Abstract: A method for producing a bipolar plate for a fuel cell having a membrane electrode assembly comprises providing a first fuel cell half-plate, which has a circumferential plate edge which has a first media channel offset inwardly from the plate edge and also a first flow field, providing a second fuel cell half-plate, which has a plate edge corresponding to the plate edge of the first fuel cell half-plate, and which has a second media channel offset inwardly from its plate edge and also a second flow field, the second media channel being aligned with the first media channel when the two fuel cell half-plates are stacked one above the other in perfect alignment, and joining the first fuel cell half-plate to the second fuel cell half-plate along a media-channel joint line framing the media channels, wherein a joint-line-free sealing region of the fuel cell half-plates borders the plate edges, on which a seal is fixed or is to be fixed, and the first fuel cell half-plate is joined to the second fuel cell half-pla

Abstract: A bipolar plate (100) for a fuel cell includes at least one profiled flow field (120) with at least two flow field channels (121, 122, 123, 124) and an associated inlet channel (111, 112, 113, 114) and an associated outlet channel (131, 132, 133, 134) for each of the flow field channels (121, 122, 123, 124). Here, different inlet channels (111, 112, 113, 114) are of different lengths, and different outlet channels (131, 132, 133, 134) are of different lengths. The bipolar plate (100) is characterized in that the inlet channels and/or the outlet channels (131, 132, 133, 134) are dimensioned in such a way that the pressure loss is equal via each channel which is composed of one of the flow field channels (121, 122, 123, 124), the associated inlet channel (111, 112, 113, 114) and the associated outlet channel (131, 132, 133, 134), as long as a predefined mass flow change takes place in each of the flow field channels (121, 122, 123, 124).

Abstract: A bipolar plate (100) for a fuel cell includes at least one profiled flow field (120) with at least two flow field channels (121, 122, 123, 124) and an associated inlet channel (111, 112, 113, 114) and an associated outlet channel (131, 132, 133, 134) for each of the flow field channels (121, 122, 123, 124). Here, different inlet channels (111, 112, 113, 114) are of different lengths, and different outlet channels (131, 132, 133, 134) are of different lengths. The bipolar plate (100) is characterized in that the inlet channels and/or the outlet channels (131, 132, 133, 134) are dimensioned in such a way that the pressure loss is equal via each channel which is composed of one of the flow field channels (121, 122, 123, 124), the associated inlet channel (111, 112, 113, 114) and the associated outlet channel (131, 132, 133, 134), as long as a predefined mass flow change takes place in each of the flow field channels (121, 122, 123, 124).