Energy storage system lithium battery echelon cycle recovery system and recovery method

The invention belongs to the technical field of battery recycling, and particularly relates to an energy storage system lithium battery echelon recycling system which comprises a coarse crushing tank, a fine crushing tank, a grinding tank, crushing assemblies and screening assemblies, the crushing assemblies and the screening assemblies which are distributed in the vertical direction are arranged in the coarse crushing tank and the fine crushing tank correspondingly, and the screening assemblies are arranged in the grinding tank; the screening assembly comprises a rotationally-arranged inner screen drum and an outer screen drum which is arranged outside the inner screen drum and synchronously rotates along with the inner screen drum, and the position of the outer screen drum can be changed relative to the inner screen drum. According to the echelon recycling system for the lithium battery of the energy storage system, coarse crushing operation is carried out on a positive plate and graphite in a coarse crushi