| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery in which generation of a magnetic field due to a current flow is decreased during use, and the impact of noise due to the magnetic field on a hearing aid and the like, is reduced.SOLUTION: In the nonaqueous electrolyte secondary battery of the present invention, a positive electrode core exposed part 21a is formed in a positive electrode plate 20 on the start-of-winding side or the end-of-winding side thereof. A negative electrode core exposed part 25a is formed in a negative electrode plate 24 on the same side as the positive electrode core exposed part 21a. Positive electrode tabs 12a and negative electrode tabs 13a are spot welded, respectively, to the positive electrode core exposed part 21a and negative electrode core exposed part 25a at a plurality of positions. Spacing of the spot welding points of the positive electrode tabs 12a and negative electrode tabs 13a decreases as the distance from the lead-out side thereof increases. |
