Laminated battery and manufacturing method therefor

A method of manufacturing a laminated battery having a power generation element having a cathode, an anode, and an electrolyte, and an outer structure formed by two laminated films each including an adhesive resin layer, the method comprising:

• a first step in which a depression that becomes a storage unit for the power generation element is formed through a drawing process and by pressing at least one of the laminated films with a pressing jig in which a through hole is formed;
• and
• a second step in which, after the power generation element is stored in the depression, a sealing section is formed at a periphery of the storage unit by joining the laminated films, wherein
• in the first step, a load applied at a portion proximate a corner of the through hole is set smaller than a load at the other portions when a load is applied to the pressing jig, to form a plurality of protrusions at a region, of a portion that becomes the sealing section, proximate a corner formed at a boundary with the depression, so that a thickness of the adhesive resin layer in a direction perpendicular to an adhesive surface of the adhesive layer at the region is set greater than a thickness of the adhesive resin layer in the direction perpendicular to the adhesive surface of the adhesive layer at the other regions and a portion of the adhesive layer having the greater thickness is formed to surround the corner,
• wherein the plurality of protrusions are formed on at least one of the laminated films,
• wherein each of the protrusions is formed in a string form from a side of the storage unit toward the outside.