Battery monomer, battery and electric equipment

The invention provides a battery monomer, a battery and electric equipment, and relates to the field of batteries. A battery cell includes a housing, an electrode assembly, and a support. The housing has a wall portion. The electrode assembly has a main body portion and a tab protruding from an end of the main body portion facing the wall portion in the first direction. The tab comprises a root part and a tab part, and the root part is connected with the main body part and the tab part. The supporting piece is arranged on the side, facing the wall part, of the body part. The supporting piece comprises a wing part, and the tab part is bent around the wing part. Wherein the wing part is provided with an accommodating part, and the accommodating part is used for accommodating one part of the root part. The supporting piece is arranged between the wall part and the main body part, and the tab part is bent around the wing part of the supporting piece, so that the tab part is folded along a fixed form, the tab can be protected, the tab is not easy to bifurcate and insert, and the safety of the battery monomer is improved. The accommodating part is arranged on the wing part, the root part of the tab can be accommodated in the accommodating part, and the total space occupied by the wing part and the root part is reduced, so that the energy density of the single battery is favorably improved.