Lithium iron phosphate battery is a rechargeable battery, which uses lithium iron phosphate as cathode material, carbon material or graphite as cathode material, and organic solution or polymer as electrolyte. It has the advantages of high energy density, long cycle life, low self-discharge rate, and is not easy to burn. Lithium iron phosphate battery is a relatively safe lithium-ion battery, which is widely used in electric vehicles, energy storage systems, unmanned aerial vehicles and other fields.