Patent ID: 9012067
Filing Date: 2015-04-21
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A method of manufacturing a battery cell having an electrode assembly of a cathode/separator/anode structure disposed in a battery case made of aluminum or an aluminum alloy together with an electrolyte in a sealed state, the method comprising: (a) anodizing an entire surface of the battery case in a state in which a connection opening section, to which charge pins used to activate the battery cell are connected, is formed at a bottom of the battery case; (b) mounting the electrode assembly in the battery case and connecting a cap plate to an open upper end of the battery case by laser welding; (c) injecting an electrolyte through an electrolyte injection port of the cap plate and activating the battery cell; and (d) replenishing the electrolyte and sealing the electrolyte injection port.