Lithium iron phosphate battery has a series of unique advantages such as high working voltage, high energy density, long cycle life, green environmental protection, etc., and supports stepless expansion, and can store large-scale electric energy after forming an energy storage system. The lithium iron phosphate battery energy storage system consists of a lithium iron phosphate battery pack, a battery management system (Battery Management System, BMS), a converter device (rectifier, inverter), a central monitoring system, a transformer, etc.Peak shifting and valley filling: release the electric energy stored in the battery to the load during the peak power consumption period, reducing the demand for the public grid; Take power from the public grid to charge the battery during the low power consumption period.The P-O bond in lithium iron phosphate crystal is stable and difficult to decompose. Even at high temperature or overcharge, it will not collapse and generate heat or form strong oxidizing substances like lithium cobalt oxide, so it has good safety.