I'm building a new battery for my son's power Wheels, apparently people who run it off of their 18 volt tool batteries report that there's too much voltage and there's problems with gears stripping. I've replaced the old 12v SLA it came with with one of my small lithium packs, and it makes a huge difference in torque, which translates to power and speed through the yard.
I'd like to add one more cell, to make the nominal voltage 16v, I think that will add a little bit of speed, while not adding too much voltage. I could physically fit a sixth cell, but if I did that, I would need to redo the entire "drive train" with a PWM controller, rather than the simple switches it comes with. If I go over 5S, I might as well just do a 24 volt battery with speed controller, which is what I'm trying to avoid.
At max, it pulls about 60 amps, so I'd like a 70 amp minimum BMS, that can do 5s. I can find lots of 5S ones for lipo, but not LiFePO4.
Any advice is greatly appreciated.
I'd like to add one more cell, to make the nominal voltage 16v, I think that will add a little bit of speed, while not adding too much voltage. I could physically fit a sixth cell, but if I did that, I would need to redo the entire "drive train" with a PWM controller, rather than the simple switches it comes with. If I go over 5S, I might as well just do a 24 volt battery with speed controller, which is what I'm trying to avoid.
At max, it pulls about 60 amps, so I'd like a 70 amp minimum BMS, that can do 5s. I can find lots of 5S ones for lipo, but not LiFePO4.
Any advice is greatly appreciated.
