Abstract: In order to improve the sealing between an elastomeric end frame (20) and the adjacent stack frame (3) of a cell stack (4) of a redox flow battery, it is provided that on the side of the recess (22) to receive a current collector (21) a first sealing element (25), which extends along the periphery of the end frame (20), is closed in the peripheral direction and protrudes from the first end face (24) of the end frame (20), is integrally molded on a first end face (24) of the end frame (20).

Abstract: For improving the energy efficiency of a cell of a redox flow battery it is desired that the electrolyte liquid flows to the greatest possible extent through the electrode and that there are no flow paths or leakages around the electrode. In order to achieve this, a frame of a cell of a redox flow battery is proposed, said frame having an opening 8 which is bordered by a rim 6, wherein on the rim 6, a first flow blocker 11 is arranged which extends into the opening 8, and a second flow blocker 16 is arranged in the distribution channel 9 in the region of the distribution channel's inflow region for supplying electrolyte liquid into the cell, or in the outflow region for discharging electrolyte liquid, wherein said flow blocker restricts the distribution channel 9 toward the opening 8.

Abstract: For improving the energy efficiency of a cell of a redox flow battery it is desired that the electrolyte liquid flows to the greatest possible extent through the electrode and that there are no flow paths or leakages around the electrode. In order to achieve this, a frame of a cell of a redox flow battery is proposed, said frame having an opening 8 which is bordered by a rim 6, wherein on the rim 6, a first flow blocker 11 is arranged which extends into the opening 8, and a second flow blocker 16 is arranged in the distribution channel 9 in the region of the distribution channel's inflow region for supplying electrolyte liquid into the cell, or in the outflow region for discharging electrolyte liquid, wherein said flow blocker restricts the distribution channel 9 toward the opening 8.