Supporting assembly, battery module and battery pack

The invention relates to the technical field of energy storage, and provides a supporting assembly, a battery module and a battery pack, and the supporting assembly comprises a bracket, a bottom plate and a top plate. The support is provided with a supporting part, and the support is configured to be installed on a box body cross beam. The bottom plate is connected to the supporting part. The top plate is connected with the bottom plate, a mounting cavity is formed between the top plate and the bottom plate, and the mounting cavity is configured to mount a battery module. The bottom plate is connected through the supporting part constructed on the bracket, and the bottom plate is connected with the top plate, so that a welding forming mode of a plurality of parts in the related technology is replaced. Therefore, the supporting assembly can be produced and formed only through the support, the bottom plate and the top plate, the number of the parts of the supporting assembly can be reduced, the overall producti