POUCH-TYPE SECONDARY BATTERY SEALING BLOCK FOR PREVENTING CRACKS, POUCH-TYPE BATTERY CASE MANUFACTURED BY USING SAME, AND SEALING METHOD FOR POUCH-TYPE BATTERY CASE

摘要

Disclosed herein is a sealing block for sealing a pouch-shaped secondary battery, the sealing block including a main body unit for sealing an outer edge of a battery case from which an electrode terminal protrudes and an outer edge of the battery case parallel thereto by applying heat and/or pressure thereto and a wrinkle prevention unit coupled perpendicularly to one surface of the main body unit, the wrinkle prevention unit including a curved structure that corresponds to a rounded corner of an electrode assembly reception unit, wherein the wrinkle prevention unit further includes an extension portion for connecting the curved structure of the wrinkle prevention unit to the main body unit. Sealing may be performed in the state in which the wrinkle prevention unit is located so as to be adjacent to the electrode assembly reception unit via the extension portion. As a result, the outer edge of the battery case that is adjacent to the corner of the electrode assembly reception unit is fused such that a sealed portion is formed thereat. Consequently, the sealed portion of the battery case is fixed, whereby the battery case is prevented from being deformed and wrinkles are prevented from being formed in the battery case.