Battery monomer, battery and electric equipment

The utility model provides a battery monomer, a battery and electric equipment, and relates to the field of batteries. The battery cell includes an electrode assembly and a case for accommodating the electrode assembly. The housing has a wall portion. In the first direction, the wall part and the electrode assembly are oppositely arranged, and the wall part abuts against the electrode assembly so as to limit the electrode assembly to move in the shell in the first direction. In the first direction, the inner surface of the wall portion protrudes toward the electrode assembly to form a first convex surface which abuts against the electrode assembly. The wall portion of the battery cell abuts against the electrode assembly, so that the electrode assembly is limited to move in the shell in the first direction, shaking of the electrode assembly in the shell is limited to a certain extent, the risk of damage to the electrode assembly is reduced, and the reliability of the battery cell is improved. 本申请提供了一种电池单体、电池及