Square-shell battery

The utility model relates to the field of batteries, and discloses a square-shell battery. The square shell battery comprises an open shell, a cover plate buckled at the open end of the shell and a battery cell arranged in the shell, an insulating glue layer is wound on the periphery of one end, close to the cover plate, of the battery cell, and insulating films are arranged in a blank area and the end part of the periphery of the battery cell. According to the square-shell battery provided by the utility model, the insulation of the battery cell adopts an arrangement mode of matching the insulating glue layer with the insulating film, and the welding of the insulating film and the side edge of the lower plastic plate of the cover plate is canceled, so that the design thickness of the lower plastic plate is reduced, the space utilization rate in the shell is improved, and the energy density of the battery can be improved; the insulation glue layer can be installed without the help of other structures, the ins