The BMW Group has integrated large-format, pure all-solid-state battery (ASSB) cells from Solid Power into its BMW i7 test vehicle, currently operating in the Munich area. ASSB technology promises significantly higher energy density in a compact storage system compared to conventional batteries, potentially enabling longer driving ranges without adding extra weight.
Since 2022, BMW and Solid Power, Inc. (Nasdaq: SLDP) have accelerated their collaboration under a technology transfer agreement focused on developing cutting-edge ASSB solutions.
Both companies recognize the transformative potential of true ASSB technology. Offering superior energy density, ASSB batteries can extend vehicle range while avoiding the weight penalties associated with traditional battery packs.
John Van Scoter, President and CEO of Solid Power, emphasized the milestone: “Our partnership with BMW has enabled the first demonstration of truly all-solid-state battery cells in a vehicle. We are committed to advancing our sulfide electrolyte innovation to realize the future of electric vehicles.”
Martin Schuster, BMW Group’s Vice President of Battery Cell and Cell Module, highlighted BMW’s open technology approach: “Our BMW i7 ASSB test vehicle exemplifies our commitment to pushing new battery technologies forward. Collaborations with partners like Solid Power continuously expand our expertise and accelerate development.”
The BMW i7’s concept battery merges established Gen5 prismatic cell design with innovative module concepts for incorporating Solid Power’s ASSB cells. The test program focuses on critical aspects such as cell expansion management, operating pressure control, and temperature regulation.
Utilizing sulfide-based electrolyte cells and their full battery pack integration will yield vital insights for BMW over the coming months. These innovative cells, jointly developed and produced by Solid Power and BMW experts, mark a significant step forward—though further refinement is required before ASSB technology becomes commercially competitive.
BMW and Solid Power’s collaboration dates back to 2016 under a Joint Development Agreement, strengthened by BMW’s investment in Solid Power during a 2021 financing round. In late 2022, both firms deepened their partnership, with BMW establishing a solid cell prototype line at the Cell Manufacturing Competence Center (CMCC) in Parsdorf, leveraging Solid Power’s expertise through a research and development license.
BMW’s battery cell expertise has grown steadily since 2008, consolidated in the Battery Cell Competence Center (BCCC) in Munich since 2019. The BCCC encompasses the full value chain, from research and development to cell design and production readiness.
To rapidly and efficiently translate innovations into practical solutions, BMW collaborates with an extensive network of around 300 partners, including established corporations, startups, and academic institutions.
The Solid Power partnership exemplifies BMW’s strategic battery technology roadmap, reinforcing its position alongside leading industry innovators. This robust approach ensures BMW maintains access to the latest global advances in battery cell research and development.
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