| 摘要 |
PURPOSE:To improve the sealing performance by providing the upward inclination at the upper end section as a positive electrode holding ring with a reverse L-shaped cross section and forming leg sections in contact with the bottom section of a positive electrode can when assembling and sealing a cell. CONSTITUTION:A negative electrode can 1 concurrently serving as a negative electrode terminal is obtained by contraction-processing a three-layer clad plate of Ni-SUS steel-Ni, a negative electrode 2 is obtained by punching an Li sheet with the thickness of 1.4mm to the diameter of 6.2mm, and it is pressed to the inner face of the negative electrode can. A positive electrode can 6 made of Ni-plated SUS steel with the thickness of 0.22mm concurrently serves as a positive electrode terminal. A positive electrode 5 is filled in this positive electrode can 6, a separator 4 made of a micro-porous polypropylene sheet is mounted on it, an impregnant holding an electrolyte is arranged between the negative electrode and the positive electrode made of an nonwoven fabric using polypropylene as the main element. A gasket 7 mainly made of polypropylene is inserted between the negative electrode can 1 and the positive electrode can 6 to maintain the electric insulation between both electrodes, the opening edge of the positive electrode can 6 is folded inward and caulked, thereby the contents of a cell are sealed. |
