| 摘要 |
PROBLEM TO BE SOLVED: To detect displacement which may occur between positive and negative pole positions when applying pole plates with a winding structure to a coin- shaped cell. SOLUTION: A positive pole plate 11 and a negative pole plate 12 are flatly wound so that positive pole laminating faces 22a to 22e and negative pole laminating faces 23a to 23f are alternately laminated with a separator interposed therebetween. On the positive pole laminating faces 22a, 22b and the negative pole laminating face 23a facing each other at the start of winding, and on the positive pole laminating face 22e and the negative pole laminating face 23f facing each other at the end of winding, there are formed displacement detecting holes 41a, 41b, 42, 43, 44 to detect the position deviation of the pole laminating faces by X-ray examination of the wound pole plates. |
