Mercedes‑Benz & ProLogium agree joint testing of Gen4 solid‑state battery cells

Deal overview

Mercedes‑Benz AG and ProLogium Holding Inc. signed a joint testing agreement granting Mercedes‑Benz priority access to ProLogium’s latest Gen4 Superfluidized Inorganic Next‑Generation Lithium Ceramic battery cells. The agreement builds on the companies’ nearly ten‑year collaboration to advance next‑generation battery technologies for mobility.

Testing scope

ProLogium’s Gen4 cells will undergo extensive electrical, thermal and safety testing at Mercedes‑Benz’s dedicated facilities and at specialized external testing institutes. Results will be used to assess the technology’s suitability for potential use in future vehicles.

Gen4 technology focus

The Gen4 platform is presented as combining five core advantages: intrinsic safety, high performance, high energy density, scalable manufacturing and competitive cost. 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 improved low‑temperature performance.

Partnership and next steps

Since 2016 the partnership has progressed from early hybrid‑solid‑state GEN3 development and validation toward potential vehicle platform planning. Mercedes‑Benz is a strategic investor, has a director on ProLogium’s board and supports ProLogium’s Dunkirk development plans; ProLogium expects to pursue a NASDAQ listing in 4Q2026.