초록 ▼

A lithium secondary battery having a bi-cell type battery cell consisting of an anode plate, a separator fixed to both surfaces of the anode plate and a cathode plate fixed to either outer surface of the separator, wherein the cathode plate includes a cathode current collector, a front cathode sheet

A lithium secondary battery having a bi-cell type battery cell consisting of an anode plate, a separator fixed to both surfaces of the anode plate and a cathode plate fixed to either outer surface of the separator, wherein the cathode plate includes a cathode current collector, a front cathode sheet fixed to one surface of the cathode current collector, which is adjacent to the anode plate, and a rear cathode sheet fixed to the other surface of the cathode current collector and having a thickness different from that of the front cathode sheet.

대표청구항 ▼

1. A lithium secondary battery having a bi-cell battery cell including:an anode plate, first and second separators fixed to respective opposite surfaces of and sandwiching the anode plate, and first and second cathode plates fixed to outer surfacer of the first and second separators, respectively, w

1. A lithium secondary battery having a bi-cell battery cell including:an anode plate, first and second separators fixed to respective opposite surfaces of and sandwiching the anode plate, and first and second cathode plates fixed to outer surfacer of the first and second separators, respectively, wherein each of the first and second cathode plates includes a cathode current collector, a front cathode sheet fixed to a front surface of the cathode current collector, adjacent to a respective one of the first and second separators, and a rear cathode sheet fixed to a rear surface of the cathode current collector, remote from the respective one of the first and second separators, and having a smaller thickness than the front cathode sheet, wherein the front cathode sheet is no thicker than five times the thickness of the rear cathode sheet.