Battery cells with chamfered protective tape formed on them

Abstract

The present invention provides a battery cell for a secondary battery, in which an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is incorporated into a battery case, The positive electrode has a positive electrode tab extending from a positive electrode current collector formed on one side thereof, and the negative electrode has a negative electrode tab extending from a negative electrode current collector formed on one side thereof, The positive electrode tab and the negative electrode tab each have a first bent portion and a second bent portion bent in a V-shape at an upper portion of the electrode assembly from which the positive electrode tab and the negative electrode tab protrude, a protective tape is attached to the first folded portion, the second folded portion, and an upper portion of the electrode assembly adjacent to the first and second folded portions to cover the electrode assembly; The upper ends of both ends of the protective tape relate to the battery cells being chamfered.