BATTERY DEVICE

A battery device includes batteries arranged in a first direction. Each battery includes a top surface, a bottom surface, two first side surfaces, and two second side surfaces. The first side surfaces are perpendicular to and spaced apart in the first direction. The second side surfaces are parallel to the first direction and spaced apart in a second direction perpendicular to the first direction. Each battery has a flange structure arranged along at least one of the top surface, the bottom surface, and the second side surfaces. The battery device further includes brackets in contact with at least one of the top surface, the bottom surface, and the second side surfaces. The height of each bracket is greater than or equal to the height of the flange structure. At least a part of each bracket is located between at least a part of the flange structures of adjacent batteries.