The automotive industry has been discussing the pros and cons of solid-state batteries for EV’s for a decade and engineers have now been successful enough to take the new battery onto the road.
Mercedes Benz developed and patented a new innovative solid-state battery pack together with UK based Mercedes AMG High Performance Powertrains (HPP). After extensive test bench trials, the solid-state battery pack, with cells from U.S.-based solid-state battery leader Factorial Energy, was installed into a slightly modified EQS Sedan model. The first road tests started in February.
“Developing an automotive-scale solid-state battery underlines our commitment to innovation and sustainability. We will gain crucial insights into possible series integration of this cutting-edge battery technology,” said Markus Schäfer, Chief Technology Officer, Development & Procurement and member of the Board of Management of Mercedes‑Benz Group AG.
“Being the first to successfully integrate lithium-metal solid-state batteries into a production vehicle platform marks a historic achievement in electric mobility. This demonstrates that solid-state battery technology has moved beyond the laboratory and into real-world application. Our collaboration with Mercedes-Benz proves that the future of electric vehicles is not just a vision, but a reality we’re delivering today,” commented Siyu Huang, CEO and Co-Founder of Factorial Energy.
The solid-state battery from Mercedes-Benz features an innovative floating cell carrier. When the battery charges, the materials expand, and when it discharges, it contracts. To support the cells during these volume changes, the battery is equipped with pneumatic actuators that interact with the cell volume change during charging and discharging, which affects the battery’s performance and lifespan.
The solid-state battery in the EQS-based test vehicle allows for up to 25% more electric range compared to the same battery weight and size of a corresponding standard EQS battery. Additional weight and energy efficiency is achieved through passive battery cooling. The development vehicle is expected to have a range of over 621 miles.
