Energy storage is the conversion of electrical energy into other forms of energy for storage. The basic method of energy storage is to convert electricity into other forms of energy and store them in the energy storage device, and release them when needed; according to the characteristics of energy conversion, electrical energy can be converted into kinetic energy, potential energy and chemical energy. The purpose of energy storage is mainly to realize the stable operation of power at the supply end, transmission end, and user end.

Specific application scenarios include:
(1) Applied in the fields of peak load shaving, load smoothing, and rapid adjustment of grid frequency to improve the stability and reliability of grid operation;
(2) Applied in the field of new energy power generation to reduce the impact of large instantaneous changes in photovoltaic and wind power generation systems on the power grid, and reduce the phenomenon of "abandoning light and wind";
(3) Applied to new energy vehicle charging stations, reducing the impact of large-scale instantaneous charging of new energy vehicles on the power grid, and can also enjoy the power price difference between peaks and valleys.