Water removal channel for manifolds of PEM fuel cell stacks

It is disclosed a Biopolarplatte for a fuel cell having a first unipolar plate having an active surface with a plurality of flow field channels formed therein. The first unipolar plate further comprises an inlet manifold which is arranged at a first end of the unipolar plate and is in communication with the active area, and an exhaust manifold, which is arranged at a second end of the unipolar plate and a discharge opening therethrough shaped possesses. A peripheral edge of the discharge opening is bevelled and is also in communication with the active area. The tapered discharge orifice forms a water removal channel in the bipolar plate. It is also a fuel cell stack comprising the bipolar plate is disclosed.