Charging a Li-Ion Battery for Electric Scooter
I  don’t understand what you trying to do.
To charge lithium we use CC CV mode.
We use constant current to charge the cell until it reach full voltage then switch to constant voltage to charge until the current dropped below 0.1 of CC current then we cut the charger off and indicate full chart.
Also you should use BMS module to protect battery and keep cell voltage balance.