Mercedes-Benz is expanding its partnership with the Taiwanese company ProLogium to advance solid-state battery technology for automotive use. Under the agreement, the automaker will prioritize testing ProLogium’s fourth-generation lithium-ceramic battery cells. These cells utilize ceramic separators and non-flammable inorganic electrolytes to support high power output and rapid charging.
Testing will take place at Mercedes-Benz facilities and third-party institutions to evaluate the electrical, thermal, and safety performance of the cells. ProLogium is also developing a manufacturing plant in Dunkirk, France, with a projected maximum capacity of 44 GWh. This facility is intended to supply battery cells to European clients, including Mercedes-Benz.
Mercedes-Benz is also collaborating with the US-based Factorial Energy to test lithium-metal battery cells. Last year, a Mercedes-Benz EQS equipped with a Factorial Energy battery pack achieved a range of 1205 kilometers on a single charge, with an estimated 137 kilometers of range remaining at the end of the test.
The automotive industry is actively pursuing solid-state battery technology to improve energy density, safety, and charging speeds. Companies such as BYD, Chery, Toyota, Nissan, Honda, Volkswagen, and Stellantis are currently testing these batteries for future electric vehicle models, with some products expected to reach the market within the next 12 months.
