Sealing Block to Prevent Crack of Pouch-Type Secondary Battery Pouch-Type Battery Case and Sealing Method for Pouch-Type Battery Case Using thereof

摘要

The present invention relates to a sealing block for sealing of a pouch type secondary battery which comprises: a body portion heating and/or pressurizing and sealing the outer periphery, from which an electrode terminal protrudes, and the outer periphery of a battery case parallel to the outer periphery; and a wrinkle preventing portion including a curved surface structure coupled to one side of the body portion in the direction perpendicular to the one side of the body portion and corresponding to a rounded corner portion of an electrode assembly receiving portion. The wrinkle preventing portion includes an extension portion for connecting the body portion and the curved surface structure of the wrinkle preventing portion. Accordingly, the sealing can be performed in a state in which the wrinkle preventing portion is positioned adjacent to the electrode assembly receiving portion through the extension portion. Therefore, the outer periphery of the battery case is fused to a portion adjacent to the corner portion of the electrode assembly receiving portion so as to form a sealing portion such that the sealing portion of the battery case is fixed, thereby preventing the battery case from being easily deformed and preventing wrinkles from occurring in the battery case.