| 摘要 |
Disclosed herein is a secondary battery including two or more stacking-folding type cells ('unit cells') manufactured by winding small-sized electrode assemblies ('bicells') constructed in a stacking type structure in which electrodes having the same polarity are located at opposite sides of each electrode assembly and small-sized electrode assemblies ('full cells') constructed in a stacking type structure in which electrodes having different polarities are located at opposite sides of each electrode assembly using a long separator sheet, wherein the unit cells are mounted in a battery case, each unit cell has one or more electrode terminals protruding from each end of each unit cell, and the unit cells are mounted in a receiving part of the battery case such that the unit cells are arranged in a stacking arrangement structure or a plane arrangement structure while the electrode terminals of the unit cells are connected with each other. According to the present invention, the electrical and physical coupling force between the unit cells is increased. Consequently, the high-capacity secondary battery according to the present invention exhibits an improved structural stability. In addition, it is possible to greatly increase the capacity of the secondary battery according to the present invention through a simple assembly process. |
