Assembling method for battery outer case for receiving a flat battery pack joined by seam-rolling

摘要

An assembling method for a battery outer case including the steps of: molding a metal container main body with notched holes formed beforehand in its body portion for exposing terminals connected to a flat battery pack; receiving a flat battery pack in the metal container main body while fitting the terminals into the notched holes; covering the metal container main body with a metal lid; and superposing an open end portion of a metal container main body and an end portion of the metal lid with each other thereby to join them to each other by double seaming.

主权项

1. An assembling method for a battery outer case comprising the steps of:
molding a metal container main body including a body portion of a polygonal cylindrical configuration and a plate portion which closes an end of the body portion, said body portion having notched holes, each notched hole including a pair of side edge portions that extend linearly and in parallel from the open end portion of the body portion toward end corners of the notched hole near the plate portion, an end edge portion connected between corresponding ends of the side edge portions, and reinforcement portions, so as to form said notched holes having peripheral reinforcement portions, the reinforcement portions are more rigid than remaining portions of said body portion of said metal container main body and are formed beforehand in said body portion for exposing terminals connected to a flat battery pack; receiving said flat battery pack in said metal container main body while fitting said terminals into said notched holes; covering said metal container main body with a metal lid; and superposing an open end portion of said body portion of said metal container main body divided by the notched holes and an end portion of said metal lid with each other thereby to join them to each other by pressing a seam roll against said respective end portions from a side thereof.