Lithium ion battery energy storage device is an important infrastructure for the sustainable and stable development of the new energy industry, an important means to meet the large-scale access of renewable energy, and an important part of the distributed energy system and electric vehicle industry.

Energy storage is an important component and key supporting technology of smart grid, renewable energy energy system with a high proportion, and energy Internet. The development of lithium-ion battery energy storage technology is of great significance in improving energy utilization efficiency and improving the stability of power grid operation. With the continuous development of power electronic devices and energy Internet technology, the application of energy storage technology will be more common in the future.

Lithium ion iron phosphate battery is a more suitable technical route for energy storage among all kinds of lithium ion batteries at the present stage, and most of the lithium energy storage projects that have been invested and built also use this technology. At present, the price of lithium iron phosphate battery from some manufacturers has dropped to 1200-1400 yuan/kWh, and the cost of the corresponding energy storage system has also dropped to 2000 yuan/kWh, greatly improving the economy of energy storage.

Whether it is the national level lithium ion battery energy storage demonstration project or the distributed energy storage, micro grid construction, etc., the application and commercialization of lithium ion battery energy storage are accelerating, and the share of lithium ion battery energy storage in the energy storage market is also growing. According to the plan currently released, the trend of rapid expansion of the output of important lithium ion battery manufacturers will continue in the next few years, and lithium battery energy storage will also enter the commercial application range with the decrease of cost.