46 Ah Square-Shell Sodium-Ion Power Cell | ATOMFAIRProduct Type: Sodium-ion battery product
Sodium-ion battery product
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Supplier: Atomfair
Brand: ATOMFAIR®
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The cell requires strict adherence to operating voltage and temperature limits to prevent irreversible damage. Storage at recommended state-of-charge between 20% and 80% is necessary to achieve the specified cycle life.
- Voltage Limits: Maintain operating voltage between 2.0 V and 3.65 V above 0°C, and between 1.5 V and 3.65 V below 0°C.
- Temperature Range: The cell is designed for operating temperatures from -40°C to 55°C.
- State-of-Charge for Longevity: For optimal cycle life exceeding 10,000 cycles, operate within 20-80% SOC.
- Safety Compliance: The cell has passed GB 38031-2020 safety testing for electric vehicle traction batteries.
- Mechanical Integrity: The aluminum square-shell enclosure must not be deformed or punctured to avoid short circuits.
What is the low-temperature voltage window and capacity trade-off for the 46 Ah square-shell sodium-ion cell?
Below 0 °C, the operating voltage window narrows to 1.5–3.65 V from the standard 2.0–3.65 V range used at or above 0 °C. This shift accommodates increased internal resistance at low temperature but reduces usable energy; the source does not specify the exact capacity derating below 0 °C, so precise low-temperature capacity must be confirmed with the supplier against the target application.
Can this sodium-ion cell be integrated into a pack designed for lithium-ion BMS and cooling systems?
Integration requires careful matching of the 2.0–3.65 V operating window (1.5–3.65 V below 0 °C), 4C continuous charge and 6C continuous discharge limits, and the 175 x 27 x 204 mm form factor with 123 ±0.3 mm pole center distance. The BMS must be reprogrammed for sodium-ion voltage thresholds and the cooling strategy must support the thermal profile of 4C/6C continuous rates; the source does not state direct compatibility with standard lithium-ion BMS hardware.
What are the handling and safety certification requirements for this sodium-ion power cell?
The cell passes GB 38031-2020 safety testing as listed in the specification, which covers electric vehicle traction battery safety requirements in China. The aluminum square-shell form factor requires standard precautions for large-format prismatic cells, including insulation of terminals, avoidance of short circuits, and mechanical restraint to prevent swelling during cycling. The source does not specify UN38.3 or other transport certifications, so these should be confirmed before shipping.
The 46 Ah square-shell sodium-ion cell delivers 3.10 V nominal, 4C/6C continuous charge/discharge, and over 10,000 cycles at 80% retention under 20-80% SOC, making it a robust candidate for high-power, long-life applications but with a restricted voltage window at sub-zero temperatures and a recommended SOC window for optimal cycle life.
Positive
- High pulse power capability: Supports 10C pulse charge and 20C pulse discharge for 10 seconds, enabling high-power bursts for demanding applications.
- Extended cycle life at partial SOC: Achieves at least 80% capacity retention after 10,000 cycles under 20-80% SOC and 3C charge/discharge, providing long operational durability.
Trade-offs
- Reduced voltage window below 0°C: Operating voltage range narrows from 2.0-3.65 V to 1.5-3.65 V when temperature drops below 0°C, which may limit usable energy and require adjusted BMS settings.
- Optimal cycle life requires SOC constraint: The 10,000-cycle guarantee is based on a 20-80% SOC window, meaning only 60% of rated capacity is used for maximum longevity; full SOC cycling may reduce cycle life.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
