| 摘要 |
A bipolar plate for a fuel cell is provided to allow humidification of fuel to be supplied to a fuel cell stack without using a separate humidifier, and to prevent a flooding phenomenon. A bipolar plate(S1) coupled to a membrane-electrode assembly, serving as flow paths for fuel, cooling water and air and supporting the membrane-electrode assembly, is formed of a main bipolar plate(200) and a sub-bipolar plate(300), and includes: a plurality of suction manifolds(116,128) and discharge manifolds(118,126) perforated at both ends of the longitudinal direction of the main bipolar plate and the sub-bipolar plate for sucking and discharging fuel; a plurality of flow paths formed on the top surface of the main bipolar plate, receiving fuel from different suction manifolds and discharging the fuel to different discharge manifolds so that both fuel flow directions are opposite to each other; and supplementary flow paths formed on the bottom surface of the main bipolar plate and on the top and bottom surfaces of the sub-bipolar plate to link the suction manifolds and the discharge manifolds to the flow paths. |
