RACK SYSTEM FOR BATTERY MODULE FOR ENERGY STORAGE

Disclosed is a rack system for power storage battery modules. The rack system includes a rack assembly configured in the form capable of defining an entire accommodation area, where a plurality of battery modules are accommodated in a multi-stage form; and a plurality of rail frames coupled to the multi stages of the rack assembly to support edges of the bottom surface of the battery modules, wherein each of the battery modules has a bottom surface on which rail fixing parts are provided corresponding to the longitudinal direction of the rail frames and have an elastic coupling projection at a location contacting the rail frames, and when the battery modules are installed, the battery modules are pressured toward the rail frames in a vertical direction to couple the rail fixing parts to the rail frames.