Interface between the jelly roll area of the battery cell and the cell can

摘要

The embodiment relates to a cylindrical battery cell, wherein the cylindrical battery cell has a cell can, an anode electrode, a separator, and a jelly roll area of cathode electrode foils arranged in the middle section of the cell can. The anode electrode foils, cathode electrode foils, or both extend out of the jelly roll area to the electrolyte area of the cell can. In one embodiment, some of the elongated electrode foils directly contact the end of the cell can (eg, top or bottom). In another embodiment, the elongated electrode foils contact a plurality of connecting tabs that are thermally and electrically connected to the end (eg, top or bottom) of the cell can. In another embodiment, the elongated electrode foils are bent and stacked to function as a foil-integrated connection tab that is thermally and electrically connected to the end (eg, top or bottom) of the cell can.