The importance of lithium-ion battery energy storage technology refers to the storage of electrical energy. The stored energy can be used as emergency energy, or stored energy when the grid is under low load, and output energy when the grid is under high load, for peak shaving and valley filling, reducing grid fluctuations.
So far, in response to different fields and different needs, people have proposed and developed a variety of energy storage technologies to meet applications, and lithium-ion battery energy storage is currently the most feasible technical route. From the perspective of the economics of energy storage technology , Lithium-ion batteries have strong competitiveness, while sodium-sulfur batteries and vanadium redox flow batteries have not been industrialized yet, with limited supply channels and high costs. In terms of operation and maintenance costs, sodium-sulfur batteries need continuous heating, vanadium redox batteries need pumps for fluid control, which increases operating costs, and lithium-ion batteries require almost no maintenance.
Public data shows that there are 20 lithium-ion battery energy storage projects in my country, with a total installed capacity of 39.575 MW. Energy storage is one of the important means to solve the intermittent fluctuations of new energy wind power and photovoltaics and realize the function of "peak cutting and flat valley". As a new application scenario, energy storage lithium-ion batteries have received more and more attention. Lithium-ion batteries are a very important energy storage technology, which is widely used in portable electronic devices and new energy vehicles. The world's energy storage batteries Costs are continuing to drop. However, in the future, energy storage will shift from lithium-ion batteries to more innovative solutions.
The application scenarios of lithium-ion batteries in the fields of energy storage power supply side, user side, and grid side are as follows: Energy storage applications on the power generation side include optical storage power stations, wind energy storage power stations, and AGC frequency modulation power stations; user-side energy storage uses optical storage charging stations, households Energy storage and backup power are the main ones; grid energy storage includes scenarios such as substation energy storage, virtual power plants, peak shaving/frequency modulation and other scenarios.
There are currently two mainstream energy storage lithium-ion batteries: ternary lithium and lithium iron phosphate, both of which have much higher power densities than lead-carbon batteries. Relatively speaking, ternary lithium is higher than lithium iron phosphate.
With the development of electromagnetic emission technology, energy storage has become an indispensable part. The demand for basic energy storage units is analyzed. Take the power and energy requirements of the power system as the traction, and take the optimal suitability of the energy storage system's volume and weight as the goal. By fully comparing the existing battery parameters, comprehensively considering safety, power density, energy density and cycle life, determine the basic The type of energy storage unit is a lithium ion battery.