18650 lithium battery cells manufacturers analyze the application of lithium-ion battery energy storage technology

　　18650 lithium battery cells manufacturers analyze the applications of lithium-ion battery energy storage technology. With the development of society, my country's demand for energy continues to grow. Foreign countries attach great importance to the research and development of large-scale energy storage systems, and my country also attaches great importance to the development of energy storage technology. So far, for different fields and different needs, people have proposed and developed a variety of energy storage technologies to meet the applications. Lithium-ion battery energy storage is currently the most feasible technical route.

　　Principles of lithium-ion battery energy storage technology

　　Energy storage technology refers to a series of related technologies that store electrical energy through physical or chemical methods and release it when needed. Generally speaking, according to different storage methods, it can be classified into mechanical energy storage, electromagnetic energy storage and electrochemical energy storage. Mechanical energy storage can be divided into pumped water energy storage, compressed air energy storage, and flywheel energy storage. Electromagnetic energy storage mainly includes superconducting magnetic energy storage and supercapacitor energy storage. The method of electrochemical energy storage is to store and release electrical energy in the form of chemical energy. Current electrochemical energy storage mainly includes batteries and electrochemical capacitor devices to achieve energy storage. Commonly used batteries include lead-acid batteries, lead-carbon batteries, sodium-sulfur batteries, flow batteries, lithium-ion batteries, etc. Electrochemical energy storage technology has the advantages of high efficiency, application flexibility, and fast response speed and is gradually occupying an increasingly important position in the power energy storage market.

　　Application of lithium-ion battery energy storage technology

　　Different energy storage technologies have different performance characteristics and are suitable for different applications and fields. According to the system power and discharge time of different energy storage technologies, the main application areas of energy storage technology can be divided into three parts: energy management, power bridging and power quality management. At the same time, some energy storage technologies also have certain potential for application in other aspects of the power grid, such as chemical energy storage technologies such as lead-acid batteries, lithium batteries, flow batteries, sodium-sulfur batteries, and high-energy supercapacitors. The system power range is generally from kilowatts to 10MW level, and the discharge time is mostly minutes, so it is mainly used in the field of power bridging. Flywheel, supercapacitor and superconducting energy storage technologies are generally used in the field of power quality management because of their fast response and small system power and discharge time. They have good flexibility.

　　Specifically, energy storage technology has different applications in all aspects of power generation, transmission, distribution, and use. On the power generation side, traditional power generation can assist in dynamic operation, replace or delay the construction of new units; in renewable energy power generation The field is mainly used for peak shaving and valley filling, tracking planned output and ramp rate control; the main applications in the field of power transmission and distribution include reactive power support, link line blocking, delaying power transmission and distribution expansion and upgrade, and as a DC power supply for substations; in power grid auxiliary The main applications in the service field include frequency regulation, voltage support, peak shaving and backup capacity. At the same time, energy storage technology can be used on the user side to manage time-of-use electricity prices and capacity charges, improve power reliability and power quality, etc.

　　Application status of lithium-ion battery energy storage technology

　　At present, countries around the world have invested a lot of manpower and material resources in the research of large-scale battery energy storage technology. In recent years, a large number of large-scale battery energy storage power stations have been built continuously at home and abroad. Western countries represented by the United States have invested heavily in the construction of large-scale battery energy storage power stations in recent years. The United States has established a large number of energy storage power stations with different energy storage forms in states such as California and Pennsylvania. Their applications cover power generation, ancillary services, transmission and distribution. It also classifies and defines the functions and roles of different energy storage power stations, providing guidance for the development of large-scale energy storage power stations around the world. Pointed out the direction.

　　A lot of research work has been carried out in China based on large-scale battery energy storage technology. A number of demonstration projects have been built and carried out in the fields of large-scale renewable energy power generation bases, power transmission and distribution and user side, as well as distributed power generation and microgrids. He has conducted many research works such as energy storage system capacity configuration and control strategies, and has achieved many research results.

　　Lithium-ion battery energy storage technology market development

　　The scale of new energy installed capacity will contribute 90% of the increase in energy consumption. The power of supporting energy storage devices is calculated based on 15% of the installed capacity of wind power and photovoltaic. By 2030, the demand for energy storage batteries is expected to reach 850 million kWh, measured in units of kilowatt hours. Calculating the price of an energy system (18650 lithium battery cells) of 1,200 yuan, China’s wind and solar energy storage market is expected to reach 1 trillion yuan (RMB).

　　From the current application fields, the three major areas of energy storage are: large-scale wind and solar energy storage, backup power supply for communication base stations, and home energy storage. Among them, the field of backup power supply for communication base stations currently accounts for a large proportion. With the "energy home" wave set off by Tesla, household energy storage has greater room for further development and expansion. Large-scale wind and solar energy storage does not seem to have much momentum in the short term.

　　Energy is an important material basis for human survival and social development, and an important cornerstone of the national economy, national security and sustainable development. As a powerhouse in new energy, China's new energy industry has developed rapidly in recent years, and the field of energy storage has been closely watched. Faced with huge market demand and potential, domestic energy storage companies are like sleeping lions, ready to take off.

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