The power source is a CC/CV charger, meant to charge an 8S (max 33.6V, min 26.4V) lithium battery. Let us assume that it is limited to 3A.
I need to to be able to also charge a 10S battery (max 42V, min 33V)
My initial thought was to add a boost converter to the battery circuity for the 10S battery. This would stay with the battery by the BMS.
Is there a way to do this? I'm slightly confused as to how boost converters function when their input current is limited. Ideally, once the boost converters output reaches 42V and the battery is fully charged the circuit will not draw any (or very little) current from the charger so that it can still operate its charge indication LED on the charger.
It's important to remember that the boost converter can't supply a constant voltage. If it tried to output a constant 42V the batteries would draw a lot of current trying to equalize charge. So the boost converter has to operate relative to its power input.
I'm not interested in modules I can purchase for this, I need to integrate this into a PCB I'm designing. If you can't tell, I'm much more experienced in digital electronics, not analog.
I need to to be able to also charge a 10S battery (max 42V, min 33V)
My initial thought was to add a boost converter to the battery circuity for the 10S battery. This would stay with the battery by the BMS.
Is there a way to do this? I'm slightly confused as to how boost converters function when their input current is limited. Ideally, once the boost converters output reaches 42V and the battery is fully charged the circuit will not draw any (or very little) current from the charger so that it can still operate its charge indication LED on the charger.
It's important to remember that the boost converter can't supply a constant voltage. If it tried to output a constant 42V the batteries would draw a lot of current trying to equalize charge. So the boost converter has to operate relative to its power input.
I'm not interested in modules I can purchase for this, I need to integrate this into a PCB I'm designing. If you can't tell, I'm much more experienced in digital electronics, not analog.