Breathe Battery Technologies, a frontrunner in physics-driven battery software, has closed a $21 million Series B funding round. With this investment, Breathe is significantly broadening its offerings—transitioning from a singular embedded software solution to a robust suite that includes battery simulation tools, embedded systems, and end-to-end services. This expansion aims to support every stage of the battery development cycle and solidify Breathe’s role as a full-spectrum partner in energy innovation.
The round brings in new investor Kinnevik AB, with continued backing from Lowercarbon Capital and Volvo Cars Tech Fund. The funding will accelerate Breathe’s growth, expand its physics-based battery software capabilities, and more than double the size of its London laboratory – now the largest battery testing facility in the city.
This investment comes as Breathe launches three new products – Breathe Model, Breathe Map, and Breathe Design – forming a comprehensive expanded battery software toolchain that enables customers to design, validate and optimise better batteries, faster.
The new products joining Breathe’s portfolio include:
- Breathe Model: Advanced cell simulation software that frees developers from the constraints of empirical testing with high-level simulations based on physics-based electrochemical and thermal dynamics
- Breathe Map: Performance mapping service that reveals what your battery is truly capable of
- Breathe Design (coming soon): Cell design software that enables engineers to create more performant, cost-effective battery systems with system-level, contextual knowledge
These new products complement Breathe’s existing Breathe Charge adaptive charging software, which Volvo Cars recently announced will be featured on its upcoming ES90 sedan. Breathe Charge dynamically controls the charging current by managing internal electrochemical states. Together, the battery toolchain addresses core industry challenges such as hardware overdesign, late-stage testing surprises and lengthy development cycles, enabling battery developers to move faster and make data-driven decisions.
Dr. Ian Campbell, CEO of Breathe said:
“Breathe has evolved to become a leading company in battery technology, with the funding and infrastructure to match our ambition and deliver a major impact on battery innovation. The industry can no longer afford incremental progress, it needs transformative technology that makes batteries fundamentally better. Our software toolchain improves EV charging for end-users and helps manufacturers cut costs, reduce risk, and accelerate battery system development. This funding allows us to expand our technology capabilities, our team and our lab so we can push battery performance further.”
Sam Marsden, Investment Manager at Kinnevik AB said:
“Battery performance continues to be a driver of poor user experience and lower adoption within the electric vehicle and consumer electronics markets. As evidenced by the company’s partnerships with the likes of Volvo Cars and Oppo, 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 to avoid unwanted risks or avoidable performance gaps. Kinnevik is thrilled to be partnering with Ian, Yan and the rest of the team to continue delivering previously unseen levels of battery innovation, in a seamless way, to a greater number of customers.”
Clea Kolster, Partner at Lowercarbon Capital said:
“We backed Breathe again because this is exactly the kind of boundary-breaking we look for. Breathe proves that software can unlock massive electrification gains without having to wait on a chemistry miracle.”
Ann-Sofie Ekberg CEO, Volvo Cars Tech Fund said”
“Charging isn’t just about being fast or slow anymore, it’s about delivering a consistent experience that makes EV ownership effortless for customers. Breathe’s technology enables us to optimise charging across a wide spectrum of real-world conditions, improving speed and consistency while protecting battery health. Breathe’s software and expertise give us critical insights earlier in the development, allowing us to make more informed decisions, reduce risk, and ultimately create more efficient battery systems.”
Breathe’s London lab has now expanded from 7,500 sq. ft. to an additional 6,000 sq. ft., featuring over 696 testing channels including 150+ automotive channels and more than 2 million hours of battery testing data. The company has grown its team to 75 employees, including a dedicated lab team, and operates under ISO 9001 and ISO 27001 standards for quality and data security.
