Patent ID: 8852791
Filing Date: 2014-10-07
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A method of fabricating a pouch type lithium secondary battery, the method comprising: forming a pouch bare cell by enclosing an electrode assembly on all sides thereof within each of a core layer, a thermoplastic layer, and an insulation film of a pouch exterior, the pouch bare cell including an electrode tap extending from a first side of the electrode assembly; attaching a reinforcing member on at least a part of an outer surface of the pouch bare cell after forming the pouch bare cell; wrapping a sleeve member on the pouch exterior and surrounding a periphery of the pouch bare cell on all sides extending between a first end of the pouch bare cell corresponding to the first side of the electrode assembly and a second end of the pouch bare cell opposite the first end; forming a first molding unit on a first portion of the sleeve member and facing the first end of the pouch bare cell; and forming a second molding unit on a second portion of the sleeve member and facing the second end of the pouch bare cell, wherein the sleeve member is a metallic foil exposed to an outside of the secondary battery between the first and second molding units and has a mechanical strength greater than that of the pouch exterior, wherein the pouch exterior includes a first plate defining a cavity receiving the electrode assembly therein, and a second plate attached to the first plate and covering the cavity, the reinforcing member being attached to the second plate and covering the cavity, and wherein forming the first molding unit on the first portion of the sleeve member and forming the second molding unit on the second portion of the sleeve member are performed after wrapping the sleeve member, such that the first and second molding units cover outermost sides of the pouch exterior and the sleeve member at the respective first and second ends.