Energy storage is mainly used in power grid transmission and distribution and auxiliary services, renewable energy grid connection, distributed and micro-grid, and various parts of the user side.

In terms of power grid transmission and distribution and auxiliary services, the main role of energy storage technology is to shave the power grid, load, start and alleviate transmission congestion, and delay the upgrade of the transmission network and distribution network;

In terms of grid connection of renewable energy, energy storage is mainly used to smooth the output of renewable energy, absorb excess power to reduce "abandoning wind and light" and instant grid connection;

In terms of distributed and microgrids, energy storage is mainly used to stabilize system output, serve as a backup power supply, and improve scheduling flexibility; on the user side, energy storage is mainly used for industrial and commercial peak-shaving and valley-filling, demand-side response, and energy cost management.