Fuel cell comprising: - At least two groups (1, 2, 3) of electrochemical cells each having an inlet (11, 21, 31) and an outlet (12, 22, 32) capable of receiving a fluid, and - A fluid circuit intended to guide said fluid and comprising, for each group (1, 2, 3): • a fluid supply line (14, 24, 34) connected to the inlet (11, 21,31) of the group in question, said fluid supply line (14, 24, 34) comprising an inlet switch (141, 241, 341) configured to enable or block a flow of said fluid, • a fluid discharge line (15, 25, 35) connected to the outlet (12, 22,32) of the group (1, 2, 3) in question, each fluid supply line (14, 24, 34) being connected to a main support conduit common to the groups (1, 2, 3) and each fluid discharge line (15, 25, 35) being connected to a main discharge line common to the groups (1, 2, 3), said main discharge conduit comprising at least one outlet switch (51, 52) configured to enable or block the flow of the fluid, the fluid circuit further comprising, for each group (1, 2, 3), a recirculation line (16, 26, 36) configured to put the inlet (11, 21, 31) and the outlet (12, 22, 32) of the group (1, 2, 3) in question in fluid communication, said recirculation line (16, 26, 36) comprising a recirculation switch (161, 261, 361) configured to enable or block the flow of the fluid, the inlet, outlet and recirculation switches of the fluid circuit being configured to enable, during a regeneration phase of a given group, a supplying of the given group from a recirculation line of said given group and of a fluid discharge line of at least one other group, said fuel cell being characterised in that the fluid has a first direction of flow in the given group, during the regeneration phase of said given group, and a second direction of flow in the given group, during a nominal production phase of said given group, the first direction of flow being opposite the second direction of flow and the nominal production phase being distinct from the regeneration phase. - At least two groups (1, 2, 3) of electrochemical cells each having an inlet (11, 21, 31) and an outlet (12, 22, 32) capable of receiving a fluid, and - A fluid circuit intended to guide said fluid and comprising, for each group (1, 2, 3): • a fluid supply line (14, 24, 34) connected to the inlet (11, 21,31) of the group in question, said fluid supply line (14, 24, 34) comprising an inlet switch (141, 241, 341) configured to enable or block a flow of said fluid, • a fluid discharge line (15, 25, 35) connected to the outlet (12, 22,32) of the group (1, 2, 3) in question, • a fluid supply line (14, 24, 34) connected to the inlet (11, 21,31) of the group in question, said fluid supply line (14, 24, 34) comprising an inlet switch (141, 241, 341) configured to enable or block a flow of said fluid, • a fluid discharge line (15, 25, 35) connected to the outlet (12, 22,32) of the group (1, 2, 3) in question, each fluid supply line (14, 24, 34) being connected to a main support conduit common to the groups (1, 2, 3) and each fluid discharge line (15, 25, 35) being connected to a main discharge line common to the groups (1, 2, 3), said main discharge conduit comprising at least one outlet switch (51, 52) configured to enable or block the flow of the fluid, the fluid circuit further comprising, for each group (1, 2, 3), a recirculation line (16, 26, 36) configured to put the inlet (11, 21, 31) and the outlet (12, 22, 32) of the group (1, 2, 3) in question in fluid communication, said recirculation line (16, 26, 36) comprising a recirculation switch (161, 261, 361) configured to enable or block the flow of the fluid, the inlet, outlet and recirculation switches of the fluid circuit being configured to enable, during a regeneration phase of a given group, a supplying of the given group from a recirculation line of said given group and of a fluid discharge line of at least one other group, said fuel cell being characterised in that the fluid has a first direction of flow in the given group, during the regeneration phase of said given group, and a second direction of flow in the given group, during a nominal production phase of said given group, the first direction of flow being opposite the second direction of flow and the nominal production phase being distinct from the regeneration phase.