UK-Based Breathe Battery Technologies Raises $21 Million to Expand EV Battery Software Platform

Breathe Battery Technologies, a British developer of physics-based battery software for electric vehicles (EVs), has raised $21 million in Series B funding to scale its operations and expand its product suite.

The round was led by Swedish investment firm Kinnevik AB, with continued participation from existing backers Lowercarbon Capital and the Volvo Cars Tech Fund. The capital will be used to further develop Breathe’s technology, grow its team, and more than double the size of its London laboratory, which the company says is now the largest battery testing facility in the city.

The company introduced three new products—Breathe Model, Breathe Map, and Breathe Design—aimed at enhancing its software toolchain that supports battery design, validation, and optimization. These offerings build on Breathe’s adaptive charging software, Breathe Charge, which will be integrated into Volvo Cars’ upcoming ES90 electric sedan.

“Breathe has evolved to become a leading company in battery technology, with the funding and infrastructure to match our ambition,” said Ian Campbell, CEO of Breathe. “Our software toolchain improves EV charging for end-users and helps manufacturers cut costs, reduce risk, and accelerate battery system development.”

Kinnevik investment manager Sam Marsden highlighted battery performance as a major bottleneck in EV and consumer electronics adoption. “A growing number of manufacturers are realising that Breathe’s technology is fundamental to not only solving this critical problem, but also influencing battery system development earlier,” Marsden said.

Breathe’s lab houses over 696 testing channels—including 150 automotive-grade channels—and has accumulated more than 2 million hours of battery testing data to support its physics-driven development approach.