Lost Ekey A2B rfid controller torque sensor salvage

[JeffMoore]

Hi all, So great to be here, I have been enthusiastic and passionate about ebikes for about 16 months now, 6 bikes so far and have situation i am trying to resolve:
I got a 2014 A2B Alva+ without battery, charger, or ekey. I've acquired a battery and charger 36v10Ah, to get things tested. I get 12v up to the display which is waiting for that rfid ekey to tell it to turn on. so, I am wondering If I use the 12volt going to the dark display, convert it to 5v and apply it to the hot side of the throttle connection is it likely that would power up the bus inside the epoxy potted controller that feeds the torque sensor and throttle so that it can be ridden under power? It is under powered by today's standards but the quality is very high on everything. Yes I could spend $500 on a new controller and display, baserunner/cycleanalyst, and get it going, but then what upgrade battery and charger for another 4-5 hundred, a $1000 on a 9 year old bike! I'm hoping to get lucky with back-feeding voltage into the controller and get it going before wasting money on a deluxe control system that might not make the bike rideable or sellable.

anyone familiar enough with controllers to say if it's a good risk. Otherwise it's dispose of this controller anyway, maybe get a KT cheap, tie the torque sensor to the throttle input and see what it does for around $60. I hate trashing anything that is still usable, for our envirenments sake.

thank you
jeff

 

[ChristopherMorgenstierne]

Hi,
Happy to see I am not the only one!
I have got an A2B Hybrid24, and got the battery refurbished (≈500$). In the meantime, wife has trashed the electronic keys...
Do you have any idea about a workaround?
I have studied your text, some of it I don't grasp. What is the 'KT' 60$-solution?
The best,
Christopher, Denmark

 

[ChristopherMorgenstierne]

Hi all, So great to be here, I have been enthusiastic and passionate about ebikes for about 16 months now, 6 bikes so far and have situation i am trying to resolve:
I got a 2014 A2B Alva+ without battery, charger, or ekey. I've acquired a battery and charger 36v10Ah, to get things tested. I get 12v up to the display which is waiting for that rfid ekey to tell it to turn on. so, I am wondering If I use the 12volt going to the dark display, convert it to 5v and apply it to the hot side of the throttle connection is it likely that would power up the bus inside the epoxy potted controller that feeds the torque sensor and throttle so that it can be ridden under power? It is under powered by today's standards but the quality is very high on everything. Yes I could spend $500 on a new controller and display, baserunner/cycleanalyst, and get it going, but then what upgrade battery and charger for another 4-5 hundred, a $1000 on a 9 year old bike! I'm hoping to get lucky with back-feeding voltage into the controller and get it going before wasting money on a deluxe control system that might not make the bike rideable or sellable.

anyone familiar enough with controllers to say if it's a good risk. Otherwise it's dispose of this controller anyway, maybe get a KT cheap, tie the torque sensor to the throttle input and see what it does for around $60. I hate trashing anything that is still usable, for our envirenments sake.

thank you
jeff
View attachment 345908View attachment 345909

(Is this any use?) https://scootergrisen.org/scooterhjemmeside/download/a2b_metro_servicemanual.pdf

 

[slaphappygamer]

The “KT $60 solution” means to buy a KT controller and display to replace the existing system. KT controllers and displays have good enough documentation to get most bikes running nicely. The system is highly configurable. This is a great inexpensive option for ebikes that have no manufacturer support or have a dead/aged electrical system. Such as bypassing a proprietary switch.

From the diagram, I can’t tell if the motor is brushed, or brushless. The KT controllers are only for brushless motors.