Patent ID: 6746798
Filing Date: 2004-06-08
Classification: H01M,Y02E

Abstract:
A battery, comprising:(a) an outer can, the can being rectangular, the outer can having a can wall having a can wall top end, the can wall having a can wall outer surface and a can wall inner surface, the can wall outer surface and can wall inner surface being parallel to each other; (b) a can flange disposed at the can wall top end, the can flange having a can flange outer surface and a can flange inner surface, the can flange outer surface and inner surface being parallel to each other; the can flange further including a can flange top surface perpendicular to the can flange inner surface; (c) a cover having a cover top surface and a cover bottom surface; (d) the cover further including a cover flange, the cover flange having a cover flange outer surface, a cover flange inner surface, a cover flange bottom surface, a cover flange top surface, a cover flange intermediate surface disposed between the cover flange inner and outer surfaces; (e) wherein the cover flange top surface is parallel to the cover flange bottom surface; and wherein the cover flange top surface is parallel to the cover bottom surface; (f) wherein the cover flange inner surface is parallel to the cover flange outer surface; (g) wherein the can flange inner surface is parallel to the cover flange intermediate surface; (h) wherein the outer can is adapted to accommodate a power generation element, formed by winding a laminate of a positive electrode and a negative electrode separated by a separator: wherein the outer can is adapted to accommodate an electrolyte; wherein the electrolyte is dissolved in an organic solvent; wherein the positive electrode comprises LixMO2 as an active material such that M comprises a transition metal; X ranges from 0.05 to 1.10; and wherein the negative electrode comprises carbonaceous material as an active material; (i) the plane of the cover top surface is in the same plane as the can flange top surface; and (j) a junction between the cover bottom surface and the cover flange intermediate surface is chamfered.