Sorry for laymen question, however I am trying to build a device that is to be chargeable from USB charger.
It's an audio circuit consisting of 2x 30w 8ohm speakers, amplifier, bluetooth module, step down voltage converter and power isolator.
Battery pack will be made of Li-Ion cells equipped with BMS. Question 1:
1) Assuming voltage of each parallel connected cell bank has max charging voltage of 4.2V is it possible to charge 11.1 V bank with 5V USB input through BMS? Does BMS charge each cell individually with fixed voltage or does it need full 11.1V or above to do this?
Assuming answer to above is 'yes, can be charged with 5v USB', then next question is:
2) What is the simplest/compact method of disconnecting the loads when charger is plugged in? Solid state relay or is there any better way?
I never dealt with BMS but remember model battery pack chargers plugged to car 12V socket being able to fast charge various voltages battery packs so I assume as long as input voltage is above cell's voltage BMS would charge.
It's an audio circuit consisting of 2x 30w 8ohm speakers, amplifier, bluetooth module, step down voltage converter and power isolator.
Battery pack will be made of Li-Ion cells equipped with BMS. Question 1:
1) Assuming voltage of each parallel connected cell bank has max charging voltage of 4.2V is it possible to charge 11.1 V bank with 5V USB input through BMS? Does BMS charge each cell individually with fixed voltage or does it need full 11.1V or above to do this?
Assuming answer to above is 'yes, can be charged with 5v USB', then next question is:
2) What is the simplest/compact method of disconnecting the loads when charger is plugged in? Solid state relay or is there any better way?
I never dealt with BMS but remember model battery pack chargers plugged to car 12V socket being able to fast charge various voltages battery packs so I assume as long as input voltage is above cell's voltage BMS would charge.