31 Ah Square-Shell Sodium-Ion Power Cell | ATOMFAIRProduct Type: Sodium-ion battery product
Sodium-ion battery product
|
|||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||
|
BATTERY PROCUREMENT SUPPORT
For model selection, system matching or configuration confirmation, contact our technical sales team.
E-MAIL: inquiry@atomfair.com
|
|||||||||||||||||||||||||||||||
|
Supplier: Atomfair
Brand: ATOMFAIR®
|
The cell must be operated within the specified voltage window, temperature range, and current limits to prevent damage or safety hazards. Recommended state-of-charge range is 20-80% to achieve optimal cycle life.
- Voltage Window: Operating voltage must be between 2.0 and 4.0 V at or above 0°C, and between 1.5 and 4.0 V below 0°C.
- Temperature Range: Operating temperature range is -40 to 55°C, with performance guaranteed above 0°C.
- Current Limits: Continuous charge rate must not exceed 4C, continuous discharge rate must not exceed 6C, and pulse rates are limited to 6C charge and 10C discharge for up to 10 seconds.
- State-of-Charge Management: Recommended state-of-charge range is 20-80% for optimal cycle life.
- Cycle Life Expectancy: The cell retains at least 80% capacity after 10,000 cycles when tested under 20-80% SOC and 3C charge/discharge conditions.
How does the 31 Ah square-shell sodium-ion cell's low-temperature voltage window differ from its standard operating window?
Below 0 °C, the operating voltage window expands to 1.5–4.0 V, compared to the standard 2.0–4.0 V range used at or above 0 °C. This extended lower limit accommodates increased internal resistance and reduced ionic conductivity at sub-zero temperatures, as specified in the product's technical parameters.
What are the pulse current capabilities of this sodium-ion cell and how do they compare to its continuous ratings?
The cell supports 6C pulse charging and 10C pulse discharging for 10-second bursts, versus 4C continuous charging and 6C continuous discharging. This 1.5x to 1.67x increase in pulse current enables short-duration high-power demands, such as regenerative braking or acceleration in vehicle applications, without exceeding the cell's thermal limits.
What safety standard does the ATOMFAIR AF-SQ-31A sodium-ion cell comply with?
The cell passes GB 38031-2020, the Chinese national safety standard for electric vehicle traction batteries. This certification covers mechanical, electrical, and thermal abuse tests, including overcharge, short circuit, crush, and thermal runaway propagation, as listed in the product specification.
This 31 Ah square-shell sodium-ion power cell offers a nominal 3.10 V, 4C/6C continuous charge/discharge, and ≥80% capacity retention after 10,000 cycles under 20-80% SOC and 3C/3C cycling, but requires careful thermal management for low-temperature operation and limited usable SOC range for maximum cycle life.
Positive
- High cycle life at 3C/3C: Guarantees ≥80% capacity retention after 10,000 cycles under 20-80% SOC with 3C charge and 3C discharge, indicating robust durability for frequent high-rate cycling.
- High power charge/discharge rates: Supports 4C continuous charge, 6C continuous discharge, and pulse rates up to 6C charge / 10C discharge for 10 seconds, enabling high-power applications.
Trade-offs
- Temperature-dependent voltage window: Operating voltage window narrows from 2.0-4.0 V at or above 0°C to 1.5-4.0 V below 0°C, requiring BMS adjustments or derating for low-temperature operation.
- Limited SOC range for rated cycle life: The 10,000-cycle life specification is based on a 20-80% SOC window; full depth-of-discharge cycling will reduce cycle life, constraining usable capacity in long-life designs.
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).
