From cell chemistry to a working battery system. AuroraCell brings together sodium-ion cells, R&D, battery design and technical support to help you make informed engineering decisions.
Ions move through the electrolyte. Electrons travel through the external circuit. Charging reverses the process.
A sodium-ion battery stores and releases energy by moving sodium ions between two electrodes. The chemistry, cell construction and operating conditions determine how it performs. “Sodium-ion” alone is not a performance specification.
Common positive-electrode families include layered oxides, polyanionic compounds and Prussian blue analogues. Hard carbon is widely used for the negative electrode. These combinations have different voltage, power and lifetime characteristics.
Capacity in ampere-hours does not tell the whole story. Compare usable energy, continuous and pulse current, internal resistance, dimensions and thermal behaviour for the exact cell model.
The operating voltage window, battery management system, charger, inverter, connections and enclosure must work together. A cell specification is the starting point for a system design.
AuroraCell’s existing technical material includes NCO sodium-ion examples using NaCrO₂ and hard carbon. The video and graphs below show why this chemistry is worth evaluating for demanding storage applications: its response to thermal abuse, its cycling performance and its stability during elevated-temperature cycling.
The side-by-side footage shows the tested AuroraCell sodium-ion specimen releasing vapour or smoke, while visible flames develop in the commercial LFP specimen during the shown sequence.
This is a direct illustration of the tested cells’ different responses under destructive thermal exposure.
The NCO graph combines the latest reported retention checkpoints for three cell formats with a straight-line extrapolation to 30,000 equivalent full cycles.
The dashed continuation shows projected potential, not a completed 30,000-cycle test.
This ongoing-test figure compares the AuroraCell 210Ah NCO cell and an LFP reference at 60°C, with C/2 charging, C/2 discharging and 100% depth of discharge.
C/2 charge · C/2 discharge · 100% DoD
AuroraCell confirms approximately 98% capacity retention for the 210Ah NCO cell after 1,000 cycles at 60°C. In the source comparison, the LFP trace falls below the marked 80% retention level, with the figure annotating 927 cycles.
For engineering evaluation, this is evidence to examine for warm-environment cycling. It is separate from cold-weather performance and from thermal-abuse safety.
These examples describe selected NCO cells and the referenced tests. They do not establish the performance of every sodium-ion chemistry, every AuroraCell product, or a finished pack. Discuss the relevant cell model and available supporting test data with AuroraCell.
Long cycle life, strong temperature performance and lower thermal-management demand make selected sodium-ion chemistries an attractive alternative to LFP. The biggest advantages come from matching the chemistry to your application’s duty cycle.
| Design priority | Sodium-ion advantage | What this means for your system |
|---|---|---|
| Lifetime | 30,000+ cycles with selected chemistries. Sodium-ion can support exceptionally long service life and frequent cycling. Actual lifetime depends on the cell chemistry, temperature, C-rate, depth of discharge and end-of-life criterion. | Potential for more lifetime energy throughput and fewer battery replacements. Compare product-specific cycle-life ratings under equivalent conditions; the NCO graph above separates reported checkpoints from projections. |
| Cold operation | Stronger cold-weather capability. Selected sodium-ion cells retain more usable capacity and deliver higher discharge power than comparable LFP cells at low temperatures. | More dependable winter operation and potential to reduce preheating demand. The selected cell’s charging limits and discharge limits determine the actual benefit. |
| Hot operation | High capacity stability at elevated temperatures. AuroraCell’s 210Ah NCO cell retains approximately 98% capacity after 1,000 cycles at 60°C in the featured comparison, at C/2 charge and discharge and 100% DoD. | Substantially better retention than the LFP reference in this comparison, which falls below 80% at 927 cycles. This supports evaluation for warm environments and demanding daily cycling. |
| Cooling & heating | Less energy spent on temperature control. A wider usable temperature window and favourable thermal behaviour can reduce cooling and heating requirements compared with conventional LFP systems. | Potential for lower auxiliary energy use and simpler thermal management. The reduction depends on the chemistry, power profile, ambient temperature and pack design. |
| Safety | Favourable response to thermal abuse. In the featured comparison, the tested AuroraCell sodium-ion specimen releases vapour or smoke while the LFP specimen develops visible flames. | A strong reason to evaluate selected NCO cells for safety-focused applications, together with the appropriate BMS, protection functions and system design. |
| Energy density | A compelling balance for stationary storage. Sodium-ion’s lifetime and temperature advantages can outweigh lower energy density where compactness and weight are less critical. | Prioritise usable energy, operating reliability and lifetime throughput alongside the available installation space. Compare the exact cell and complete pack. |
AuroraCell helps you select the sodium-ion chemistry and system architecture that turn these advantages into practical benefits for your application.
A useful technical discussion connects every headline figure to a cell model, measurement method and operating envelope. These are the questions to resolve before a design is frozen.
Specify depth of discharge, C-rate, temperature, voltage limits and capacity retention at end of life. Keep measured results separate from lifetime projections.
Record the permitted ranges and current limits for each. A cold-discharge result does not establish cold-charging capability.
Review the relevant test reports, protection strategy and failure response. Avoid treating “sodium-ion” as a guarantee of non-flammability or zero thermal-runaway risk.
Distinguish nominal energy from usable energy. Include voltage cut-offs, load profile, conversion losses and reserve settings.
Match series configuration, BMS settings, balancing, charger and inverter limits. Define communication and protection behaviour before integration.
Connect the datasheet, sample identification, test report and supplied product revision. Confirm what documentation is available for the intended application.
AuroraCell combines cell and system supply with R&D, battery design and technical support. The scope of engineering work is agreed around your application, existing equipment and project stage.
Energy demand, peak power, operating temperature, installation space and target service life form the design brief.
Compare candidate cells against the electrical, mechanical and supply requirements. Identify the information still needed.
Discuss pack architecture, BMS requirements, charging strategy and integration constraints as part of the agreed development scope.
Agree the prototype checks, operating limits and documentation needed to decide whether the design is ready for the next stage.
Three illustrative evaluation scenarios show how requirements change between applications. These are engineering examples, not completed customer projects or performance guarantees.
Store daytime PV generation for later use and define the intended backup loads.
The engineering question
How much energy is usable, which inverter is compatible, and what power is available during backup operation?
Support a defined load for a specified hold-up time, with predictable recharge behaviour.
The engineering question
Can the system deliver the required pulse or sustained power at minimum state of charge and the site temperature?
Evaluate peak shaving or renewable-energy integration against the site’s actual load profile.
The engineering question
How do cycling, efficiency, power limits and calendar ageing affect lifetime energy throughput and system economics?
Start with the principles. Confirm the numbers against the selected product and its documentation.
A sodium-ion battery is a rechargeable battery that transfers sodium ions between its electrodes during charging and discharging. It belongs to a family of chemistries, so voltage, capacity, power and lifetime vary between cell designs.
There is no universal safety ranking for every sodium-ion and lithium-ion cell. Electrode materials, electrolyte, cell construction, state of charge and pack protections all matter. Compare relevant test evidence for the exact products and installation.
Use the selected cell’s cycle-life data together with the test conditions and calendar-ageing information. A cycle count without depth of discharge, temperature, C-rate and retained-capacity threshold is not enough to predict service life.
Do not assume a direct replacement. Check the full voltage range, series cell count, charging limits, BMS configuration, communications and inverter compatibility. Similar nominal pack voltages do not guarantee compatible operation.
Yes. AuroraCell supports cell selection, R&D, battery design and technical integration alongside the supply of cells and systems. Share your requirements to agree a suitable scope, deliverables and validation approach.
Tell us your target energy, peak power, voltage range, operating temperatures and project stage.
