| 摘要 |
Disclosed herein is a middle or large sized battery, more particularly, a middle or large sized battery that provides improved volume energy density provides an advantageous structure for preparing an end cell with large capacity, particularly by improving the structure of a can and internal connecting system of positive and negative electrodes in the middle or large sized battery. According to the present invention, a middle or large sized battery is provided which comprises a can having an open portion formed on two opposing sides; an electrode jelly roll disposed inside the can, and comprising a current collector of positive electrode, a separator, and a current collector of negative electrode being stacked in turn and wound therein; a lead tab connected to the current collector of positive and negative electrodes of opposing sides in the electrode jelly roll; and a lateral cap assembly electrically in contact with the lead tab and coupled to the opposing sides of the can. |
