Abstract: In order to provide a bipolar plate for a fuel cell unit, by which an optimized supply and/or evacuation of a fluid medium to and/or from a membrane-electrode unit is achieved, it is proposed that, on a bipolar plate body, multiple flow channels are configured, which form at least one flow field for a fluid medium, a bypass channel is formed between an edge flange and a delimiting device, and at least one passage is configured, whereby a fluidic connection is provided between the flow field and the bypass channel, wherein at least one interference element is provided in the bypass channel, which forms an overflow region for the fluid medium.

Abstract: In order to create a bipolar plate for an electrochemical unit of an electrochemical device comprising a plurality of electrochemical units that follow one another along a stack direction, wherein the bipolar plate comprises the following: at least one medium passage opening, which forms a constituent part of a medium channel that extends along the stack direction through the electrochemical device; a sealing bead, which extends around the medium passage opening; a plurality of medium inlets, which are arranged on an inner side of the sealing bead facing toward the medium passage opening and which enable medium to flow into an interior space of the sealing bead; and a plurality of medium outlets, which are arranged on an outer side of the sealing bead facing away from the medium passage opening and which enable medium to flow out of the interior space of the sealing bead, in which bipolar plate the pressure loss that occurs when the medium flows from the medium passage opening through the medium inlets, t