Introduction to main application fields of lithium iron phosphate battery

1. Application of new energy vehicle industry

Lithium iron phosphate battery is widely used in passenger cars, buses, logistics vehicles, low-speed electric vehicles and so on because of its safety, low cost and other advantages. In the current field of new energy passenger vehicles, affected by the national subsidy policy for new energy vehicles, ternary batteries once occupied a dominant position with the advantage of energy density, but lithium iron phosphate batteries still occupied an irreplaceable advantage in passenger cars, logistics vehicles and other fields. According to the latest data, lithium iron phosphate batteries account for more than half of the total battery shipments.

2. Application of energy storage market

With the rise of the energy storage market, in recent years, some power battery enterprises have deployed energy storage business to open up new application markets for lithium iron phosphate batteries. On the one hand, due to its ultra long life, safe use, large capacity, green environment and other characteristics, lithium iron phosphate 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 matched with lithium iron phosphate battery has become the mainstream choice in the market. It is reported that lithium iron phosphate battery has been used in electric buses, electric trucks, user side and grid side FM.

Lithium iron phosphate battery has 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. It also supports stepless expansion and is suitable for large-scale electric energy storage. It has good application prospects in the fields of safe grid connection of renewable energy power stations, grid peak shaving, distributed power stations, UPS power supply, emergency power supply system, etc.

(1) Wind power generation, photovoltaic power generation and other renewable energy power generation are safely connected to the grid. The inherent characteristics of wind power generation, such as randomness, intermittency and volatility, 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 wind power industry, especially the majority of wind farms in China belong to "large-scale centralized development and long-distance transmission", grid connected power generation of large-scale wind farms poses a severe challenge to the operation and control of the large power grid.

Photovoltaic power generation is affected by environmental temperature, sunlight intensity and weather conditions. Photovoltaic power generation is characterized by random fluctuations. Our country presents the development trend of "decentralized development, local low-voltage access" and "large-scale development, medium and high voltage access", which puts forward higher requirements for peak shaving of power grid and safe operation of power system.

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

(2)Distributed power stations. The defects of large power grids make it difficult to guarantee the quality, efficiency, security and reliability of power supply. For important units and enterprises, dual power supplies or even multiple power supplies are often required as backup and guarantee. The lithium iron phosphate battery energy storage system can reduce or avoid power outages caused by grid failures and various accidents, and plays an important role in ensuring safe and reliable power supply for hospitals, banks, command and control centers, data processing centers, chemical material industries, precision manufacturing industries, etc.

(3) Power grid peak shaving. Pumped storage power plants have always been the main means of peak shaving in power grids. As the pumped storage power station needs to build upper and lower reservoirs, it is difficult to build in the plain area due to the geographical conditions. It also covers a large area and has high maintenance costs. The lithium iron phosphate battery energy storage system is used to replace the pumped storage power station, which will play an important role in the peak load regulation process of the power grid, free from geographical conditions, free location, less investment, less land occupation, and low maintenance cost.

(4) UPS power supply. With the continuous and rapid development of China‘s economy, the demand for UPS power users is decentralized, which makes more industries and enterprises have a continuous demand for UPS power.

Compared with lead-acid battery, lithium iron phosphate battery has the advantages of long cycle life, safety and stability, environmental protection, low self discharge rate, etc. With the continuous maturity of integrated technology and the continuous reduction of cost, lithium iron phosphate battery will be widely used in UPS power battery.

3. Application on starting power supply

In addition to the characteristics of power lithium battery, the starting type lithium iron phosphate battery also has the capability of instantaneous high power output. The power lithium battery with energy less than one kilowatt hour is used to replace the traditional lead-acid battery, and the BSG motor is used to replace the traditional starting motor and generator. It not only has the function of starting and stopping at idle speed, but also has the functions of engine stopping and coasting, coasting and braking energy recovery, acceleration assistance and electric cruise.

4. Applications in other fields

Lithium iron phosphate battery is also widely used in the military field because of its good cycle life, safety, low temperature performance and other advantages. On October 10, 2018, a battery enterprise in Shandong made a strong appearance in the first Qingdao Military civilian Integration Technology Innovation Achievement Exhibition, which exhibited military products including - 45 ℃ military ultra-low temperature batteries.

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