Battery and battery pack

Abstract

Battery, characterized in that it comprises a housing body, a cover plate and battery cells; wherein at least one end of the housing body is provided with an opening area, the cover plate blocking the opening area and being connected to the housing body by welding to enclose a receiving space, the housing body comprising an inner surface close to the receiving space and an outer surface remote from the receiving space, the inner surface comprising two first inner surfaces spaced apart in a first direction and two second inner surfaces spaced apart in a second direction;furthermore, a third direction perpendicular to the cover plate is defined, wherein the first direction, the second direction, and the third direction are orthogonal to each other, wherein the area of ​​the first inner surfaces is larger than the area of ​​the second inner surfaces, wherein at least one of the first inner surfaces is provided with a first projection, wherein the first projection is arranged projecting along the first inner surface in the direction of the battery cell, wherein the first projection is close to the surface on which the opening area is arranged or is directly adjacent to the surface on which the opening area is arranged; wherein the battery cell is housed within the receiving space, wherein the outer surface of the battery cell comprises two first outer surfaces spaced apart in the first direction and a second outer surface;wherein the second outer surface forms an open end of the battery cell, wherein the area of ​​the first outer surfaces is larger than the area of ​​the second outer surface; wherein the dimension of the first projection in the first direction is x, where the unit of x is given in mm, wherein the mass fraction of the silicon element is y %, wherein the ratio of the area of ​​the second outer surface of a single battery cell to the area of ​​the first outer surface of the battery cell is z, wherein the capacity of the battery is A, where the unit of A is given in Ah, wherein 110 Ah / mm ≤ A / (x * y * z) ≤ 349655 Ah / mm;wherein the outer surface of the housing body is provided with a third projection, wherein the third projection and the first projection are arranged on two opposite surfaces of the same wall of the housing body, wherein in the first direction the orthogonal projection of the third projection onto the first inner surface is arranged to overlap at least partially with the orthogonal projection of the first projection onto the first inner surface; In the third direction D3, the range of values ​​for the dimension of the first inner surface is in the range of 70 - 700 mm.;