The energy storage of electrochemical energy storage has increased rapidly from 3.7%in 2018 to 7.5%in 2020 in recent years. The conditions for commercialization of the use of the following methods mainly include the following methods: lithium -ion battery energy storage, lead battery energy storage and liquid storage energy storage. Because electrochemical energy storage needs to consider life, safety, and economic costs, lithium -ion battery storage has high energy density, wide commercial application, continuous unit costs, and mature technology. The dominant position of electrochemical energy storage. According to data, as of the end of 2020, lithium -ion batteries accounted for 92%of electrical chemical energy storage capacity, and sodium sulfur batteries and lead batteries accounted for 3.6%and 3.5%, respectively. At present, lithium ion storage energy mainly uses lithium iron phosphate battery technology

The energy storage market is huge, and with the advancement of technological, the energy storage method will also change slowly. In the future, representative energy storage technologies include superconducting energy storage and supercapacitors