A bipolar plate (1) comprising on the first face a groove forming a first distribution channel (111) for one of the gases, comprising on the second face a groove forming a second distribution channel for the other of the gases, comprising in its thickness an inner channel (122) for the circulation of a coolant, said plate being formed from a structural support having a surface that does not conduct electricity and that is chemically inert, said plate comprising pins (10) that pass through the whole thickness and that emerge on both sides through each of said first and second faces in the working section, said pins being spread over the entire working section of said plate.