ENERGY STORAGE SYSTEM, PHYSICAL POSITION IDENTIFICATION METHOD, AND PHOTOVOLTAIC POWER GENERATION SYSTEM

This application provides an energy storage system, a physical position identification method, and a photovoltaic power generation system, and relates to the field of energy storage system technologies. The energy storage system includes at least one energy storage container, and the energy storage container includes a battery management system and m battery clusters. Third controllers corresponding to n battery packs in each battery cluster determine a first third controller connected in series, and set a physical position of the first third controller to a first physical position. An ith third controller in the third controllers corresponding to the n battery packs in each battery cluster determines a physical position of the ith third controller based on a position signal sent by an (i-1)th third controller, where i=2, 3, ..., or n. A first controller determines physical positions of remaining second controllers according to a rapid spanning tree protocol (RSTP) and a known physical position of a second controller. This solution is used, so that a misoperation is avoided, and security and reliability of the battery management system are improved.