Abstract: An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.

Abstract: A metallic plate for an electrochemical system is provided. The plate has at least one measuring structure formed in one piece with the plate. The measuring structure has at least two cuts through the plate and a first deformation of the plate arranged between the cuts. The cut edges are spaced apart from one another in sections by the first deformation so that the cut edges form at least two windows in the plate. The measuring structure has at least a second deformation of the plate. The plate is deformed by the second deformation in the region of the plate adjacent to the windows in such a manner that the windows allow light that falls on the plate orthogonally to the main plane of the plate to pass through. As described is a method of producing a metallic plate including at least one measuring structure.

Abstract: An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.

Abstract: A metallic plate for an electrochemical system is provided. The plate has at least one measuring structure formed in one piece with the plate. The measuring structure has at least two cuts through the plate and a first deformation of the plate arranged between the cuts. The cut edges are spaced apart from one another in sections by the first deformation so that the cut edges form at least two windows in the plate. The measuring structure has at least a second deformation of the plate. The plate is deformed by the second deformation in the region of the plate adjacent to the windows in such a manner that the windows allow light that falls on the plate orthogonally to the main plane of the plate to pass through. As described is a method of producing a metallic plate including at least one measuring structure.

Abstract: The present invention relates to a bipolar plate (1) for electrochemical systems which contains a first plate (2) with a first flowfield (2a) for media distribution as well as a second plate (3) with a second flowfield (3a) for media distribution. This first plate in the region of the first flow field at least in regions comprises a plane surface section (4) from which discrete projections (5) distanced to one another project arranged in a distributed manner. Furthermore a method for manufacturing this bipolar plate is suggested as well as an electrochemical system which contains this bipolar plate. According to the invention it is possible in an inexpensive manner to manufacture a bipolar plate which permits the construction of fuel cells functioning with a low peripheral consumption (pumps, compressors) and which are safer with regard to their operation.

Abstract: The present invention relates to a contact plate for fuel cells with a coherent active area (11) on at least one side of the contact plate, wherein the active area (11) consists of a contact surface (2) which over the whole surface comprises a coating (4) of an electrically conductive, corrosion-resistant material, and of recesses (3) so that the recesses (3) form a channel structure, wherein the coating (4) furthermore at least in the bottom regions (5) of the recesses (3) is omitted. The invention further relates to a corresponding fuel cell or to a fuel cell stack with at least one such contact plate as well as to various methods for manufacturing such contact plates which may serve as bipolar plates as well as monopolar plates or end plates. With the contact plate according to the invention, one achieves an optimally reduced contact resistance with a minimal material expense for the coating (4).

Abstract: The present invention relates to a fuel cell arrangement, containing at least one bipolar plate layer (1) and an bonding partner—preferably an membrane electrode assembly (MEA) (5), wherein the bonding partner is bonded onto the bipolar plate layer (1) with a pressure-sensitive adhesive or a physically bonding adhesive, which are located on a three-dimensional sealing structure of the bipolar plate layer and/or edge region of the bipolar plate layer adjacent thereon.

Abstract: The invention deals with an electrochemical system for compressing gases and/or for producing gases by electrolysis, consisting of an electrochemical compressor stack (1) having layering of several electrochemical cells, which are separated from one another in each case by bipolar plates (3; 3?), wherein the bipolar plates have openings for media supply and media discharge (5a, 5b) for the electrochemical cells and the electrochemical cell stack can be placed under mechanical compressive strain in direction (6) of the layering. The bead arrangements (7; 7?) are resilient and are provided at least in some regions to seal the openings (4, 5a, 5b) and/or an electrochemically active region (10) of the electrochemical cells.

Abstract: The present invention relates to a bipolar plate for fuel cells, comprising at least a shaped, at least partially electrically conductive foil (1), the bipolar plate having a channel structure (5) formed by the shaping of the foil (1), to convey reactants to electrodes of adjacent fuel cells and to carry away reaction products, and a microstructure (4) is integrated into the foil (1) to increase the rigidity of the foil (1). The invention also relates to a method for manufacturing corresponding bipolar plates.

Abstract: The present invention relates to a high-temperature fuel cell system, consisting of a fuel cell stack (1) with a layering of several ceramic fuel cells (2) which in each case are separated from one another by way of interconnect layer (3). The interconnect layers comprise openings for cooling (4) or for the supply (5a) and removal (5b) of media to and from the fuel cells. The fuel cell stack may be set under mechanical compressive stress in the direction (6) of the layering. Elastic bead arrangements (7; 7?) for sealing the openings (4, 5a, 5b) or the electrically active region (10) are provided at least in regions.

Abstract: The present invention relates to a contact plate for fuel cells with a coherent active area (11) on at least one side of the contact plate, wherein the active area (11) consists of a contact surface (2) which over the whole surface comprises a coating (4) of an electrically conductive, corrosion-resistant material, and of recesses (3) so that the recesses (3) form a channel structure, wherein the coating (4) furthermore at least in the bottom regions (5) of the recesses (3) is omitted. The invention further relates to a corresponding fuel cell or to a fuel cell stack with at least one such contact plate as well as to various methods for manufacturing such contact plates which may serve as bipolar plates as well as monopolar plates or end plates. With the contact plate according to the invention, one achieves an optimally reduced contact resistance with a minimal material expense for the coating (4).

Abstract: The invention deals with an electrochemical system for compressing gases and/or for producing gases by electrolysis, consisting of an electrochemical compressor stack (1) having layering of several electrochemical cells, which are separated from one another in each case by bipolar plates (3; 3?), wherein the bipolar plates have openings for media supply and media discharge (5a, 5b) for the electrochemical cells and the electrochemical cell stack can be placed under mechanical compressive strain in direction (6) of the layering. The bead arrangements (7; 7?) are resilient and are provided at least in some regions to seal the openings (4, 5a, 5b) and/or an electrochemically active region (10) of the electrochemical cells.

Abstract: The present invention relates to a bipolar plate (1) for electrochemical systems which contains a first plate (2) with a first flowfield (2a) for media distribution as well as a second plate (3) with a second flowfield (3a) for media distribution. This first plate in the region of the first flow field at least in regions comprises a plane surface section (4) from which discrete projections (5) distanced to one another project arranged in a distributed manner. Furthermore a method for manufacturing this bipolar plate is suggested as well as an electrochemical system which contains this bipolar plate. According to the invention it is possible in an inexpensive manner to manufacture a bipolar plate which permits the construction of fuel cells functioning with a low peripheral consumption (pumps, compressors) and which are safer with regard to their operation.

Abstract: Fuel cell with integrated humidification, comprise a cathode-side or anode-side humidification unit with a heat exchanger, a condensate separator, a capillary tube and a Venturi-nozzle and/or pump. A method for humidifying process gas for the operation of a fuel cell is disclosed wherein only product water is used and the gas containing O2 for the cathode is humidified by the cathode off-gas which contains water vapor by means of a first humidification unit and/or the combustion gas containing H2 for the anode is humidified by the anode off-gas which contains water vapor by means of a second humidification unit, or the combustion gas containing H2 for the anode is humidified by the cathode off-gas which contains water vapor by means of a first humidification unit and/or the gas containing O2 for the cathode is humidified by the anode off-gas which contains water vapor by means of a second humidification unit.

Abstract: The invention relates to a fuel cell with integrated humidification, comprising a cathode-side or anode-side humidification unit with a heat exchanger, a condensate separator, a capillary tube and a Venturi nozzle and/or pump.

Abstract: An electrochemical arrangement with at least one distribution structure for introducing and distributing a reactant, which is designed as a composite of several layers, and wherein the distribution structure is led essentially in a plane and is elastic against pressure loading perpendicular to the plane in a controlled manner.

Abstract: The present invention relates to supply plate (1), a base plate for the assembly of such a supply plate, as well as a method for manufacturing a supply plate for electrochemical systems. Two base plates (2a, 2b) are thermally joined to one another using a joining agent, wherein this joining agent (3) has a lower melting point than the material of the base plates (2a, 2b). At least one first base plate (2a) comprises at least one pocket (4a) into which joining agent is filled, and subsequently the second base plate (2b) is applied onto a joining plane (F) of the first plate, and a connection of the base plates (2a, 2b) is effected by way of the impact of heat on the joining agent.

Abstract: The present invention relates to a fuel cell arrangement, containing at least one bipolar plate layer (1) and an bonding partner—preferably an membrane electrode assembly (MEA) (5), wherein the bonding partner is bonded onto the bipolar plate layer (1) with a pressure-sensitive adhesive or a physically bonding adhesive, which are located on a three-dimensional sealing structure of the bipolar plate layer and/or edge region of the bipolar plate layer adjacent thereon.

Abstract: The invention relates to a bipolar plate (1) and to a method for the production thereof. Said bipolar plate has two plate-shaped metal sections (2a, 2b) which are connected to one another, forming a bipolar plate. Connection of the metal sections is done by means of laser beam welding.

Abstract: The present invention relates to a bipolar plate for fuel cells, comprising at least a shaped, at least partially electrically conductive foil (1), the bipolar plate having a channel structure (5) formed by the shaping of the foil (1), to convey reactants to electrodes of adjacent fuel cells and to carry away reaction products, and a microstructure (4) is integrated into the foil (1) to increase the rigidity of the foil (1). The invention also relates to a method for manufacturing corresponding bipolar plates.