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

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Interessantes Thema. Das ist zwar etwas OT, aber von euch weiß nicht zufällig jemand wie man die Yadea 20S 20Ah Akkus "freischaltet"?

[josch91]

Ich denke Zock wird es schaffen, dass der Lilygo CAN Adapter der Steuerung des Roller mitteilt, dass zwei Akkus angeschlossen sind. Auf ähnliche Weise lade ich aktuell mit jedem beliebigen 84V Ladegerät meine NIU Akkus.

Wäre sehr cool. Bei mir läuft der Roller 1A. Bin bis auf die Reichweite sehr zufrieden.

Wenn man dich unterstützen kann Zock sage Bescheid…

[zock3r1608]

Hi,

ja kannst du mir ein passendens Akkupaket zur Verfügung stellen?

Das verbaute BMS muss irgendwie eine Beschreibung des Protokolls mitbringen sodass man den SOC usw. auslesen kann. Zum Bsp Daly, JK o.ä.

[RSchmidt]

Hi,

thats no problem.

If you have basic electronic skills:

Just buy a LilyGo T-CAN485 and a Honda 6 Pin diag plug from AliExpress or eBay and flash my firmware onto it: https://git.0-c.de/Crash_Override/NIU_C ... eryChecker

I am working on a One-Click flashing solution but it is not ready yet. So follow instructions on git.

Then you can charge your batteries with the 3rd party charger. I recommend to open your charger up and limit the voltage to 82,6V, to have some headroom to max voltage of the cells. There are often small potentiometers on the control PCB.

Otherwise I have one T-CAN and a Diag lead left, I can ship you.

Do not exceed 10 Amps of charging current if you use the original socket. You can go up to 20Amps charge current (I tested so far) but with a dedicated charging lead connected to the FOC. https://elektroroller-forum.de/viewtopi ... 39#p364739

I have an EVO which has done almost 16.000km on the 2 original batteries. Now I have problems with charging the batteries and I am not sure what exactly is causing the problem. The charger remains constant green when I plug in battery/batteries. The indicator on the batteries blink but charger does not switch to red light which signals charging. If I unplug the battery while charger is still turned on then the green light flashes so the charger sees that the battery/batteries are removed. I dont think it is likely that both batteries should have become faulty at the same time so I lean towards the charger being faulty but since it is caked is some form of silicone it is a nightmare to do more than just basic troubleshooting.

I get battery circuit error when running diagnostic from app, but I can activate scooter and wheel spins when I use the throttle.

I would like to buy your solution for charging with 3rd party charger as that is a fairly resonable solution in terms of cost and I am not willing to invest 2.000 EUR in original charger as my EVO is 3 years old and batteries are fairly used. I work as an IT Tech so I have fairly good electronics skills. I write in English as my German is very rusty.

Do you have a pre-flashed card with housing and diagnostic lead in stock I can purchase from you?

I live in Denmark, so Eu shipping is no problem.

[zock3r1608]

Hi,

Yes, I checked. One NIU plug is still there; I just need to make the cables and print another case, then I can ship it to you.

[RSchmidt]

Hi,

Yes, I checked. One NIU plug is still there; I just need to make the cables and print another case, then I can ship it to you.

Sorry for taking a long time to response, but I got a LilyGo from a friend and today I got a 84v charger and I have now charged one of my two batteries to 100%. The second battery can show info in BatteryChecker but will not start charging. Seems the voltage perhaps dropped too low, so I will try leaving charger plugged in to see if I can get it to wake up. I am a bit worried that I might not be able to get it to wake up.

I want to transfer those 35 EUR to you for your help and for the work you have done, but you do not need to send me any hardware. Send me a PM with info where I can transfer money.

[zock3r1608]

Did you get any response from the dead battery or nothing at all?

Nice work!

I created a simple Flash Programm to easily flash the firmware (and of course for updates) to the T-CAN485.
https://firmware.turboserv.0-c.de/?dir=NerdFlasher

I accept donations via paypal for example (c@pfalz-mail.de)