LITHIUM ION SECONDARY BATTERY, MANUFACTURING METHOD THEREOF, AND MANUFACTURING DEVICE

摘要

PROBLEM TO BE SOLVED: To suppress occurrence of a short-circuit defect on a cut surface of an electrode in a lithium ion secondary battery.SOLUTION: The lithium ion secondary battery comprises: a positive electrode sheet that is formed by applying a positive electrode material and a first insulation material onto both sides of a positive electrode plate and then cutting the positive electrode plate into a predetermined width dimension; a negative electrode sheet that is formed by applying a negative electrode material and a second insulation material onto both sides of a negative electrode plate and then cutting the negative electrode plate into a predetermined width dimension; a conductor portion which is formed on the positive electrode sheet or the negative electrode sheet and connected with an electrode terminal; and an insulator which prevents short-circuiting between a cut surface of the positive electrode sheet or the negative electrode sheet and the conductor portion. The insulator is inserted between the conductor portion and the cut surface of the positive electrode sheet or the negative electrode sheet.SELECTED DRAWING: Figure 3