Scotland-based firm Dukosi has topped up its Series A round with an additional £2m.
Investors included Scottish Investment Bank, IP Group Plc and venture capital firm Par Equity.
Dukosi, a firm that specialises in battery management systems, uses wireless technology to increase the efficiency of batteries used in electric vehicles.
Clive Scrivener, the chairman, commented on the news: “Our technology resonates with stakeholders throughout the battery supply chain and with the users of battery packs, who all recognise that innovation has a key role to play in meeting the growing demands of managing complex battery systems.
“With this funding, we’re taking the next step to make our vision a reality and bring a new level of intelligence to batteries,” he added.
Scottish Investment Bank head Kerry Sharp praised Dukosi for its use of technology.
She said: “Dukosi is a great example of a globally ambitious and innovative company developing new technology to support the expanding clean energy sector with applications in electric vehicles and energy storage.”
The news comes after the firm received £1m in late 2014, followed by a £1.2m Series A in November last year.