| 摘要 |
PURPOSE:To enhance the performance of a fuel cell and lengthen the life thereof, by providing a flow rate distribution orifice in a coupling metal located upstream as to the direction of passage of cooling water in an insulated coupling, and by performing electric connection so that the potential of the coupling metal provided with the orifice is lower than that of another coupling 27a comprises an anode and an cathode. CONSTITUTION:An insulated coupling 27a comprises an anode and an cathode meals 34, 35 and an insulation TEflon tube 33 connecting both the metals to each other. A flow rate distribution orifice for improving the balance of flow rates is provided in the anode metal 34 located upstream as to the direction of passage of cooling water in the insulated coupling 27a. Another insulated coupling 27b similarly comprises an anode and a cathode metals 34, 35 and an insulation Teflon tube 33 but is provided with no flow rate distribution orifice. Since the potential of the anode metal 34 provided with the orifice is lower than that of the cathode metal 35 provided with no orifice, a corrosion product does not clinging in the orifice. This results in preventing local overheating due to the decrease in the flow rate of the cooling water, to enable the very-efficient and stable operation of a fuel cell. |
