By ATN Editorial Team
Summary: Mercedes-Benz AG and ProLogium Holding Inc. have signed a joint testing agreement that gives Mercedes-Benz priority access to test the ProLogium Gen4 solid-state battery, the company’s Superfluidized Inorganic Next-Generation Lithium Ceramic Battery cell. The Gen4 cells will undergo extensive electrical, thermal and safety testing at Mercedes-Benz facilities and at specialised external testing institutes.
Key engineering takeaway: ProLogium describes the Gen4 safety architecture as a non-flammable inorganic electrolyte, ceramic separator technology and a proprietary active safety mechanism, and says the platform holds fast charging, high power output and low-temperature performance alongside it. The ProLogium Gen4 solid-state battery platform aims to combine five core advantages: intrinsic safety, high performance, high energy density, scalable manufacturing and competitive cost structure.
Why it matters: The companies say the test results will help assess the technology’s suitability for potential use in future vehicles. ProLogium says the partnership, which began in 2016 and has included Mercedes-Benz investing in ProLogium, has progressed from early cell development and validation to testing its latest Gen4 technology for future vehicle applications. ProLogium’s planned Dunkirk Gigafactory, with a future capacity of up to 44 GWh, is expected to establish localised European manufacturing and supply-chain capacity.
- Mercedes-Benz continues to drive solid-state battery technology, and has secured priority access to ProLogium’s latest Gen4 Superfluidized Inorganic Next-Generation Lithium Ceramic Battery (Gen 4 battery) cells.
- ProLogium’s Gen4 battery technology highlights an innovative next generation battery technology approach with balanced and promising characteristics, such as high energy density, cell safety and high rate capability.
- This testing scheme builds upon the nearly 10-year partnership between the two companies that has included Mercedes-Benz’s investing in ProLogium and joint technical development agreements.
Mercedes-Benz AG and ProLogium Holding Inc. have signed a joint testing agreement, giving Mercedes-Benz priority access to test ProLogium’s latest Gen4 battery cells and further building on the companies’ nearly ten-year partnership in advancing next-generation battery technologies for mobility.
Under the agreement, ProLogium’s Gen4 battery technology will undergo extensive electrical, thermal and safety testing at Mercedes-Benz’s dedicated facilities and specialized external testing institutes. The results will help assess the technology’s suitability for potential use in future vehicles.
What Is The ProLogium Gen4 Solid-State Battery?
The Gen4 battery platform aims to combine five core advantages: intrinsic safety, high performance, high energy density, scalable manufacturing and competitive cost structure. Its safety architecture integrates a non-flammable inorganic electrolyte, ceramic separator technology and ProLogium’s proprietary active safety mechanism, while supporting fast charging, high power output and good low-temperature performance.
Vincent Yang, Founder and CEO of ProLogium, said: “Over nearly a decade, our collaboration with Mercedes-Benz has evolved from early cell development and validation to testing our latest Gen4 technology for future vehicle applications. For next-generation batteries, true value comes from turning years of innovation into scalable manufacturing and commercially viable products. With Mercedes-Benz’s early investment and support for our European expansion, together with the strong support of the French government and the European Union, we are advancing toward large-scale production in Europe and building a manufacturing footprint to serve global markets.”
“At Mercedes-Benz, we are committed to shaping the future of electric mobility through technological leadership and innovation. Our long-standing partnership with ProLogium is a strong example of how we bring the best expertise together to advance next-generation battery technologies. By combining ProLogium’s pioneering solid-state battery approach with Mercedes-Benz’s deep battery development, testing and integration capabilities, we are taking the next step in exploring advanced battery technologies for future electric vehicles.” Jörg Burzer, Member of the Board of Management, Mercedes-Benz Group AG, Chief Technology Officer, Development & Procurement.
Nearly A Decade Of Mercedes-Benz And ProLogium Joint Development
Since 2016, the partnership between the two companies has progressed from early hybrid-solid-state GEN 3 which has more than 10 years of commercial references across industries and joint development to potential future vehicle platform planning. Mercedes-Benz became one of ProLogium’s long-term global automotive partners and strategic investors, expanding the relationship beyond product validation. The collaboration has validated multiple lithium ceramic battery formats, including pouch and the first next generation prismatic cells, as well as ProLogium’s Bi-Polar technology.
Mercedes-Benz has a Director on the Board of Directors of ProLogium and is fully supportive of ProLogium’s development plans for its Dunkirk plant as well as ProLogium’s further plans to become publicly listed on the NASDAQ in 4Q2026.
Taoke And Dunkirk Manufacturing Capacity
ProLogium’s Taoke Gigafactory in Taiwan has completed GWh-scale manufacturing validation and supports C-sample production, Demo Car programs and future commercial production.
ProLogium’s planned Dunkirk Gigafactory, with a future capacity of up to 44 GWh, is expected to establish localized European manufacturing and supply-chain capacity, replicating the proven production model developed in Taiwan. Once the first phase of this factory is completed, ProLogium will be able to provide commercial cells to European customers at a scale large enough to support electric vehicle platforms on the continent.
ProLogium Gen4 Solid-State Battery: Frequently Asked Questions
What is the ProLogium Gen4 solid-state battery?
The ProLogium Gen4 solid-state battery is the company’s Superfluidized Inorganic Next-Generation Lithium Ceramic Battery cell. ProLogium describes it as a platform targeting five attributes at once: intrinsic safety, high performance, high energy density, scalable manufacturing and competitive cost structure. Its safety architecture combines a non-flammable inorganic electrolyte, ceramic separator technology and a proprietary active safety mechanism, while supporting fast charging, high power output and good low-temperature performance.
How has the Mercedes-Benz and ProLogium partnership developed?
The partnership began in 2016 and has progressed from early hybrid-solid-state GEN 3 work and joint development to potential future vehicle platform planning. Mercedes-Benz is a strategic investor with a Director on ProLogium’s Board of Directors, and the collaboration has validated multiple lithium ceramic battery formats, including pouch and the first next generation prismatic cells, as well as ProLogium’s Bi-Polar technology.
What testing will Mercedes-Benz run on the Gen4 cells?
Under the joint testing agreement, the Gen4 cells undergo extensive electrical, thermal and safety testing at Mercedes-Benz’s dedicated facilities and at specialised external testing institutes. The stated purpose is to assess the technology’s suitability for potential use in future vehicles. The agreement gives Mercedes-Benz priority access to test ProLogium’s latest Gen4 battery cells.
What is a superfluidized inorganic solid-state electrolyte?
An inorganic solid-state electrolyte is a solid, ion-conducting material, such as a ceramic, that takes the place of the liquid organic electrolyte in a conventional lithium-ion cell; superfluidized forms part of ProLogium’s name for its Gen4 cell. ProLogium says the Gen4 safety architecture integrates a non-flammable inorganic electrolyte, ceramic separator technology and its proprietary active safety mechanism.
What manufacturing capacity is ProLogium planning in Europe?
ProLogium’s planned Dunkirk Gigafactory, with a future capacity of up to 44 GWh, is expected to establish localised European manufacturing and supply-chain capacity, replicating the production model developed in Taiwan. ProLogium says that once the first phase of the factory is completed, it will be able to provide commercial cells to European customers at a scale large enough to support electric vehicle platforms on the continent.
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