07-31-2017, 01:02 AM
German gas storage firm is planning a battery big enough to power a city the size of Berlin for an hour, using redox flow technology. The planned project, which Oldenburg-based EWE Gasspeicher is billing as the world’s largest battery, will involve filling two salt caverns, each of around 100,000 cubic meters in volume, with brine to create a redox flow battery that has capacity of up to 120 megawatts and 700 megawatt-hours. EWE Gasspeicher currently uses caverns for natural-gas storage and is looking to bring the novel redox flow technology, called brine4power or b4p, to market by 2023. The project will be based on an experimental process, developed at the Friedrich Schiller University in Jena, Thuringia, which employs electrolytes based on recyclable polymers dissolved in salt water.
German Utility EWE Plans a Flow Battery Big Enough to Power Berlin for an Hour | Greentech Media