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

An energy storage system is provided in this application, which 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 ithird controller in the third controllers corresponding to then battery packs in each battery cluster determines a physical position of the ithird controller based on a position signal sent by an (i−1)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.