NOVELTY - A secondary battery includes an electrode assembly of a cathode/separator/anode structure mounted in a pouch-shaped battery case in a sealed state. A non-sealing residue portion (170) is defined between a sealing portion of the battery case and the electrode assembly for collecting generated gas.    USE - Secondary battery, e.g. lithium ion polymer battery, for use in middle- or large-sized battery module (claimed).    ADVANTAGE - Movement of the electrode assembly is restrained, and occurrence of an internal short circuit is prevented. Generation of high pressure in the battery case and the deformation of the battery are effectively prevented under the abnormal operating condition. The secondary battery can be easily manufactured while the safety of the battery is secured.    DETAILED DESCRIPTION - A secondary battery includes an electrode assembly of a cathode/separator/anode structure mounted in a pouch-shaped battery case in a sealed state. A non-sealing residue portion (170) is defined between a sealing portion of the battery case and the electrode assembly for collecting generated gas. The non-sealing residue portion is formed by mounting the electrode assembly between upper and lower laminate sheets, at least one of which has a receiving part of a size approximately corresponding to the electrode assembly; sealing three sides of the upper and lower laminate sheets, including two sides where electrode terminals are disposed, among four sides of the upper and lower laminate sheets; injecting an electrolyte in the battery case through the non-sealing portion; and sealing the non-sealing portion at a region where the non-sealing portion is spaced a predetermined width from the receiving part. The battery case is made of a laminate sheet including a resin layer and a metal layer. The laminate sheet is an aluminum laminate sheet. The non-sealing residue portion has a width equivalent to 10-40% that of the corresponding side.    DESCRIPTION OF DRAWING(S) - The figure shows a step of forming a non-sealing residue portion.    Remaining sealing portion (140)    Non-sealing residue portion (170)    Side sealing portion (172)