschraubung genau dosieren beziehungsweise einstellen. Weiterhin sind in den miteinander gekoppelten Gehäuseteilen 12, 14 weitere Kotnpo- nenten 16 eines Brennstoffzellensystems zumindest teilweise aufgenommen, welche im dargestellten Fall durch Rohrleitungen 16 ausgebildet werden. Diese Rohrleitungen 16 können beispielsweise von einem Reformer oder Nachbrenner des Brennstoffzellensystems stammen. Zur Aufnahme dieser Rohr- leitungen 16 sind die Gehäuseteile 12, 14 jeweils mit einem Rohrdurchmesser der Rohrleitungen 16 angepassten Aussparungen ausgestattet, so dass die Rohrleitungen 16 das Gehäuse 10 benachbart zu dem Brennstoffzellenstapel 24 durchlaufen können.Clamping means 28 can apply a corresponding strain on the fuel cell stack 24, as will be explained in detail below. The clamping means 28 each comprise a ceramic cylinder 26 inserted into the corresponding opening 30, which is movable in the opening 30 due to a slight play. The ceramic cylinder 26 is in contact with the fuel cell stack 24 and is aligned through the opening 30 in the stacking direction of the fuel cell stack 24. Furthermore, the ceramic cylinder 26 is in contact with a pressure plate 22 of the tensioning means 28. The pressure plate 22 is exteriorly connected to the housing part 14 via at least one screw connection, which comprises an elastic element 20. introduced. In particular, the pressure plate 22 is movably guided by the screw connection while at the same time being biased against the corresponding ceramic cylinder 26 by the elastic element 20 provided in the form of a spring on the screw connection. The bias voltage can be implemented, for example, by a spring arranged between a screw head and the pressure plate 22 and correspondingly designed. The tension applied to the corresponding ceramic cylinders 26 ultimately causes the tensioning of the corresponding fuel cell stack 24. In addition, the tension can be precisely adjusted or adjusted by tightening or loosening the screw connection. Furthermore, in the mutually coupled housing parts 12, 14 further Kotnpo- nenten 16 of a fuel cell system at least partially received, which are formed in the illustrated case by pipes 16. These pipelines 16 can originate, for example, from a reformer or afterburner of the fuel cell system. For receiving these pipes 16, the housing parts 12, 14 each equipped with a pipe diameter of the pipes 16 adapted recesses, so that the pipes 16 can pass through the housing 10 adjacent to the fuel cell stack 24.
Im Falle von mehreren von den Gehäuseteilen 12, 14 aufgenommenen Brennstoffzellenstapeln 24 sind mehrere Spannmittel 28 zur jeweiligen Verspannung des entsprechenden Brennstoffzellenstapels vorgesehen. Ebenso ist denkbar, dass mehrere Brennstoffzellenstapel 24 über Keramikzylinder 26 verspannt werden, die lediglich von einer entsprechend dimensionierten, d.h. größeren, Andruckplatte 22 gegen die Brennstoffzellenstapel 24 vorgespannt werden. Die in der vorstehenden Beschreibung, in den Zeichnungen sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in Kombination für die Ver- wirklichung der Erfindung wesentlich sein. In the case of a plurality of fuel cell stacks 24 accommodated by the housing parts 12, 14, a plurality of tensioning means 28 are provided for the respective tensioning of the corresponding fuel cell stack. It is also conceivable that a plurality of fuel cell stacks 24 are clamped by ceramic cylinders 26, which are biased only by a correspondingly sized, ie larger, pressure plate 22 against the fuel cell stack 24. The features of the invention disclosed in the foregoing description, in the drawings and in the claims may be essential both individually and in combination for the realization of the invention.
Bezugszeichenliste :List of reference numbers:
10 Gehäuse10 housing
12 Gehäuseteil 14 Gehäuseteil12 housing part 14 housing part
16 Komponenten des Brennstoffzellensystems16 components of the fuel cell system
18 Gehäuseteileverschluss18 housing part lock
20 elastisches Element20 elastic element
22 Druckelement 24 Brennstoffzellenstapel22 pressure element 24 fuel cell stack
26 Spannkörper26 clamping body
28 Spannmittel28 clamping devices
30 Gehäuseöffnung 30 housing opening

Claims

ANSPRÜCHE
1. Gehäuse (10) zum Aufnehmen zumindest eines Brennstoff- zellenstapels (24) mit einem Gehäuseabschnitt (14) , der derart ausgebildet ist, dass er den Brennstoffzellenstapel (24) zumindest teilweise aufnehmen kann, dadurch gekennzeichnet, dass Spannmittel (28) vorgesehen sind, durch die der Brennstoffzellenstapel (24) über zumindest eine Öffnung (30) des Gehäuseabschnitts (14) verspannbar ist.1. housing (10) for receiving at least one fuel cell stack (24) having a housing portion (14) which is designed such that it can at least partially receive the fuel cell stack (24), characterized in that clamping means (28) are provided , by which the fuel cell stack (24) can be braced via at least one opening (30) of the housing section (14).
2. Gehäuse (10) nach Anspruch 1, dadurch gekennzeichnet, dass die Spannmittel (28) einen Spannkörper (26) umfassen, der in die Öffnung (30) zum Verspannen des Brennstoffzellenstapels (24) eingesetzt ist.Second housing (10) according to claim 1, characterized in that the clamping means (28) comprise a clamping body (26) which is inserted into the opening (30) for bracing the fuel cell stack (24).
3. Gehäuse (10) nach Anspruch 2, dadurch gekennzeichnet, dass der Spannkörper (26) über eine Kraft zumindest eines elastischen Elements (20) gegen den Brennstoffzellenstapel (24) spannbar ist.3. Housing (10) according to claim 2, characterized in that the clamping body (26) via a force of at least one elastic element (20) against the fuel cell stack (24) can be tensioned.
4. Gehäuse (10) nach Anspruch 3, dadurch gekennzeichnet, dass die Kraft des außenseitig an dem Gehäuseabschnitt (14) angebrachten zumindest einen elastischen Elements (20) über ein Druckelement (22) auf den Spannkörper (26) aufbringbar ist.4. Housing (10) according to claim 3, characterized in that the force of the outside of the housing portion (14) mounted at least one elastic element (20) via a pressure element (22) on the clamping body (26) can be applied.
5. Gehäuse (10) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Spannkörper (26) ein Keramikzylinder (26) ist. 5. housing (10) according to one of claims 2 to 4, characterized in that the clamping body (26) is a ceramic cylinder (26).
6. Gehäuse (10) nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass das elastische Element (20) zumindest eine Feder umfasst.6. housing (10) according to one of claims 3 to 5, characterized in that the elastic element (20) comprises at least one spring.
7. Gehäuse (10) nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Druckelement (22) eine Andruck- platte oder ein Spannrahmen ist.7. housing (10) according to one of claims 4 to 6, characterized in that the pressure element (22) is a pressure plate or a clamping frame.
8. Gehäuse (10) nach Anspruch 7, dadurch gekennzeichnet, dass über die Andruckplatte mehrere Spannkörper (26) gegen den Brennstoffzellenstapel (24) spannbar sind.8. housing (10) according to claim 7, characterized in that on the pressure plate a plurality of clamping body (26) against the fuel cell stack (24) can be tensioned.
9. Gehäuse (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Gehäuseabschnitt (14) aus hochtemperaturbeständigem Isolationsmaterial ausgebildet wird.9. housing (10) according to any one of the preceding claims, characterized in that the housing portion (14) is formed of high temperature resistant insulating material.
10. Gehäuse (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Gehäuseabschnitt (14) von einer Metallummantelung umgeben ist.10. Housing (10) according to any one of the preceding claims, characterized in that the housing portion (14) is surrounded by a metal jacket.
11. Gehäuse (10) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Brennstoffzellenstapel (24) durch die Spannmittel (28) in dessen Stapelrichtung gegen den Gehäuseabschnitt (14) verspannbar ist.11. Housing (10) according to any one of the preceding claims, characterized in that the fuel cell stack (24) by the clamping means (28) in the stacking direction against the housing portion (14) is clamped.
12. System mit einem Gehäuse (10) nach einem der Ansprüche 1 bis 10 und zumindest einem darin aufgenommenen Brennstoffzellenstapel (24) . 12. System comprising a housing (10) according to any one of claims 1 to 10 and at least one fuel cell stack (24) received therein.
EP07846278A 2006-12-21 2007-10-29 Housing for receiving and tensioning at least one fuel cell stack Withdrawn EP2102934A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060810.0A DE102006060810B4 (en) 2006-12-21 2006-12-21 Housing for receiving and clamping at least one fuel cell stack and fuel cell system
PCT/DE2007/001943 WO2008074280A1 (en) 2006-12-21 2007-10-29 Housing for receiving and tensioning at least one fuel cell stack

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US (1) US20100068597A1 (en)
EP (1) EP2102934A1 (en)
JP (1) JP5377323B2 (en)
CN (1) CN101601160A (en)
AU (1) AU2007335035A1 (en)
CA (1) CA2671018A1 (en)
DE (1) DE102006060810B4 (en)
EA (1) EA200970474A1 (en)
WO (1) WO2008074280A1 (en)

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DE102012024963B4 (en) * 2012-12-20 2023-03-16 Cellcentric Gmbh & Co. Kg Fuel cell arrangement with a closed housing
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US20100068597A1 (en) 2010-03-18
CN101601160A (en) 2009-12-09
EA200970474A1 (en) 2009-10-30
JP5377323B2 (en) 2013-12-25
CA2671018A1 (en) 2008-06-26
WO2008074280A1 (en) 2008-06-26
AU2007335035A1 (en) 2008-06-26
DE102006060810B4 (en) 2015-01-15
JP2010512625A (en) 2010-04-22
DE102006060810A1 (en) 2008-06-26

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