Taiwanese solid-state battery developer ProLogium and French automotive supplier OPmobility have signed a letter of intent to explore the integration of solid-state battery cells into battery modules and packs for future electric vehicles.
The collaboration aims to combine ProLogium’s lithium-ceramic solid-state battery technology with OPmobility’s expertise in battery system design and manufacturing, with the goal of creating production-ready solutions for global automotive manufacturers.
According to the companies, the partnership is intended to support the development of system-level battery products capable of meeting the evolving requirements of next-generation electric vehicle platforms.
Initial Focus on Module Development
Under the proposed collaboration, ProLogium will provide solid-state battery cells to OPmobility for electrical performance testing using jointly defined testing procedures and engineering processes.
Following the evaluation phase, OPmobility will be responsible for designing, developing and manufacturing battery modules incorporating ProLogium’s cells.
The partners said their shared objective is to create a battery module solution that can be adopted by vehicle manufacturers for future electric vehicle programmes.
The companies added that aligning testing methodologies and engineering workflows at an early stage is expected to accelerate technical validation and improve assessment of system-level integration.
Advancing Solid-State Battery Commercialisation
ProLogium specialises in lithium-ceramic solid-state batteries and is among a limited number of companies that have demonstrated large-scale production capabilities for the technology.
The company’s latest battery generation, known as the Superfluidized All Inorganic Solid-State Lithium Ceramic Battery, is claimed to deliver a volumetric energy density of 900 Wh/l and a gravimetric energy density of 380 Wh/kg.
According to ProLogium, the technology can charge from 5% to 80% in approximately 6.4 minutes, achieve more than 1,200 charge-discharge cycles, and retain more than 95% performance at temperatures as low as -20°C.
The collaboration with OPmobility is intended to determine how these cell-level advantages can be successfully translated into complete battery modules and pack architectures suitable for commercial vehicle applications.
Industry Partners Highlight System Integration
“For solid-state batteries to be truly adopted by the market, the key is system integration and validation – from cells to modules and packs,” said Vincent Yang, Founder and CEO of ProLogium.
“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.”
Yang added that the ultimate objective is to develop a battery module solution capable of meeting automotive industry requirements.
Youssef Souiba, Executive Vice President at OPmobility, said the agreement strengthens the company’s position in advanced battery technologies.
“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.”
Dunkirk Factory Targets Production from 2028
The agreement comes as ProLogium advances construction of its first European manufacturing facility in Dunkirk, France.
Construction officially began in February 2026 following the project’s initial announcement in 2023.
The first phase of the plant is scheduled to begin production in 2028 with an annual capacity of 0.8 GWh dedicated to fourth-generation lithium-ceramic solid-state batteries.
The company plans to expand production progressively, targeting 4 GWh of annual capacity by 2030 and reaching the facility’s full planned capacity of 12 GWh by 2032.
Building on Existing Manufacturing Experience
ProLogium’s expansion strategy is supported by operational experience gained at its existing manufacturing facility in Taoyuan, Taiwan.
The company said it has produced more than 750,000 lithium-ceramic solid-state battery cells at the site since 2024, demonstrating its ability to manufacture the technology at scale.
While Vietnamese automaker VinFast currently serves as the primary customer for batteries produced in Taiwan, ProLogium has yet to announce a major anchor customer for its upcoming Dunkirk facility.
The collaboration with OPmobility represents another step toward commercialising solid-state battery technology and establishing a broader ecosystem capable of supporting future electric vehicle production in Europe and beyond.
