FLAT WOUND GROUP MANUFACTURING METHOD AND WINDING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a flat wound group excellent in volumetric efficiency and having vibration resistance. SOLUTION: A hexagonal core material 2 is made by deforming a seamless cylinder in a shape to make contact with an outer periphery of a winding shaft by slipping it left and right by covering the winding shaft of a winding device with the stainless steel SUS 304 made seamless cylinder. A pole plate and a separator are wound so that a flat winding group 7A of a hexagonal flat shape is formed around the hexagonal core material 2. The flat wound group 10 is manufactured by crushing the flat winding group 7A with the hexagonal core material 2 from the upper side direction. The hexagonal core material 2 is crushed and becomes a plate type core material 2A making contact with no clearance, and an overall periphery of the plate type core material 2A is structured to adhere to the extreme inner periphery of the separator 4a. The plate type core material 2A is fixed inside of a battery.