CELLS STACK FOR AN ELECTROCHEMICAL CELL, FUEL CELL SYSTEM AND ELECTROLYSIS CELL SYSTEM

The present invention concerns a cell stack for an electrochemical cell comprising a first cell comprising a first bipolar plate (1) comprising a first anode flow field (4) on a first surface (2) of the first bipolar plate (1), a second cell comprising a second bipolar plate (20) comprising a second anode flow field (23) on a first surface (21) of the second bipolar plate (20), the first anode flow field (4) comprising a plurality of parallel channels (5) providing flow paths for the fuel across the first anode flow field (4) from a first side (6) of the first anode flow field (4) to an opposite second side (7) of the first anode flow field (4), so that fuel flows along a first direction, the second anode flow field (23) comprising a plurality of parallel channels (24) providing flow paths for the fuel across the second anode flow field (23) from a first side (25) of the second anode flow field (23) to an opposite second side (26) of the second anode flow field (23), so that fuel flows along a second direction, wherein the first direction and the second direction are different.