ProLogium and OPmobility to integrate solid-state cells into modules

ProLogium recently began construction of a solid-state battery cell plant in Dunkirk, France, with the cells set to roll off the production line from 2028. The Taiwanese battery specialist is now exploring a collaboration with OPmobility, a supplier based in Levallois-Perret near Paris, to jointly integrate these cells into battery modules and, eventually, into packs. The companies’ stated goal is “to deliver a system-level solution that meets the rapidly growing demand of the global EV market,” according to a statement.

ProLogium specialises in the development and production of lithium-ceramic solid-state battery cells. The company’s current battery generation, named the ‘Superfluidized All Inorganic Solid-State Lithium Ceramic Battery’, is claimed to achieve a volumetric energy density of 900 Wh/l and a gravimetric energy density of 380 Wh/kg. ProLogium states that the charging time from 5 to 80 per cent is ‘approximately 6.4 minutes’. Additionally, the company highlights: “In durability and use-case performance, cycle life exceeds 1,200 cycles, and discharge at -20°C maintains over 95 per cent performance.”

The collaboration with OPmobility aims to explore ways to integrate ProLogium’s cells into ready-to-install battery products. In an initial phase, ProLogium will supply solid-state battery cells to OPmobility for electrical performance testing, “under aligned test protocols and engineering workflows”. OPmobility will subsequently handle the design, development, and manufacturing of the battery modules using the cells provided by ProLogium. The shared objective is to develop a battery module solution that can be adopted by OEMs for future EV platforms,” the partners emphasised.

ProLogium stresses the importance of aligning test protocols and technical workflows to achieve faster technical convergence and better assessment of system integration. This helps “both parties identify key parameters and challenges earlier and improve future OEM engagement efficiency”. However, both parties are still yet to confirm their intentions. In their forthcoming discussions, they hope to investigate and validate how advantages at the cell level can be technically implemented and verified at the module and pack levels.

Vincent Yang, Founder and CEO of ProLogium, commented: “For solid-state batteries to be truly adopted by the market, the key is system integration and validation – from cells to modules and packs. This MoU with OPmobility starts from pragmatic performance testing and module development under aligned test protocols and engineering workflows, clarifying the critical path for vehicle integration. Our shared goal is an OEM-adoptable module solution, and we will continue to advance discussions within a compliant framework.”

Youssef Souiba, Executive Vice President at OPmobility, added: “Working with an established leader in the field of solid-state batteries such as ProLogium strengthens OPmobility’s ability to anticipate the needs of global automotive manufacturers and supports the Group’s ambition to expand its technology portfolio and its customer reach.”

For context: ProLogium officially began construction of its factory in Dunkirk in February, following an announcement in 2023. The first phase, aimed at producing fourth-generation lithium-ceramic solid-state batteries with an initial annual capacity of 0.8 GWh, is scheduled for completion in 2028. Drawing on experience from an existing 3 GWh factory in Taoyuan, Taiwan, the ramp-up of production in Dunkirk is expected to proceed relatively quickly. From 2029, capacity is set to increase, with Phase 2 reaching full utilisation at 4 GWh per year by 2030. By 2032, the ‘Fab 1’ facility is planned to achieve its full capacity of 12 GWh.

While investor VinFast is the primary customer for the lithium-ceramic solid-state batteries produced at ProLogium’s Taoyuan plant, no anchor customer has yet been publicly announced for the Dunkirk project. However, ProLogium is one of the few companies in the industry to have demonstrated the ability to manufacture such lithium-ceramic solid-state batteries: since 2024, over 750,000 cells have been produced at the Taoyuan facility, according to the company.

prologium.com, opmobility.com