BMW, Samsung SDI, and Solid Power are jointly developing solid-state batteries.

Battery Technology BMW Expands Solid-State Battery Alliance with Samsung SDI

2025-11-06 From Sven Prawitz | Translated by AI 2 min Reading Time

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BMW, Samsung SDI, and Solid Power aim to bring solid-state batteries to market maturity together. The Korean supplier is set to industrialize the technology — and aims to become the market leader.

BMW has completed initial vehicle tests with solid-state batteries. Samsung SDI is now set to industrialize the cells.(Image: Tom Kirkpatrick/BMW AG) — BMW has completed initial vehicle tests with solid-state batteries. Samsung SDI is now set to industrialize the cells.
(Image: Tom Kirkpatrick/BMW AG)

The BMW Group is advancing its development of solid-state batteries with Samsung SDI as a new partner. The Korean battery cell manufacturer thus expands the expertise in the project for the so-called All-Solid-State Battery (ASSB), reported The Korea Herald. A few days later, the German automaker confirmed the extended cooperation, which builds on the partnership between BMW and Solid Power established in 2022.

Solid Power is now set to supply sulfide-based solid electrolytes to Samsung SDI. The Korean corporation will integrate these as separators and catholytes for cell production. The produced cells will be evaluated based on performance parameters agreed upon between Samsung SDI and BMW. The goal is the development of ASSB cells for the next generation of evaluation vehicles. The successful integration of large-format ASSB cells from Solid Power into a BMW i7 test vehicle has already been achieved, according to the companies.

Samsung SDI Aims to Become the Market Leader

Martin Schuster, Vice President of Battery Cell and Cell Module at the BMW Group, sees "significant momentum in our journey towards developing new battery cell technologies" in the expanded partnership. Stella Joo-Young Go, Executive Vice President of ASSB Product Development at Samsung SDI, adds that Samsung SDI aims to "take the lead in the commercialization of ASSB."

According to the partners, solid-state battery technology promises higher energy density while maintaining high safety compared to current methods. By replacing liquid electrolytes with solid materials, greater vehicle ranges are expected to be achieved without weight disadvantages in the overall storage system.

Solid-State Batteries at BMW

BMW and Solid Power have been cooperating since 2016 under an extended Joint Development Agreement. The Munich-based company supported the joint development with an investment in Solid Power in May 2021. At the end of October 2023, BMW received the first prototype sample cells from Solid Power for qualification. In early 2023, BMW announced the establishment of a prototype line for solid-state cells in Parsdorf. In May 2025, the partners were already testing pure solid-state cells in a BMW i7 prototype on the road.

At the end of 2022, the companies agreed to deepen their partnership. BMW operates a prototype line for solid-state cells at the Competence Centre for Manufacturing and Cells in Parsdorf based on a research and development license from Solid Power.

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Date: 08.12.2025

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