Lithium-ion battery energy storage technology mainly refers to the storage of electrical energy. The stored energy can be used as emergency energy, and can also be used to store energy when the grid load is low, and output energy when the grid load is high, which can be used to shave peaks and fill valleys to reduce grid fluctuations.
Lithium-ion batteries refer to accumulators made of lithium-containing compounds, which mainly rely on the movement of lithium ions between the positive and negative electrodes to work. In addition to being a powerful lithium battery, lithium-ion batteries can also be used as energy storage batteries. Due to the safety of lithium-ion batteries, most energy storage power stations choose lithium ferrous phosphate batteries as energy storage batteries.
Lithium-ion batteries are the most common energy storage technology on the market today and are widely used in various personal electronic products, mobile devices, and even in-vehicle batteries for electric vehicles. Generally speaking, the lithium battery refers to the lithium-ion battery, which is generally divided into energy storage lithium battery and power lithium battery according to the purpose.
Energy storage lithium batteries are used in photovoltaics or UPS, with relatively large internal resistance and slow charging and discharging speed, generally 0.5-1C. Power batteries are generally used in electric vehicles, with small internal resistance and fast charging and discharging speed, generally reaching 3-5C, the price is about 1.5 times more expensive than the energy storage battery.
Lithium-ion batteries work primarily by the movement of lithium ions between the positive and negative electrodes. In the process of charging and discharging, there are only lithium ions, but there is no metal lithium. Compared with other batteries, lithium batteries have the advantages of high energy density, long cycle life, low self-discharge rate, high energy conversion rate, and rapid charge and discharge.
However, lithium-ion battery energy storage power stations are generally used in new energy power stations and relatively few in traditional power stations. Due to the unstable voltage and uncertain timing of wind and solar power generation, using energy storage stations as power relays is more conducive to healthy grid operation.
At present, the hot lithium titanate material is also worthy of attention. It can replace graphite as anode material. Although the energy density is not high, lithium titanate can enable the battery to achieve a high rate of charge and discharge and has excellent safety performance and long cycle life.
It is understood that the application scenarios of lithium batteries on the power supply side, user side, and grid side of energy storage are as follows: energy storage applications on the power generation side include solar energy storage power stations, wind storage power stations, and AGC frequency modulation power stations; user-side energy storage focuses on solar energy storage. Storage and charging stations, household energy storage, backup power supply, etc.; grid energy storage is used in substation energy storage, virtual power plants, peak shaving/frequency regulation, and other scenarios.
So far, for different fields and different needs, people have proposed and developed a variety of energy storage technologies to meet the application, and lithium-ion battery energy storage is currently the most feasible technical route.
From the perspective of the economy of energy storage technology, lithium-ion batteries have strong competitiveness, and sodium-sulfur batteries and vanadium flow batteries have not been industrialized, so the supply channels are limited and the cost is expensive. From the perspective of operation and maintenance costs, sodium-sulfur batteries require continuous heating, vanadium flow batteries require pumps for fluid control, which increases operating costs, while lithium-ion batteries require almost no maintenance.
According to public data, there are 20 lithium-ion battery energy storage projects in my country, with a total installed capacity of 39.575MW. Energy storage is one of the important means to solve the intermittent volatility of new energy wind power and photovoltaics and realize the function of peak-shaving and valley-shaving.
Lithium-ion batteries are a very important energy storage technology, widely used in portable electronic devices and new energy vehicles, and the cost of energy storage batteries worldwide is continuing to decline. However, future energy storage methods will shift from lithium-ion batteries to a wealth of innovative solutions. If you are planning to purchase a lithium-ion energy storage system, please contact us.
RENON Power is a professional lithium-ion energy storage systems manufacturer. With independent research and development capabilities and a focus on ESS solutions, RENON is a leading supplier of BMS, ESS, modules, and monitoring systems. Our business scope integrates R&D, design, production, and sales. Based in the United States, it has several sales offices, product centers, joint venture factories, and wholly-owned subsidiaries around the world.