Pouch-typed Secondary Battery

The present invention relates to a housing a secondary battery incorporated in a pouch-shaped battery case, an electrode assembly, a battery case is paid that the corners of the outer peripheral surface can be made, and an electrode assembly in a round structure also corresponds to corner it consists of a round structure, the electrode assembly corners round of sequentially laminating a tapered positive and negative electrodes and a separator edge is not tapered after, the number of the by welding shrinkage and heat in a round structure by the edge portion of the membrane protrudes from the positive electrode and the negative electrode to the heat treatment paying provides a secondary battery characterized in that the transformation into a round structure that can be housed in the structure. Therefore, the secondary battery according to the present invention, the edges can be easily formed a round structure of the electrode assembly so that it can be easily accommodated in a battery case of a round construction, is accommodated in the process, or the battery case for storing into the battery case, in the presence, possible to prevent the positive electrode and the negative electrode of the electrode assembly, and moving the separation, it is possible to improve the mounting strength and stability of the external impact of the electrode assembly to the battery case.