Pipelines, Storage & Power

EWE to convert salt caverns into huge battery

The two German salt caverns were previously used to store gas but will now be made into a 700 MWh redox flow battery The two German salt caverns were previously used to store gas but will now be made into a 700 MWh redox flow battery.
By Silvia Favasuli 10 August 2017 0 27131
The two salt caverns at Jemgum in Germany were previously used to store gas. (EWE-Gassspiecher)

German energy company EWE plans to convert two salt caverns, currently used to store gas, into a battery. The battery will be the largest electrochemical storage device of its kind and the first to use a salt cavern. 

The caverns to be converted are part of an eight-cavern cluster at Jemgum in northwestern Germany. If successful, the project – known as brine4power – will be able to store 700 MWh of electricity, equivalent to one hour of Berlin’s energy consumption. 

It will use ‘redox flow’ battery technology,...