Battery monomer, battery and electric equipment

The embodiment of the invention provides a battery monomer, a battery and electric equipment. The battery cell includes: a case having an opening; the electrode assembly is accommodated in the shell; the cover body seals the opening, and the cover body and the shell form a sealing structure; wherein one of the shell and the cover body is provided with a first flanging part, the first flanging part is connected with the other one of the shell and the cover body through a connecting part, the connecting part comprises a first area and a second area, and the strength of the second area is lower than that of the first area. The battery monomer has relatively good safety. 本申请实施例提供一种电池单体、电池及用电设备。电池单体包括：壳体，具有开口；电极组件，容纳于所述壳体内；盖体，封闭所述开口且与所述壳体形成密封结构；其中，所述壳体和所述盖体中一者具有第一翻边部，所述第一翻边部与所述壳体和所述盖体中另一者通过连接部连接，所述连接部包括第一区域和第二区域，所述第二区域的强度低于所述第一区域的强度。该电池单体，具有较好的安全性。