| 摘要 |
PURPOSE:To easily form a non-perfectly cylindrical battery, by inserting a cylindrically spiral electrode body into a bottomless perfectly-cylindrical metal-armoring case, pressing said case to obtain a desired cross-sectional shape, then hermetically sealing the upper and lower opening parts. CONSTITUTION:A spiral electrode body (a) which is made by cylindrically winding in a spiral form a positive electrode plate 1' and a negative electrode plate 2' through a separator 3' is inserted into a bottomless perfectly-cylindrical metal- armoring case 4', then said armoring case 4' is pressed from every direction by means of a metal mold to obtain a desired cross-sectional shape. After that, a bottom lid 8 serving also as a negative terminal is welded to the lower opening part of the case 4', into which an electrolytic solution is poured. Then, a sealing plate 7 on which the positive terminal 6' fitted with a safety valve is provided is welded to the upper opening part, thereby the captioned battery is completed. Consequently, non-perfectly cylindrical batteries of desired shapes such as long cylindrical shape, quadrangularly cylindrical shape or the like can be easily formed without deeply drawing the armoring case 4'. |
