Module support of cylindrical battery, battery pack and installation method

The invention belongs to the technical field of battery box products, and provides a module support of a cylindrical battery, a battery pack and an installation method. The module support comprises a body, battery cell fixing grooves which are arranged in a staggered mode and used for fixing cylindrical battery cells are formed in the body, and convex clamping grooves and concave clamping grooves are formed in the two side edges of the body respectively; the convex clamping grooves and the concave clamping grooves are spliced and combined, module brackets of a plurality of cylindrical batteries can be spliced into a large-size module bracket, each cylindrical battery cell is mounted in the battery cell fixing groove to form an integral battery pack, and the whole battery pack is fixed on the water cooling plate by utilizing the module fixing holes. The number of accessories is smaller, the light weight of the battery module can be realized, the weight and cost are reduced, and the space utilization rate in th