I'm new around here, so pardon my ignorance. That said, I did search around here for quite a while, and while I've seen a couple people allude to this possibility, it didn't seem like it has been fully explored, so I thought I'd ask around.
The basic question is this: the DeWalt DC9360 packs apparently contain some kind of speed controller, as witnessed by the fact that the variable-speed drill just has a potentiometer wired to the pack. So, could one build an e-bike with these packs without using a motor controller? What would be the drawbacks to such an approach?
Obviously the primary benefit to doing things this way is that you don't have to pay for a controller. This becomes a bigger benefit if multiple packs can be used in series with this method (thus saving a lot of money on a 72v controller, rather than a little on a 36v one), which strikes me as a much harder question to answer. Ideally I'd like to do a 72v (ok, really 66v) array with 6 or 8 batteries if this is possible.
If you like, head over to the motor forum where I'm about to ask whether a drill motor could be suitable for an ebike. Kinda looks to me like the Dewalt 36v drill (which comes with a battery and charger) is an ebike kit in disguise...just cut it up, add a rear wheel with an extra freewheel on the other side, a chain, some wires, and voila. Feel free to explain the huge things I'm overlooking.