New Solid State Car Batteries from Mercedes-Benz
The future of electric vehicles is accelerating, and Mercedes-Benz is at the forefront of innovation. Mercedes-Benz of Scottsdale is excited to share the latest development in battery technology: the introduction of a groundbreaking solid-state battery, tested in a specially modified EQS Sedan. This breakthrough is the result of a collaboration between Mercedes-Benz passenger car engineers and the motorsport experts at Mercedes AMG High Performance Powertrains (HPP), a division known for its dominance in Formula 1. Join us as we discover the new solid state car batteries from Mercedes-Benz!
A Leap Forward in EV Performance and Efficiency
Mercedes-Benz EVs continue to push the boundaries of range, efficiency, and sustainability. Now, with the integration of new solid state car batteries, the brand is taking electrification to the next level. These cutting-edge batteries promise significant advancements in safety, weight reduction, and energy density.
Unlike conventional lithium-ion batteries, solid-state batteries use a solid electrolyte instead of a liquid one. This switch allows for improved thermal stability, reducing the risk of overheating and increasing overall safety. Additionally, the new technology supports lithium-metal anodes, delivering higher energy density, which translates to a potential 25% longer driving range.
The solid-state battery developed for this project was successfully installed in an EQS Sedan, which underwent its first real-world road tests in February 2025. Mercedes-Benz engineers and their Formula 1 counterparts worked closely with U.S.-based Factorial Energy to bring this revolutionary technology to life.
The Science Behind the Solid-State Advantage
One of the key benefits of this new EV technology is its ability to enhance energy storage while reducing weight. The solid-state battery has the potential to achieve an impressive gravimetric energy density of up to 450 Wh/kg at the cell level. This figure is a significant leap forward compared to traditional lithium-ion batteries, which typically range between 250 and 300 Wh/kg.
Gravimetric energy density measures the amount of energy stored per unit of battery weight. A higher energy density means the battery can store more power without increasing size or weight, directly improving an EV’s range and efficiency. The development vehicle based on the EQS platform is expected to reach over 621 miles on a single charge—marking a milestone in electric mobility.
Formula 1 Technology Meets Road-Ready Engineering
The partnership between Mercedes-Benz and HPP demonstrates how high-performance motorsport engineering can influence passenger car innovation. Formula 1 teams are known for rapid advancements in energy recovery, battery efficiency, and weight optimization—all of which are crucial for creating the best possible EVs for consumers.
HPP’s expertise allowed Mercedes-Benz engineers to design a new solid-state battery system featuring an innovative floating cell carrier. This unique feature accommodates the natural expansion and contraction of battery materials during charging and discharging, enhancing durability and longevity. To further optimize performance, pneumatic actuators interact with the battery cells, ensuring stable energy output and efficient charge cycles.
Moreover, passive cooling methods reduce the energy required to regulate battery temperature, contributing to the weight savings and efficiency gains. With these enhancements, Mercedes-Benz EVs equipped with solid-state batteries could become some of the best EVs for cold weather and long-range travel.
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What’s Next for Solid-State Battery Technology?
The introduction of new solid state car batteries in a real-world test vehicle marks an important step toward mass production. Over the coming months, Mercedes-Benz will conduct extensive testing to assess performance, reliability, and potential integration into future models.
This development is part of a broader strategy to revolutionize electric mobility. Mercedes-Benz initially partnered with Factorial Energy in 2021 to develop next-generation battery technology. In mid-2024, Factorial successfully delivered its lithium-metal solid-state battery cells to Mercedes-Benz, marking a major milestone in commercializing this technology.
The long-term vision is clear: solid-state batteries could power the next wave of Mercedes-Benz EVs, offering increased range, faster charging, and improved safety. As testing continues, insights gained from the EQS development vehicle will shape the future of electric driving.
The Road Ahead: Mercedes-Benz Leads the Way in New EV Battery Technology
Mercedes-Benz remains committed to pushing the limits of new EV technology, ensuring that future models provide exceptional performance and sustainability. With solid-state batteries now undergoing road tests, the transition toward more efficient and longer-range EVs is closer than ever.
As testing progresses, Mercedes-Benz of Scottsdale looks forward to sharing more updates on how this innovation will shape the next generation of electric vehicles. Stay tuned as the future of electrification unfolds on the road. As always, contact us for more information!
