| 摘要 |
The present invention relates to a pouch-type secondary battery having a structure adapted to enhance electric capacity. A pouch-type secondary battery according to a preferred embodiment of the present invention is a pouch-type secondary battery in which an electrode assembly is housed in a housing part of a pouch exterior material, wherein the vertex portion of the inner surface of the housing part is rounded; the electrode assembly includes an unit stack part having (a) a structure in which electrodes and separators, each of equal number, are alternately arranged, so that one kind of integrally-combined basic unit is repeatedly arranged, or (b) a structure in which electrodes and separators, each of equal number, are alternately arranged, so that two or more kinds of integrally-combined basic units are arranged according to a fixed order; the end of the separator is not bonded to the end of an adjacent separator; the one kind of basic unit in (a) has a four-layer structure in which a first electrode, a first separator, a second electrode and a second separator are sequentially stacked, or a structure in which the four-layer structure is repeatedly stacked; and stacking each of the two or more kinds of basic units in (b) one by one according to a fixed order forms the four-layer structure or a structure in which the four-layer structure is repeatedly arranged, the vertex portion of the separator being rounded to correspond to the vertex portion of the inner surface of the housing part. |
