Reinz-Dichtungs-GmbH

The present disclosure relates to a separator plate separator plate for an electrochemical system, comprising a bead arrangement and at least one conduit channel for directing a fluid, wherein the conduit channel connects to the bead arrangement and is fluidically connected to a bead interior of the bead arrangement, and has a channel roof, a channel base and two channel flanks extending between the channel roof and the channel base, wherein a base width of the channel base, determined parallel to the plane of the separator plate, increases towards the bead arrangement at least in a section of the conduit channel, while a channel roof width of the channel roof, determined parallel to the plane of the separator plate, decreases towards the bead arrangement in said section, so that a cross-sectional shape of the conduit channel changes.

The present disclosure relates to an electrochemical cell arrangement for an electrolyzer. Also disclosed is a method of manufacturing an electrochemical cell arrangement. The electrochemical cell arrangement may comprise separator plates, gas diffusion layers and a membrane and additionally at least one separating layer, that may consist of a structurally rigid material like metal, which is coated with a plastic layer. The separating layer may have a recess and adjoining to the recess a metal ridge.

A metal separator plate for an electrochemical system, having at least a first laser-surface-treated region with a first passivation layer and a second region with a native or reconstructed passivation layer, wherein, as a result of the laser surface treatment, the first passivation layer has: a charge carrier density that is increased by at least 10%, and a surface area that is no more than 5% larger in relation to the native or reconstructed passivation layer. The present disclosure further relates to methods for producing and characterizing such a separator plate.

The present disclosure relates to a separator plate for an electrolyser, comprising a metal layer which has a surface structuring in sections, and an elastomer coating designed as a sealing element and applied to the metal layer for sealing at least one region of the separator plate. The surface structuring comprises a plurality of channel-shaped depressions produced by laser surface treatment. The elastomer coating is arranged at least in some regions on the surface structuring. The present disclosure additionally relates to a method for manufacturing the separator plate.

A bipolar plate for an electrochemical system. The bipolar plate comprising a first individual plate and a second individual plate which are joined together. Each individual plate comprising: an electrochemically active region, an outer edge, and a perimeter sealing element. The outer edge region spans between the edge of the perimeter sealing element and the outer edge. Some embodiments of the outer edges protrude out of a plate plane defined by the bipolar plate. A plurality of stiffening structures stiffening the outer edge region of the bipolar plate.

The present invention relates to a sealing layer for use in an electrolyzer, a separator plate therefor and an electrolyzer. The sealing layer has at least one sealing bead, which, when installed in the stack, in plan view of the sealing layer runs around the flow field of the separator plate in a self-contained manner and has an initial bead height H 0 determined before the first compression in the stack, wherein after an initial one-time compression of the sealing layer under nominal compression in the assembled, ready-to-use state of the stack and subsequent disassembly of the stack, the self-contained sealing bead has a bead height H where H≤0.3 H 0 .

The present disclosure relates to a bipolar plate for an electrochemical system and an electrochemical system comprising a stacked plurality of such bipolar plates as well as a method for the production of such bipolar plates. The electrochemical system may be a fuel cell system, an electrochemical compressor, an electrolyzer, or a redox flow battery. The bipolar plate comprises a first separator plate and a second separator plate connected to each other which delimit an inner space. Each separator plate has an inner side with an inner coating and an outer side with an outer coating. Fluid guide structures are molded into an electrochemically active region of each separator plate by shaping of the respective separator plate. The inner coating extends along the electrochemically active region and has defects at least in some regions. The outer coating extends along the electrochemically active region and has a substantially uniform surface texture.

Electrochemical systems comprising separator plates and the separator plates comprising a first individual plate and a second individual plate. The individual plate comprising: an electrochemically active region, at least one through-opening and a sealing bead. Conveying channels adjoin a bead flank of the sealing bead and the conveying channels connecting the through-opening and the sealing bead interior. A plurality of first weld sections connecting the two individual plates and the first weld sections extend in the direction of the first conveying channels and arranged between the first conveying channels.

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.

The present disclosure relates to a separator plate for an electrochemical system. The electrochemical system may be, for example, a fuel cell system, an electrochemical compressor, or an electrolyzer.