Lg Chem, Ltd

Sung-Min Park

Pil-Kyu Park

Joo-Hwan Sung

Jong-Hoon Park

Han-Gab Song

A lithium secondary battery is provided which includes a cylindrical jelly roll in which an electrode assembly having a stacked structure including a positive electrode is wound cylindrically, wherein a semi-cylindrical first winding core and second winding core are spaced apart from each other by a predetermined interval, the positive electrode includes a non-coated portion sheet having a positive electrode tab fused thereto and a coated portion sheet, and the non-coated portion sheet and the coated portion sheet are attached by a tape to provide the positive electrode, one end of the positive electrode is positioned at the core portion of the cylindrical jelly roll, and a portion of the positive electrode having the tape is positioned around a circumference of the winding core member such that it avoids a portion where the first winding core is spaced apart from the second winding core by the predetermined interval.

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Daejeon, South Korea

Sung-Min Park