Method of manufacturing battery having polygonal case

Details Method of manufacturing battery having polygonal case Method of manufacturing battery having polygonal case

1996-03-06

1999-03-09

Maples, John S.

Metal working

Method of mechanical manufacture

Electrical device making

219 2164, H01M 204, B23K 2600

Patent

active

058794166

ABSTRACT:
A rectangular case of a battery has cover, which is inserted into an open end of the case with the peripheral edge thereof butted against an inner periphery of the case, forming an interface to be welded. In order to form an equal weld penetration depth, the welding of the corners of the weld interface and straight sides thereof is carried out differently. For example, when the corner of the weld interface is welded, the laser beam is aimed at a portion offset outside the corner of the weld interface while the laser beam is applied right on the weld interface when the straight side is welded. Each portion on the straight sides is, preferably, welded before the above main welding for temporary setting.

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