Patent ID: 7951485

Claim:
A lithium rechargeable battery, comprising: an electrode assembly including a first electrode, a second electrode and a separator interposed between the first and second electrodes; a metallic can for receiving the electrode assembly therein; and an insulating case positioned at an upper portion of the electrode assembly, the insulating case comprising: a flat type body section, at least one protrusion protruding toward an inner wall of the metallic can and the protrusion contacting the inner wall of the metallic can, and a recess formed in a long lateral side of the body section, wherein the flat type body section has a bottom surface facing the electrode assembly, wherein the protrusion has a bottom surface coextensive with the bottom surface of the flat type body section, wherein the flat type body section comprises the long lateral side comprising a first portion, a second portion comprising the recess, and a third portion comprising the at least one protrusion, wherein the first portion is arranged between the second portion and the third portion, and wherein a width of the first portion in a direction parallel to the long lateral side is greater than a width of the second portion in a direction parallel to the long lateral side.