Patent ID: 7960048

Claim:
An electrode assembly for a lithium ion secondary battery comprising: a jelly roll assembly comprising a positive electrode plate, a negative electrode plate, and a separator between the positive electrode and the negative electrode plate, the positive electrode plate, the negative electrode plate, and the separator being wound together; and a sealing tape attached to an outer circumference of the jelly roll assembly the sealing tape comprising a plurality of sub-sealing tapes, the sub-sealing tapes being spaced apart from each other, wherein the sealing tape absorbs an electrolyte to increase in volume, and is arranged to cover a completing part of the electrode assembly, the completing part being where an outermost end of the separator is positioned at the outer circumference of the jelly roll assembly, and wherein the sealing tale is attached so that the separator is exposed through an upper end of the outer circumference of the jelly roll assembly and/or a lower end of the outer circumference of the jelly roll assembly.