Stack improves for fuel cell for the establishment of a homogeneous flow

bipolar plate (1) for making a stack of a fuel cell, said bipolar plate (1) comprising flow channels for a first and a second fuel cell reagent (A, B), as well as a heat transfer fluid (C), the flow channels (a, B, C) extending in a longitudinal direction of the plate (1), so that each flow channel for a reagent (a, B) flanked by two heat transfer fluid circulation channels (C), the flow channels (A, B, C) being configured to generate losses of variable loads according to the channel position in the transverse direction of the plate (1), of so as to establish an even flow of reagents (a, B) on the entire plate (1) and a homogeneous flow of heat transfer fluid (C) on all of the plate (1).