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Energy Storage News:

Used lithium-ion batteries taken from carmaker Audi’s electric vehicles (EVs) have been repurposed into a ‘second-life’ stationary energy storage system by energy company RWE at a project in Herdecke, Germany. 

RWE has deployed the system, which has a capacity of around 4.5MWh, at the site of its pumped hydro energy storage (PHES) plant at Hengsteysee reservoir in the North-Rhine Westphalia region of north-west Germany. 

The decommissioned batteries are taken from development models of Audi’s e-tron EVs, which have a maximum range of 252 miles when used for transport. They still had about 80% of their residual capacity remaining when taken out of use, RWE said in a press release issued just before the end of last year.

In their second-life as components in a battery energy storage system (BESS), the batteries could be usable for up to 10 years and their low cost is an advantage over using brand new devices, RWE said.

[Andy Colthorpe]

More: Decommissioned Audi EV batteries used in 4.5MWh stationary energy storage system in Germany

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