BATTERY, JOINING JIG, JOINING APPARATUS, AND MANUFACTURING METHOD OF BATTERY

Abstract

A battery of an embodiment includes an electrode group, a lead, a groove, and a concave structure, and the electrode group includes a current collecting bundle protruding toward one side in a length direction. The lead is joined to the current collecting bundle with being stacked on the current collecting bundle from one side in a thickness direction of the electrode group crossing the length direction. The groove is depressed to a groove bottom toward a side on which the lead is located in the thickness direction in a joint part between the lead and the current collecting bundle. The concave structure includes one or more concave portions each further depressed from the groove bottom toward the side on which the lead is located, and the groove bottom neighbors the concave structure from a side opposite to a protruding side of the current collecting bundle in the length direction.

CPC Classifications