Highly flexible electrode assembly and battery cell including the same

摘要

The present invention relates to an electrode assembly having a structure wound in one direction with a separation membrane sheet interposed between a positive electrode and a negative electrode sheet, wherein the electrode assembly has a longitudinal length (y) of 3 times or more. There is provided an electrode assembly having the above lateral length (x) and having a structure in which both end portions are bent in the same direction with a radius of curvature (R) satisfying the following mathematical formula 1. S [{1 / ln (x / y)} × t] = R (1) t is the average thickness (mm) of the wound electrode assembly, x is the horizontal length of the electrode assembly, y is the vertical length of the electrode assembly, S is a constant of 8 or more, and ln (x / y) ≧ 1.