BIPOLAR PLATE WITH INSERTABLE DIAPHRAGM AND FUEL CELL STACK

A bipolar plate for a fuel cell comprises an active region and an edge region surrounding the active region, the edge region being associated to a first media guide fluidically connected to a first passage and a second media guide fluidically connected to a second passage, as well as having a media duct which runs through the active region and fluidically connects the first passage to the second passage. At least one of the media guides comprises a first partial chamber and a second partial chamber having the passage. A flow cross-section of the media guide is tapered between the first partial chamber and the second partial chamber., and a diaphragm can be inserted or is inserted into the second partial chamber.