Battery, battery set, battery pack and power-consuming device

Abstract

Battery, characterized in that it comprises: a housing body (20), wherein the housing body (20) comprises a cell pole plate (21), a first side plate (22) and a second side plate (25), wherein the first side plate (22) and the second side plate (25) are connected to both interconnected sides of the cell pole plate (21), wherein an area of ​​an outer surface of the first side plate (22) is larger than an area of ​​an outer surface of the second side plate (25), wherein the area of ​​the outer surface of the first side plate (22) is larger than an area of ​​an outer surface of the cell pole plate (21), wherein the cell pole plate (21) comprises a main body section (211) and a projection section (212) connected to the main body section (211), wherein a first side (214) of the projection section (212) extends to a first side edge (215) of the cell pole plate (21) and is connected to the first side plate (22);Cell poles (30) arranged on the cell pole plate (21); wherein the ratio of an area of ​​a surface of the projection section (212) to an area of ​​an outer surface of the main body section (211) is greater than or equal to 0.2 and less than or equal to 0.45.