Mercedes-Benz AG and ProLogium Holding Inc. announced on September 24, 2026, that they have signed a joint testing agreement covering ProLogium’s Gen4 Superfluidized Inorganic Next-Generation Lithium Ceramic Battery cells. The agreement gives Mercedes-Benz priority access to the cells for a preliminary technology evaluation focused on possible future vehicle applications.
The cells will undergo electrical, thermal and safety testing at Mercedes-Benz facilities and specialized external testing institutes. Mercedes-Benz will use the results to assess whether the technology is suitable for integration into future vehicles. The companies did not disclose a testing schedule or identify potential vehicle programs.
According to ProLogium, the Gen4 platform is intended to combine intrinsic safety, high performance, high energy density, scalable manufacturing and a competitive cost structure. Its safety design incorporates a non-flammable inorganic electrolyte, ceramic separator technology and the company’s proprietary active safety mechanism. ProLogium also said the platform supports fast charging, high power output and good low-temperature performance.
The testing agreement builds on a partnership between the companies that began in 2016. Their work has progressed from early hybrid solid-state Gen3 cell development and validation to potential future vehicle platform planning. Mercedes-Benz is also a strategic investor in ProLogium and has a director on the battery company’s board. The collaboration has covered pouch cells, next-generation prismatic cells and ProLogium’s bipolar technology.
ProLogium said its Taoke Gigafactory in Taiwan has completed GWh-scale manufacturing validation and supports C-sample production, demonstration vehicle programs and future commercial production. The company is also developing a gigafactory in Dunkirk, France. The facility’s first phase is designed for annual production capacity of 4.0 GWh, expected to be progressively achieved by 2030, while the site has a maximum designed capacity of up to 44.0 GWh.
Source: ProLogium Technology Co., Ltd
