ProLogium and OPmobility sign MoU on solid-state battery modules
ProLogium and OPmobility have signed a memorandum of understanding (MoU) to explore joint development of solid-state battery modules for electric vehicles (EVs). Under the agreement, the Taiwan-headquartered battery maker will supply its lithium ceramic cells to OPmobility's C Power business group for performance testing, with OPmobility taking responsibility for module design, development and manufacturing. The shared aim is a system-level battery pack solution that automotive OEMs can evaluate for future EV platforms.
The MoU is a framework for cooperation rather than a binding commercial contract: no financial terms, supply volumes, or named OEM customers have been disclosed. The release confirms the two parties will align on common test protocols and engineering workflows, with the stated goal of shortening the path from cell-level performance data to an OEM-ready module.
The technology case
ProLogium's "Superfluidized All Inorganic Solid-state Lithium Ceramic Battery" — the company's second-generation architecture, introduced in 2025 — is reported to achieve a volumetric energy density of 900 Wh/L and a gravimetric energy density of 380 Wh/kg, with fast-charging from 5% to 80% in approximately 6.4 minutes. The company also cites cycle life of more than 1,200 cycles and retention of over 95% discharge performance at –20°C. These figures are as reported by ProLogium and have not been independently verified.
The developer describes itself as the only company with a publicly demonstrable solid-state battery mass-production line and has shipped more than 800,000 cells from its GWh-class gigafactory in Taoyuan, Taiwan, opened in 2024. A first overseas gigafactory in Dunkirk, France, has cleared environmental and planning approvals; construction is expected to begin in 2026, with ramp-up targeted between Q4 2028 and Q1 2029 and formal mass production in Q2 2029.
Vincent Yang, founder and chief executive of ProLogium, said the MoU "starts from pragmatic performance testing and module development under aligned test protocols and engineering workflows, clarifying the critical path for vehicle integration."
Market context
Solid-state batteries (SSBs) sit at the frontier of EV battery development, promising higher energy density, reduced fire risk and better cold-weather performance compared with conventional lithium-ion chemistries — but the gap between cell-level demonstration and cost-competitive, high-volume module production remains the critical challenge. Established players including Toyota, Samsung SDI, QuantumScape and Solid Power have each announced varying timelines for commercial readiness, while several European and Asian OEMs are hedging across multiple chemistries.
OPmobility, formerly known as Plastic Omnium, has been repositioning its portfolio from exterior automotive parts toward electrification and energy systems through its C Power business unit. The partnership broadens its access to next-generation cell technology without committing capital to cell manufacturing, an approach increasingly common among Tier 1 suppliers seeking to remain relevant as powertrain architectures shift.
The broader market context is one of shifting capital flows. EV demand growth decelerated in some Western markets through 2024–2025, increasing investor scrutiny of pre-revenue SSB developers. At the same time, EU battery regulation — including the Battery Regulation 2023/1542 and carbon-footprint disclosure requirements — is raising the bar for supply-chain transparency, which could favour producers with traceable, European-located manufacturing such as ProLogium's planned Dunkirk facility.
The MoU's next visible milestone will be the outcome of the initial performance-testing phase, which would need to demonstrate module-level parity with the cell metrics before either party would be expected to move toward a joint development agreement or commercial supply arrangement.