Energy storage device and energy storage device control system

The utility model discloses an energy storage device and an energy storage device control system. The energy storage device comprises a box body, a battery module and at least one connecting sheet. A containing cavity is defined in the box body, at least one opening is formed in the side face of the box body, the battery module is arranged in the containing cavity, and the connecting piece is connected between the side face, close to the opening, of the battery module and the box body. Therefore, the connecting piece is connected between the side surface, adjacent to the opening, of the battery module and the box body, so that the battery module and the box body can be fixed conveniently, and the stability of the battery module is improved. The connecting piece is simple in structure, consumption of consumables can be reduced, the production cost of the connecting piece is reduced, the connecting piece is connected to the side face of the box body, the connecting piece does not share the weight of the energy