BATTERY SEALING STRUCTURE, ELECTROLYTE CIRCULATION TYPE BATTERY CELL FRAME, ELECTROLYTE CIRCULATION TYPE BATTERY CELL STACK, AND ELECTROLYTE CIRCULATION TYPE BATTERY

摘要

Provided are a battery sealing structure excellent in assemblability, a cell frame for a redox flow cell equipped with this battery sealing structure, a cell stack for a redox flow cell, and a redox flow cell. A cell frame (10) comprises a battery plate-shaped member (bipolar plate) (11), a pair of frames (12a, 12b) for pressing and sandwiching a peripheral portion of the bipolar plate (11) from front and back, and a ring-shaped packing (20) formed of an elastic material. A ring-shaped groove (14) for housing the peripheral portion of the bipolar plate (11) between the mutually facing surfaces is formed on the frames (12a, 12b). The packing (20) is attached to the peripheral portion of the bipolar plate (11), is disposed in the ring-shaped groove (14), and is pressed between the frames (12a, 12b) and the peripheral portion of the bipolar plate (11) and contacts therewith. The packing (20) has a pair of leg portions (21) for holding the peripheral portion of the bipolar plate (11) therebetween and a base portion (22) for connecting these leg portions (21). The above configuration forms the battery sealing structure for sealing the space formed inside the opening of each of the frames (12a, 12b).