OpenSource Ampler

[davari.karim]

Hi all,

Woow, I'm surprised by what all of you have done in this forum. I'm control engineer and just bought a second hand Ampler Curt 2019 a week ago. Just to do some DIY projects. I didn't know anything about ampler before and I was just looking for a cheap ebike to start working on it.

I bought the bike with 1500 nok (150 euros). Then I really surprised how good is the ample and I felt im love with it.


The bike has some issue, it works it give assist. But red light is flashing on the button. The app doesn't work (it locks the bike, turns the light off but not on) and it does not show speed, voltage, speed, and....

I tried reseting, asked ampler to dk factory rest. Didn't work. They said I need ti purchase a new controller which will cost me 350EUR.


It seems like the controller is some how hanged or has software issues. just keep the red LED blinking evem with full battery (I rode it 40km in hilly Oslo).


I was wondering since you have opened everything on, have any ideas what could I do before making any new DIY on it.

I was considering to open the bike and disconnect battery from controller to to make it hard rest.


Do you have any ideas? And do you think I still could deploy any new controller on it?

 

[BB8]

The controller is cast into resin, so I think it would be hard to do a fix on this. However it would be interesting to see the insides

Disconnecting the battery is easy, there is a XT connector you can unplug

 

[WoTan]

Did u succeed?

No, not at the moment.
The Hawk has a 6A battery with NCR 18650PF (MH12210 - 2900 mAh) and with the new cells I want to get to 7A,
like with the current bikes.
I spoke to a few companies that assemble the cells (LG 18650MJ1 - 3500 mAh) but they said I would also need a new BMS.
So I think it would be better to buy the new 7A battery from Ampler.

 

[chrizztus]

Wow, it's impressive what you guys are doing. But before I think about replacing the ESC and the main controller, I need to narrow down another problem. And I think I've come to the right place here
My 2020 Curt has developed a tendency to shut off while driving (lights off, engine off) and cannot be powered on or charged (power supply flashing red). The first time this happened I removed everything, disconnected and reconnected the XT60 plug and it charged and ran again. Unfortunately now after 4 weeks I have the same problem again. Could be the cold weather in Berlin combined with 4 year old cells driven almost 14.000 km. Anyway, I would rule out a faulty controller, so that leaves the BMS or defective cells, what do you think?

 

[_Stephan_]

thx
would guess you cells are disbalaced. BMS shuts off because 1st cells are on low state during discharge - and charging process is stopped due to max SOC of other cells. So total capacity is low.