Rechargeable battery

Abstract

A rechargeable battery includes: an electrode assembly; an outer case to enclose the electrode assembly, where the outer case includes an opening; a cap plate to seal the opening of the outer case; an insulating case of a predetermined height installed within the outer case, the insulating case installed between the cap plate and the electrode assembly; and an electrode terminal installed on the cap plate and electrically connected to the electrode assembly, where the outer case includes an insulating portion formed on an inner surface of the opening thereof adjacent said insulating case, said insulating portion being electrically insulating, and said insulating portion located at an upper portion of the outer case and being shaped to prevent foreign substances from flowing from the external environment into the outer case.

Dependencies are inferred from the claim text.