CABLE-TYPE SECONDARY BATTERY ???? ????

摘要

The present invention relates to a cable-type secondary battery, comprising: an electrode assembly further including a first polar electrode and a second polar electrode, each of the electrodes which are formed in a thin and long shape on the surface of a current collector having a cross section that creates a right angle with the lengthwise direction thereof in the shape of a circle, an asymmetric ellipse, or a polygon, the surface of the electrode being coated with an electrode active material, and including electrolyte or a dividing film that is interposed between the first power electrode and the second polar electrode; and a cover member for covering the electrode assembly, wherein the cover member is provided with an uneven pattern of a predetermined form that is at least partially concave or protruding in the direction of the electrode assembly. The present invention is highly flexible as the cover member is provided with the uneven pattern having an uneven structure. Also, when the cover member having the uneven structure is applied to the cable-type secondary battery, which is provided with an active material layer that forms the pattern, flexibility can be maximized.