Patent ID: 8439983
Filing Date: 2013-05-14
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A manufacturing method for a sealed battery, comprising: a first step of (i) causing a terminal element, which is composed of a shaft portion and an apical portion provided in a first end of the shaft portion, to penetrate through a current collector such that the apical portion projects out from the current collector, (ii) shaping the apical portion into a plate-shaped portion by expanding the apical portion diametrically and (iii) pressing the plate-shaped portion against the current collector; a second step of shaping the plate-shaped portion into a frustum-shaped portion whose bottom base is facing the current collector, wherein the plate-shaped portion is shaped into the frustum-shaped portion by deforming the plate-shaped portion using a pressing die having a depression with a shape of a conical frustum; and a third step of welding the bottom base of the frustum-shaped portion and the current collector together in at least one area on a perimeter of the bottom base of the frustum-shaped portion, such that the bottom base of the frustum-shaped portion is in contact with the current collector.