| 摘要 |
PURPOSE:To prevent lithium from adhering to the opening end of a battery case and avoid the generation of welding failure by mounting a thin metal plinth so as to cover the one end face of a lithium cylindrical body and the external surface of its vicinity and inserting it in the battery case from the side. CONSTITUTION:A thin metal annular plinth 2 with its crosssection formed in a L-shape that covers the lower end face of a lithium cylidrical body 1 and the external surface of its vicinity is mounted at the lower part of the lithium cylindrical body 1 formed in specified dimensions and the said lithium cylindrical body 1 is inserted in a battery case 5 from the side where the plinth 2 is mounted. In this case, since the lower end face of the lithium cylindrical body 1 and the external surface of its vicinity are covered with the plinth 2, the tip of the lithium cylindrical body 1 is not made to directly contact the opening end face of the battery case 5 and thus the adhesion of lithium into the opening end of the battery case is prevented. Therefore, when the periphery of the metal body section 7 of a cover 6 and the opening end of the battery case 5 are welded together using plasma arc, laser etc., the generation of welding failure can be prevented. |
