Ioncor, the battery business spun off from Valmet Automotive in 2024 and now partially nationalised, has introduced its new Energy Pack Long battery system for electric buses. The cell-to-pack solution, which eliminates the need for traditional modules, delivers 79 kWh per pack and can be combined into larger systems with total capacities reaching 1,000 kWh.
Operating at 666 volts, the Energy Pack Long boasts an energy density of 290 Wh/l or 160 Wh/kg — a figure described by Ioncor CEO Roberts Abele as “industry-leading.” The battery packs measure 194.6 x 55.8 x 24.9 cm and are designed to perform in temperatures from -30 to +60°C. With a charging rate of 3C, the system can charge from 10% to 80% in around 25 minutes and offers a lifespan exceeding 7,000 cycles. Ioncor says the batteries can be flexibly positioned within vehicle designs and are available with multiple chemical configurations to suit customer needs.
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The Energy Pack Long joins Ioncor’s existing 50 kWh Energy Pack model and reflects the company’s deepening role in Finland’s battery ecosystem. Following the Finnish government’s decision to nationalise key parts of its battery and automotive supply chain, the Finnish Minerals Group (FMG) will soon own 70% of Ioncor, with Varma holding 16% and Pontos 14%. The government has also pledged a €20 million capital investment to support Ioncor’s growth.
“FMG’s strategic objective is to develop a responsible battery value chain in Finland and to drive the creation of a new industry and expertise in the country,” said FMG CEO Matti Hietanen. “Ioncor fits perfectly with our special mission and strategy, as battery engineering and system manufacturing are an essential addition to our portfolio.”
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Ioncor employs around 1,000 people across Finland and Germany, developing and producing battery systems for buses, trucks, and other commercial vehicles. The company’s growth underscores Finland’s bid to strengthen its domestic battery value chain, both to bolster economic resilience and to advance its clean energy ambitions.
