It is reported that sodium salt batteries, also known as sodium-nickel batteries, are more secure, reliable, long cycle life, high specific energy and environmentally friendly than lithium-ion batteries and lead-acid batteries, and are considered as a new energy storage technology suitable for new energy grid-connected, distributed generation and micro-grid. On April 1, this year, Na-Ni battery was used in the energy storage system of communication base station of No. 6 monitoring pole of Zhijiang Road in Jianggan District of Hangzhou Unicom, Zhejiang Province, which became the first pilot project of Na-Ni battery energy storage in China.