Lithium iron phosphate (LFP) energy storage batteries are the mainstream cell solution for grid-side energy storage power stations with high safety, long cycle life and low cost. Large independent energy storage stations and wind-solar supporting energy storage widely adopt such batteries to realize peak load shifting, frequency regulation and standby capacity. Wind and solar power generation is intermittent; energy storage systems store surplus green power and release it smoothly during peak demand, greatly cutting wind and solar curtailment rates. LFP batteries feature outstanding thermal stability, suitable for hundreds of megawatt centralized deployment and lower fire risks of large-scale storage. They improve new power systems, support grid connection of massive renewable energy, and serve as essential carriers for modern power grids.