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Troubleshooting
The 12.8V LiFePO4 batteries are extremely reliable batteries that provide greater useful
life than comparable 12V lead-acid batteries. Despite the high reliability of the 12.8V
LiFePO4 batteries, you may encounter situations where the battery does not operate as
expected. These situations are typically the result of misuse, abuse or a non-optimal
operating or storage environment. This part details potential issues you may encounter
with the 12.8V LiFePO4 batteries and the appropriate troubleshooting procedures.
Charger Trips using Constant Voltage
Problem:
CV charger trips when charging the batteries.
Causes:
This is due to the low impedance of the battery creating a current inrush.
Solution:
Reset the charger and try again.
Terminal Voltage Absent or Low
Problem:
Using a multimeter to check terminal voltage shows the terminal voltage is low.
Causes:
1. The battery is overheated, causing the microprocessor to enable over-temperature
protection.
2. The voltage of a cell within the battery dropped below 2.5V, causing the
microprocessor to enable low-voltage protection.
3. The battery
’
s SOC dropped below 5% from either an extended idle period or heavy
use, enabling low-voltage protection.
Solution:
To resolve situations where terminal voltage is absent or low:
1.
Allow the battery to cool and then recheck terminal voltage.
2.
Connect the battery to a charger to wake the battery and recover terminal voltage.
(
≤
30V PV panel can be used to activate a deep discharged battery.)
(A 12V VRLA battery can also be used to activate a deep discharged battery.)
3.
If the cells pack voltage is below 7V, the BMS will not be activated anymore. So, it
needs to be charged in time after deep discharge.
