Gazza_AU
Member
Simplicity:
1) Use an array of ULN2003 switches with a current limiting resistor to deliver the charge from a capacitor (supercap?) across each cell individually. Have the super cap charged to the peak desired cell voltage before applying to each battery.
2) Cycle this continually, the cells with lower charge will receive extra charge, and you will approach cell balance after sufficient iterations.
2 ULN2003 switches per cell, one needs to source the other sink?
What is the difference in circuit for each using ULN2003 Darlingtons?
I like the idea, not sure if the current would be sufficient or not.
Paralleling ULN2003 Darlingtons for 1A, might make an alternative more attractive.
Would I need to compensate for any voltage drop across Darlingtons??