| 摘要 |
PURPOSE:To easily improve the close contactness between power generating elements by pressing a spherical body in the hollow section of a cylindrical negative electrode made of light metal and always keeping the cylindrical shape. CONSTITUTION:Positive electrode black mix 18 is pressurized and molded on the internally circumferential surface of a cylindrical positive electrode can 12 with the bottom and a cylindrical negative electrode 14 whose outside diameter is slightly smaller than the inside diameter of the black mix 18 wind a separator 16 on the external circumference and then is fit in the hollow section of the black mix 18. One end of a beltlike lead plate 20 is spot-welded on the inner surface of a dish-shaped negative electrode terminal plate 26 and an annular sealing gasket 28 is fit and engaged and mounted on the external circumference of the plate 26, the other end side of the plate 20 is applied to the inner surface side, and a spherical body 30 with a slightly larger diameter than the inner diameter of the negative electrode 14 is pressed in using a proper jig. As a result, the negative electrode 14 made of light metal that is easy to plastic-deform is shaped into a normal cylindrical shape and the internal resistance of a battery can be reduced. A spherical body 30 with the resistance to the nonaqueous electrolytic liquid is left in a battery. |
