Separator plate, electrochemical cell and electrolyzer

Abstract

The present disclosure relates to a separator plate for an electrolyzer having a first layer with at least one through-opening for a fluid and an active region with a set of flow channels for the fluid. A first elastomeric molding with at least one sealing lip is arranged on a first side of the first layer at least partially surrounding the through-opening. The sealing lip extends at least partially along a peripheral edge of the through-opening. A second elastomeric molding surrounding the through-opening is arranged on a second side of the first layer, with a set of ribs which form grooves between them as flow channels for the fluid. For each flow channel, one longitudinal end is open to the through-opening and the other is open to the active region. The first layer has a cranked region at a distance from the through-opening and at least partially around the through-opening.

1 . A separator plate for an electrolyzer having a first layer, the first layer having a through-opening or a fluid and, adjacent to the through-opening, an active region with a set of flow channels for the fluid,
 wherein a first elastomeric molding with at least one sealing lip is arranged on a first side of the first layer at least partially surrounding the through-opening, which sealing lip extends at least partially along a peripheral edge of the through-opening, and   a second elastomeric molding is arranged on a second side of the first layer opposite the first side, surrounding the through-opening, with a set of ribs which in pairs form grooves between them as flow channels for the fluid, wherein for each flow channel a first longitudinal end is open to the through-opening and a second longitudinal end is open to the active region,   wherein the first layer has a cranked region at a distance from the through-opening and at least partially around the through-opening.   
     
     
         2 . The separator plate according to  claim 1 , wherein the cranked region extends at least partially along the peripheral edge of the through-opening and parallel to the peripheral edge of the through-opening, and/or at least partially transversely to the peripheral edge and perpendicular to the ribs of the second elastomeric molding, and/or at least partially along and parallel to the sealing lips of the first elastomeric molding. 
     
     
         3 . The separator plate according to  claim 1 , wherein the second elastomeric molding covers the cranked region on the second side at least partially. 
     
     
         4 . The separator plate according to  claim 1 , wherein the ribs of the second elastomeric molding extend at least partially and/or at least in a section in the direction of the active region up to the end of the second elastomeric molding. 
     
     
         5 . The separator plate according to  claim 1 , wherein the first elastomeric molding extends up to and into the cranked region and the first elastomeric molding merges evenly into a surface of the first side on the side of the cranked region facing away from the first elastomeric molding. 
     
     
         6 . The separator plate according to  claim 1 , wherein the first elastomeric molding and the second elastomeric molding are formed contiguously and are integrally injection-molded over the peripheral edge of the through-opening or through an opening in the separator plate. 
     
     
         7 . The separator plate according to  claim 6 , wherein the peripheral edge of the through-opening is completely coated and integrally injection-molded with the first elastomeric molding and the second elastomeric molding. 
     
     
         8 . The separator plate according to  claim 1 , wherein the first layer extends evenly in a region between the ribs of the second elastomeric molding and the active region. 
     
     
         9 . The separator plate according to  claim 8 , wherein an edge of the second elastomeric molding facing away from the through-opening is arranged at least partially in the region between the ribs of the second elastomeric molding and the active region. 
     
     
         10 . The separator plate according to  claim 1 , wherein for one, several or all of the ribs of the second elastomeric molding, an area of a cross-section of a rib of the set of ribs increases or decreases with increasing distance from the through-opening. 
     
     
         11 . An electrochemical cell for an electrolyzer having a first and a second cell frame and a separator plate which is arranged between the first and the second cell frame and has a first layer, wherein
 the first layer has a through-opening for a fluid and, adjacent to the through-opening, an active region with a set of flow channels for the fluid,   wherein a first elastomeric molding with at least one sealing lip is arranged on a first side of the first layer at least partially surrounding the through-opening, which sealing lip extends at least partially along a peripheral edge of the through-opening,   a second elastomeric molding is arranged on a second side of the first layer opposite the first side, surrounding the through-opening, with a set of ribs which in pairs form grooves between them as flow channels for the fluid, and   for each flow channel a first longitudinal end is open to the through-opening and a second longitudinal end is open to the active region.   
     
     
         12 . The electrochemical cell according to  claim 11 , wherein the first layer has an cranked region at a distance from the through-opening and at least partially around the through-opening. 
     
     
         13 . The electrochemical cell according to  claim 12 , wherein the cranked region extends at least partially along the peripheral edge of the through-opening and parallel to the peripheral edge of the through-opening, and/or at least partially transversely to the peripheral edge and perpendicular to the ribs of the second elastomeric molding, and/or at least partially along and parallel to the sealing lips of the first elastomeric molding. 
     
     
         14 . The electrochemical cell according to  claim 12 , wherein the second elastomeric molding covers the cranked region on the second side at least partially. 
     
     
         15 . The electrochemical cell according to  claim 11 , wherein the first elastomeric molding merges evenly into a surface of the first side on a side of the cranked region facing away from the first elastomeric molding. 
     
     
         16 . The electrochemical cell according to  claim 11 , wherein the peripheral edge of the through-opening is completely coated and integrally injection-molded with the first elastomeric molding and the second elastomeric molding. 
     
     
         17 . The electrochemical cell according to  claim 11 , wherein an edge of the second elastomeric molding facing away from the through-opening is arranged at least partially in a region between the ribs of the second elastomeric molding and the active region. 
     
     
         18 . The electrochemical cell according to  claim 11 , wherein for one, several or all of the ribs of the second elastomeric molding, an area of a cross-section of a rib of the set of ribs increases or decreases with increasing distance from the through-opening. 
     
     
         19 . The electrolyzer comprising a plurality of separator plates according to  claim 1 . 
     
     
         20 . The electrolyzer comprising a plurality of electrochemical cells according to  claim 11 .