Abstract: An electrochemical cell of the present invention includes a composite cover assembly for the closed end of the cylindrical can of the electrochemical cell. The composite cover includes an electrically conductive contact terminal having a diameter substantially smaller than the diameter of the cylindrical can, and a flexible disk-shaped label that covers the portion of the surface of the closed end of the can that is not covered by the contact terminal. By using a smaller contact terminal, the gap 19 (FIGS. 1 and 2) provided between the positive cover 17 and the closed end 14 of can 15 to accommodate cell bulging in the conventional construction, may be substantially eliminated and the length of the can may be increased without exceeding the standards established for overall battery length. Thus, more active ingredients may be contained in the can, thereby increasing the service life of the electrochemical cell.

Abstract: A cup-shaped separator and method of assembly for an electrochemical cell for separating a positive electrode from a negative electrode. The separator comprises a sheet of non-conductive separator material have a bottom section and a side wall section. The separator sheet has a plurality of tabs formed in the bottom section. The separator sheet is rolled and the plurality of tabs are folded inward to form a closed bottom surface of the cup-shaped separator.