Battery frame, power battery assembly and vehicle

The invention relates to the technical field of vehicle battery mounting brackets, and discloses a battery frame, a power battery assembly and a vehicle, the battery frame comprises: a frame body, the top surface and at least one side surface are opened; the bearing structure is arranged in the frame body so as to divide the interior of the frame body into at least two layers of containing spaces in the vertical direction and divide the opening in the side face into at least two branch openings; the side trusses are detachably connected with the frame body and arranged corresponding to the branch openings, and the side trusses are detachably connected to the lower portion of each layer of bearing structure; and the upper cover plate is detachably connected with the frame body and corresponds to the opening in the top surface. When each layer of battery is disassembled and assembled, a disassembling and assembling space exists in the height direction of the battery, a space does not need to be reserved in a ba