The invention discloses a battery cell, a battery and electric equipment. The battery cell comprises an electrode assembly and insulation paste, the electrode assembly is provided with a tab, and the tab covers the end face of the electrode assembly; the insulation paste comprises a first area and a second area, the first area is attached to the peripheral wall of the electrode assembly, the second area is attached to the tab, and at least one first notch is formed in the second area. According to the embodiment of the invention, the first notch is formed in the second area, so that the stress generated by the insulating glue in the attaching process can be released, the second area can be flatly attached to the tab, the possibility that the tab is separated under the working conditions of vibration and the like in the process that the battery cell enters a shell or is used is reduced, the safety performance of the battery cell is improved, and after the battery cell enters the shell, the reliability of the battery cell is improved. The contact area between the tab and an electrolyte can be increased, so that the infiltration of the electrolyte on a battery cell is facilitated; after the battery is assembled and formed, in the charging and discharging process of the battery, the first gap of the second area is beneficial to heat dissipation of the tabs of the battery cell, and the safety performance of the battery is improved.