battery and battery pack containing the battery

Abstract

Battery characterized in that it comprises a housing body, wherein the side surface of the housing body is provided with an insulating coating; wherein the side surface comprises two opposing first surfaces, wherein a void is provided on the first surface which is not provided with the insulating coating; wherein the housing body, the insulating coating and the voids on the two first surfaces satisfy the following condition: 0.014 mm ≤ (S1(D1+D2)) / S2 ≤ 0.9 mm, where S1 is the total area of ​​the voids on the two first surfaces in mm², S2 is the total area of ​​the side surface in mm², D1 is the thickness of the side surface of the housing body on which the voids are arranged, in a direction perpendicular to the first surface in mm, and D2 is the thickness of the insulating coating in a direction perpendicular to the first surface in mm.