Bipolar plate for an electrochemical cell, arrangement of electrochemical cells, and method for operating an arrangement of electrochemical cells

A bipolar plate (7) for an electrochemical cell (1), the bipolar plate (7) comprising

• at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19),
• wherein the first bead (15) and the second bead (19) are arranged opposite one another and form a channel (21),
• wherein the first bead (15) and the second bead (19) each comprise a central base surface (23) and at least two inclined surfaces (24) and the first bead (15) and/or the second bead (19) comprise at least one outer base surface (25),
• wherein the at least one outer base surface (25) and/or the central base surface (23) have at least one opening (27) for the passage of at least one medium (29), and
• wherein the channel (21) has a central plane (39) and, on at least one side of the central plane (39), the at least one opening (27) on the first bead (15) is arranged at a first distance (41) from the central plane (39) and a second distance (43) from an outer edge (45) of the central base surface (23) of the second bead (19) to the central plane (39) is at least as large as the first distance (41).

An arrangement (69) of electrochemical cells (1) comprising at least one bipolar plate (7), the bipolar plate (7) comprising

• at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19),
• wherein the first bead (15) and the second bead (19) are arranged opposite one another and form a channel (21),
• wherein the first bead (15) and the second bead (19) each comprise a central base surface (23) and at least two inclined surfaces (24) and the first bead (15) and/or the second bead (19) comprise at least one outer base surface (25),
• wherein the at least one outer base surface (25) and/or the central base surface (23) have at least one opening (27) for the passage of at least one medium (29),
• wherein the arrangement (69) comprises at least a first bipolar plate (7, 71), a second bipolar plate (7, 73), and a membrane-electrode assembly (4), the membrane-electrode assembly (4) is arranged between the first bipolar plate (7, 71) and the second bipolar plate (7, 73), and the central base surface (23) of the second bead (19) of the first bipolar plate (7, 71), the central base surface (23) of the first bead (15) of the second bipolar plate (7, 73), and the membrane-electrode arrangement (4) comprise a respective opening (27) and these openings (27) are aligned with one another.