Tray assembly, battery pack and electric equipment

The utility model discloses a tray assembly, a battery pack and electric equipment. The tray assembly comprises a box body and a composite layer, the composite layer is arranged in the box body, a buffer cavity is formed in the composite layer, and a heat insulation medium is arranged in the buffer cavity. According to the tray assembly, the composite layer is arranged in the box body, the buffering vibration reduction function and the heat preservation function of the tray assembly are achieved through the buffering cavity defined in the composite layer and the heat insulation medium in the buffering cavity, additional protection plates and heat preservation structures do not need to be arranged, the process complexity is reduced, and the light weight of the tray assembly is achieved.