Reinz-dichtungs Gmbh

Powercell Sweden Ab

Viessmann Werke Gmbh & Co

Reinz-dichtungs-gmbh Co. Kg.

Bernd Gaugler

Claudia Kunz

Joachim Scherer

Stephan Wenzel

Christian Schleier

Raimund Ströbel

Dieter Grafl

Raimund Stroebel

Lothar Quick

Kai-Uwe Lemke

Rainer Glueck

Andre Speidel

Kurt Hohe

Johann Waldvogel

Ludwig Jörissen

Ahmet Oruc

Joachim Scholta

Albrecht Sailer

Bernadette Gruenwald

Dominique Tasch

Armin Guetermann

Stefan Sommer

Ludwig Jörrisen

Andrè Speidel

Wolfgang Berroth

Johan Flink

Ludwig Jorrisen

Systems and methods for separator plates, bipolar plates, stacks of plates, and electrochemical systems, comprising at least one through-opening for the passage of a fluid and a rim that delimits the through-opening. The rim having a curved course and a rectilinear course that adjoins the curved course. A bead arrangement extends around the curved course and the rectilinear course. An edge portion spans the bead arrangement and the rim, so that the bead arrangement is situated at a distance from the rim. A cutout formed in the curved course, so that a minimum distance of the bead arrangement from the rim is smaller in the curved course than in the rectilinear course.

Separator plate with a homogenized bead strength in the port region

A bipolar plate assembly for a fuel cell or a fuel cell stack has at least a first flow field plate and a second flow field plate, wherein the first flow field plate and the second flow field plate are fastened on top of each other, wherein the bipolar plate assembly has a first area, in which an edge of the first flow field plate is flush with an edge of the second flow field plate, and has at least one second area, in which the edge of the first flow field plate is recessed from the edge of the second flow field plate. A fuel cell stack having such a bipolar plate assembly, as well as methods for manufacturing such a bipolar plate assembly or such a fuel cell stack are also provided.

Fuel cell stack and bipolar plate assembly

A separator plate assembly for an electrochemical system, comprising a first metal sheet and a second metal sheet, which are in contact with one another at least in areas along the flat sides thereof facing one another, the first metal sheet including a first through-hole, or a group of first through-holes, and a first embossed structure surrounding the first through-hole, or the group of first through-holes, of the first metal sheet, and the second metal sheet including a first embossed structure, which is arranged at least in sections in an area of the second metal sheet that is defined by a perpendicular projection of the first through-hole, or of the group of first through-holes, of the first metal sheet onto the second metal sheet.

Separator plate arrangement for an electrochemical system

The present disclosure relates to a separator plate for an electrochemical system, wherein the separator plate has, at least in some regions, periodic surface structures with a mean spatial period of less than 10 μm. The disclosure additionally relates to a method for producing a separator plate for an electrochemical system, comprising the steps: providing a separator plate; irradiating the separator plate by means of a pulsed laser, wherein a pulse duration of the laser pulses is less than 1 ns; and creating periodic surface structures on the separator plate by way of the laser radiation.

Separator plate with periodic surface structures in the nanometer to micrometer range

The disclosure relates to a bipolar plate for an electrochemical system, and to an electrochemical system comprising a plurality of bipolar plates. The electrochemical system may be, for example, a fuel cell system, an electrochemical compressor, a redox flow battery, or an electrolyser. The bipolar plate comprising separator plates, an inlet, and an outlet. A separator plate comprising an active region.

Bipolar plate with improved temperature distribution

The present disclosure relates to a sealing arrangement, comprising: an elastomeric sealing element, which comprises a foamed material containing microspheres, and a metal layer having a surface structuring, the surface structuring comprising a plurality of depressions, wherein the sealing element is configured as a coating of the metal layer and is arranged at least in some areas on the surface structuring, wherein a concentration of the microspheres in the sealing element, measured perpendicular to the surface of the metal layer, is inhomogeneous. The disclosure additionally relates to a plate assembly, to an electrochemical system, and to a method for producing the sealing arrangement.

Sealing arrangement, plate assembly, electrochemical system, and method for producing a sealing arrangement

An electrochemical arrangement with two metallic separator plates which each define a plate plane and which are stacked in a stack direction perpendicular to the plate planes. The separator plates comprise sealing elements which are embossed into the separator plate and which are supported against one another for sealing the electrochemical cell which is arranged between the separator plates and which are reversibly deformable in the stack direction up to a distance z. The arrangement further comprises at least one support element which is arranged between the separator plates and which is distanced to the sealing elements of the separator plates in a direction parallel to the plate planes.

Electrochemical arrangement and electrochemical system

A separator plate for an electrochemical system, comprising: at least one of the flanks of the bead assembly has a multiplicity of passages for directing a medium through the bead flank, and a distributing or collecting structure has a multiplicity of line ducts and a multiplicity of openings, wherein the line ducts adjoin the passages in the bead flank on an external side of the bead assembly, wherein the openings are disposed on a side of the distributing or collecting structure that faces away from the bead assembly and, are fluidically connected to a bead interior.

Separator plate for an electrochemical system

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.

Electrochemical system

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.

Metallic plate with at least one measuring structure and method of producing a metallic plate with at least one measuring structure

The present invention relates to a bipolar plate () for electrochemical systems which contains a first plate () with a first flowfield () for media distribution as well as a second plate () with a second flowfield () for media distribution. This first plate in the region of the first flow field at least in regions comprises a plane surface section () from which discrete projections () 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.

Bipolar plate and its use, as well as a method for its manufacture and an electrochemical system containing the bipolar plate

The present invention relates to a contact plate for fuel cells with a coherent active area () on at least one side of the contact plate, wherein the active area () consists of a contact surface () which over the whole surface comprises a coating () of an electrically conductive, corrosion-resistant material, and of recesses () so that the recesses () form a channel structure, wherein the coating () furthermore at least in the bottom regions () of the recesses () 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 ().

Contact plate for fuel cells

The present invention relates to a fuel cell arrangement, containing at least one bipolar plate layer () and an bonding partner&#x2014;preferably an membrane electrode assembly (MEA) (), wherein the bonding partner is bonded onto the bipolar plate layer () 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.

Fuel cell arrangement and method of manufacturing a fuel cell arrangement

The invention deals with an electrochemical system for compressing gases and/or for producing gases by electrolysis, consisting of an electrochemical compressor stack () having layering of several electrochemical cells, which are separated from one another in each case by bipolar plates ('), wherein the bipolar plates have openings for media supply and media discharge () for the electrochemical cells and the electrochemical cell stack can be placed under mechanical compressive strain in direction () of the layering. The bead arrangements (&#x2032;) are resilient and are provided at least in some regions to seal the openings () and/or an electrochemically active region () of the electrochemical cells.

Electrochemical system with fluid passage integrated within a sealing bead

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

Growing community of inventors

Ulm, Germany

Bernd Gaugler