I have an 8S LiFePO4 battery pack for my ebike project which I tried to charge using my suspicious lithium battery charger. The charger applied a voltage slightly higher than the battery voltage at any moment to charge it along with 1.5 A of current. For example, if the battery was at 26.2 V the charger applied 26.5 V and 1.5 A, and the voltage increased in the same proportion as the battery voltage increased. This was constant current charging.
The thing is, the charger cut off the charging while my battery was only 85-90% charged(26.6V) and never intiated the constant voltage charge. I just read somewhere that I need a charger which applies a constant voltage of 29.4 V to fully charge a 24 V LiFePO4 battery.
Did I damage my battery by charging it through a charger that doesn't fully charge my battery and give out constant 29.4 V? I may be just paranoid but it could be a serious thing. Can I continue using this charger in the long term which never initiates the CV charging? I'm fine with not utilising the remaining 10% SOC. I just want to make sure this kind of undercharging and this charger doesn't harm my battery in any way.
And i also heard that many bms' tend to start balancing the battery when it reaches a certain VOLTAGE (full charge voltage), if this is true..... doesn't it mean that my battery can become unbalanced in the long run as the bms may never balance the cells?
Note: I'm skeptical about buying a new charger because my current charger also lists 29.4V as maximum, but it never reaches beyond 27.4V while charging. I'm scared the new charger would do the same thing with my battery.