The BMW Group is advancing its exploration of all-solid-state battery (ASSB) technology by integrating large-format ASSB cells from Solid Power into its test vehicle, the BMW i7, currently operating in the Munich area.
This initiative aims to leverage the potential benefits of ASSB technology, which offers higher energy density in a compact storage system compared to existing battery technologies.
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Since 2022, the BMW and Solid Power have intensified their collaboration under a technology transfer agreement to develop ASSB technology.
The ASSB technology is expected to enable longer vehicle ranges without the added weight typically associated with current battery systems.
The concept battery in the BMW i7 test vehicle combines Gen5 construction principles, featuring prismatic cells in modules, with innovative module concepts designed for integrating ASSB cells from Solid Power.
This integration will allow for the investigation of critical factors such as cell expansion management, operating pressure control, and temperature condition adjustments.
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By GlobalDataSolid Power president and CEO John Van Scoter said: “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 ASSB’s and continue to drive innovation of our sulphide electrolyte in support of that future for EV’s.”
BMW believes that the use of Solid Power’s cells, which utilise sulphide-based electrolytes, will provide valuable insights during the test programme over the coming months.
BMW Battery Cell and Cell Module vice president Martin Schuster said: “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.”
These cells have been developed and manufactured by Solid Power in collaboration with experts from the BMW. The partnership between the companies dates back to 2016, supported by an extended joint development agreement.
At the end of 2022, both companies agreed to deepen their partnership, with BMW operating a solid cell prototype line at the Cell Manufacturing Competence Centre (CMCC) in Parsdorf.
Since 2008, BMW has been enhancing its expertise in battery cell technology, consolidating this knowledge at the Battery Cell Competence Centre (BCCC) in Munich since 2019.
