The development of the new energy industry has gradually revealed the value of energy storage. As the main growth point of electrochemical energy storage, lithium batteries account for 75% of the scale of chemical energy storage. In the long run, the energy storage field will be one of the important application markets for lithium batteries. The following is an introduction to the application and technical points of lithium-ion batteries in energy storage scenarios.
A lithium-ion battery refers to a battery made of lithium-containing compounds, which mainly rely on lithium ions to move between the positive and negative electrodes to work. In the process of charging and discharging, there are only lithium ions, and there is no metal lithium. Compared with other batteries, the advantages of lithium batteries are high energy density, long cycle life, low self-discharge rate, high energy conversion rate, fast charge, and discharge, etc.
In the energy storage system, the functions of lithium batteries, lead-carbon batteries, and lead-acid batteries are all to store electrical energy. The biggest difference between lithium batteries and lead-acid batteries is that lithium batteries must be equipped with a battery management system.
At present, lithium battery technology mainly includes mainstream routes such as lithium iron phosphate, lithium titanate, and ternary lithium. The power density of these batteries is much higher than that of lead-carbon batteries.
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 cutting and flat valley". As an emerging application scenario, energy storage lithium batteries have gradually received attention.
It is understood that the application scenarios of lithium batteries on the power side, user side, and grid side of energy storage are as follows: energy storage applications on the power generation side include optical storage power stations, wind storage power stations, and AGC frequency modulation power stations; energy storage on the user side includes light storage and charging stations, household energy storage, backup power supply, etc.; grid energy storage uses substation energy storage, virtual power plant, peak shaving/frequency modulation, and other scenarios.
Energy storage lithium batteries have no direct requirements for energy density, but different energy storage scenarios have different requirements for the power density of energy storage lithium batteries. The application of lithium-ion batteries in the field of electric energy storage requires the battery to have the characteristics of safety, long life, and high energy conversion efficiency. The cycle life is generally required to be greater than 3,500 times.
For power peak shaving, off-grid photovoltaic energy storage, or user-side peak-to-valley energy storage scenarios, the energy storage battery is generally required to be continuously charged or continuously discharged for more than two hours, so it is suitable to use a capacity battery with a charge-discharge rate ≤0.5C.
For energy storage scenarios with power frequency modulation or smoothing of renewable energy fluctuations, the energy storage battery needs to be quickly charged and discharged in a time period of seconds to minutes, which is suitable for applications with ≥2C power batteries; and at the same time, it needs to undertake frequency modulation and peak regulation. Application scenarios are more suitable for energy batteries.
Unlike the field of new energy vehicles, the energy storage market’s demand for lithium batteries requires low cost and long life in addition to safety, and RENON continues to improve and explore these areas and can develop lithium-ion batteries that are more suitable for the field of energy storage. . If you want to know more about lithium batteries after reading the above, you can get a comprehensive solution by contacting us.
As a professional manufacturer of lithium battery products, RENON has a number of patents and independently developed technologies and is in a leading position in the industry. We are equipped with a professional quality inspection system that can control the quality of our products in an all-around way. At the same time, we will formulate effective solutions according to the actual needs of users. If you are interested in our products, please contact us immediately!