積層アルミニウム材の製造方法及びそれを含む密閉型電池の製造方法

摘要

The first embodiment of the present invention is a process for producing a stacked aluminum material by resistance-welding stacked aluminum foils to an aluminum plate, said process being characterized in that stacked aluminum foils are joined to an aluminum plate by: forming multiple small holes in the stacked aluminum foils in the stacking direction thereof along the lengthwise direction of a zone in which a weld is to be formed; and resistance-welding the resulting aluminum foils to the aluminum plate to form an elliptical nugget that spreads over the small holes. According to the process, a sufficient nugget area can be ensured even when the width of a region permitting the formation of a nugget is narrow.