Embodiments of this application provide a box, a battery pack, and a device, and relate to the technical field of energy storage devices. The box includes a frame member, a fixing member, and a shielding member. The frame member is configured to form an accommodation cavity. The fixing member is configured to mount the box. The fixing member is connected to the frame member. The shielding member is configured to be connected to the frame member. The shielding member includes a hollow portion. At least a part of the fixing member is accommodated in the hollow portion. The battery pack includes the box and a battery accommodated in the accommodation cavity of the box. The device includes the battery pack, and the battery pack is configured to provide electrical energy.