Pole-free square battery and battery pack

The utility model discloses a post-free square battery and a battery pack, the post-free square battery comprises an electrode cover plate, an insulation sealing assembly, a battery cell and a shell, the shell is provided with an opening part, the opening part is provided with a caulking groove, the edge of the electrode cover plate is matched with the caulking groove so as to enable the electrode cover plate to cover the opening of the shell, and the insulation sealing assembly is arranged in the caulking groove. The insulation sealing assembly is located between the shell and the electrode cover plate, so that the shell and the electrode cover plate are insulated and sealed, the battery cell comprises a cell body part and a tab part, the battery cell is located in the shell, and the tab part is electrically connected with the electrode cover plate. 本申请公开了一种无极柱方形电池及电池组，所述无极柱方形电池包括电极盖板、绝缘密封组件、电芯和壳体，其中，所述壳体具有开口部，所述开口部设置有嵌槽，所述电极盖板边缘与所述嵌槽配合从而使所述电极盖板封盖所述壳体的开口，所述绝缘密封组件位于所述壳体和所述电极盖板之间，使所述壳体和所述电极盖板之间绝缘密封，所述电芯包括芯体部和极