Press releases

Brill powering its way to making batteries smarter with $10.5m Series A round

Oxford University spin-out Series A funding round led by Legal & General Capital and Barclays.

19 Jul 2022

Full press release

  • Breakthrough intelligent battery management system saves money, spares increasingly rare materials and accelerates zero emissions
  • Proven technology deployed in enterprise stationary storage and residential battery applications
  • Investment will fund team growth and new product development for stationary energy storage and electric vehicles following a series of successful projects

Brill Power, an Oxford University spin-out company, announced the conclusion of its Series A round raising $10.5m today to support their mission to make batteries smarter, cleaner, safer and longer-lasting as a critical element of the shift to zero emissions energy. The funding will support team growth and new product development to expand presence in both static energy storage and the automotive sectors.

The round was led by two new blue-chip investors - Legal & General Capital and Barclays Sustainable Impact Capital Programme and supported by all of Brill’s existing investors including Oxford Science Enterprises, Oxford Investment Consultants, Big Rock Capital and Oxford University. Shell Ventures and Climate KIC have also become shareholders.

The investor confidence is driven by Brill Power’s pioneering development of a new way to manage batteries that suffers none of the limitations of previous methods. Brill’s optimised Active Loading method increases battery life by up to 60% and allows used batteries to discharge up to 46% more energy with a proprietary combination of hardware and intelligent software.

Brill Power’s technology is a key enabler for battery systems in applications including commercial & industrial on and off grid energy storage, residential batteries and electric vehicles in a battery market estimated at $400 billion by 2030 . Brill’s solutions are consistent with their new investor interests in partnering with enablers of clean energy generation including intermittent renewables as part of the wider shift to clean infrastructure, businesses and technologies.

Brill Power’s plans following investment round are threefold. The company will be doubling its team size across both engineering and commercial operations, while it will expand its product range for both static energy storage and for the world’s largest battery market – electric vehicles -  based on successful projects completed with Aston Martin, AMTE Power and Delta Cosworth. Finally, the funding will support the next phase in development of company’s data platform (BrillAnalytics) to help customers monitor and predict battery safety, health and performance data remotely.

John Bromley, Managing Director, Clean Energy at Legal & General Capital: "As we grow our climate and clean energy platform, investing in Brill Power is an exciting move into energy storage technologies that are crucial to enable an increase of renewables on the power grid, electrification of transport, and to power our homes, businesses and key infrastructure. Through extended lifetimes, improved safety, and waste reduction, Brill Power’s work is setting a new standard for how to store and use clean power to accelerate progress to our net zero emissions goals.”
James Ferrier, Head of Sustainable Impact Capital at Barclays: “Reliable and long-lasting storage solutions for renewable energy are going to be vital for a successful and orderly transition to a low-carbon economy. Pioneering technology, such as Brill Power’s battery management system, will play an important role and we are excited to be supporting them as they scale and extend their product range.”
Dr Chistoph Birkl, Brill Power’s CEO: “Thanks to our exceptional team at Brill, we have made great strides over the past two years. We have a ground-breaking commercial product in the marketplace and a pipeline of new developments and products to address the stationary energy storage and automotive markets. Our progress and our potential has attracted an impressive cadre of both existing and new investors. We are delighted to welcome Legal & General Capital and Barclays Sustainable Impact Capital on board while also enjoying the continued support of all our existing investors for this important journey ahead of us. We now have the means to act on the opportunity to offer the market step change improvements for zero-emissions technologies - for the benefit of our investors, our customers and also the community we serve.”

Editor’s Note: No Joule Left Behind – An Explainer

Every battery needs a battery management system (BMS) to ensure batteries operate safely and effectively.

Until now, BMS haven fallen into two broad categories, both of which impose limitations on battery system operations. One approach, active balancing BMS, are inherently expensive and therefore are not a scalable proposition for mass application, whereas more affordable passive balancing solutions introduce operating inefficiencies and wider safety consideration into battery control. Brill Power’s approach offers a third way that overcomes the limitations of these traditional BMS architectures.

Brill Power’s Active Loading method represents a step-change for BMS through proprietary algorithms that determine the state of health and power capability of every parallel-connected cell block in the battery with novel control circuitry to regulate the electric current accordingly. Stronger cell blocks are exposed to higher currents and weaker ones to lower currents. This ensures that every joule of energy is extracted from each individual cell during every discharge cycle. As a result, no single cell becomes the limiting factor in the energy storage capacity, power capability or lifetime of the battery system.

Brill’s proprietary Active Loading method BMS offers significant performance, cost of ownership, durability and safety benefits that are available to battery systems developers immediately, negating the need for expensive R&D into new battery chemistries.

The benefits of Brill Power’s BMS technologies include:

  • Up to 60% increase in battery lifetime
  • Up to 46% more energy for used batteries
  • BMS provides fully regulated output voltage, removing the requirement for costly DC/DC converters or charge controllers
  • BMS allows for battery maintenance and augmentation without shutdown
  • The BMS is future-proof for new battery chemistries and 2nd life batteries
  • The BMS provides a cloud-based analytics platform for remote system analysis and optimisation

Further information


Faye Bennett

Head of Housing PR

Legal & General Capital

Established in 1836, Legal & General is one of the UK’s leading financial services groups and a major global investor, with £1.2 trillion in total assets under management (as at FY23) of which c40% (circa £0.5 trillion) is international.

We have a highly synergistic business model, which continues to drive strong returns. We are a leading international player in Institutional Retirement, in Retail Savings and Protection, and in both public and private markets through our Asset Management division. Across the Group, we are committed to responsible investing and dedicated to serving the long-term savings and investment needs of customers and society.

As at 7 June 2024, we estimate the Group’s Solvency II coverage ratio to be 224%.

As at 11 June 2024, Legal & General has a market capitalisation of £14.6 billion.

Legal & General Capital (LGC) is Legal & General Group’s alternative asset platform, creating assets for Legal & General Retirement and third-party clients in order to achieve improved risk-adjusted returns for our shareholders. LGC has built its capabilities in a range of alternative sectors, including in residential property; specialist commercial real estate; clean energy; alternative credit; and venture capital, which are all supported by long-term structural growth drivers, meet a financing gap, and respond to a scarcity of supply that is underpinned by enduring societal needs.