| 摘要 |
A lead terminal (2) on the positive electrode side and upper and lower laminated films (4a, 4b) that becomes a laminated film outer packaging body (4) are pressurized and constrained by upper and lower welding jigs (9, 10) and thermally welded by impulse heaters (13) of the respective welding jigs (9, 10). A heat insulating material (15) is provided in a portion located on the rear surface side of each of the heaters (13) and corresponding to the lead terminal (2), thereby preventing heat from escaping to the side of a jig main body (11) to keep the temperature of a thermal welding region in the portion corresponding to the lead terminal (2) relatively high. This makes it possible to make the welding temperature uniform at a side portion of the laminated films (4a, 4b), from which the lead terminal (2) is led out, and thereby prevent the occurrence of a thermal welding failure. |
