WO2011154576A1 - Fuel cell comprising bipolar panels with corrugated metal sheet - Google Patents
Fuel cell comprising bipolar panels with corrugated metal sheet Download PDFInfo
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- WO2011154576A1 WO2011154576A1 PCT/ES2011/070399 ES2011070399W WO2011154576A1 WO 2011154576 A1 WO2011154576 A1 WO 2011154576A1 ES 2011070399 W ES2011070399 W ES 2011070399W WO 2011154576 A1 WO2011154576 A1 WO 2011154576A1
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- fuel cell
- bipolar
- plates
- corrugated
- bipolar plates
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
- H01M8/0254—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form corrugated or undulated
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
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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
- H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
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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
Abstract
The essential feature of the fuel cell is that the bipolar plates (4, 7) are made up of thin metal sheets that are corrugated to form channels for distributing fluids over the electrodes (6).
Description
PILA DE COMBUSTIBLE DE PLACAS BIPOLARES CON LÁMINA FUEL BATTERY OF BIPOLAR PLATES WITH SHEET
METÁLICA CORRUGADA CORRUGATED METAL
D E S C R I P C I Ó N D E S C R I P C I Ó N
OBJETO DE LA INVENCIÓN OBJECT OF THE INVENTION
La presente invención forma parte del área de la energía y en particular en la generación eléctrica mediante pilas de combustible. The present invention is part of the area of energy and in particular in the electric generation by means of fuel cells.
El objeto de la invención consiste en una pila de combustible que utiliza una lámina metálica corrugada, con superficie resistente a la corrosión, para la formación de sus placas bipolares. De esta forma se proporcionan unas buenas propiedades de conducción y garantiza un excelente contacto eléctrico, así como la correcta distribución de los gases, además de emplear un componente muy ligero de fácil fabricación y bajo coste. The object of the invention consists of a fuel cell that uses a corrugated metal sheet, with a corrosion resistant surface, for the formation of its bipolar plates. In this way, good conduction properties are provided and guarantees excellent electrical contact, as well as the correct distribution of the gases, in addition to using a very light component of easy manufacturing and low cost.
ANTECEDENTES DE LA INVENCIÓN Las pilas de combustible son dispositivos electro-químicos que convierten la energía química de un combustible en energía eléctrica. En la actualidad hay muchos tipos de pilas de combustible diseñadas para distintos tipos de aplicaciones, desde automóviles a la producción de energía para viviendas, o para alimentación de dispositivos portátiles. BACKGROUND OF THE INVENTION Fuel cells are electrochemical devices that convert the chemical energy of a fuel into electrical energy. There are currently many types of fuel cells designed for different types of applications, from cars to home energy production, or for powering portable devices.
Las pilas de combustible pueden ser de diversos tipos, de óxidos sólidos, acido fosfórico, carbonatos fundidos, etc. La presente propuesta se centra en aquellas pilas basadas en un electrolito sólido formado por una membrana de intercambio protónico. Estas están constituidas por capas alternativamente densas y permeables a los gases, así como sucesivamente de conducción electrónica y protónica. Una celda básica de estas pilas se compone usualmente de siete capas, que desde el exterior hacia el interior
son: dos placas bipolares para distribución de gases, dos de láminas de difusión, dos de depósito catalítico y la membrana que hace las veces de electrolito entre ellas. El electrolito, denso al paso de gases, ha de permitir el transporte protónico y se sitúa entre ánodo y cátodo, formados cada uno de ellos por una capa catalítica y otra difusora. Esta última establece contacto eléctrico con la placa bipolar correspondiente, que presenta transporte electrónico y ha de permitir el acceso de los gases. Las celdas así constituidas se ensamblan entre sí en conexión serie, de forma que el ánodo de cada celda queda eléctricamente unido al cátodo de la siguiente, formando así la estructura característica de una pila de combustible. The fuel cells can be of various types, of solid oxides, phosphoric acid, molten carbonates, etc. This proposal focuses on those batteries based on a solid electrolyte formed by a proton exchange membrane. These consist of alternately dense and gas permeable layers, as well as successively electronic and protonic conduction. A basic cell of these batteries is usually composed of seven layers, which from the outside to the inside they are: two bipolar plates for distribution of gases, two of diffusion plates, two of catalytic deposit and the membrane that acts as electrolyte between them. The electrolyte, dense to the passage of gases, must allow proton transport and is located between anode and cathode, each formed by a catalytic layer and a diffuser. The latter establishes electrical contact with the corresponding bipolar plate, which has electronic transport and must allow gas access. The cells thus constituted are assembled together in series connection, so that the anode of each cell is electrically connected to the cathode of the next, thus forming the characteristic structure of a fuel cell.
Entre los problemas que presentan los dispositivos actuales como generadores eléctricos se pueden citar: su elevado coste, la complejidad de los procesos de mecanizado o sinterizado en grafito o metal de sus componentes, la necesidad de una elevada precisión en la conformación de las placas bipolares para el correcto contacto eléctrico y evitar las fugas en el sellado, la elevada resistencia eléctrica de algunos materiales conductores usados en las placas bipolares, la obstrucción de una parte importante de la superficie activa del electrodo por los contactos eléctricos, entre las costillas de las placas bipolares y los electrodos, que dificultan el acceso de gas a los puntos de catálisis, el peso excesivo de los componentes pasivos de la pila (bipolares, prensa de cerramiento, dispositivos de alimentación, conexión, refrigeración y soporte, etc.). Among the problems presented by current devices such as electric generators can be mentioned: their high cost, the complexity of the machining or sintering processes in graphite or metal of their components, the need for high precision in the conformation of bipolar plates for the correct electrical contact and prevent leakage in the sealing, the high electrical resistance of some conductive materials used in the bipolar plates, the obstruction of an important part of the active surface of the electrode by the electrical contacts, between the ribs of the bipolar plates and the electrodes, which hinder the access of gas to the catalysis points, the excessive weight of the passive components of the battery (bipolar, closing press, feeding devices, connection, cooling and support, etc.).
En el documento US4751 153 se aprecia un sistema de sellado que incorpora un elemento de ranura en la estructura y una junta sólida pre- conformada. In US4751 153 a sealing system is appreciated that incorporates a groove element in the structure and a preformed solid joint.
Por otro lado, en el documento US33940032 se aprecia una particular forma y disposición de las placas corrugadas, con transporte de los gases de
forma perpendicular entre ánodo y cátodo, y la corriente eléctrica normal al plano que forman las direcciones de transporte de los gases. On the other hand, document US33940032 shows a particular shape and arrangement of the corrugated plates, with transport of the gases of perpendicular form between anode and cathode, and the normal electric current to the plane formed by the directions of transport of gases.
En relación con el documento US6905793 se observa el uso de placas corrugadas perpendiculares y el diseño planar de la pila, y su utilización está centrada en la refrigeración. In relation to document US6905793, the use of perpendicular corrugated plates and the planar design of the stack is observed, and its use is focused on cooling.
En el documento US6670068, se muestra un método para ensamblar pilas de placas bipolares corrugadas y evitar fugas al exterior. In US6670068, a method is shown for assembling piles of corrugated bipolar plates and preventing leakage to the outside.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La presente invención consiste en una pila de combustible con electrolito de membrana de intercambio protónico que incorpora placas bipolares de lámina metálica corrugada y estructura externa sellante de material denso a los gases, lo que representa una notable mejora en lo referente al coste, peso, eficiencia y facilidad de creación de dichas pilas tanto en el proceso de ensamblado como en el de fabricación de sus componentes. The present invention consists of a fuel cell with proton exchange membrane electrolyte that incorporates bipolar plates of corrugated metal sheet and external sealing structure of dense material to gases, which represents a notable improvement in terms of cost, weight, efficiency and ease of creation of said batteries both in the assembly process and in the manufacturing of its components.
Esta pila de combustible está caracterizada por la utilización como placa bipolar de una lámina delgada y elástica de metal corrugado resistente a la corrosión, circundada por un material sellante denso a los gases. This fuel cell is characterized by the use as a bipolar plate of a thin and elastic sheet of corrosion-resistant corrugated metal, surrounded by a gas-tight sealing material.
La pila incorpora como elementos fundamentales: The battery incorporates as fundamental elements:
- estructura, - structure,
- ensamblaje membrana-electrodo - membrane-electrode assembly
- placa corrugada - corrugated plate
- placa de conexión - connection plate
- sellado
Estructura - sealed Structure
La estructura consiste en un marco sellante externo de la pila de un material ligero e impermeable a gases, con las propiedades mecánicas adecuadas (por ejemplo, un material compuesto de fibra de vidrio/poliéster). Este marco es de un grosor algo menor que la suma del grueso de la capa difusora más el de la placa corrugada, con el fin de garantizar el correcto contacto eléctrico al aplicar posteriormente presión, debido a la flexión de la lámina metálica corrugada. The structure consists of an external sealing frame of the stack of a light and gas-impermeable material, with suitable mechanical properties (for example, a fiberglass / polyester composite material). This frame is of a somewhat smaller thickness than the sum of the thickness of the diffuser layer plus that of the corrugated plate, in order to guarantee the correct electrical contact when subsequently applying pressure, due to the bending of the corrugated metal sheet.
Ensamblaje membrana-electrodo Membrane-electrode assembly
El ensamblaje membrana-electrodo utilizado en la pila es de cinco capas: dos capas difusoras, dos capas catalíticas y una membrana. Las dimensiones de las superficies difusoras coinciden con las de la lámina metálica corrugada situada en el interior del marco. The membrane-electrode assembly used in the cell is five layers: two diffuser layers, two catalytic layers and one membrane. The dimensions of the diffuser surfaces coincide with those of the corrugated metal sheet located inside the frame.
Placa corrugada La placa corrugada es una lámina metálica delgada corrugada flexible y de superficie resistente a la corrosión, situada dentro del marco, que constituye una placa bipolar de canales paralelos, alimentados desde un conducto de transporte de gases por las cavidades de distribución y cuya forma garantiza una distribución homogénea de los gases entre los diferentes canales. La elasticidad del material metálico que constituye la placa bipolar asegura un contacto eléctrico adecuado entre la capa difusora y la lámina conductora que separa cada celda de la contigua o constituye el contacto terminal de la pila. Placa de conexión Corrugated plate The corrugated plate is a thin flexible corrugated metal sheet with a corrosion-resistant surface, located within the frame, which constitutes a bipolar plate with parallel channels, fed from a gas transport conduit through the distribution cavities and whose shape guarantees a homogeneous distribution of gases between the different channels. The elasticity of the metallic material that constitutes the bipolar plate ensures an adequate electrical contact between the diffuser layer and the conductive sheet that separates each cell from the adjacent one or constitutes the terminal contact of the battery. Connection plate
El diseño de pila de combustible se caracteriza asimismo porque la
unión entre celdas consecutivas se realiza mediante una lámina plana y delgada de conducción electrónica que está en contacto con la placa de metal corrugado. Dichas placas cierran por ambos lados cada monocelda, posibilitando la conducción de los electrones del ánodo de una celda al cátodo de la siguiente, o al exterior de la pila. The fuel cell design is also characterized in that the Joint between consecutive cells is done by a thin, flat sheet of electronic conduction that is in contact with the corrugated metal plate. Said plates close each monocell on both sides, making it possible to conduct electrons from the anode of one cell to the cathode of the next, or to the outside of the battery.
Sellado Sealed
Considerando los materiales que conforman el electrolito, el marco, y la lámina de separación, es preciso garantizar la estanqueidad de sus uniones, bien mediante la elasticidad de los propios materiales o bien introduciendo una capa sellante entre ellos. Considering the materials that make up the electrolyte, the frame, and the separation sheet, it is necessary to guarantee the tightness of their joints, either by elasticity of the materials themselves or by introducing a sealing layer between them.
Hay que destacar que, a diferencia del documento US4751 153, la presente invención no utiliza una junta sólida preconformada sino un material sellante fluido de alta adhesividad, por ejemplo, un epoxi de dos componentes líquidos viscosos que solidifican al secar, aplicado éste tanto en la parte interna como en la externa de nuestra pila. Por otro lado, a diferencia del documento US6670068, en la presente invención las fugas son evitadas mediante la utilización del epoxi sobre la estructura aislante rígida, mientras que en dicho documento se ataca el problema sellando la propia placa corrugada. Por otra parte, a diferencia del documento US6261710, la presente invención aporta una estructura formada por una lámina metálica sobre la que establecen contacto las láminas corrugadas de las celdas adyacentes, para la separación de monoceldas, que permite transporte electrónico y el transporte independiente de gases a uno y otro lado.
DESCRIPCIÓN DE LOS DIBUJOS It should be noted that, unlike US4751 153, the present invention does not use a pre-formed solid joint but a high adhesive fluid sealing material, for example, an epoxy of two viscous liquid components that solidify on drying, applied both in the internal as well as the external part of our battery. On the other hand, unlike document US6670068, in the present invention leaks are avoided by using the epoxy on the rigid insulating structure, while in said document the problem is attacked by sealing the corrugated plate itself. On the other hand, unlike document US6261710, the present invention provides a structure formed by a metal sheet on which the corrugated sheets of adjacent cells make contact, for the separation of monocells, which allows electronic transport and the independent transport of gases on either side. DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de la invención, de acuerdo con dos ejemplos preferentes de realización práctica de la misma, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente: Figura 1 .- Muestra una vista de las partes que componen el primer ejemplo preferente en una monocelda de combustible con placas bipolares de lámina corrugada objeto de invención. To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to two preferred examples of practical implementation thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented: Figure 1 .- Shows a view of the parts that make up the first preferred example in a fuel cell with corrugated sheet bipolar plates object of the invention.
Figura 2.- Muestra una vista translúcida de las diferentes piezas que constituyen una de las celdas de la pila, donde se observan orificios para circulación de los gases de alimentación y para los pernos de fijación del conjunto. Figure 2.- It shows a translucent view of the different parts that constitute one of the cells of the cell, where holes are observed for the circulation of the feed gases and for the fixing bolts of the assembly.
Figura 3.- Muestra una vista del despiece de una celda componente de la pila correspondiente a un segundo ejemplo. Figure 3.- Shows an exploded view of a cell component of the stack corresponding to a second example.
Figura 4.- Muestra una vista completa de los componentes que conforman la pila de dos celdas de acuerdo con el segundo ejemplo de aplicación. Figure 4.- Shows a complete view of the components that make up the two cell stack according to the second application example.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
En la figura 1 se muestra el primer ejemplo de una pila de una sola celda construida con las placas bipolares (4,7) de lámina metálica corrugada según la invención, que se encuentran en contacto con unos electrodos (6) de un ensamblaje membrana-electrodo (5) estableciendo contacto eléctrico entre los electrodos y unas placas terminales (2, 9), a la vez que canalizan el flujo de
los fluidos reactantes, así como se aprecia un marco (3, 8) formado por una primer separadora (3) y un segundo separador (8). Figure 1 shows the first example of a single cell cell constructed with the bipolar plates (4,7) of corrugated metal sheet according to the invention, which are in contact with electrodes (6) of a membrane assembly. electrode (5) establishing electrical contact between the electrodes and end plates (2, 9), while channeling the flow of reactant fluids, as well as a frame (3, 8) formed by a first separator (3) and a second separator (8).
Los flujos son cruzados, ya que cada una de las placas bipolares (4, 7) dispone de canales de distribución paralelos y los canales de una placa bipolar (4) son perpendiculares a los canales de la otra placa bipolar (7). La elasticidad de las placas bipolares (4, 7) corrugadas permite que estén ligeramente comprimidas en el montaje, garantizando un buen contacto eléctrico entre los electrodos (6) y las placas terminales (2, 9). The flows are crossed, since each of the bipolar plates (4, 7) has parallel distribution channels and the channels of a bipolar plate (4) are perpendicular to the channels of the other bipolar plate (7). The elasticity of the corrugated bipolar plates (4, 7) allows them to be slightly compressed in the assembly, guaranteeing a good electrical contact between the electrodes (6) and the terminal plates (2, 9).
De acuerdo con la figura 4 se observa que la pila está constituida por dos celdas conectadas eléctricamente en serie mediante una lámina conductora (10), de forma que el cátodo de una celda queda al potencial del ánodo de la otra. En esta configuración la tensión entre bornes de la pila es igual a la suma de las tensiones de cada una de sus celdas, mientras que la intensidad eléctrica es común a todas ellas. According to Figure 4, it can be seen that the cell is constituted by two electrically connected cells in series by means of a conductive sheet (10), so that the cathode of one cell is at the potential of the anode of the other. In this configuration, the voltage between the terminals of the battery is equal to the sum of the voltages of each of its cells, while the electrical intensity is common to all of them.
En la figura 2 se observa un orificio de entrada (30) definido en la placa terminal (2) a través del cual penetra el fluido combustible, hacia el ánodo, que se distribuye primeramente por un conducto de alimentación y luego por un espacio esencialmente triangular del primer separador (3) hasta alcanzar los canales de la placa bipolar (4) corrugada, manteniendo la sección normal al flujo y la velocidad casi constantes hasta alcanzar un orificio de salida (31 ) definido en esa misma placa terminal (2). In Figure 2 an inlet hole (30) defined in the end plate (2) is observed through which the combustible fluid penetrates, towards the anode, which is distributed firstly through a feed conduit and then through an essentially triangular space from the first separator (3) until reaching the channels of the corrugated bipolar plate (4), keeping the section normal to the flow and the speed almost constant until reaching an exit orifice (31) defined in that same terminal plate (2).
Una circulación semejante tiene lugar en el cátodo con el fluido comburente, aire u oxígeno, entrando por un orificio de entrada (32) a una cavidad o espacio del otro separador (8) para dirigirse a continuación y recorrer los canales de la placa bipolar (7) y salir por el orificio de salida (33) de la placa terminal inferior (9). A similar circulation takes place in the cathode with the oxidizing fluid, air or oxygen, entering through an inlet hole (32) to a cavity or space of the other separator (8) to go next and travel the channels of the bipolar plate ( 7) and exit through the outlet hole (33) of the lower end plate (9).
La circulación de los gases se realiza por tanto por orificios ubicados en
las esquinas del marco (3, 8), encontrándose en las diagonales opuestas los correspondientes a cada gas: los orificios (30, 31 ) correspondientes al combustible y los orificios (32, 33) correspondientes al oxidante. Así pues el gas accede desde los orificios de entrada hasta los canales de la placa bipolar correspondiente y la salida se produce por un esquema similar en el extremo opuesto. The circulation of gases is therefore carried out through holes located in the corners of the frame (3, 8), with the corresponding diagonals corresponding to each gas: the holes (30, 31) corresponding to the fuel and the holes (32, 33) corresponding to the oxidant. Thus the gas accesses from the inlet holes to the channels of the corresponding bipolar plate and the output is produced by a similar scheme at the opposite end.
El marco (3, 8) y demás piezas, excepto las placas bipolares (4, 7), presentan asimismo unas perforaciones (40) para introducir los tornillos que cierran y mantienen la presión entre los componentes que garantizan la estanqueidad de las cámaras interiores del dispositivo. The frame (3, 8) and other parts, except bipolar plates (4, 7), also have perforations (40) to introduce the screws that close and maintain the pressure between the components that guarantee the tightness of the inner chambers of the device.
La alimentación de ánodo y cátodo en cada celda se realiza en paralelo y los conductos de alimentación conectados a los orificios de entrada (30, 32) y los conductos de salida de fluidos conectados a los orificios de salida (31 , 34) recorren toda la pila entre placas terminales (2, 9), atravesando las celdas. The feeding of anode and cathode in each cell is carried out in parallel and the feeding conduits connected to the inlet holes (30, 32) and the fluid outlets connected to the outlet holes (31, 34) run through the entire stack between end plates (2, 9), going through the cells.
En la figura 3 se observa el segundo ejemplo en el que se emplean dos placas de refuerzo (1 1 ) que refuerzan el ensamblaje membrana-electrodo (5). Estas placas de refuerzo (1 1 ) son de un material delgado y rígido, por ejemplo lámina de acero o de poliéster-fibra de vidrio y evitan la conexión de los fluidos de ánodo y cátodo por deformación de la membrana en la proximidad a los orificios (30-33). Las diferentes celdas de la pila están conectadas eléctricamente entre sí mediante las láminas conductoras (10), que son delgadas, de elevada conductividad e impermeables a los gases, realizadas en acero inoxidable. La pila se ensambla mediante ocho varillas roscadas que atraviesan el perímetro de todas las celdas componentes a través de los orificios (40), realizados al efecto en todas las piezas excepto en las placas bipolares (4, 7) corrugadas interiores al cerramiento.
Figure 3 shows the second example in which two reinforcement plates (1 1) are used that reinforce the membrane-electrode assembly (5). These reinforcing plates (1 1) are of a thin and rigid material, for example steel or polyester-fiberglass sheet and prevent the connection of anode and cathode fluids by deformation of the membrane in the proximity to the holes (30-33). The different cells of the battery are electrically connected to each other by means of the conductive sheets (10), which are thin, of high conductivity and impervious to gases, made of stainless steel. The stack is assembled by means of eight threaded rods that cross the perimeter of all the component cells through the holes (40), made for this purpose in all the parts except in the corrugated bipolar plates (4, 7) inside the enclosure.
Claims
1 . - Pila de combustible (1 ) de placas bipolares, que es del tipo de electrolito sólido de membrana de conducción protónica y que comprende unas placas terminales (2, 9), un marco (3, 8), un ensamblaje membrana-electrodos (5), y unas placas bipolares (4, 7), caracterizada porque las placas bipolares (4,7) están constituidas por láminas metálicas delgadas que son corrugadas para configurar canales de distribución de fluidos sobre los electrodos (6). one . - Fuel cell (1) of bipolar plates, which is of the proton-conducting membrane solid electrolyte type and comprising terminal plates (2, 9), a frame (3, 8), a membrane-electrode assembly (5 ), and bipolar plates (4, 7), characterized in that the bipolar plates (4,7) are constituted by thin metallic sheets that are corrugated to configure fluid distribution channels on the electrodes (6).
2. - Pila de combustible (1 ) de acuerdo con las reivindicación 1 caracterizada porque las láminas metálicas son de metal elástico, de elevada conductividad eléctrica y alta resistencia superficial a la corrosión. 2. - Fuel cell (1) according to claim 1 characterized in that the metal sheets are made of elastic metal, of high electrical conductivity and high surface resistance to corrosion.
3.- Pila de combustible (1 ) de acuerdo con las reivindicaciones 1 o 2 caracterizada porque las láminas elásticas son de elasticidad adecuada para garantizar en compresión el correcto contacto eléctrico entre los electrodos (6) y las celdas contiguas o placas terminales (2, 9). 3. Fuel cell (1) according to claims 1 or 2, characterized in that the elastic sheets are of adequate elasticity to ensure the correct electrical contact between the electrodes (6) and adjacent cells or end plates (2, in compression). 9).
4.- Pila de combustible (1 ) de acuerdo con la reivindicación 3 caracterizada porque comprende un separador de gases (10) que establece el contacto eléctrico con celdas contiguas. 4. Fuel cell (1) according to claim 3 characterized in that it comprises a gas separator (10) that establishes the electrical contact with adjacent cells.
5.- Pila de combustible (1 ), de acuerdo con reivindicación 1 caracterizada porque comprende fluidos sellantes de uno o dos componentes aplicados sobre el marco (3, 8) que actúa como cerramiento. 5. Fuel cell (1), according to claim 1 characterized in that it comprises sealing fluids of one or two components applied on the frame (3, 8) that acts as a closure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ESP201030894 | 2010-06-09 | ||
| ES201030894A ES2377797B1 (en) | 2010-06-09 | 2010-06-09 | FUEL BATTERY OF BIPOLAR PLATES WITH CORRUGATED METAL SHEET. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011154576A1 true WO2011154576A1 (en) | 2011-12-15 |
Family
ID=45097567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2011/070399 WO2011154576A1 (en) | 2010-06-09 | 2011-06-06 | Fuel cell comprising bipolar panels with corrugated metal sheet |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2377797B1 (en) |
| WO (1) | WO2011154576A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014202320A1 (en) * | 2013-06-20 | 2014-12-24 | Cellstrom Gmbh | Laminated bipolar plate |
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|---|---|---|---|---|
| JPH01183070A (en) * | 1988-01-06 | 1989-07-20 | Hitachi Ltd | Separator for fuel cell |
| EP0555432A1 (en) | 1991-07-25 | 1993-08-18 | Centre Nat Rech Scient | Electronic device for converting electrical energy. |
| DE19641143A1 (en) * | 1995-10-05 | 1997-04-17 | Magnet Motor Gmbh | Polymer electrolyte fuel cell |
| WO2004049483A2 (en) * | 2002-11-28 | 2004-06-10 | Global Thermoelectric Inc. | Solid oxide fuel cell stack |
| EP1673849A1 (en) | 2003-10-17 | 2006-06-28 | Abb Research Ltd. | Converter circuit for connecting a plurality of switching voltage levels |
| EP1815586A1 (en) | 2004-11-22 | 2007-08-08 | Abb Research Ltd. | Converter circuit for switching a number of switching voltage levels |
| EP1051799B1 (en) | 1998-01-27 | 2008-07-30 | Abb Ab | A converter device |
| US7585582B2 (en) * | 2006-06-28 | 2009-09-08 | Nan Ya Printed Circuit Board Corporation | Fuel cell module utilizing wave-shaped flow board |
| EP2080262B1 (en) | 2006-10-18 | 2010-03-17 | ABB Research LTD | Converter circuit for switching a large number of switching voltage levels |
| WO2010047586A1 (en) * | 2008-10-20 | 2010-04-29 | Stichting Energieonderzoek Centrum Nederland | Sofc stack with corrugated separator plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI222765B (en) * | 2003-09-02 | 2004-10-21 | Kun-Tsan Jeng | Bipolar plate for fuel cell |
-
2010
- 2010-06-09 ES ES201030894A patent/ES2377797B1/en not_active Expired - Fee Related
-
2011
- 2011-06-06 WO PCT/ES2011/070399 patent/WO2011154576A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01183070A (en) * | 1988-01-06 | 1989-07-20 | Hitachi Ltd | Separator for fuel cell |
| EP0555432A1 (en) | 1991-07-25 | 1993-08-18 | Centre Nat Rech Scient | Electronic device for converting electrical energy. |
| DE19641143A1 (en) * | 1995-10-05 | 1997-04-17 | Magnet Motor Gmbh | Polymer electrolyte fuel cell |
| EP1051799B1 (en) | 1998-01-27 | 2008-07-30 | Abb Ab | A converter device |
| WO2004049483A2 (en) * | 2002-11-28 | 2004-06-10 | Global Thermoelectric Inc. | Solid oxide fuel cell stack |
| EP1673849A1 (en) | 2003-10-17 | 2006-06-28 | Abb Research Ltd. | Converter circuit for connecting a plurality of switching voltage levels |
| EP1815586A1 (en) | 2004-11-22 | 2007-08-08 | Abb Research Ltd. | Converter circuit for switching a number of switching voltage levels |
| US7585582B2 (en) * | 2006-06-28 | 2009-09-08 | Nan Ya Printed Circuit Board Corporation | Fuel cell module utilizing wave-shaped flow board |
| EP2080262B1 (en) | 2006-10-18 | 2010-03-17 | ABB Research LTD | Converter circuit for switching a large number of switching voltage levels |
| WO2010047586A1 (en) * | 2008-10-20 | 2010-04-29 | Stichting Energieonderzoek Centrum Nederland | Sofc stack with corrugated separator plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014202320A1 (en) * | 2013-06-20 | 2014-12-24 | Cellstrom Gmbh | Laminated bipolar plate |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2377797A1 (en) | 2012-04-02 |
| ES2377797B1 (en) | 2013-02-14 |
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