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Mercedes-Benz tests solid-state battery with 620-mile range
Pack developed by Mercedes-Benz and US-based Factorial Energy, with prototype work carried out in the UK
The technology being trialled in the EQS prototype marks an initial step towards a more advanced solid-state battery, internally codenamed Solstice, which Mercedes-Benz and Factorial Energy are jointly developing. The next-generation unit replaces the polymer separator with a sulphide-based solid electrolyte, targeting an energy density of 450Wh/kg and an estimated 80% range increase over today’s lithium ion batteries. Mercedes-Benz’s confirmation that it is testing solid-state battery technology in a modified EQS is expected to precede the launch of a new development concept, following the approach taken with the EQXX, which was unveiled in 2022.
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