BIPOLAR PLATE FOR A FUEL CELL UNIT

A bipolar plate () for a fuel cell unit comprising: a first plate (), a second plate (), wherein the first plate () and second plate are stacked on top of each other, a fluid opening () for supplying coolant to channels () of the bipolar plate () for coolant in an active region (), a fluid opening () for discharging coolant from channels () of the bipolar plate () for coolant in the active region (), channel structures () with the channels for fuel, oxidants and coolants in the active region (), wherein the channels for coolant are formed in the active region () between the first and second plate (), an outer bead () which is formed on an outer edge region () of the bipolar plate () and encloses the fluid opening () for supplying coolant and the fluid opening () for discharging coolant, a coolant supply bead () which encloses the fluid opening () for supplying coolant to channels of the bipolar plate () for coolant, a coolant discharge bead () which encloses the fluid opening () for discharging coolant from channels of the bipolar plate () for coolant, wherein a first fluid-conducting connection () from the coolant supply bead () into the outer bead () and a second fluid-conducting connection () from the outer bead () into the coolant discharge bead () are designed to remove conditioning fluid from the outer bead ().