BMW has recently begun testing an i7 electric vehicle equipped with a large-format solid-state battery pack. This move signifies a major step forward in the automotive industry, as solid-state batteries offer numerous advantages such as improved energy density, increased range, faster charging capabilities, and enhanced safety features. While many automakers are conducting research on solid-state technology, very few have actual working prototypes with large-format batteries, making BMW’s i7 a rare and innovative development.
The BMW i7, currently undergoing testing in Munich, is the first BMW vehicle to feature solid-state batteries on public roads. It is important to note that these batteries are of the all-solid-state variety, rather than semi-solid-state, showcasing BMW’s commitment to exploring cutting-edge technologies. Martin Schuster, BMW’s Vice President of Battery Cell and Cell Module, has previously stated that solid-state batteries may not be necessary in the brand’s production EVs until the mid-2030s. However, the testing of the i7 with solid-state batteries serves as a valuable real-world experiment to assess the technology’s performance and potential benefits.
The solid-state i7 utilizes prismatic cells similar to BMW’s Gen5 batteries, which are currently used in their electric vehicles. These cells feature a solid sulfide-based electrolyte instead of a liquid electrolyte, highlighting the advancements in battery technology. Schuster emphasized BMW’s dedication to developing new battery cell technologies and collaborating with partners like Solid Power to expand their knowledge and expertise in this field.
Although the i7 test vehicle incorporates cell casings from BMW’s existing production EV batteries, indicating its experimental nature, BMW is gearing up to launch its Gen6 batteries with the Neue Klasse EVs. These next-generation batteries will feature cylindrical cells, hinting at further advancements before transitioning to solid-state technology. With promises of faster charging, increased range, reduced carbon emissions, and lower production costs per pack, BMW aims to push the boundaries of battery technology with each new iteration.
Despite the progress made with Gen6 batteries, BMW continues to explore solid-state technology in collaboration with Solid Power. While the potential benefits of solid-state batteries are substantial, the current high costs and production challenges pose significant hurdles. Unless there is a breakthrough that significantly reduces manufacturing costs and streamlines production processes, BMW may not prioritize the rapid adoption of solid-state batteries for its EV lineup.
In conclusion, BMW’s testing of the i7 with solid-state batteries represents a significant milestone in the automotive industry’s pursuit of advanced battery technologies. As the company continues to innovate and collaborate with partners, such as Solid Power, the future of electric mobility looks increasingly promising. While solid-state batteries hold great potential, BMW’s strategic approach to battery development and its focus on incremental advancements suggest a methodical and calculated path towards integrating the latest technologies into its electric vehicles.