energy storage technology -Lithium - Ion Battery Equipment
In life, you may have come into contact with various electronic products, so you may not know some of its components, such as the energy storage battery it may contain, then let Xiaobian lead you to learn energy storage technology together . Energy storage devices composed of energy storage elements and grid access devices composed of power electronic devices have become two important parts of energy storage systems. Energy storage devices are important for enabling energy storage, release or fast power exchange. The power grid access equipment realizes the bidirectional energy transfer and conversion between the energy storage equipment and the power grid, and realizes functions such as peak regulation, energy adjustment, and improvement of power supply reliability and power system stability. The capacity range of energy storage systems is relatively wide, from tens of kilowatts to hundreds of megawatts; the discharge time span is very large, from milliseconds to hours; it has a wide range of applications in the entire power generation, transmission, distribution and power consumption systems scope. The research and application of large-scale energy storage technology has just begun. It is a brand-new subject and a research hotspot at home and abroad. At present, energy storage technologies mainly include physical energy storage (such as pumped hydro energy storage, compressed air energy storage, flywheel energy storage, etc.), chemical energy storage (such as various types of batteries, renewable fuel power lithium batteries, flow batteries, super capacitors, etc.) and electromagnetic energy storage (such as superconducting magnetic energy storage, etc.).
1) The most mature and widely used physical energy storage is pumped storage, which is mainly used for peak regulation, valley compensation, frequency regulation, phase regulation, and emergency backup of power systems. The release time of pumped hydro can vary from a few hours to a few days, and its energy conversion efficiency is between 70% and 85%. Pumped-storage power plants have a long construction period and are limited by topography. When the power station is far away from the power consumption area, the transmission loss is relatively large. Compressed air energy storage has been in use since 1978, but has not been widely promoted due to topographic and geological conditions. The flywheel energy storage device uses a motor to drive the flywheel to rotate at high speed, converts electrical energy into mechanical energy and stores it, and the flywheel drives the generator to generate electricity when needed. Flywheel energy storage is characterized by long life, no pollution, low maintenance, but low energy density, which can be used as a complement to battery systems. 2) There are many types of chemical energy storage with different technical development levels and application prospects: (1) Battery energy storage is currently the most mature and reliable energy storage technology. According to the different chemical substances used, it can be divided into lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, sodium-sulfur batteries, etc. Lead-acid battery technology has matured and can become a large-capacity storage system with low unit energy cost and system cost, and has good safety, reliability and reusability. It is also the most practical energy storage system available today. It has been used for small wind and photovoltaic power generation. It has been widely used in systems and small and medium-sized distributed power generation systems, but lead-acid batteries are not the future trend since lead is the source of heavy metal pollution. Advanced batteries such as lithium-ion, sodium-sulfur and nickel-metal hydride batteries are expensive, and large-capacity energy storage technology is not yet mature. The performance of this product currently does not meet the requirements of energy storage, and its economics cannot be commercialized. (2) Large-scale renewable fuel power cells have large investment, high price and low cycle conversion efficiency. They are currently not available for commercial energy storage systems. (3) The flow energy storage battery has the advantages of high energy conversion efficiency and low operation and maintenance cost. It is one of the technologies used for efficient, large-scale grid-connected power generation, energy storage and regulation. Flow energy storage technology has been used for demonstration in developed countries such as the United States, Germany, Japan and the United Kingdom. my country is still in the research and development stage. （Lithium - Ion Battery Equipment）
1) The most mature and widely used physical energy storage is pumped storage, which is mainly used for peak regulation, valley compensation, frequency regulation, phase regulation, and emergency backup of power systems. The release time of pumped hydro can vary from a few hours to a few days, and its energy conversion efficiency is between 70% and 85%. Pumped-storage power plants have a long construction period and are limited by topography. When the power station is far away from the power consumption area, the transmission loss is relatively large. Compressed air energy storage has been in use since 1978, but has not been widely promoted due to topographic and geological conditions. The flywheel energy storage device uses a motor to drive the flywheel to rotate at high speed, converts electrical energy into mechanical energy and stores it, and the flywheel drives the generator to generate electricity when needed. Flywheel energy storage is characterized by long life, no pollution, low maintenance, but low energy density, which can be used as a complement to battery systems. 2) There are many types of chemical energy storage with different technical development levels and application prospects: (1) Battery energy storage is currently the most mature and reliable energy storage technology. According to the different chemical substances used, it can be divided into lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, sodium-sulfur batteries, etc. Lead-acid battery technology has matured and can become a large-capacity storage system with low unit energy cost and system cost, and has good safety, reliability and reusability. It is also the most practical energy storage system available today. It has been used for small wind and photovoltaic power generation. It has been widely used in systems and small and medium-sized distributed power generation systems, but lead-acid batteries are not the future trend since lead is the source of heavy metal pollution. Advanced batteries such as lithium-ion, sodium-sulfur and nickel-metal hydride batteries are expensive, and large-capacity energy storage technology is not yet mature. The performance of this product currently does not meet the requirements of energy storage, and its economics cannot be commercialized. (2) Large-scale renewable fuel power cells have large investment, high price and low cycle conversion efficiency. They are currently not available for commercial energy storage systems. (3) The flow energy storage battery has the advantages of high energy conversion efficiency and low operation and maintenance cost. It is one of the technologies used for efficient, large-scale grid-connected power generation, energy storage and regulation. Flow energy storage technology has been used for demonstration in developed countries such as the United States, Germany, Japan and the United Kingdom. my country is still in the research and development stage. （Lithium - Ion Battery Equipment）
