VW validates lithium metal solid state battery performance
A lithium metal solid state battery from QuantumScape has achieved more than 1,000 charging cycles with still more than 95 percent capacity in testing at PowerCo, the battery company of Volkswagen.
US startup QuantumScape has recently reached an important milestone for its solid state battery technology. Tests at PowerCo’s battery laboratories in Salzgitter, Germany, showed the A sample of the anode free lithium metal cell successfully completed more than 1,000 charging cycles.
The cell consists of 24 layers and corresponds to the battery cell planned for series production. The next step is to perfect and scale the manufacturing processes and the solid state battery can be used in Volkswagen’s existing unified cell concept.
VW is an investor in QuantumScape and the company also has a deal with Ford and the test results come as ProLogium is set to ship a ceramic solid-state battery to car makers.
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For an electric car with a WLTP range of 500-600 kilometres, this corresponds to a total mileage of more than half a million kilometres. At the same time, the cell barely aged and still had 95 percent of its capacity (or discharge energy retention) at the end of the test.
“These are very encouraging results that impressively underpin the potential of the solid-state cell,” said PowerCo CEO Frank Blome. “The final result of this development could be a battery cell that enables long ranges, can be charged super-quickly and practically does not age. We are convinced of the solid-state cell and are continuing to work at full speed with our partner QuantumScape towards series production.”
The industry-standard targets for this development phase are 700 charging cycles and a maximum capacity loss of 20 percent. QuantumScape’s battery cell exceeded these specifications in the latest test and also supports fast-charging capability, safety and self-discharge.
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“These results from the Volkswagen Group’s PowerCo testing make clear that QuantumScape’s anodeless solid-state lithium-metal cells are capable of exceptional performance. While we have more work to do to bring this technology to market, we are not aware of any other automotive-format lithium-metal battery that has shown such high discharge energy retention over a comparable cycle count under similar conditions. We’re excited to be working closely with the Volkswagen Group and PowerCo to industrialize this technology and bring it to market as quickly as possible,” said Jagdeep Singh, Founder & CEO of QuantumScape.
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