[EVO,100,R] CAN/ECU Bus Reverse Engineering (Roller + Batterie)

[RSchmidt]

Just wanted to say that if you are not certain of what you are doing then please dont attempt to rewire the cables yourself. Both the original Evo charger and the unoriginal charger has plenty of amps to kill you many times over, so please remember that these kind of amps are not a toy and you could harm yourself and in worst case it could kill you if you make a mistake. Always remember that electricity is dangerous. I have 25 years of experience with various electronics and even I have great respect for the possible damage these chargers can do. Also only charge when you are present and able to cut the power if something goes wrong. If a thermal runaway occurs in your battery you do not have much time to either get it outside or submerge it under water. Only other option is to flee. So please remember to be very carefull and be sure that you know what you are doing. Stay safe.

I have been charging with an unoriginal charger for my Evo since my original charger died last years at the ripe old age of 2½ years. I have now been charing with unoriginal charger for about 6 months and so far I have had no problems charging.

zock3r1608 have been of great help and I managed to make the unoriginal charger work with the use of his NIU charger software/firmware for the LilyGo CAN board. Many thanks to him for his amazing help.

I recently bought a new 3D printer so I decided to print a new box to store the cables for the charger and also connect all cables with Wago style connectors for simplicity and safety. The box contains cables, LilyGo Can board in separate smaller box and cables for 12v power supply. I will also explain shortly how to hook up the cables to make it work.

I recommend to remove the plug from the original Evo charger which is the other plug besides the 220v plug. It is incased in potting material but if you remove the material down the inside of the charger there are not electronics in the way. There are 4 screws to remove and then you can pull out the plug (after you disconnect the wires) and a short bundle of cables will be connected to the plug.

There are 2 cables for 72v, 2 cables for 12v and a white plug with 4 cables in different colors. The 4 coloued cable runs through a ring magnet to remove noise in the cable and this ring magnet can be removed easily from the potting material. Only 2 of the 4 cables in the white plug is used for unoriginal charger and those are the yellow and the green. These 2 cables are the CAN L and CAN H cables.

The 2 thick cables from the NIU charger plug is 72v. Black is negative (-) and white is positive (+). These I have connected to the black and red cable on the cable from my original charger. This charger has an XT60 plug. I will post the amazon link to the charger I have bought and which I can ensure will work for charging MQI GT EVO 72 batteries. I only charge 1 battery at a time, and the charger is 8 Amp, so it takes about 4 hours to charge both batteries from ~25-100%. I you have another charger then you might have a different plug than the XT60. The charger I bought costs around 135-140 EURO. You can also select from different plugs and I went with XT60 for its simplicity and ability to handle the amps and voltage.

The 2 remaining cables that is needed from the NIU charger plug is the 2 for 12v which I have connected to a regular 12v power supply, where I have removed the plug and removed insolation from the 2 wires. There are usually some sort of white markings on one of the wires to indicate negative and positive cables. To check which is which use a multimeter or google it.


Thats was it for now. Link for charger I bought and pictures below.


https://www.amazon.de/-/en/Charger-Elec ... SLL98?th=1