Battery

The invention provides a battery which comprises a battery cell body and a packaging shell, the packaging shell is provided with a sealing edge and a cavity for containing the battery cell body, the sealing edge is provided with a tangent plane cut in the thickness direction of the sealing edge, the sealing edge extends upwards along the side face of the battery cell body, the surface of the side, close to the battery cell body, of the sealing edge is an inner side face, and the surface of the side, close to the battery cell body, of the sealing edge is an outer side face. The surface of one side, deviating from the battery cell body, of the sealing edge is an outer side surface, the tangent plane is provided with a first bonding body, and the first bonding body wraps the tangent plane and part of the inner side surface and part of the outer side surface of the sealing edge; the lower edge, on the inner side face, of the first bonding body is higher than the lower edge, on the outer side face, of the first bo