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

The present invention relates to a sealing block for sealing a pouch-type secondary battery, comprising: a main body part for sealing, with heating and/or pressure, an outer circumferential side from which an electrode terminal protrudes and an outer circumferential side of a battery case in parallel thereto; and a crease prevention part coupled to one side surface of the main body part in a vertical direction and comprising a curved surface structure corresponding to a rounding corner portion of an electrode assembly accommodation part, wherein the crease prevention part comprises an extension part for connecting the main body part and the curved surface structure of the crease prevention part, and thus sealing can be achieved in a state in which the crease prevention part is located adjacently to the electrode assembly accommodation part through the extension part. Therefore, since a sealing part is formed by fusing the outer circumferential side of the battery case with a portion adjacent to the corner portion of the electrode assembly accommodation part, the sealing part of the battery case is fixed, and thus the battery case is hardly altered, and the occurrence of creasing on the battery case can be prevented.