The Race Toward Next-Gen EV Batteries
In the global race to advance electric vehicle (EV) technology, solid-state batteries are seen as the next big leap. All-solid-state batteries (ASSBs) promise higher energy density, improved safety, and better thermal stability compared to traditional lithium-ion batteries. Automakers worldwide are investing heavily in this technology, seeking lighter, longer-lasting, and faster-charging solutions. Among the leaders in this transformation is BMW Group, which has partnered with battery innovator Solid Power. Their joint work aims to push the limits of what EVs can do. A major milestone in their partnership has now been reached: the successful integration and road testing of ASSB cells in a BMW i7 sedan.
BMW and Solid Power’s Strong Technological Alliance
Since 2016, BMW Group and Solid Power have worked closely on solid-state battery technology. Their collaboration deepened in 2022 through a comprehensive technology transfer agreement. By the end of that year, BMW took another major step by preparing to operate its own solid-state battery prototype line at the Cell Manufacturing Competence Center in Parsdorf, Germany. This move supports rapid, in-house development and testing, while leveraging Solid Power’s sulfide-based electrolyte expertise. BMW’s strategic investments and close work with Solid Power show a clear intent: to lead in next-generation EV battery innovation.
Real-World Testing in the BMW i7
The integration of Solid Power’s large-format ASSB cells into a BMW i7 test vehicle marks a significant technological breakthrough. The test car, operating in Munich, uses a hybrid design combining BMW’s fifth-generation prismatic cell architecture with new module concepts tailored for solid-state cells. This setup allows BMW engineers to evaluate key factors like cell expansion, operating pressure, and thermal conditions. The results will inform future production-ready systems. This rigorous real-world testing offers critical insights into performance, safety, and scalability for electric vehicle applications.
Toward a More Electric, Efficient Future
By testing solid-state batteries in a real EV, BMW is validating their long-term viability in commercial vehicles. These batteries could allow for longer driving ranges, reduced weight, and enhanced safety—cornerstones of next-gen electric mobility. BMW’s extensive network of over 300 research partners, combined with years of expertise consolidated at the Battery Cell Competence Center, reinforces its leadership in the battery space. The partnership with Solid Power embodies BMW’s commitment to a technology-open, forward-looking approach that places it at the forefront of EV development. With continued testing and refinement, solid-state batteries could soon redefine what’s possible for electric vehicles.
