Patent ID: 8673476
Filing Date: 2014-03-18
Classification: H01M,Y02E,Y02P

Abstract:
1. A stacking or stacking/folding electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure comprising: electrode tabs having no active material applied thereto, protruding along a first direction from electrode plates constituting the electrode assembly, and electrode leads located at a side of the electrode tabs such that the electrode leads are electrically connected to the electrode tabs, which are stacked along a second direction substantially perpendicular to the first direction, and when viewing the electrode leads from above along the second direction, the electrode leads, joined to the electrode tabs, each have first and second ends spaced apart along the first direction, top and bottom surfaces spaced apart along the second direction, and opposite sides, the opposite sides connecting the first and second ends and connecting the top and bottom surfaces, wherein intersections between the first and second ends and the opposite sides of the electrode leads are rounded when viewing the electrode leads from above along the second direction and intersections between the opposite sides and the top and bottom surfaces of the electrode leads are rounded when viewing a vertical section of the electrode leads along the first direction, wherein the intersections between the first and second ends and the opposite sides of the electrode leads are rounded with a radius having a size equivalent to 1/20 to ⅓ a width of the electrode leads between the opposite sides, and wherein the intersections between the opposite sides and the top and bottom surfaces of the electrode leads are rounded with a radius having a size equivalent to ⅕ to ½ the width of the electrode leads.