It is possible that the BMS (Battery Management System) discharged the cells when the battery packs were not in use for a long time. BMS systems are designed to protect batteries from overcharging and over-discharging, and they may discharge the cells to maintain a safe and healthy charge level when the battery pack is not in use for extended periods.
However, it is also possible that the cell is damaged or faulty, which is causing the low voltage reading. To determine the cause of the issue, you can try measuring the voltage of each cell individually using a multimeter. If the other cells in the battery pack have a higher voltage than the one with 0.08v, it could be an indication that the cell is damaged.
If the cell is indeed damaged, it may not be recoverable, and you may need to replace it. However, if the cell is just deeply discharged, you can try to recover it by charging it slowly with a low current charger to avoid overheating or damaging the cell further. If the cell voltage does not increase after several hours of charging, it may be too damaged to recover.
It’s essential to be careful when working with lithium-ion batteries and always follow proper safety precautions. If you’re unsure about the process of checking and repairing the batteries, it’s best to seek professional help or replace the battery pack entirely. For more information on BMS, go to Redway Power website. They specialise in making Lithium batteries and BMS