CHARGE/DISCHARGE SYSTEM AND METHOD FOR DRYING CHARGE/DISCHARGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To maintain the performance of a reversible cell for a long time in a charge/discharge system using a reversible cell of solid polymer type having a water electrolysis function and a fuel function.SOLUTION: In a cell stack 2 having a plurality of reversible cells 10, there are provided a port A and a port B leading to the flow path of a reaction fluid on an oxygen generation electrode side during water electrolysis and a port C and a port D leading to the flow path of a reaction fluid on a hydrogen generation electrode side. The port A is set at a raw water supply port during water electrolysis operation, and at a hydrogen exhaust port during fuel cell operation; the port B is set at a raw water supply and pure oxygen exhaust port during water electrolysis operation, and at a hydrogen supply port during fuel cell operation; the port C is set at a hydrogen exhaust port during water electrolysis operation, and at an oxidant and generated water discharge port during fuel cell operation; and the port D is set at an oxidant supply port during fuel cell operation. To the oxygen generation electrode during water electrolysis operation is supplied hydrogen during fuel cell operation; and, to the hydrogen generation electrode during water electrolysis operation is supplied air during fuel cell operation.