SpriteIsLucky said:
And finally, the battery plug. I don't know if it is relevant or not, but i noticed that it has 2 main pins, probably for the power, and 4 smaller ones. I believe these ones could be used for information transfer, and not just for power, which could indicate that there is indeed another "controller" in the batteries :
It's possible, but if that's the case, then it's likely your options are:
--take or send scooter (or control system) to scooter manufacturer or dealer that has programming software and hardware to set it up the way you want it to be
--get programming software and hardware from the manufacturer of the controller system or scooter, to change the settings yourself
--determining which pins are data lines between controller and everything else, and "snoop" on the communications under varying circumstances enough to figure out what is being sent and what it means, so you can then build/program something (arduino, etc) to insert between the controller and whatever is doing the limiting, and change *only* those data bytes that are creating the limiting. The controller does day it's "485 communication", which is the RS485 standard, so at least you can easily determine the voltages and signal types needed--but what is sent and how it's sent aren't included in that standard.
--disconnecting the speedometer completely (if it can't tell how fast it's going, it cant' limit the speed), and installing a completely separate speedo so *you* still know how fast it's going. This will disable all things related to speed sensing, though, so if it has any useful features depending on it, they won't work either.
--disconnecting the "receive" line on the controller so it can't get any data from the rest of the system, so it wouldn't be able to be limited. Or, if that's not how the limiting happens, disconnect the "send" line on the battery's "controller", to do the same thing. Either one requires determining which are the data lines, and then which is send and which is receive, probably by experimentation.
--replacing the controller with a generic one that connects directly to the throttle and any other controls, and uses it's own display (the one on the scooter probalby won't work anymore); this may also entail either hacking the battery to bypass the internal electronics or installing your own BMS, depending on whether the battery will operate with just direct main +/- connections to the controller or not, or if it's easy to figure out which pin(s) to ground or set to a voltage to enable the battery, etc.
There may be other ways I havent' thought of, possibly easier than any of those.