Description
3200mAh Ultra-Low-Temperature 26650 Lithium Iron Phosphate (LFP) Cylindrical Battery (4-Pack)COMMERCIAL GRADE · PRODUCTION
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This battery has strict voltage and current limits that vary with temperature. It requires a low-temperature BMS to prevent charging outside safe temperature boundaries.
- Charge Voltage Limit: The maximum charge voltage must be set to 3.65 ± 0.03 volts to avoid overcharge.
- Temperature-Dependent Charge Current: Reduce the charge current to 0.2C or less when the cell temperature is at or below -20 degrees Celsius.
- Discharge Voltage Limit: Do not discharge below 2.00 volts at temperatures above -20 degrees Celsius or below 1.50 volts at temperatures below -20 degrees Celsius.
- Charging Temperature Floor: The cell will not accept charge below -30 degrees Celsius; ensure charging is disabled below this temperature.
- Low-Temperature BMS Requirement: Always use a low-temperature battery management system that enables charging only when the cell temperature is within the safe range.
This procedure outlines the correct steps for safely charging the LFP cell at low temperatures. Always follow these steps to avoid damaging the battery.
Required Equipment: CC-CV Charger, Low-Temperature Battery Management System (BMS)
- Verify Temperature
Check the BMS temperature reading to ensure the cell is within the allowable charging range of -30°C to 60°C. - Set Charging Parameters
Configure the charger to use a CC-CV profile and limit the charge current to 0.2C when the cell temperature is at or below -30°C. - Initiate Charge
Initiate charging only after the BMS confirms the cell temperature is within the safe range.
How does the discharge voltage cutoff affect usable capacity at extreme low temperatures like -40°C for the 3200mAh 26650 LFP cell?
To achieve >90% capacity at -40°C, the cell must be discharged to 1.5V, whereas at -20°C a 2.0V cutoff yields >90% capacity. At 60°C, >98% capacity is obtained with a 2.0V cutoff. This deeper discharge requirement at extreme cold means applications must support a lower minimum voltage to access full capacity.
What charging current and profile are required when charging the 26650 LFP cell at -30°C, and why is a low-temperature BMS essential?
At -30°C, a CC-CV charging profile with a current ≤0.2C must be used; the cell will not accept charge below -30°C. A low-temperature BMS is essential to ensure charging only occurs when the cell temperature is within safe limits, preventing damage from overcharging outside the allowable range.
What are the critical handling and infrastructure requirements for charging the 26650 LFP cell in sub-zero environments?
No pre-heating is needed; the cell charges directly at -30°C using ≤0.2C with CC-CV. Above 0°C, up to 3C fast charging is supported. Insulated terminal covers are included for safe transport, and cells are packed in anti-static plastic trays (50 per tray, 200 per master carton). A compatible low-temperature BMS is mandatory for safe charging control.
The 26650 LFP cell delivers 3200mAh with extreme low-temperature operation down to -50°C discharge and -30°C charge without pre-heating, enabling off-grid and cold-climate energy storage with high power output. However, charging current must be significantly reduced at sub-zero temperatures, and the discharge voltage cutoff shifts lower below -20°C, requiring careful BMS integration.
Positive
- Extreme-temperature charge/discharge without pre-heating: Direct charging at -30°C and discharging at -50°C eliminates the need for battery warmers, simplifying system design in arctic and cold-chain applications.
- High power and cycle life in cold environments: Supports 16A continuous (5C) and 32A pulse discharge with >90% efficiency at low temperatures, paired with 2000-cycle durability at 80% DOD for long-term field deployment.
Trade-offs
- Charge current derating below 0°C: Maximum charge current falls to 0.5C at 0°C and 0.2C at -20°C; at -30°C a CC-CV profile with ≤0.2C is required, significantly lengthening recharge times in extreme cold.
- Temperature-dependent discharge voltage cutoff: Minimum discharge voltage shifts from 2.00V above -20°C to 1.50V below -20°C, requiring a low-temperature BMS capable of adapting cutoff thresholds to prevent cell damage.
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). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
