Bipolar plate and fuel cell stack

A bipolar plate (10) for a fuel cell stack (100), the bipolar plate (10) having a main extension plane (HE) and a main flow direction (HR) on the main extension plane (HE), a first bipolar plate half (12), a second bipolar plate half (14), an active field (40), a distribution region (50), and a port region (60),

• wherein the port region (60) has at least one port for supplying at least one fluid (F) onto the main extension plane (HE),
• wherein the active field (40) has at least one cooling fluid channel structure (42) for a cooling process using a cooling fluid (KF) and at least one fuel channel structure (44) for supplying at least one fluid (F) to at least one adjacent membrane electrode assembly (110) of the fuel cell stack (100),
• wherein the cooling fluid (KF) flows through the at least one cooling fluid channel structure (42) in the main flow direction (HR), wherein the at least one fluid (F) flows through the at least one fluid channel (44) in the main flow direction (HR), and
• wherein
• the first bipolar plate half (12) and the second bipolar plate half (14) form at least one distribution channel structure (52) in the distribution region (50), wherein the distribution channel structure (52) is configured such that the cooling fluid (KF) flows through the distribution channel structure (52) in a direction orthogonal to the main flow direction (HR) on the main extension plane (HE), wherein a thickness (D1) of the bipolar plate (10) in the distribution region (50) is greater than a greatest thickness (D2) of the bipolar plate (10) in the active field (40).