CYLINDRICAL BATTERY CELL WITH NON-AQUEOUS ELECTROLYTE

PROBLEM TO BE SOLVED: To improve sealing performance of a secondary battery using nonaqueous electrolyte solution. SOLUTION: In a circular caulking space 65 of a battery container 60, a sealing lid 50 is caulked to be fixed via an insulation gasket 43 made of perfluoro-based fluororesin to seal an opening end part 60a of the battery container 60 as well as to have the sealing lid 50 and the battery container electrically insulated from each other. The opening end part 60a of the battery container 60 compresses the insulation gasket 43 so as to pressure-pinch both faces of a flange part 50F of the sealing lid 50 in a caulking process to have sealing faces formed on the both faces of the flange part 50F. An upper and a lower faces of the flange part 50F are in close contact with the insulation gasket 43, and at the same time, are pressed by an inner face of the battery container deformed by the caulking from up and down. The insulation gasket 43 has compression points 1A, 1B produced by compression force getting maximum at the upper and the lower faces of the flange part 50F to exhibit high water-sealing performance. That is, the compression points of the upper and the lower faces of the flange part 50F become seal points. COPYRIGHT: (C)2011,JPO&INPIT