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LiNa Energy successfully demonstrates Na-ion technology for battery energy storage systems

Solid-state sodium-ion battery company LiNa Energy (earlier post) successfully completed an independent demonstration of its lithium-free sodium batteries for energy storage systems with commercial partner ion Ventures. The test was performed independently at HORIBA MIRA and was funded via support from the UK’s Department for Business, Energy, and Industrial Strategy (BEIS).

The test saw a 1kW/1kWh LiNa system perform dynamic containment—a key revenue stream for battery energy storage systems in the UK which requires rapid injection and absorption of power to maintain the grid’s frequency.

Maintaining a narrow operating frequency is key to the electrical grid’s health, avoiding blackouts and generator trips. Traditional hydrocarbon-based sources of electrical generation provided inertia to the grid as turbines would spin synchronous with the grid frequency and generator trips would be buffered by momentum.

UK-Frequency-Diagram

As these traditional sources of generation are displaced by invertor-based renewables, maintaining grid frequency has become more challenging. Dynamic Containment is one of a set of frequency response ancillary services that National Grid procures from battery asset owners whereby power is automatically dispatched in proportion to the deviation of the grid’s frequency from set point per the response profile below.

DC-Response-Chart

The demonstration was performed in a 1 kWh system containing LiNa’s lithium- and cobalt-free solid state sodium battery cells. In order to ensure a robust test, a 1kW Dynamic Containment commitment was simulated against a repeating abnormally volatile frequency input, specifically EFA Block 3 on 6 Jan 2022. The test was performed continuously for 5 days and tested over a range of states-of-charge. The test was also run simultaneously with a charge and a discharge profile to demonstrate the critical ability to stack revenue streams.

The demonstration was conducted as part of BEIS’s Energy Entrepreneurs Fund which supports the development of technologies, products and processes in the areas of energy efficiency, power generation, heat generation, energy storage, reducing greenhouse gas emissions and security of supply. LiNa Energy demonstrated the technology with ion Ventures—an international developer of renewable generation, clean electrification schemes and optimized, flexible power infrastructure.

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