ProLogium starts mass production of solid-state batteries at 381 Wh/kg
What's the deal? Taiwan-based ProLogium has begun mass production of its Gen 3.5 all-solid-state Lithium Ceramic Battery cells. The move follows a 2022 investment from Mercedes-BenzDealroom has a profile for this one. Try Dealroom → to develop next-generation solid-state batteries together.
The numbers: Third-party testing from TÜV RheinlandDealroom has a profile for this one. Try Dealroom → verified that ProLogium's 185.4 Ah large-format cell delivers a gravimetric energy density of 381 Wh/kg and a volumetric energy density of 903 Wh/L. That footprint cuts the pack volume and weight electric vehicles require while supporting high-power output and rapid charging.
The certification: Independent testing by UL SolutionsDealroom has a profile for this one. Try Dealroom → under China's GB/T 43568-2026 standard recorded a weight loss of under 0.05% after six hours under vacuum at 120°C — well below the 0.5% limit — officially qualifying the cell as all-solid-state. The test method has been submitted to the International Electrotechnical Commission for international standardisation.
What's the endgame? The Gen 3.5 cell relies on ProLogium's Logithium architecture, first developed in 2012, which pairs a ceramic separator with a patented edge-frame perimeter that seals electrodes and prevents burrs from puncturing separators. By standardising this cell format, the company has scaled manufacturing across three iterations — from sheet-by-sheet lines to roll-to-roll production and, finally, the Taoke Gigafactory for large-format automotive cells — without discarding machinery.
The track record: ProLogium has shipped more than 2.4 million LCB cells globally and holds IATF 16949 automotive certification. It has delivered over 900,000 cells across 175 repeat orders for vehicle audio systems used by a top-three Japanese automaker in North America, plus supply contracts in unmanned aerial systems.
Why now? The unified platform lets ProLogium evolve its chemistry without overhauling factory tooling. Its next Gen 4 LCB will add a fully inorganic superfluidised electrolyte and an Active Safety Mechanism to prevent thermal runaway at high temperatures.
The signal: Only about 10% of existing gigafactory machinery will need modification to shift from Gen 3.5 to Gen 4 — a continuity that could broaden solid-state applications across AI data centres, electric passenger vehicles, maritime vessels, and aerospace, as the industry races to commercialise a technology long seen as the next step for EV batteries.
Read more: dsf.my
Image credit: Kevin Krejci
