
The largest energy storage mine in China is the compressed air energy storage project by Zhongchu Guoneng Technology Co., Ltd. (ZCGN). It has a capacity of 300 MW/1,800 MWh and uses an underground salt cave1. Another large energy storage project in China, with 600 megawatts of molten salt thermal storage capacity, will be located in the CGD Group Golmud City solar thermal plant in 20232. Additionally, the Hubei Yingchang project, a 300MW/1,500MWh compressed air energy storage project, was built using abandoned salt mines in Hubei, China3. [pdf]
The facility can store more than 132 million kWh of electricity per year. The country's largest operational CAES system is currently a 60 MW plant built by Chinese state-owned energy group Huaneng, Tsinghua University, and China National Salt Industry Group in Changzhou, Jiangsu Province.
Chinese state-owned energy group Huaneng, Tsinghua University, and China National Salt Industry Group have commissioned the first salt cavern for compressed air energy storage in China. The Jiangsu Jintan Salt Cavern Compressed Air Energy Storage Project is located in Changzhou, Jiangsu province.
The Jiangsu Jintan Salt Cavern Compressed Air Energy Storage Project is located in Changzhou, Jiangsu province. It has a storage capacity of 300 MWh and a power generating capacity of 60 MW. The facility features a salt cavern, situated 1,000 meters underground and owned by China National Salt Industry Group.
But according to Asia Times, China is planning to lean heavily on compressed air energy storage (CAES) as well, to handle nearly a quarter of all the country's energy storage by 2030.
China does dominate the supply chain today, both in terms of battery manufacturing and lithium refining, but HiNa’s announcement pointed out that it only has about 6% of the world’s lithium reserves for mining, whereas it has abundant reserves of the minerals for sodium-ion batteries.
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