Image: Energy storage in China’s southern power grid
China Southern Power Grid Energy Storage, the energy storage division of China Southern Power Grid, has put into operation a 10 MWh sodium ion battery storage station in Nanning, southwest China.
The company said the facility is the first large-scale project of its kind in China, and the first phase of a 100 MWh global project.
“China has put into operation the first large-scale storage station with sodium-ion batteries, marking a new era for low-cost batteries for large-scale use,” China Southern Power Grid said in a statement.
The 10 MWh sodium ion battery energy storage station features 210 Ah sodium ion battery cells that the company says can charge up to 90% in 12 minutes. The system consists of 22,000 cells.
“Compared to lithium-ion batteries, the raw material resources of sodium-ion batteries are abundant, easy to extract, cheap and perform better at low temperatures. So they have clear advantages for large-scale energy storage,” the company said. “With these batteries, storage costs can be reduced by 20% to 30%, and the cost per kilowatt hour of electricity can be reduced to CNY 0.2 ($0.0276).”
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