Abstract: The present disclosure relates to a bipolar plate for an electrochemical system, having a first separator plate and a second separator plate that are arranged one on top of the other, wherein the first separator plate has, on a side facing away from the second separator plate, a first electrochemically active surface for conducting a first fluid; the second separator plate has, on a side facing away from the first separator plate, a second electrochemically active surface for conducting a second fluid; wherein the first electrochemically active surface and the second electrochemically active surface overlap each other and form an active region of the bipolar plate in an overlapping region, wherein the separator plates are joined together in the active region by a weld pattern with inhomogeneously distributed welds.

Abstract: The present disclosure relates to a separator plate for an electrochemical system, comprising first and second individual plates connected by means of a welded joint, each individual plate comprising at least one through-opening for passage of a fluid, a flow field, a distribution or collecting region which fluidically connects the through-opening to the flow field, and a transition region which is arranged between the flow field and the distribution or collecting region, wherein the welded joint is arranged in the flow field and/or in the transition region, wherein the welded joint extends longitudinally from a first end located in a first end region to a second end located in a second end region, wherein the welded joint forms an end crater between the first and second ends and the end crater is spaced from the first and second ends.

Abstract: The present disclosure relates to a separator plate for an electrochemical system, comprising a first plate and a second plate connected at a contact zone. The first plate comprises two first channels for conducting media, which run next to one another and are separated at least in sections by a web formed between the first channels. The second plate comprises a second channel for conducting media. The web formed between the first channels is lower in the crossing region of the second channel such that the first channels running on either side of the web are fluidically connected by a lower portion of the web. In or near the lower portion, the first plate is connected to the base of the second channel by a welded joint. The welded joint forms an end crater spaced away from a first end and a second end of the welded joint.

Abstract: A plate assembly for an electrochemical system, comprising an end plate, a first separator plate which adjoins the end plate and which has a plate plane, a second separator plate which adjoins the first separator plate, the second separator plate having at least one media-guiding second through-opening, wherein an orthogonal projection of the second through-opening onto the first separator plate perpendicular to the plate plane defines a projection area, wherein the first separator plate has in the region of the projection area no through-opening or a first through-opening, the area of which is less than 20% of the area of the second through-opening.

Abstract: The present disclosure relates to a bipolar plate for an electrochemical system, comprising two separator plates which are connected to one another, at least one of the separator plates having a plate body and at least one tab which is formed in one piece with the plate body and can be separated from the plate body via a predetermined breaking point. The disclosure additionally relates to a retention sample for a bipolar plate or flow plate, to a flow plate, to a system, and to a method for producing and testing a bipolar plate or flow plate.

Abstract: A separator plate for an electrochemical system and a bipolar plate comprising two such separator plates for an electrochemical system. An electrochemical system comprising at least two separator plates and/or one bipolar plate. A separator plate comprising: at least one sealing bead for sealing off a region of the separator plate and at least one load relief bead which relieves load on the sealing bead, the load relief bead arranged spaced apart from the sealing bead, and, in a cross-section perpendicular to the course of the load relief bead, at least in a non-compressed state of the separator plate, at least one bead flank of the load relief bead comprises, in at least a first segment along the direction of extension, at least a first, outer portion and a second, inner portion which are at different positive angles to the separator plate plane.

Abstract: An assembly for an electrochemical system, which comprises a first separator plate, a second separator plate, and a membrane electrode assembly arranged between the separator plates for forming an electrochemical cell between the separator plates. A stack comprising a plurality of such assemblies, and an electrochemical system comprising a plurality of such assemblies and/or a stack. The electrochemical system may be a fuel cell system, an electrochemical compressor, an electrolyzer, a redox flow battery, or a humidifier for an electrochemical system.

Abstract: A separator plate for an electrochemical system. The separator plate having a shock absorber arrangement. A bipolar plate comprising two separator plates for an electrochemical system, each having a shock absorber arrangement. An electrochemical cell comprising two separator plates for an electrochemical system, each having a shock absorber arrangement. An assembly for an electrochemical system, comprising at least one separator plate and a membrane electrode assembly (MEA). The electrochemical system may be a fuel cell system, an electrochemical compressor, a redox flow battery, or an electrolyser.

Abstract: An assembly for an electrochemical system, comprising a separator plate with at least one layer and a membrane electrode assembly, MEA, the MEA having: an electrochemically active region, a frame-like reinforcing layer surrounding the electrochemically active region, and at least one tab for positioning the MEA relative to the separator plate and/or for fastening the MEA to the separator plate, wherein the layer has a first flat side and a second flat side opposite the first flat side, wherein the tab is connected at one side to the frame-like reinforcing layer and its free end is arranged on the side of the second flat side of the layer, wherein the frame-like reinforcing layer is arranged on the first flat side of the layer.

Abstract: The present disclosure relates to a separator plate for an electrochemical system, comprising a first individual plate and a second individual plate connected to the first individual plate, wherein channels of the individual plates are nested in each other. The present disclosure also relates to an arrangement for an electrochemical system, comprising a plurality of separator plates.

Abstract: A separator plate for an electrochemical system comprising a first individual plate which comprises two first channels for conducting media which run next to one another and which are separated from one another at least in sections by a web formed between the first channels. The web comprising a lowered portion and a rear side of the base of the lowered portion is connected to a rear side of the base of the second channel in the contact zone of the individual plates via a welded connection. The welded connection comprises a first end region and a first curved portion, wherein the first curved portion runs, and is curved, in such a way that a virtual straight line running perpendicularly through the first end region intersects the welded connection at least two times.

Abstract: 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.

Abstract: A separator plate for an electrochemical system, a bipolar plate comprising two such separator plates, an electrochemical cell, and an electrochemical system comprising a multiplicity of such separator plates or bipolar plates are disclosed. By way of example, the electrochemical system may be a fuel cell system, an electrochemical compressor, a redox flow battery or an electrolyzer. The separator plate for an electrochemical system, comprising at least one through-opening and at least one bead arrangement. An edge portion stretches between the at least one bead arrangement and a border of the at least one bead arrangement. The edge portion has recesses and projections starting from the border and alternating successively along a border contour in some portions, wherein the recesses project downwards out of the plate plane and the projections project upwards out of the plate plane.

Abstract: A bipolar plate for an electrochemical system, comprising a first separator plate and a second separator plate. The first and the second separator plate each comprising: at least two through-openings, an active region, and a distribution or collection region with structures for guiding a reaction medium between one of the through-openings and the active region. The structures for guiding the reaction medium in the distribution or collection region comprise flow channels for the respective reaction medium, said flow channels being separated from each other by webs. Adjacent to the first through-opening, the separator plates bear directly against each other in a contact plane. The distribution or collection region of the first separator plate and/or the distribution or collection region of the second separator plate have at least one compensating region.

Abstract: An assembly for an electrochemical system comprising a separator plate and a support element is disclosed. The separator plate is designed as a single layer and as a stack terminating plate. The electrochemical system may be a fuel cell system, an electrochemical compressor, an electrolyzer, a humidifier for an electrochemical system, or a redox flow battery.

Abstract: Electrochemical systems, separator plates and methods for production thereof, the separator plate comprising: an active region and at least one first through-opening for supplying a reaction medium to flow channels, and one second through-opening for conducting the reaction medium away from flow channels. At least one through-opening enclosed by a roller-embossed sealing bead. Roller embossing a first layer in a first transportation direction and roller embossing a second layer in a second transportation direction, and arranging the two metal layers opposite one another relative to the respective transportation directions. Two roller-embossed sealing beads are arranged one above the other.

Abstract: A separator plate comprising a first individual plate and a second individual plate, wherein the separator plate comprises: an electrochemically active region, at least one through-opening, and a bead arrangement. The bead arrangement arranged around the through-opening for sealing off the through-opening, A bead interior fluidically connected to the through-opening. At least one first aperture extending substantially parallel to a plate plane defined by the separator plate. At least one conveying channel which opens into a region of the first individual plate containing the first aperture and fluidically connects the bead interior to the first aperture.

Abstract: The present document relates to a cell for an electrochemical system, comprising two separator plates, a membrane electrode assembly (MEA) arranged between the separator plates, and at least one flexible electrical cable for tapping off an electrical voltage. The separator plates, the MEA and the cable can be compressed with one another, the flexible cable has a first end portion and a second end portion, the first end portion is arranged for fastening between the separator plates, and the second end portion protrudes laterally from the cell.

Abstract: A flow plate for a humidifier, having flow fields on both mutually opposite flat sides of the flow plate is described. The flow plate proposed here has a multiplicity of through-openings, wherein the through-openings are designed such that a perpendicular projection of the through openings onto a plane oriented parallel to the plane of the flat surface of the flow plate has a non-vanishing area, so that gas passing through the through-openings effects, at least in part, mixing of a gas guided in the flow fields perpendicular to the plane of the flat surface of the flow plate. The through-openings improve the power of the humidifier, thus permitting a lower number of flow plates and therefore a more lightweight and more compact design.

Abstract: An electrochemical, media-guiding system, a contact element for electrically and mechanically contacting such a plate, and a transmission device containing such a contact element. The present disclosure further relates to the production of such a plate or such a contact element. A plate having at least one contact point forming a voltage take-off point, a current supply point, and/or a current take-off point. The at least one contact point having a laser-surface-treated region.