EP4562695A2 - Bipolarplatte, bipolarplattensystem, endplatte und brennstoffzelle - Google Patents
Bipolarplatte, bipolarplattensystem, endplatte und brennstoffzelleInfo
- Publication number
- EP4562695A2 EP4562695A2 EP23741652.4A EP23741652A EP4562695A2 EP 4562695 A2 EP4562695 A2 EP 4562695A2 EP 23741652 A EP23741652 A EP 23741652A EP 4562695 A2 EP4562695 A2 EP 4562695A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bipolar plate
- opening
- flow
- sealing element
- openings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/044—Specially-shaped ends
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- 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
- H01M8/0276—Sealing means characterised by their form
-
- 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
- H01M8/0286—Processes for forming seals
-
- 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
- H01M2008/1095—Fuel cells with polymeric 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
- Bipolar plate Bipolar plate, bipolar plate system, end plate and fuel cell
- the invention relates to a bipolar plate, a bipolar plate system, an end plate and/or a fuel cell.
- Fuel cells are already known from the prior art. These serve to release electrons, in particular through the use of a reaction, in order to generate a current flow or to be able to provide energy.
- Different fluids can be used as fuel, e.g. hydrogen.
- the problem with the known systems is that the fuel cells consist of several cells, each of which is separated from one another by bipolar plates. These cells are usually arranged in stacks and covered at the ends by an end plate in order to achieve a compact design. The cells are usually fixed to each other and the end plate using an external fastener. However, this means that the bipolar plates and the end plate are exposed to large bending stresses and/or a large amount of space is required.
- bipolar plate according to claim 1
- bipolar plate system according to claim 4
- end plate according to claim 8
- fuel cell according to claim 10.
- Further advantages, features and embodiments result from the subclaims, the description and the figures.
- the bipolar plate serves to form or be able to form part of a fuel cell.
- the bipolar plate extends in a longitudinal direction and in a width direction, the longitudinal direction and the width direction being in particular perpendicular to one another, the bipolar plate having a plurality of openings, the openings having an outer contour, the outer contour of the openings each passing through a mounting opening and at least one flow breakthrough are formed, wherein the mounting breakthrough forms a circular segment-shaped part of the outer contour of the breakthrough, and wherein the mounting breakthrough is designed to accommodate a fastening means or connecting means.
- the bipolar plate is a part and/or can be arranged or used in a fuel cell.
- an MEA is arranged between two bipolar plates.
- An MEA is to be understood as meaning a membrane-electrode unit in the sense of the invention.
- the bipolar plates therefore serve to transport fuel, in particular hydrogen, and/or oxygen and/or combustion products, in particular fluids, e.g. B. water or water vapor, from and / or to the MEA and at the same time to at least partially limit the intake volume for the MEA.
- the bipolar plates can be used in particular to conduct electrons.
- the bipolar plates are in particular, at least partially, made of a conductive material and/or made of plastic and/or at least partially made of an insulating material.
- the bipolar plates can therefore in particular form part of a stack or a “sack” of a fuel cell.
- the bipolar plates extend in particular in a longitudinal direction and in a width direction. The longitudinal direction is in particular the direction in which the bipolar plate has its largest main dimension.
- the width direction can in particular be the direction in which the width of the bipolar plate is measured.
- Standing perpendicular to the longitudinal direction and/or the width direction can be a height direction.
- the height direction can in particular be the direction in which the material thickness of the bipolar plate is measured. It is particularly useful for the longitudinal direction and the width direction to be perpendicular to one another.
- the longitudinal direction can be particularly preferred.
- the width direction and the height direction are each perpendicular to one another. In other words, the longitudinal direction, the width direction and the height direction can form a rectangular coordinate system with each other.
- the bipolar plate includes a variety of openings. These openings penetrate the bipolar plate in particular completely, with the main direction of extension of the openings being in particular the height direction.
- the openings can penetrate the bipolar plate in the height direction. This makes it possible to guide means, in particular fasteners and/or connecting means, and/or fluids through the bipolar plate. In other words, the openings can therefore serve to allow fluid to flow from one side of the bipolar plate to the other side of the bipolar plate and at the same time also provide a receiving space for a fastening or tensioning means.
- the flow openings of the openings are particularly intended for the fluid line.
- the openings themselves are formed by a component, which is the flow opening, and at least also by another component, which is referred to as the assembly opening.
- the assembly opening serves to accommodate a fastening means or connecting means, which can also be a clamping means or connecting means, in order to enable tensioning of the bipolar plate and/or the “stacks” or the stacks of the fuel cell.
- the breakthrough can therefore be formed by a combination of a mounting breakthrough and at least one flow breakthrough.
- the bipolar plate expediently has a large number of openings, each of which has at least one flow opening and one mounting opening.
- the openings are arranged or designed in such a way that they form an outer contour on the bipolar plate.
- the outer contour is in particular the outer edge of the opening on a surface bordering the bipolar plate, in particular in the height direction.
- This outer contour of the opening or openings is formed at least in sections by the flow opening and at least in sections by the mounting opening.
- the edge of the breakthrough is at least partially formed by the assembly breakthrough and at least partially also by the flow breakthrough.
- the assembly breakthrough forms in particular a circular segment-shaped part of the outer contour of the opening.
- at least part of the outer opening is formed by a circular section, which at the same time also delimits the mounting opening.
- the breakthrough can thus have a part-circle segment-shaped section, which is just formed by the mounting breakthrough.
- a screw in the sense of the invention can in particular be a fastening means and/or connecting means which has an actuating head and/or an actuating section and also has an external thread and/or an internal thread, which is introduced in particular into a shaft section.
- the bipolar plate has a flow region, wherein the flow region, in particular later, serves to delimit a fluid volume, wherein the fluid volume is or can be in fluid communication with at least two openings.
- the flow area is in particular that area of the bipolar plate, or the external surface or surfaces of the bipolar plate bordering in the height direction, which is or can later be brought into fluid contact with the MEA.
- the flow area can therefore form or be or include a surface on the bipolar plate.
- the bipolar plate expediently has both a flow region, which is formed by a surface bordering in the positive height direction, and a flow region, which is formed by a surface bordering in the negative height direction.
- the flow area serves in particular later to limit the fluid volume that is in communication with the MEA and/or to at least partially provide the volume in which the MEA is arranged.
- the flow region therefore in particular borders a fluid volume which is or can be in fluid communication with at least two openings in the bipolar plate. This can be particularly crucial if a sealing element is later arranged and/or on the bipolar plate is arranged, which just allows a fluid flow to take place from the breakthrough to the flow area and from the flow area to another breakthrough.
- the openings, in particular the flow intrusions of the openings, which are in fluid communication with the flow area or the fluid volume can be used to achieve an inflow and outflow of fluids into the fluid volume.
- the assembly breakthrough and the flow breakthrough of a breakthrough or breakthroughs expediently penetrate the bipolar plate. This makes it possible to achieve a particularly simple implementation of a fastening and/or connecting means and a flow fluid through the bipolar plate.
- the flow opening is advantageously designed in such a way that it extends from the mounting opening to the flow region in the plane which is spanned by the longitudinal and width directions. In this way, a particularly favorable design of the flow breakthrough can be achieved in terms of flow technology.
- the circular segment-shaped part of the mounting opening expediently forms at least 51%, preferably at least 65%, and particularly preferably at least 75%, of a circle.
- the part in the shape of a segment of a circle can form at least 51% of a complete circle, preferably at least 65% of a complete circle, and particularly preferably at least 75% of a complete circle.
- such a configuration can in particular ensure a positive position securing of a fastening/connecting means within the mounting opening or at least be provided in an emergency, so that in particular the bipolar plate can slip in relation to the fastening/connecting means in a longitudinal direction and width direction plane is positively prevented or can be prevented.
- the circular segment-shaped part should form at least 65%, preferably at least 75%, of a complete circle.
- the positive locking between the bipolar plate and a fastening/connecting means can be further improved in order to achieve better accuracy in securing the position.
- This type of positive securing of the bipolar plate relative to the fastening/connecting means allows particularly simple assembly to be achieved. This makes it possible later, in particular, to thread the individual bipolar plates via the fastening/connecting means, so that assembly can be simplified.
- the circular segment-shaped part of the mounting opening preferably forms a maximum of 98%, preferably a maximum of 90%, and particularly preferably a maximum of 80%, of a circle.
- the parts that are missing to form the complete circle belong in particular to the flow breakthrough. In other words, such a design can ensure that there is sufficient space for the flow breakthrough in the breakthrough, so that a sufficient flow area or flow possibility is provided.
- the bipolar plate preferably has flow grooves, in particular in one or the flow region of the bipolar plate, with the flow grooves ending and/or starting in particular in a breakthrough.
- the bipolar plate can have grooves, in particular in a surface that delimits the bipolar plate in the height direction, which can promote and/or achieve a fluid flow. These grooves are particularly called flow grooves.
- These flow grooves expediently run on the bipolar plate or are arranged on the bipolar plate in such a way that they end and/or start in a breakthrough, in particular in a flow breakthrough. In other words, the grooves extend into the flow breakthrough or breakthrough. In this way, a connection of the flow grooves that is particularly favorable in terms of flow technology can be achieved.
- the flow grooves are formed by straight and/or rectangular sections and/or the flow grooves run in a meandering shape.
- the flow groove has a particularly large extent. This allows a particularly effective and homogeneous supply of fluids and/or a removal of fluids into and/or from the MEA into the flow grooves. Due to the meandering design of the flow groove, a particularly long flow length of the grooves can also be achieved and thus a particularly homogeneous supply or removal of fluids from and/or into the MEA.
- the part of the outer contour of the opening, which is formed by the flow opening is further away from the center of gravity of the opening or from the center of the circular segment-shaped part than the part of the outer contour of the opening, which is formed by the mounting opening.
- the flow opening can extend away from the otherwise circular mounting opening like an extension.
- the assembly opening forms all parts of the opening in the shape of a segment of a circle and/or is formed exclusively by parts in the shape of a segment of a circle, which in particular all have the same center.
- the center of the circular segment-shaped part is in particular the point around which the radius of the circular segment-shaped part is determined or the point which is the same distance from all points of the circular segment-shaped part.
- the bipolar plate preferably has a width to length ratio of in particular less than or equal to 1 to 3, with the bipolar plate having an opening, in particular a plurality of openings, in its central region in the longitudinal direction.
- the dimension of the bipolar plate can be in Width direction to the dimension of the bipolar plate in the longitudinal direction is in a ratio of less or equal to 1 to 3. If such a relationship exists, an opening, in particular a large number of openings, can be provided in the longitudinal direction, in particular in a central region.
- the central region in the longitudinal direction is in particular that region of the bipolar plate in the longitudinal direction which extends in the longitudinal direction from the ideal center point +/-25%, preferably +/-15%, and particularly preferably +/- 10%, and particularly preferably +/- 5% of the maximum length of the bipolar plate extends in the longitudinal direction.
- the center of the bipolar plate is in particular the center of gravity or the center of gravity of the bipolar plate.
- a further aspect of the invention may relate to a use of a bipolar plate in/for a fuel cell.
- the bipolar plate system comprises a bipolar plate as described above and/or below, and a sealing element, in particular a sealing ring.
- the sealing element expediently rests on the bipolar plate, with the sealing element following or being able to follow the circular segment-shaped part of the outer contour of an opening at least in sections.
- the bipolar plate system therefore includes in particular at least one sealing element, which can be designed as a seal.
- a seal is a sealing element that is closed in itself. In other words it is poetry therefore a sealing element without end.
- the sealing element rests in particular on the bipolar plate; this can happen in particular through direct contact of the sealing element with the bipolar plate.
- This contact or this contact area of the sealing element expediently forms a self-contained contour with the bipolar plate.
- the sealing element can therefore always be in contact with the bipolar plate along its extension.
- the sealing element expediently follows at least in sections the or a segment-shaped part of the outer contour of an opening.
- the following is to be understood in particular as meaning that the projection of the sealing element and the projection of the outer contour onto a plane that is spanned by the longitudinal direction and the width direction overlap and/or that the course of the sealing element and the outer contour at least is the same in the following area and / or the sealing element rests at least in sections on the circular segment-shaped part of the outer contour.
- the sealing element follows at least 40%, preferably at least 60%, and particularly preferably at least 80%, and particularly preferably at least 90%, and most particularly preferably at least 97%, of the circular segment-shaped part of the outer contour of an opening.
- the sealing element follows at least 40%, preferably at least 60%, and particularly preferably at least 80%, and particularly preferably at least 90%, and most particularly preferably at least 97%, of the outer contour of a breakthrough.
- the sealing element projects into one or more openings and/or projects into at least two openings.
- the openings which have a mounting opening and a flow opening and/or through which a fastening Z-connecting means is guided and/or which serve or are designed to accommodate a fastening means are relevant.
- the seal can be arranged between the fastening Z-connecting means and the edge of a breakthrough, so that contact between the fastening Z-connecting means and the breakthrough is prevented.
- the sealing element can therefore be used to bring about electronic insulation between the fastening Z-connection means and the bipolar plate.
- the sealing element is expediently formed in particular from an insulating material.
- the bipolar plate system has a plurality of sealing elements, with the sealing elements at least partially following the course of the outer contour of at least one opening, and/or with each opening being surrounded by an outer contour of a sealing element. Decisive for this are in particular those openings which have a mounting opening and a flow opening and/or which are designed to accommodate a fastening Z-connecting means. By designing such that the openings and/or at least one of the openings is surrounded by an outer contour of a sealing element, it can be achieved that the opening can be used to guide fluid into and/or out of a fluid volume.
- an outer contour of a sealing element Surrounding the opening by an outer contour of a sealing element is to be understood in particular as meaning that when projected onto the plane formed by the longitudinal direction and the width direction of the surrounding sealing element and the opening, the outer contour of the projection of the sealing element or the outer edge of this contour encloses and/or contains the outer contour of the opening.
- the sealing element is fixed, in particular cohesively and/or irreversibly, to the bipolar plate, and/or the sealing element is produced by a screen printing process.
- the advantage of using a screen printing process lies in particular in the cost-effective production of a bipolar plate system with a sealing element.
- a simple assembly of the bipolar plate system can be achieved in particular. In order to achieve this determination, this is in particular carried out in a materially bonded manner, for example by gluing and/or by a screen printing process.
- the sealing element is expediently fixed irreversibly to the bipolar plate, so that the connection between the sealing element and the bipolar plate can only be achieved by destroying the connection. This allows a particularly high sealing effect to be achieved.
- the sealing element is arranged on the bipolar plate in such a way that the sealing element forms a self-contained contour on the bipolar plate, advantageously at least within the closed contour two flow openings, in particular of different openings, and / or the flow area of the bipolar plate is or are arranged.
- a particularly high sealing effect can be achieved.
- the flow area of the bipolar plate and/or at least the outlet or the contour of flow openings, in particular of different openings are also arranged within this sealed area or within the closed contour. In this way, a particularly homogeneous or targeted supply and removal of fluids into the flow area of the bipolar plate can be achieved.
- the bipolar plate system comprises a fastening/connecting means, wherein the fastening/connecting means is guided through the opening, in particular through the assembly opening of the opening, with the fastening/connecting means in particular contacting the sealing element.
- insulation can be achieved between the fastening/connecting means and the bipolar plate.
- the fastening/connecting means expediently has an actuation area, in particular a head, and a mounting area, the mounting area forming a thread.
- the mounting area is expediently formed in and/or around a shaft area of the fastening/connecting means.
- the fastening/connecting means extends in particular in the height direction.
- the main extension direction of the fastening/connecting means is advantageously designed parallel to the height direction.
- Particularly preferred is through each breakthrough of the bipolar plate, which has a mounting breakthrough and a flow breakthrough Fastening Z-connecting means guided. This makes it possible to achieve a particularly homogeneous tensioning option for the bipolar plate.
- the fastening/connecting means has a flow passage extending along a height direction or the height direction, the flow passage being in fluid communication with the flow breakthrough, which also forms the breakthrough through which the fastening/connecting means is guided .
- the fastening/connecting means can be a banjo, wherein a flow passage can be formed within the banjo.
- the flow passage can also be introduced externally into the fastening/connecting means, for example through an external groove.
- the flow passage extends in particular in the height direction. In other words, the flow passage can therefore provide fluid conveying capability in the height direction.
- This flow passage of the fastening/connecting means is in particular in fluid communication with the flow opening, so that a fluid can flow from the flow passage into the flow opening. This makes it possible to provide a particularly effective flow option.
- the bipolar plate system comprises a plurality of fastening/connecting means, wherein the plurality of fastening/connecting means are each guided through a breakthrough, this breakthrough in particular having a mounting breakthrough and/or a flow breakthrough.
- a further aspect of the invention may relate to the use of a bipolar plate system and/or a fastening means or/connecting means in/for a fuel cell.
- a further aspect of the invention may relate to an end plate for a fuel cell, wherein the end plate extends in a longitudinal direction and a width direction, wherein the end plate has two mounting areas, in particular spaced apart from one another in the longitudinal direction, the bending rigidity of the end plate, in particular between the mounting areas, is variable, advantageously decreasing towards the assembly areas.
- the end plate extends in particular in a longitudinal direction and a width direction, wherein the longitudinal direction of the end plate can correspond to the longitudinal direction as described above and below and / or the width direction can correspond to the width direction as described above and below.
- the longitudinal direction of the end plate is in particular the direction in which the end plate has its largest main dimension and/or in which the length of the end plate is determined.
- the width direction is in particular the direction in which the width of the end plate is determined and/or in which the end plate has its second largest main dimension.
- the longitudinal direction and the width direction can in particular be perpendicular to a height direction, in particular this height direction is aligned parallel and/or congruent with the height direction already set out previously and/or below.
- the end plate serves in particular to be arranged in a fuel cell and to form a distal end of the fuel cell, in particular in the height direction. In order to achieve assembly of the end plate, it has in particular two assembly areas that are spaced apart from one another.
- the assembly areas are in particular areas which serve to provide force transmission to the end plate.
- An area in which the end plate has a variable flexural rigidity is expediently provided between these two assembly areas.
- this area with variable bending stiffness is spread out in such a way that it encompasses and/or forms a central area in the longitudinal direction of the end plate.
- the middle area of the end plate is determined in the same way as the middle area of the bipolar plate.
- the flexural rigidity of the area lying between the assembly areas is expediently designed such that its flexural rigidity decreases in the direction of the assembly areas. Therefore, the bending stiffness in the widest area in the longitudinal direction is particularly important assembly areas largest.
- the end plate can also be referred to as a head plate in the sense of the invention.
- the end plate has arcuate stiffening ribs, the arcuate stiffening ribs extending in particular parallel to the longitudinal direction.
- These arcuate stiffening ribs expediently have a variable height in the longitudinal direction.
- the arcuate stiffening ribs are in particular designed in such a way that they have a largest main dimension parallel to the longitudinal direction in order to provide particularly good bending stress absorption.
- the end plate in particular the assembly areas of the end plate, expediently has fixing openings.
- the fastening/connecting means extend through these fixing openings, whereby the fastening/connecting means can in particular also extend through the or some of the openings of the bipolar plates.
- a further aspect of the invention may relate to the use of an end plate in/for a fuel cell.
- the fuel cell expediently comprises at least one bipolar plate, preferably a plurality of bipolar plates, in particular as described above and/or below.
- the fuel cell can also relate to a bipolar plate system, preferably a plurality of polar plate systems and/or a bipolar plate system with a plurality of bipolar plates and/or fastening/connecting means and/or sealing elements, in particular as described above and/or below.
- the fuel cell can also have at least one end plate or two end plates, in particular as described above and/or below.
- a cavity is formed between and/or in two bipolar plates, which is partially delimited by the flow area of one or both bipolar plates, with a fluid entering the cavity through one of the openings, in particular through a flow opening, of the bipolar plate or can reach and/or wherein a fluid passes or can pass from the cavity through one of the openings, in particular through a flow opening, of the bipolar plate.
- the flow region of the bipolar plate can therefore be in fluid communication with a flow breakthrough of one breakthrough and a flow breakthrough of another breakthrough. This creates a particularly effective and simple way of bringing fluids into contact with the flow area via the flow openings.
- an MEA is arranged in the cavity.
- An MEA is understood to mean a membrane-electrode unit. In this way, a particularly compact design of the fuel cell can be achieved.
- Figure 1 shows a bipolar plate
- Figure 2 shows a bipolar plate system and/or a bipolar plate
- Figure 3 is a view of an alternative embodiment of a bipolar plate
- Figure 4 shows a bipolar plate system with a bipolar plate and a fastening means
- Figure 5 shows a fuel cell with an end plate and a plurality of bipolar plates and bipolar plate systems
- FIG. 6 is an isometric view of an end plate.
- An isometric view of a bipolar plate 210 is shown in FIG.
- the bipolar plate 210 has a large number of openings 240, which extend in the height direction H.
- the openings 240 each include a mounting opening 242 and a flow opening 244.
- the mounting opening 242 each has a part in the shape of a segment of a circle and/or forms a part in the shape of a segment of a circle of the outer contour of the opening 240.
- the mounting opening 242 is designed to accommodate a fastening means or a connecting means.
- the bipolar plate has a width to length ratio of less than or equal to 1 to 3, with a plurality of openings 240 being arranged in the bipolar plate 210 in the central region in the longitudinal direction L. This allows a particularly homogeneous bracing force distribution to be formed on the bipolar plate 210.
- FIG. 2 shows an isometric view of bipolar plates 210, which are arranged one above the other in the height direction H.
- a sealing element 310 is arranged between the bipolar plates 210.
- a bipolar plate system 300 can also be seen in FIG.
- a large number of sealing elements 310 are fixed on it.
- These sealing elements 310 each surround a breakthrough 240.
- Each of the breakthroughs 240 includes at least one mounting breakthrough 242 and a flow breakthrough 244.
- the sealing element 310 follows at least 60% of the circular segment-shaped part of the outer contour of each breakthrough 240.
- the circular segment-shaped part of the mounting breakthrough 242 forms at least 65% a circle of the respective breakthroughs 240.
- the flow openings 244 are designed in such a way that they face the flow area 252.
- the flow area 252 is also surrounded by a sealing element 310.
- Each sealing element 310 protrudes at least partially into one opening 240 or two openings 240, namely at least partially into the mounting opening 242.
- the width direction B and the longitudinal direction L are perpendicular to the height direction H.
- the flow grooves 250 which lead through the flow area 252, extend from the opening 240 arranged at the bottom left to the opening 240 arranged at the top right.
- the flow grooves 250 are arranged in a meandering shape.
- the flow area 252 is surrounded by the sealing element 310, which also surrounds two openings 240.
- a bipolar plate system 300 is shown in FIG.
- the bipolar plate system 300 comprises a plurality of sealing elements 310 and a plurality of bipolar plates 210 as well as a fastening means 9.
- the fastening means 9 is designed such that it has a flow passage extending in the height direction H, the flow passage being in fluid communication with the flow opening 244 of the respective openings 240. As a result, a particularly good and advantageous fluid supply and/or removal can take place through the fastening means 9.
- FIG. 5 shows a fuel cell 1, the fuel cell 1 having a plurality of fastening means 9, which can also be referred to as connecting means, and a plurality of bipolar plates 210 and/or bipolar plate systems 300.
- the fuel cell 1 is limited in the height direction H at least in sections by an end plate 500.
- An end plate 500 is shown in FIG.
- the end plate 500 extends in the longitudinal direction L and in the width direction B, the end plate 500 having mounting regions 502 spaced apart from one another in the longitudinal direction L, with the mounting areas 502 being spaced apart from one another in the longitudinal direction L. day areas 502 fixing breakthroughs 510 are arranged.
- the mounting areas 502 are arranged in such a way that they each have at least three fastening openings 510.
- the bending stiffness of the end plate 500 is variable, with this decreasing in the direction of the mounting areas 502. This variable bending stiffness can be achieved by the stiffening ribs 520, which extend parallel to the longitudinal direction L.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electrochemistry (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
- Springs (AREA)
- Connection Of Plates (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Dowels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022119087.0A DE102022119087A1 (de) | 2022-07-29 | 2022-07-29 | Verbindungsmittel, Batterieanordnung, Brennstoffzelle und Verfahren zum Herstellen eines Verbindungsmittels |
| DE102022131561.4A DE102022131561A1 (de) | 2022-11-29 | 2022-11-29 | Bipolarplatte, Bipolarplattensystem, Endplatte und Brennstoffzelle |
| DE102022131562.2A DE102022131562A1 (de) | 2022-11-29 | 2022-11-29 | Brennstoffzelle |
| PCT/EP2023/069180 WO2024022805A2 (de) | 2022-07-29 | 2023-07-11 | Bipolarplatte, bipolarplattensystem, endplatte und brennstoffzelle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4562695A2 true EP4562695A2 (de) | 2025-06-04 |
Family
ID=87312078
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23741653.2A Pending EP4562696A2 (de) | 2022-07-29 | 2023-07-11 | Brennstoffzelle |
| EP23741650.8A Pending EP4562313A1 (de) | 2022-07-29 | 2023-07-11 | Verbindungsmittel und verfahren zum herstellen eines verbindungsmittels |
| EP23741652.4A Withdrawn EP4562695A2 (de) | 2022-07-29 | 2023-07-11 | Bipolarplatte, bipolarplattensystem, endplatte und brennstoffzelle |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23741653.2A Pending EP4562696A2 (de) | 2022-07-29 | 2023-07-11 | Brennstoffzelle |
| EP23741650.8A Pending EP4562313A1 (de) | 2022-07-29 | 2023-07-11 | Verbindungsmittel und verfahren zum herstellen eines verbindungsmittels |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20260038851A1 (de) |
| EP (3) | EP4562696A2 (de) |
| JP (3) | JP2025525670A (de) |
| KR (3) | KR20250041007A (de) |
| CN (3) | CN119604996A (de) |
| CA (1) | CA3262595A1 (de) |
| DE (2) | DE202023104081U1 (de) |
| MX (3) | MX2025001147A (de) |
| WO (3) | WO2024022806A2 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3673155B2 (ja) * | 2000-08-11 | 2005-07-20 | 本田技研工業株式会社 | 燃料電池スタック |
| DE10204721A1 (de) * | 2002-02-05 | 2003-08-21 | Fischer Georg Rohrleitung | Federschraube |
| KR100673754B1 (ko) * | 2005-03-10 | 2007-01-24 | 삼성에스디아이 주식회사 | 스택 및 이를 채용한 연료 전지 시스템 |
| WO2010099239A2 (en) * | 2009-02-24 | 2010-09-02 | Flex Technology, Inc. | Flexible screw |
| US9482260B1 (en) * | 2009-02-24 | 2016-11-01 | William R Krause | Flexible fastening device for industrial use |
| JP4800443B2 (ja) * | 2009-03-04 | 2011-10-26 | パナソニック株式会社 | 高分子電解質型燃料電池用ガスケット |
| JP5979562B2 (ja) * | 2012-05-17 | 2016-08-24 | パナソニックIpマネジメント株式会社 | 燃料電池及びその製造方法 |
| DE102012010994A1 (de) * | 2012-06-02 | 2013-12-05 | Volkswagen Aktiengesellschaft | Endplatte für eine Brennstoffzelle sowie Brennstoffzelle mit einer solchen |
| CA2907951C (en) * | 2013-03-29 | 2017-10-24 | Morimura Sofc Technology Co., Ltd. | Fuel gas flow path in a solid oxide fuel cell |
| JP6059615B2 (ja) * | 2013-08-01 | 2017-01-11 | 本田技研工業株式会社 | 燃料電池スタック |
| JP2015170398A (ja) * | 2014-03-05 | 2015-09-28 | パナソニックIpマネジメント株式会社 | 固体高分子電解質型燃料電池 |
| CN207149634U (zh) * | 2017-08-04 | 2018-03-27 | 湖南省银峰新能源有限公司 | 液流电池用电堆端板 |
| JP7187463B2 (ja) * | 2017-08-21 | 2022-12-12 | 三洋電機株式会社 | 電池モジュール及びこれを装備する車両 |
-
2023
- 2023-07-11 EP EP23741653.2A patent/EP4562696A2/de active Pending
- 2023-07-11 KR KR1020257005540A patent/KR20250041007A/ko active Pending
- 2023-07-11 JP JP2025504715A patent/JP2025525670A/ja not_active Withdrawn
- 2023-07-11 CN CN202380056741.9A patent/CN119604996A/zh active Pending
- 2023-07-11 CA CA3262595A patent/CA3262595A1/en active Pending
- 2023-07-11 EP EP23741650.8A patent/EP4562313A1/de active Pending
- 2023-07-11 US US18/998,883 patent/US20260038851A1/en active Pending
- 2023-07-11 KR KR1020257005594A patent/KR20250041012A/ko active Pending
- 2023-07-11 CN CN202380056727.9A patent/CN119630893A/zh active Pending
- 2023-07-11 KR KR1020257005562A patent/KR20250041010A/ko active Pending
- 2023-07-11 WO PCT/EP2023/069181 patent/WO2024022806A2/de not_active Ceased
- 2023-07-11 DE DE202023104081.0U patent/DE202023104081U1/de active Active
- 2023-07-11 JP JP2025504714A patent/JP2025525669A/ja not_active Withdrawn
- 2023-07-11 DE DE202023104082.9U patent/DE202023104082U1/de active Active
- 2023-07-11 WO PCT/EP2023/069180 patent/WO2024022805A2/de not_active Ceased
- 2023-07-11 EP EP23741652.4A patent/EP4562695A2/de not_active Withdrawn
- 2023-07-11 CN CN202380056176.6A patent/CN119631200A/zh active Pending
- 2023-07-11 WO PCT/EP2023/069178 patent/WO2024022804A1/de not_active Ceased
- 2023-07-11 JP JP2025504716A patent/JP2025526441A/ja not_active Withdrawn
-
2025
- 2025-01-28 MX MX2025001147A patent/MX2025001147A/es unknown
- 2025-01-28 MX MX2025001149A patent/MX2025001149A/es unknown
- 2025-01-28 MX MX2025001148A patent/MX2025001148A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP4562696A2 (de) | 2025-06-04 |
| DE202023104082U1 (de) | 2023-08-28 |
| WO2024022804A1 (de) | 2024-02-01 |
| CN119604996A (zh) | 2025-03-11 |
| MX2025001147A (es) | 2025-03-07 |
| JP2025525669A (ja) | 2025-08-05 |
| KR20250041010A (ko) | 2025-03-25 |
| EP4562313A1 (de) | 2025-06-04 |
| CN119630893A (zh) | 2025-03-14 |
| JP2025526441A (ja) | 2025-08-13 |
| JP2025525670A (ja) | 2025-08-05 |
| WO2024022805A3 (de) | 2024-05-23 |
| MX2025001148A (es) | 2025-03-07 |
| WO2024022806A2 (de) | 2024-02-01 |
| KR20250041012A (ko) | 2025-03-25 |
| KR20250041007A (ko) | 2025-03-25 |
| DE202023104081U1 (de) | 2023-08-25 |
| US20260038851A1 (en) | 2026-02-05 |
| WO2024022805A2 (de) | 2024-02-01 |
| WO2024022806A3 (de) | 2024-05-23 |
| CA3262595A1 (en) | 2025-06-12 |
| MX2025001149A (es) | 2025-03-07 |
| CN119631200A (zh) | 2025-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3350863B1 (de) | Separatorplatte für ein elektrochemisches system | |
| DE102018201497C5 (de) | Brennstoffzelle und metallischer Separator für eine Brennstoffzelle | |
| EP3350864B1 (de) | Separatorplatte für ein elektrochemisches system | |
| DE112007001371B4 (de) | Brennstoffzelle | |
| DE112008000472B4 (de) | Brennstoffzelle und Befestigungsvorrichtung für eine Brennstoffzelle | |
| WO2020030644A1 (de) | Elektrochemisches system | |
| DE102013214755A1 (de) | Elektrisches Speicherelement und Verfahren zu seiner Herstellung | |
| DE102018213184A1 (de) | Energie-Speicher-Gerät | |
| DE202015106197U1 (de) | Separatorplatte für ein elektrochemisches System und elektrochemisches System | |
| DE202021104475U1 (de) | Separatorplatte | |
| DE102009039901A1 (de) | Brennstoffzelleneinheit, Brennstoffzellenstapel mit Brennstoffzelleneinheiten | |
| EP3782218B1 (de) | Brennstoffzellenvorrichtung | |
| EP1589602B1 (de) | Kontaktfederblech und elektrochemische Batterie mit einem derartigen Kontaktfederblech | |
| DE102015211930A1 (de) | Separatorplatte für eine Brennstoffzelle | |
| DE102022203540A1 (de) | Separatorplatte mit homogenisierter sickenkraft im portbereich | |
| DE102019103024A1 (de) | Brennstoffzellenstapel | |
| EP4562695A2 (de) | Bipolarplatte, bipolarplattensystem, endplatte und brennstoffzelle | |
| DE102017220354A1 (de) | Brennstoffzellenvorrichtung | |
| DE102022131561A1 (de) | Bipolarplatte, Bipolarplattensystem, Endplatte und Brennstoffzelle | |
| DE102021132922A1 (de) | Brennstoffzellenstapel und Verfahren zur Herstellung eines Brennstoffzellenstapels | |
| DE102022131562A1 (de) | Brennstoffzelle | |
| DE102020101055A1 (de) | Reihenklemme zum Festlegen einer Reihenklemmanordnung auf einer Tragschiene | |
| DE102018103971A1 (de) | Brennstoffzellenstapel und Herstellungsverfahren hierfür | |
| DE102018114006A1 (de) | Bipolarplatte und Brennstoffzelle aufweisend eine Bipolarplatte | |
| DE202024100156U1 (de) | Elektrochemisches System mit Druckvergleichmäßigungsplatte |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250227 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20250909 |