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7. BATTERY CHARGING
7.1. When to Charge your LiFePO4 Battery
If LiFePO4 batteries are not fully discharged, they do not need to be
charged after each use. LiFePO4 batteries do not get damaged when
left in a partial state of charge (PSOC). You can charge your LiFePO4
batteries after each use or when they have been discharged up to 80%
(20% SOC). If the BMS disconnects the battery due to low voltage, at
100% depth of discharge, remove the load to reconnect the battery
circuit and charge immediately. Please note that we recommend storing
batteries at 50% state of charge (SOC).
7.2. Charging Temperature
Lithium Iron Phosphate batteries generate a fraction of the heat of other
lithium chemistries making them very safe. LiFePO4 batteries can safely
charge between -4°F to 131°F (-20°C to 55°C). However, at temperatures
below 32°F (0°C) the charge current must be reduced as follows:
1. 32°F to 14°F (0°C to -10°C) charge at 0.1C (10% of the battery
capacity)
2. 14°F to -4°F (-10°C to -20°C) charge at 0.05C (5% of the battery
capacity)
LiFePO4 batteries do not require temperature compensation for voltage
when charging at hot or cold temperatures. All RELiON LiFePO4 come
with a BMS that protects the battery from over-temperature. If the
BMS disconnects due to high temperature, wait until the temperature
reduces and the BMS reconnects the battery circuit before using or
charging the battery. Please refer to your battery data sheet for BMS
high temperature cut-off value.
RELIONBATTERY.COM • 855-931-2466
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