If you think these LFP cells can be charged using typical lead acid CC/CV (constant current > constant voltage + CV duration), at voltages approaching 3.60V per cell, think again.


The BMS on any LFP battery should PROTECT the cells from this sort of damage. Unfortunately the engineers who designed this battery believed what they read in the misleading & poorly written, Chinese manuals/spec sheets and..... FAIL...


This BMS:


Allowed the cells to be over charged which led to diminished capacity and cell swelling.


Allowed the cells to also become over-discharged


DESIGN FAIL.. Just because you have a BMS it does not necessarily mean your cells are going to be safe when connected to a typical lead acid CC>CV charging source. When the Chinese say it is okay to charge to 3.65VPC they mean is to charge there and then stop charging. Lead acid charging continues to charge and maintain the voltage for a period of time that is far too long for LiFePO4 cells especially if we are pushing into the upper knee range of 3.65VPC / 14.6V. If you charge LFP at a lower and safer voltages, which are more compatible with a short CV duration (charge current dependent of course), this sort of episode is considerably less prone to occur.