ProLogium Begins Mass Production of Gen 3.5 Solid-State

ProLogium Technology has commenced mass production of its Gen 3.5 Lithium Ceramic Battery (LCB) at its plant in Taiwan. The large-format 185.4 Ah cell delivers a specific energy of 381 Wh/kg and an energy density of 903 Wh/L, according to a recent TÜV test.

Independent testing by UL Solutions, using China's GB/T 43568-2026 methodology, assessed the cell's thermal stability. After six hours under vacuum at 120° C, the cell recorded a weight loss of less than 0.05%. This figure is significantly below the 0.5% maximum threshold required for all-solid-state classification under that standard.

Cell Architecture and Production History

The cell is built on ProLogium's proprietary Logithium architecture. This design pairs a ceramic separator with an edge-frame structure. The frame adds a second separator around the electrode perimeter to help isolate potential burrs while providing sealing and insulation. ProLogium completed the design and patent work for this architecture in 2012.

The company's commercial production journey began in 2013 with a sheet-by-sheet line targeting niche markets like consumer electronics and medical devices. A roll-to-roll line followed in 2017. The current third-generation Giga-level manufacturing platform entered operation in 2024. ProLogium says it obtained IATF 16949 automotive quality-management certification for its production line in 2022 and has passed subsequent annual audits.

Current and Future Applications

ProLogium's cells are already in use. They are supplied to a US automotive audio-system company and installed in vehicles from a Japanese automaker. The company estimates it has delivered more than 900,000 cells across over 175 repeat orders to the audio company. Orders have also come from the unmanned systems market, where payload, endurance, and recharge time are critical factors.

The next generation, Gen 4 LCB, was outlined in 2025. It uses a fully inorganic superfluidized electrolyte system while retaining the same Logithium architecture and manufacturing process. ProLogium estimates that about 10% of the existing Giga-level line would need modification to produce the new cells.

Gen 4 introduces an Active Safety Mechanism (ASM) designed to prevent thermal runaway by stabilizing electrode active materials at high temperature. The company expects this generation to improve low-temperature performance and reduce material and manufacturing costs. Its intended applications are electric vehicles, maritime, and aerospace.

Global Manufacturing Strategy

ProLogium plans to build a global manufacturing network across three regions. Taiwan will serve as the technology-development and manufacturing-validation base. France is designated for scaled production, and North America is targeted for localized supply and manufacturing capacity.

For the first phase in North America, the company will evaluate partnerships. Under this model, Inlays-the single-layer units that form an LCB cell-would be produced at scale in France and shipped overseas. Partners in North America would then stack them into pouch cells and handle module and pack integration closer to end customers. ProLogium would consider adding Inlay production capacity in the United States at a later stage.