IONCOR, spun out of Valmet Automotive in 2024 with over 50 years of heritage, develops modular and cell-to-pack battery systems for buses, trucks and off‑highway machinery, offering engineering, testing, production and lifecycle services.
IONCOR’s core technology centers on modular, stackable battery platforms and cell-to-pack architectures that increase volumetric and gravimetric energy density while simplifying integration. The Energy Pack Long delivers ~290 Wh/l and ~160 Wh/kg, supports scalable capacities (≈79–1,000 kWh), and fast charging up to ~3C (10–80% in ~25 minutes). Systems include industrial BMS, extensive safety validation, high ingress protection and wide operating temperatures (-30°C to +60°C). Designs support multiple cell chemistries and emphasize traceability, recyclability and long cycle life (≥7,000 full cycles) for reduced total cost of ownership.
IONCOR offers modular Power Pack and Energy Pack platforms, including the Energy Pack Long, plus bespoke battery systems and contract manufacturing. Products are stackable, scalable and designed for high energy density, fast charging and rugged durability. Primary applications include electric buses, trucks, construction and agricultural machinery, mining and material handling equipment.
Recent activities in 2025 include the October 2025 launch of the Energy Pack Long to support zero-emission bus fleets and heavy-duty electrification. IONCOR consolidated German operations and relocated its battery test hub to Kirchardt to centralize validation and engineering. Ownership restructuring and new capital injections were completed to support scaling of production and product development.
Following a 2025 transaction, ownership is held by Finnish Minerals Group (FMG) with 70%, Varma Mutual Pension Insurance Company with 16%, and Pontos Group with 14%. The Finnish State provided approximately EUR 20 million in new capital while FMG extended a EUR 35 million loan to support operations, product development and factory scale-up.
