| abstract |
The present invention relates to a battery cell having an electrode assembly embedded in a battery case made of a laminated sheet including a resin layer and a metal layer, the electrode assembly having an anode, a cathode, and an electrode assembly between the anode and the The structure of the separator film between the cathodes, the battery cell is characterized by the following features, wherein the one-piece battery case is bent to form an upper case and a lower case, and a housing in which an electrode assembly is accommodated is formed in the upper case and/or the lower case portion, and rounded corners are formed at one or more side surface corners of the accommodating portion, a sealing portion formed by heat welding of the upper case and the lower case is located at least one of the electrode terminals among the side portions of the battery case The located upper side, the first lateral side adjacent to the upper side and the lower side facing the upper side, and the second lateral side adjacent to the upper side are formed by the curved structure of the battery case. |