FABRICATION METHOD FOR LAMINATED-TYPE SECONDARY BATTERY

摘要

A compressed air is ejected from air ejector ports (14) to between a mold surface defining cavity (12) of mold (7) and a surface of a hot melt resin layer after starting to fill or inject the hot melt resin material into cavity (12) and before a temperature of the hot melt resin material becomes equal to or lower than a softening point thereof. Recesses (Q) are formed by positively generating a “sink mark” on a surface of edge protector (6) by ejection of the compressed air, and at the same time, gap (G) is formed between the surface of edge protector (6) and the mold surface. As a result, when bead-shaped edge protector (6) is integrally formed in long-side heat-fused portions (5c) of laminated-film exterior package case (5) by using a thermoplastic hot melt resin material, mold releasability of the molded edge protector from the mold can be enhanced.

主权项

1. A method for fabricating a laminate-type secondary battery, comprising:
setting a laminated-film exterior package member as an insert in a mold, the laminated-film exterior package member accommodating cell elements; and integrally forming a bead-shaped edge protector in a peripheral edge of the laminated-film exterior package member by molding a hot melt resin material such that the hot melt resin material surrounds an end edge of the laminated-film exterior package member and both opposite surfaces of the laminated-film exterior package member in a vicinity of the end edge, wherein a compressed air is introduced between a mold surface defining a cavity of the mold and a surface of a hot melt resin layer formed of the hot melt resin material after starting to fill or inject the hot melt resin material into the cavity and before a temperature of the hot melt resin material becomes equal to or lower than a softening point thereof.