| 摘要 |
PURPOSE:To effectively prevent the corrosion of the inner surface of a positive electrode can. CONSTITUTION:A positive collector 8, a positive electrode active substance 2, a separator 3 and a negative electrode active substance 4 are laminated together with non-aqueous electrolyte in the inner part of a flat positive electrode can 1, and the opening part of the positive electrode can 1 is enclosed with a negative electrode can 5 through a sealing gasket 6, wherein a corrosion preventive insulating film 7 having a slightly smaller area than that of the inner bottom surface of the positive electrode can 1 is provided therein. The positive electrode collector 8 covers the insulating film 7 and at the same time has an edge part extending beyond the end edge of the insulating film, and the edge part is electrically connected to the inner bottom surface of the positive electrode can 1 in plural places by spot-welding and the like, and the circumferential edge part of the positive electrode collector 8 and the end edge part of the insulating film 7 are press-fitted to the inner surface of the positive electrode can by the sealing gasket 6 through a hot melt bonding agent 9. |
