CELL STACK OF REDOX FLOW BATTERY

摘要

The present invention relates to a cell stack of a redox flow battery in which an inner cell unit is stacked, end cell units are stacked on both surfaces of the stacked inner cell unit, and a membrane is provided between the cell units. The inner cell unit includes: a flow path frame; a bipolar plate provided in an electrode chamber in the flow path frame; and a pair of electrodes stacked on both surfaces of the bipolar plate. The end cell unit includes: an end frame; a bipolar plate provided on an outer surface of an electrode chamber of the end frame; an electrode stacked on an inner surface of the bipolar plate; an insulation plate insulating an outer surface of the bipolar plate; and a collector plate provided with a terminal portion in surface contact with the bipolar plate and protruding from the insulation plate. The collector plate is formed such that a connection portion in surface contact with the bipolar plate does not have a region superposed on the electrode chamber.