| 摘要 |
PURPOSE:To obtain a battery of excellent reliability with less possibility of its insulating member being damaged by setting the ratio and difference of/ between the outside diameter of an ignition pad and that of a heating agent in a specific region, and bringing the ignition pad and the heating agent in contact with each other. CONSTITUTION:The outside diameter of an ignition pad 13 is made smaller than that of a heating agent 2 within the range of 70 to 90%, and the size difference between them is reduced to within 10mm, and the pad 13 and the heating agent 2 are further brought in contact with each other. Thereby burning is not directly transmitted from the pad 13 to a fuse band 5 but is first transmitted to the heating agent 2 and is next transmitted to the fuse band 5 via the heating agent 2. The reaction residue of the pad 13 is therefore fixed integrally with the reaction residue of the heating agent 2 so that there is less possibility of an insulating member being broken. Thus, without forming an internal discharge circuit for a positive electrode lead plate 8' nor for a negative electrode lead plate 9', a battery excellent in duration and reliability is obtained. |
