Patent ID: 8974956
Filing Date: 2015-03-10
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A secondary battery, comprising: at least one positive electrode plate folded on a basis of a first fold line into two parts; and at least one negative electrode plate folded on the basis of a second fold line into two parts and stacked to face the at least one positive electrode plate with the second fold line coinciding with the first fold line, wherein each of the at least one positive electrode plate and the at least one negative electrode plate comprises an electrode collector formed of a metal plate, and an electrode coating portion formed on a surface of the electrode collector, wherein the first and second fold lines are positioned to align the at least one positive and the at least one negative electrode plate when stacked wherein the at least one positive electrode plate and the at least one negative electrode plate are further folded in a direction opposite the first and second fold lines so that the electrode coating portions of the at least one positive electrode plate and at least one negative electrode plate on opposite sides of the first and second fold lines are respectively co-planar.