SHERIDAN, WYOMING – May 23, 2025 – BMW Group is driving innovation into the future by launching its first test vehicle equipped with all-solid-state battery (ASSB) cells — a BMW i7 now operating on the roads around Munich. In partnership with U.S.-based battery developer Solid Power, the German automaker is taking a significant leap toward next-generation electric mobility.
A Breakthrough in EV Battery Innovation
The use of solid-state battery technology marks a turning point for electric vehicles (EVs), offering the potential for higher energy density, longer driving ranges, and reduced weight compared to conventional lithium-ion batteries.
“Solid Power is extremely proud that our partnership with BMW has resulted in the first demonstration of truly all-solid-state battery cells in a vehicle,” said John Van Scoter, President and Chief Executive Officer of Solid Power. “We believe in the promise of ASSB’s and continue to drive innovation of our sulfide electrolyte in support of that future for EV’s.”
The BMW i7 test car features large-format, sulfide-based ASSB cells provided by Solid Power, fully integrated into a concept battery that merges proven Gen5 design principles with new, advanced module concepts.
What This Means for Drivers
For consumers, the promise of all-solid-state batteries translates to meaningful benefits:
- Longer Range: Higher energy density can support extended travel on a single charge.
- More Space, Less Weight: Compact battery systems free up space without sacrificing performance.
- Improved Safety: Solid-state batteries are expected to offer enhanced thermal stability.
These factors collectively pave the way for a more practical, efficient, and safer EV experience—perfect for drivers looking for luxury and sustainability in one seamless package.
Building on Nearly a Decade of Collaboration
BMW Group and Solid Power have been working together since 2016 through an extended joint development agreement. The partnership deepened in 2022, allowing BMW to run a prototype solid-state cell production line at its Cell Manufacturing Competence Center (CMCC) in Parsdorf, Germany. Here, BMW experts apply their growing battery expertise—honed since 2008 and centralized since 2019 at the Battery Cell Competence Center in Munich.
“Our BMW i7 ASSB test vehicle on the road is a perfect example of the BMW Group's technology-open mindset,” said Martin Schuster, Vice President Battery Cell and Cell Module at the BMW Group. “We are continuously advancing the development of new battery cell technologies and are constantly expanding our know-how with valuable partners such as Solid Power.”
What Comes Next
While the BMW i7 equipped with ASSB cells is currently a test vehicle, it represents a key step in preparing the technology for wider use. The ongoing test program will examine:
- Expansion behavior of solid-state cells
- Operating pressure management
- Optimal thermal conditions for performance and safety
The insights gathered will accelerate BMW’s ability to bring production-ready solid-state batteries to market in the near future.
A Strategic Investment in the Future
The BMW Group’s extensive global footprint—including its Spartanburg plant in South Carolina and R&D centers in California—supports over 120,000 U.S. jobs and contributes more than $43.3 billion to the U.S. economy each year. Its commitment to next-generation battery technology ensures it remains a leader in premium EV innovation.
Consumers eager for cleaner, longer-lasting, and more efficient electric driving experiences can look forward to seeing the benefits of this cutting-edge battery technology reflected in future BMW models.
Learn more at bmwusa.com or solidpowerbattery.com.