Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of the monomer is 3.2V, and the charge cut-off voltage is 3.6V~3.65V.
Application of lithium iron phosphate (LiFePO4) battery
1.Application of the new energy automobile industry
Lithium iron phosphate batteries are widely used in passenger cars, buses, logistics vehicles, low-speed electric vehicles, etc. due to their safety and low-cost advantages. Although, in the current new energy passenger vehicle field, it is subject to the state’s subsidy policy for new energy vehicles. Influence, relying on the advantages of energy density, ternary batteries occupy a dominant position, but lithium iron phosphate batteries still occupy an irreplaceable advantage in fields such as passenger cars and logistics vehicles. In the field of passenger cars, lithium iron phosphate batteries remain mainstream. In the field of special-purpose vehicles, the proportion of lithium iron phosphate batteries is gradually increasing. The use of lithium iron phosphate batteries in the extended-range electric vehicle market can not only improve the safety of vehicles, but also support the marketization of extended-range electric vehicles, eliminating the anxiety of pure electric vehicles such as mileage, safety, price, charging, and subsequent battery issues.
2. Start the application on the power supply
In addition to the power lithium battery characteristics, the starter lithium iron phosphate battery also has the ability of instantaneous high-power output. The traditional lead-acid battery is replaced by a powerful lithium battery with an energy of less than one kilowatt-hour, and the traditional starter motor and generator are replaced by a BSG motor. , It not only has the function of start and stop at idle speed, but also has the functions of engine stop coasting, coasting and braking energy recovery, acceleration assist, and electric cruise.
3. Application of energy storage market
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, and green environmental protection. It also supports stepless expansion and is suitable for large-scale electric energy storage. Energy power stations have good application prospects in such fields as safe grid connection, grid peak shaving, distributed power stations, UPS power supplies, and emergency power systems.
With the rise of the energy storage market, in recent years, some power battery companies have deployed energy storage business to open up new application markets for lithium iron phosphate batteries. On the one hand, due to the characteristics of ultra-long life, safe use, large capacity, and environmental protection, lithium iron phosphate can be transferred to the energy storage field, which will extend the value chain and promote the establishment of new business models. On the other hand, energy storage systems supporting lithium iron phosphate batteries have become a mainstream choice in the market. According to reports, lithium iron phosphate batteries have tried to be used in electric buses, electric trucks, user-side, and grid-side frequency modulation.
1) Safe grid connection of renewable energy power generation
The inherent randomness, intermittent news, 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 most wind farms in my country are “large-scale centralized development and long-distance transmission”, the grid-connected power generation of large-scale wind farms pose severe challenges to the operation and control of large-scale power grids.
Photovoltaic power generation is affected by ambient temperature, sunlight intensity, and weather conditions, and photovoltaic power generation has the characteristics of random fluctuations. my country presents a development trend of “decentralized development, low-voltage on-site access” and “large-scale development, medium, and high voltage access” simultaneously, which puts forward higher requirements for power grid peak shaving and safe operation of the power system.
Therefore, large-capacity energy storage products have become a key factor in solving the contradiction between the power grid and renewable energy power 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. Engineering applications have been carried out in the national wind and solar storage and transmission demonstration project, which will effectively improve equipment efficiency and solve Local voltage control problems, improve the reliability of renewable energy power generation and improve power quality so that renewable energy can become a continuous and stable power supply.
With the continuous expansion of capacity and scale and the continuous maturity of integrated technology, the cost of energy storage systems will be further reduced. After long-term safety and reliability tests, lithium iron phosphate battery energy storage systems are expected to be used in wind power, photovoltaic power generation, etc. Safe grid connection of energy power generation and improvement of power quality are widely used.
2) Lithium iron phosphate battery for grid peak shaving
The main method of power grid peak shaving has always been pumped storage power stations. As the pumped storage power station needs to build two reservoirs, the upper and lower reservoirs are restricted by geographical conditions, it is not easy to construct in plain areas, and it covers a large area and high maintenance cost. Use lithium iron phosphate battery energy storage system to replace pumped storage power station, cope with grid peak load, free of geographical conditions, freedom of location, less investment, less land occupation, low maintenance cost, and will play an important role in the process of power grid peak regulation.
3) Lithium iron phosphate battery for distributed power station
The shortcomings of large-scale power grids make it difficult to guarantee the quality, efficiency, safety, and reliability requirements of the power supply. For important units and enterprises, dual power supplies or even multiple power supplies are often required as backup and protection. Lithium iron phosphate battery energy storage system can reduce or avoid power outages caused by grid failures and various accidents, and ensure a safe and reliable power supply for hospitals, banks, command and control centers, data processing centers, chemical materials industries, and precision manufacturing industries. Play an important role.
4) Lithium iron phosphate battery for UPS power supply
The sustained and rapid development of China’s economy has brought about the decentralization of UPS power users’ demand, which has caused more industries and more enterprises to have a continuous demand for UPS power.
Compared with lead-acid batteries, lithium iron phosphate batteries have the advantages of long cycle life, safety and stability, environmental protection, and low self-discharge rate. With the continuous maturity of integration technology, the cost continues to decrease. Lithium iron phosphate batteries are used in UPS power batteries. Will be widely used.
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.