Fuel cell comprising: - At least two groups of electrochemical cells each having an inlet and an outlet capable of receiving a fluid, and - A fluid circuit intended to guide said fluid and comprising, for each group : • a fluid supply line connected to the inlet of the group in question, said fluid supply line comprising an inlet switch configured to enable or block a flow of said fluid, • a fluid discharge line connected to the outlet of the group in question, each fluid supply line being connected to a main support conduit common to the groups and each fluid discharge line being connected to a main discharge line common to the groups , said main discharge conduit comprising at least one outlet switch configured to enable or block the flow of the fluid, the fluid circuit further comprising, for each group , a recirculation line configured to put the inlet and the outlet of the group in question in fluid communication, said recirculation line comprising a recirculation switch 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 of electrochemical cells each having an inlet and an outlet capable of receiving a fluid, and - A fluid circuit intended to guide said fluid and comprising, for each group : • a fluid supply line connected to the inlet of the group in question, said fluid supply line comprising an inlet switch configured to enable or block a flow of said fluid, • a fluid discharge line connected to the outlet of the group in question, • a fluid supply line connected to the inlet of the group in question, said fluid supply line comprising an inlet switch configured to enable or block a flow of said fluid, • a fluid discharge line connected to the outlet of the group in question, each fluid supply line being connected to a main support conduit common to the groups and each fluid discharge line being connected to a main discharge line common to the groups , said main discharge conduit comprising at least one outlet switch configured to enable or block the flow of the fluid, the fluid circuit further comprising, for each group , a recirculation line configured to put the inlet and the outlet of the group in question in fluid communication, said recirculation line comprising a recirculation switch 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. <EOS>