i have a 12s chevy volt battery i am using and i looked on ebay and the only 12s bms that would work is $200+ in price.
the cheaper ones for ebikes come in 1, 2, 3, 4, 5, 6, 8, 10 13, 14 and 15 s i was wondering the bms modules like the ones used by hoverboards can the last cells be omitted so it will only recognize and charge 12s on a 13s bms for example? or would the missing cell be detected as a faulty cell and wont charge?
another option is to series connect 2 6s bms modules but if the voltages are not even wouldnt 1 bms draw unevenly and cause an imbalance in the charging?
also does the P+ and P- have to be connected or can i connect the charger directly to the battery and use the bms to balance will the bleeder circuits turn on from the battery or do they need power to the P+ and P- wires to activate? and power the charge controller?
i could possibly order from ebay a chevy volt bms module that was part of the car but being proprietary it is possible that the car's brain box or ecu or what ever the car's computer is called may be controlling the bms making it useless
verses
the cheaper ones for ebikes come in 1, 2, 3, 4, 5, 6, 8, 10 13, 14 and 15 s i was wondering the bms modules like the ones used by hoverboards can the last cells be omitted so it will only recognize and charge 12s on a 13s bms for example? or would the missing cell be detected as a faulty cell and wont charge?
another option is to series connect 2 6s bms modules but if the voltages are not even wouldnt 1 bms draw unevenly and cause an imbalance in the charging?
also does the P+ and P- have to be connected or can i connect the charger directly to the battery and use the bms to balance will the bleeder circuits turn on from the battery or do they need power to the P+ and P- wires to activate? and power the charge controller?
i could possibly order from ebay a chevy volt bms module that was part of the car but being proprietary it is possible that the car's brain box or ecu or what ever the car's computer is called may be controlling the bms making it useless
verses