Lithium iron phosphate batteries have a series of unique advantages such as high working voltage, high energy density, long cycle life, low self discharge rate, no memory effect, green environmental protection, etc. They also support stepless expansion and are suitable for large-scale energy storage. They have good application prospects in fields such as safe grid connection of renewable energy power stations, grid peak shaving, distributed power stations, UPS power supply, emergency power supply systems, etc.

　　According to the latest energy storage report released by international market research institution GTM Research, the application of grid side energy storage projects in China in 2018 has led to a continuous increase in the use of lithium iron phosphate batteries.

　　With the rise of the energy storage market, in recent years, some power battery companies have expanded their energy storage business to explore new application markets for lithium iron phosphate batteries. On the one hand, lithium iron phosphate, due to its ultra-long lifespan, safe use, large capacity, and green environmental protection, can be transferred to the energy storage field, which will extend the value chain and promote the establishment of a new business model. On the other hand, the energy storage system supporting lithium iron phosphate batteries has become the mainstream choice in the market. According to reports, lithium iron phosphate batteries have been attempted for use in electric buses, electric trucks, user side, and grid side frequency regulation.

　　1. Safe grid connection of renewable energy generation such as wind power and photovoltaic power. The inherent randomness, intermittency, and volatility of wind power generation determine that its large-scale development will inevitably have a significant impact on the safe operation of the power system. With the rapid development of the wind power industry, especially in China where most wind farms are "large-scale centralized development and long-distance transmission", the grid connected power generation of large-scale wind farms poses a serious challenge to the operation and control of the large power grid.

　　Photovoltaic power generation is influenced by environmental temperature, sunlight intensity, and weather conditions, and exhibits a random fluctuation characteristic. China is showing a development trend of "decentralized development, low voltage local access" and "large-scale development, medium to high voltage access", which puts forward higher requirements for peak shaving of the power grid and safe operation of the power system.

　　Therefore, high-capacity energy storage products have become a key factor in solving the contradiction between the power grid and renewable energy generation. The lithium iron phosphate battery energy storage system has the characteristics of fast working condition conversion, flexible operation mode, high efficiency, safety and environmental protection, and strong scalability. It has been applied in the national wind and solar energy storage and transmission demonstration project, which will effectively improve equipment efficiency, solve local voltage control problems, improve the reliability of renewable energy generation, and improve power quality, making renewable energy a continuous and stable power supply.

　　With the continuous expansion of capacity and scale, and the maturity of integrated technology, the cost of energy storage systems will be further reduced. After long-term testing of safety and reliability, lithium iron phosphate battery energy storage systems are expected to be widely applied in the safe grid connection and improvement of power quality of renewable energy generation such as wind power and photovoltaic power.

　　2. Peak shaving of the power grid. The main means of peak shaving in the power grid has always been pumped storage power plants. Due to the need to build two reservoirs, the upper and lower, for pumped storage power stations, which are greatly limited by geographical conditions, it is not easy to build them in plain areas, and they also occupy a large area with high maintenance costs. The use of lithium iron phosphate battery energy storage system to replace pumped storage power stations, in response to peak loads in the power grid, is not limited by geographical conditions, has free location selection, less investment, less land occupation, and low maintenance costs. It will play an important role in the peak shaving process of the power grid.

　　3 Distributed power plants. The inherent defects of large power grids make it difficult to ensure the quality, efficiency, safety and reliability requirements of power supply. For important units and enterprises, dual or even multiple power sources are often needed as backup and protection. The lithium iron phosphate battery energy storage system can reduce or avoid power outages caused by power grid failures and various unexpected events, and plays an important role in ensuring safe and reliable power supply in hospitals, banks, command and control centers, data processing centers, chemical materials industries, and precision manufacturing industries.

　　4 UPS power supply. The continuous and rapid development of the Chinese economy has led to the diversification of user demand for UPS power, resulting in a sustained demand for UPS power from more industries and enterprises.

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