# ProLogium solid-state battery production > Live situation record from CLSTR: https://clstr.news/situations/prologium-solid-state-battery-production > Updated: 2026-09-09T02:08:34.000Z. Sources: 11. Developments: 2. Taiwanese company ProLogium Technology has commenced mass production of its Generation 3.5 Lithium Ceramic Battery (LCB) at its facility in Taoyuan. The large-format 185.4 Ah cells are designed for high-power and fast-charging applications in electric vehicles. Third-party testing has verified the battery’s performance metrics. TÜV Rheinland confirmed a gravimetric energy density of 381 Wh/kg and a volumetric energy density of 903 Wh/L. Additionally, UL Solutions verified the cell against Chinese standards, noting a mass loss of less than 0.05% after six hours at 120 °C under vacuum, which meets the requirements for solid-state classification. The Gen 3.5 battery utilizes the proprietary Logithium architecture, which combines a ceramic separator with a specialized peripheral frame structure. While the Taoyuan plant currently operates at a pilot-scale annual capacity of 0.5 GWh, the company is also developing a Gen 4 battery that will utilize a fully inorganic superfluidized electrolyte. ## Timeline ### 2026-09-09: ProLogium begins mass production of solid-state batteries in Taiwan Taiwan-based ProLogium has begun mass production of its Gen 3.5 lithium ceramic solid-state batteries, achieving high energy density and meeting all-solid-state certification standards. 6 sources. https://clstr.news/cluster/prologium-begins-mass-production-of-solid-state-batteries-in-taiwan ### 2026-09-06: ProLogium begins mass production of high-density solid-state batteries ProLogium Technology has begun mass production of its Gen 3.5 lithium ceramic solid-state battery in Taiwan, achieving high energy densities of 381 Wh/kg in third-party tests. 5 sources. https://clstr.news/cluster/prologium-begins-mass-production-of-high-density-solid-state-batteries --- Cite as: ProLogium solid-state battery production. CLSTR, https://clstr.news/situations/prologium-solid-state-battery-production