| 摘要 |
PROBLEM TO BE SOLVED: To secure the degree of sealing sufficient for maintaining a battery performance for a long time even in the case where a thin can and an aluminium can is used for battery by pinching an opening part of a battery can with an inside insulating gasket and an outside metal reinforcing material for sealing. SOLUTION: A separator is pinched between a negative electrode and a positive electrode, and they are integrally wound into a roll so as to form an electrode element 1. The element 1 is housed, for example, in an aluminium cylindrical battery can 4 at 0.2mm of plate thickness, and a positive electrode lead 7 is welded to a bottom of the can 4, and a ring-shaped iron reinforcing body 2 at 0.3mm of plate thickness is fitted on the outside of the opening part of the can. The can 4 is rotated, and while a disc is pressed to the inside so as to form a groove. A gasket 3 is inserted into the groove, and the groove is filled with the electrolyte, and thereafter, a sealing lid body 9, to which an explosion preventing valve 8 is welded and which is used as a negative electrode lead 6 and a negative electrode outer terminal, is overlapped, and an edge of the can 4 is caulked for fixation so as to form a battery. A negative electrode tab 11 and a positive electrode tab 12 are respectively spot-welded to the lid body 9 and the reinforcing body 2. |
