Built in-house,from materials to mission
A sodium-ion battery energy storage platform and a purpose-built battery management system, co-developed as a single architecture — delivering intrinsic safety, genuine wide-temperature operation and a 20-year service life, without the capital cost and parasitic load of active cooling.
Cell-to-Pack Platform
Chemistry-agnostic structural design. Our pack architecture is engineered to accommodate both polyanionic (NFPP) and layered-oxide cathodes, allowing us to match cell chemistry to the client's duty cycle rather than forcing a single compromise.
High-capacity prismatic integration. 300 Ah+ prismatic cells integrated through cell-to-pack (CTP) architecture with structural adhesive bonding, delivering improved volumetric efficiency and a 40% reduction in cyclic expansion force versus conventional LFP modules.
Platform scalability. Standardised modules scale from C&I cabinets to multi-MWh grid-side blocks, with 1-to-8-hour duration configurable at the system level.
Battery Management System — Where Others Fall Short
A generic lithium BMS cannot manage a sodium pack. Sodium's steeply sloped, temperature- and age-dependent open-circuit voltage curve and its wide operating voltage window break the assumptions that lithium BMS algorithms are built on. Our BMS is written for sodium from the ground up.
Adaptive state estimation. A dual extended Kalman filter with online parameter identification, coupled to an electro-thermal cell model, continuously tracks SOC, SOH and internal resistance — rather than relying on static lookup tables. Field accuracy of ±3% SOC is maintained across the full −40 °C to +60 °C envelope and throughout cell ageing.
Wide-window power interface management. Because sodium packs swing across a far wider voltage range than LFP's flat plateau, the BMS actively coordinates the DC-link window with the PCS, applying SOC- and temperature-dependent power derating curves in real time. This prevents nuisance under- or over-voltage trips and unlocks the pack's full usable energy.
High-current active balancing. Sodium cells exhibit greater initial divergence than mature lithium cells. Bidirectional active balancing at module level, combined with passive bleed trimming, keeps string divergence under control and protects usable capacity over a 20-year life.
Predictive thermal control. Sensor fusion across a distributed NTC array plus impedance-derived internal temperature estimation enables predictive derating — the system reduces power before a thermal limit is reached, rather than tripping after it.
Diagnostics and digital twin. Cell-level telemetry streamed to a cloud digital twin, with intermittent electrochemical impedance spectroscopy during charge rest periods. Growth in internal resistance, micro-short signatures and gas-related anomalies are detected months before they become faults — enabling condition-based maintenance instead of scheduled replacement.
