![]() Opening up a second life for batteries improves both the environmental and the economic value we draw from those resources before they need recycling. “Automotive batteries deliver some great environmental benefits, but they consume a lot of resources in doing so. Professor David Greenwood from WMG, University of Warwick comments: More crucially, the packs can be used for storage allowing increased intermittent renewable energy sources on the grid, without putting security of supply at risk. Graded second-life battery packs can provide reliable and convenient energy storage options to a range of customers: from electric roaming products – providing electricity for customers on the move, to home storage products – enabling customers with solar panels to store their energy generated. In addition, the team at WMG developed ways of grading modules – the sub-components of battery packs in as little as 3 minutes – a process which previously took over 3 hours. This methodology, which was initially developed in WMG, was successfully transferred to a pilot second-life facility, where the target of 1MWh of second-life energy storage was achieved. WMG’s battery technology experts in the Energy Innovation Centre developed a safe, robust and fast methodology for used automotive Lithium-ion batteries, at pack level. Part-funded by BEIS (Business, Energy and Industrial Strategy) the ‘UK Energy Storage Laboratory’ project was launched, where 50 Nissan LEAF batteries were used to develop the existing grading process led by Nissan, WMG at the University of Warwick, AMETEK and Element Energy. They were challenged to demonstrate 1MWh of energy storage by the end of 2019. This grading process is traditionally a long and expensive process.Ĭar company Nissan were keen to explore ways to make a much faster grading process for their used Li-ion batteries from the Nissan LEAF – allowing re-use of old battery packs or modules instead of disposing or recycling them. To do this, it is necessary to “grade” the used batteries – identifying those suitable for use as spare parts, those suitable for “second life”, and those suitable for recycling of materials. However many automotive Lithium-ion (Li-ion) batteries have enough life left in them after the car is scrapped for ‘second-life’ uses both domestically and industrially. Once EV batteries have fulfilled their life-span for automotive applications, they are usually recycled by the manufacturer. The ability to reuse high numbers of Electric Vehicle Lithium Ion batteries for domestic and industrial use is becoming a reality for Nissan thanks to a new grading system developed by researchers at WMG, University of Warwick. Nissan trialled the process with used Nissan LEAF batteries in the UK A new fast grading process has been developed by researchers at WMG, University of Warwick for Nissan. To make the batteries available for ‘second-life’ they need to be graded – traditionally a long and expensive process. ![]() After this, they can be reused for less demanding “second life” applications such as domestic and industrial energy storage ![]() When electric vehicles end their life the remaining storage capacity of the lithium battery is expected to be higher than 70%. ![]()
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