First BESS battery module with Brill active load balancing
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Brill Power in the UK has developed its first battery module for stationary storage with active load balancing.
The patented active load balancing technology provides a 60% increase in battery utilisation and improves system availability and safety through module level redundancy. The Helios battery module will be manufactured by Brill Power’s strategic partner, Dongguan Lithium Valley Energy in China.
Brill Power is an Oxford University spin-out that has developed hardware, software and analytics technologies to optimise the performance of battery systems, starting with electric vehicles and now moving into stationary Battery Energy Storage Systems (BESS). The technology is also embedded within all the BESS products of UK-based Palmer Energy Technology. It is also supplying the controller fro a second life system from Pretto in Italy that uses old EV battery packs.
The BrillCore, Brill Power’s patented battery management technology that provides intelligent active loading of battery modules to overcome the inherent limitation of the weakest cell in systems limiting performance. Active loading allows all of the energy from battery packs to be accessed within a string with continuous balancing during charge and discharge.
The BrillOS firmware platform has also been updated for Helios with full over the air updates that continuously optimise the embedded State of Charge (SoC) and State of Health algorithms. This reduces the divergence between the actual SoC and reported SoC for more accurate data.
Helios also improves availability by adding module-level redundancy and reducing both unplanned and planned downtime. Modules that fail are isolated, enabling the BESS rack and system to continue to function whilst rack DC voltage can also be retained thanks to integrated power conversion at rack level. Modules are also able to have SoC calibrated through independent charge/discharge cycles, which removes the need for full system charge/discharge cycles every for to six weeks.
“With our existing products already managing multi-MWh systems for some of our key partners, we are looking forward to working closely with existing and new partners to integrate the Helios module into utility scale BESS systems and improve the return on investment for BESS owners,” said co-founder and CEO, Christoph Birkl
The HELIOS battery module is available for orders immediately from Brill Power, with global deliveries commencing Q1 2026. Within China, The HELIOS module will be sold under licence by Lithium Valley.
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