| 摘要 |
PURPOSE:To suppress the infiltration of moisture into a cell by enveloping a power generating element with a multi-layer outer packaging film, thermally sealing the periphery, and heating and pressurizing the sealed section to form rugged stripes. CONSTITUTION:A separator 7 is arranged between a negative electrode 5 made of lithium stuck to a nickel current collector plate 3 and a positive electrode black mix 6 coated on an aluminum current collector plate 4; a multi-layer outer packaging body 1 made with heat-depositing polyethylene films 1a, 1a', aluminum foils 1b, 1b', polyester films 1c, 1c' is folded into two and covered over them; and the periphery is thermally sealed. Next, the sealed section is further heated and pressurized with a mold to form rugged stripes 10, and finish- sealing is performed to form a flat type nonaqueous electrolyte cell. Accordingly, the infiltration of moisture into the cell is nearly completely suppressed, and the shelf life can be improved. |
