| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical lithium ion battery, in which double-ply separators are used and winding slips hardly appear at winding-around. SOLUTION: Non-smooth faces of two separators made of polyethylene are overlapped in a counterposed state to each other, and the top end parts of them are welded and integrated. Then, after the top end parts of two integrated pairs of separators 24 are welded with an axial core 21, they are wound around together with an cathod plate 2 and a anode plate 23, and wound-around groups 6 are made. By using the wound-around groups 6, a cylindrical lithium ion battery is produced. |
