THIN BATTERY AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a thin battery thinning in profile reduced in weight and enhanced in reliability. SOLUTION: This thin battery has a unit cell 2 and a multi-layered armor film 1. The unit cell 2 is constructed of a sheet-like positive electrode 2c and a sheet-like negative electrode 2b laminated and disposed through a sheet-like separator 2a having ion conductivity to the main surface of the sheet-like positive electrode 2c. The multi-layered outer film 1 derives external terminals 3 and 4 corresponding to the positive and negative electrodes 2c' and 2b' of the unit cell 2 and liquid-tightly seals the sealed part of the unit cell 2 by heat fusion of a heat-fusible resin layer 1a. In this case, the sealed part of the external terminals 3a and 4 is welded and sealed through at least the heat-fusible resin layer 1a having a thickness of 5μm on one side.