I was thinking about making a battery pack that would alow me to select two voltages by electrically switching (via transistors) two parallel 5S battery packs into one 10S battery pack. It offers me a better efficiency than switched regulator.
But I don't know if I should use one 10S BMS or two 5S BMS? What if I would like to connect together three packs of cells? Three separate 5S BMS? I would like to charge the whole battery pack(2x or 3x 5S together) with a 5S charger.
Any suggestions or help is very appreciated. Thanks