Description
3000mAh 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 cell requires strict temperature-controlled charging and discharging within -30°C to 60°C and -50°C to 60°C respectively. A low-temperature Battery Management System (BMS) and specific charge current limits are mandatory for safe operation.
- Temperature Limits: Charge only between -30°C and 60°C; discharge between -50°C and 60°C; the cell will not accept charge below -30°C.
- Charge Current Limits: Use a reduced charge current of ≤0.2C at -30°C with a CC-CV profile, 0.5C at temperatures between 0°C and -20°C, and up to 3C above 0°C.
- BMS Requirement: Always pair with a low-temperature BMS that enables charging only when the cell temperature is within the safe operating range.
- Transport and Storage: Transport and store in anti-static plastic trays with insulated terminal covers to prevent short circuits and mechanical damage.
This procedure ensures safe charging of the battery at extreme low temperatures down to -30°C. Follow the correct CC-CV charging profile and use a compatible low-temperature BMS.
Required Equipment: Low-temperature Battery Management System (BMS), Programmable CC-CV charger, Calibrated thermometer or temperature sensor
- Verify Cell Temperature
Measure the battery surface temperature using a calibrated thermometer to confirm it is between -30°C and 60°C before initiating charging. - Connect BMS
Connect the battery to a low-temperature BMS configured to disable charging if the cell temperature falls outside the safe range. - Set Charging Profile
Program the charger to a CC-CV mode with a maximum charging current of 0.2C if the cell temperature is at or below -20°C, or 0.5C between -20°C and 0°C. - Monitor Voltage
Monitor the charging process to ensure the voltage does not exceed 3.65 ± 0.03 V throughout the constant-voltage phase.
What is the trade-off between high-discharge current and efficiency when operating this 26650 LFP cell below -20°C?
Below -20°C the maximum continuous discharge current drops from 10C to 7.0C, but the cell still delivers >90% discharge performance at -40°C (to 1.5V) and >90% at -20°C (to 2.0V). This means capacity retention remains excellent even at reduced current, making it suitable for high-power cold applications without significant energy loss.
What BMS and charging profile are required for safe charging at -30°C without external heating?
Charging at -30°C requires a CC-CV profile with a reduced charge current of ≤0.2C, and the cell must be paired with a low-temperature BMS that enables charging only when the cell temperature is within safe limits. The cell will not accept charge below -30°C, so the BMS must also prevent charging if the temperature falls further.
Why does the minimum discharge voltage change at -20°C, and how should equipment be configured for cold-weather use?
Below -20°C the minimum discharge voltage is lowered from 2.00V to 1.50V to maintain >90% discharge performance at extreme cold. Equipment or BMS must have an adjustable low-voltage cutoff that can be set to 1.50V to avoid premature shutdown and access the full 3000mAh capacity in sub‑-20°C conditions.
This 3000mAh LFP 26650 cell enables charging at -30°C and discharging at -50°C without external heating, with 10C continuous discharge below -20°C at >90% efficiency, making it suitable for arctic and cold-chain energy storage. However, charge current must be derated to 0.2C below -20°C, and a low-temperature BMS is required to enforce safe temperature limits.
Positive
- Extreme low-temperature charge/discharge: Direct charging at -30°C and discharging at -50°C without pre-heating eliminates the need for external battery warmers in polar or off-grid cold-climate installations.
- High continuous discharge at sub-zero: Supports 10C continuous discharge below -20°C with >90% capacity retention, providing high power output for EVs, telecom backup, and cold-chain logistics under extreme cold.
Trade-offs
- Slower charging below 0°C: Maximum charge current is derated to 0.5C at 0°C to -20°C and further to 0.2C below -20°C, significantly increasing recharge time in freezing conditions.
- Requires low-temperature BMS: Safe operation mandates a BMS that enables charging only within the cell's allowed temperature window, adding system-level design and cost constraints.
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).
