Blog
What Does The LiFePO4 Voltage Chart Show?
The LiFePO4 voltage chart illustrates the electrochemical behavior of lithium iron phosphate batteries, showing voltage variations during charging/discharging cycles and state-of-charge (SOC) relationships. It highlights the stable 3.2V nominal voltage, 3.65V charging plateau, and 2.5V cutoff threshold, with thermal stability up to 750°C. Pro Tip: Maintain charging below 3.9V/cell to prevent electrolyte decomposition and capacity fade.
What are the key voltage parameters in LiFePO4 batteries?
LiFePO4 cells operate with a flat discharge curve between 3.2-3.3V under load, dropping sharply below 2.8V at full depletion. Charging terminates at 3.65V/cell (absorbing 95% capacity), though some systems permit 3.8V balancing peaks. For example, a 12V LiFePO4 pack contains four cells with 14.6V full charge and 10V discharge cutoff.
Wholesale lithium golf cart batteries with 10-year life? Check here.
How does temperature affect LiFePO4 voltage behavior?
Below 0°C, ionic conductivity decreases, raising internal resistance and causing voltage sag. At -20°C, a fully charged 3.65V cell may read 3.4V under load. Conversely, high temperatures (>45°C) temporarily increase open-circuit voltage by 0.03V/°C. Pro Tip: Winter charging requires battery warmers – LiFePO4 can’t safely charge below freezing without lithium metal deposition.
| Temp (°C) | Charge Voltage | Capacity Retention |
|---|---|---|
| -20 | 3.45V max | 65% |
| 25 | 3.65V | 100% |
| 60 | 3.60V | 85% |
Redway Battery Expert Insight
FAQs
This reflects the flat voltage curve – between 20-80% SOC, voltage only changes 0.15V. Use coulomb counting (Ah tracking) for accurate SOC measurements.
Can I use lead-acid voltage settings for LiFePO4?
Want OEM lithium forklift batteries at wholesale prices? Check here.
Absolutely not! Lead-acid chargers overcharge LiFePO4 (16V vs 14.6V for 12V systems), risking thermal runaway. Always use chemistry-specific chargers.
How to Determine the Year of Your Hyster Forklift by Serial Number
