The definition of energy storage is the storage of various forms of energy.

　　According to the different forms of energy storage, it can be roughly divided into three types: electric energy storage, thermal energy storage and hydrogen energy storage. Among them, electric energy storage is the main energy storage method.

　　According to the different principles of storage, it can be divided into two types of technologies: Electrochemical Energy Storage and Mechanical Energy Storage.

　　Electrochemical Energy Storage refers to the energy storage of various secondary batteries, mainly including lithium-ion batteries, lead-acid batteries and sodium-sulfur batteries.

　　Mechanical Energy Storage mainly includes pumped water storage, compressed air energy storage and flywheel energy storage.

　　Electrochemical Energy Storage is currently the most widely used power storage technology with the greatest potential for development. Compared with pumped storage, Electrochemical Energy Storage is less affected by geographical conditions, has a short construction period, and can be flexibly used in various links of the power system and other various scenarios.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　In the future, as the scale effect of the lithium battery industry further manifests, the advantages of chemical energy storage technology will become more obvious, and it will gradually become the mainstream of the new energy storage market.