The BMW Group has integrated large-format, all-solid-state battery (ASSB) cells from Solid Power into its BMW i7 test vehicle, which is currently operating in the Munich area. ASSB technology offers potential advantages, including higher energy density within a more compact storage system compared to existing battery technologies.
Since 2022, BMW Group and Solid Power, Inc. have intensified their collaboration to develop ASSB technology under a technology transfer agreement. Both companies are optimistic about the potential of genuine ASSB technology. ASSB batteries are expected to provide higher energy density, enabling longer vehicle ranges without increasing the overall weight of the storage system.
John Van Scoter, President and CEO of Solid Power, stated, “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. We believe in the promise of ASSBs and continue to drive innovation of our sulfide electrolyte in support of that future for electric vehicles.”
Martin Schuster, Vice President Battery Cell and Cell Module at BMW Group, added, “Our BMW i7 ASSB test vehicle on the road is a perfect example of the BMW Group’s technology-open mindset. 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.”
The battery integrated into the BMW i7 combines proven Gen5 construction principles, which use prismatic cells in modules, with innovative module concepts for integrating Solid Power’s ASSB cells. The test program will explore cell expansion management, operating pressure control, and temperature condition adjustments.
Solid Power’s cells feature sulfide-based electrolytes and are fully integrated into the BMW i7’s battery pack. This collaboration is expected to yield significant insights over the coming months. The cells were developed and manufactured by Solid Power in partnership with BMW Group experts.
Further development is necessary to implement ASSB technology into a competitive overall storage system. BMW Group and Solid Power have been working together since 2016 under a Joint Development Agreement, with BMW Group investing in Solid Power in May 2021 during a financing round. In late 2022, the partnership was deepened, with BMW operating a solid-cell prototype line at the Cell Manufacturing Competence Center (CMCC) in Parsdorf under a research and development license.
Since 2008, BMW Group has been expanding its expertise in battery cell technology, centralizing this knowledge at the Battery Cell Competence Center (BCCC) in Munich since 2019. The BCCC covers the entire value chain, from research and development to battery cell design and production.
To accelerate battery cell technology innovations, BMW Group collaborates with approximately 300 partners, including established companies, startups, and universities. The partnership with Solid Power highlights BMW Group’s strategy to develop innovative battery technologies in collaboration with leading industry partners, ensuring access to cutting-edge battery cell research globally.
Source: BMW Group Press Release
