Prismatic secondary battery

Abstract

An object of the invention is to obtain a rectangular secondary battery in which an outer surface of the battery has an insulating property and watertightness, and a short-circuit due to dew condensation water or the like does not occur between battery containers of adjacent batteries or between a battery container and a housing of a battery pack. A rectangular secondary battery (90) of the present invention for solving the foregoing problems is a rectangular secondary battery in which six faces of a battery container are covered with one sheet of insulating film (50). The rectangular secondary battery (90) is characterized in that, ends of the insulating film are overlapped with each other, and the insulating film continuously covers mutually adjacent faces having each of ridges between the faces of the battery container.

Dependencies are inferred from the claim text.