Energy storage device, power utilization system and energy storage system

The invention relates to an energy storage device, a power utilization system and an energy storage system.The energy storage device comprises an energy storage module, a liquid cooling plate, a fixing assembly and an adjusting part, and the energy storage module comprises a plurality of energy storage single bodies arranged in the first direction; the liquid cooling plate is arranged on one side of the energy storage module and is provided with a groove facing the surface of the energy storage module; the fixing assembly comprises two end plates, a bandage and a fixing piece, the two end plates are arranged on the two sides of the energy storage module in the first direction, and the bandage is arranged around the peripheries of the energy storage module and the end plates; the fixing piece penetrates through the end plate; the adjusting piece is arranged on the periphery of the fixing piece in a penetrating mode and connected with the end plate in a swinging mode, the adjusting piece is partially located be