It's BMS not working!

[xpluxmea]

Hello, I'v been looking the great posts here to get my own e-bike.
I got new cyclone kit, 720W motor with 36V controller from eclipse-ebikes.
http://eclipsebikes.com/chainwheel-custom-watt-p-991.html

I wired my headway battery pack purchased from KennedyAlternativeEnergy.com

I finished my building and connected them together, but nothing was working.
So could you look these pictures, and tell me what might be a problem here?

Firstly, The battery pack looks ok, since I measured the voltage from the battery pack and cells, and I got 38.71V for the pack and following for the celles
3.35 - 6.58 - 10.04 - 13.37 - 16.71 - 20.05 - 23.36 - 26.70 -30.04 - 33.38- 36.72 - 40.04
It's fine right?


I could figure out the connectors between the controller and motor, except the thine red wire. what's this for? and where does it go?


Am I missing something? or Which part Do you think is/are problematic here?

Thank you
Sunny

 

[deardancer3]

(to make things easier on those helping, please give cell votages across each individual cell rather than cumulative voltage to ground. )

You did of course throw the little switch on the throttle and got a green light ?

d

 

[TylerDurden]

Perhaps a close-up picture of the diagram on the controller would help too.

 

[rkosiorek]

the thin red wire is used to power up the controller itself. connect it to the (+) of the battery through a switch, or not, as the switch is optional.

rick

 

[xpluxmea]

(to make things easier on those helping, please give cell votages across each individual cell rather than cumulative voltage to ground. )

You did of course throw the little switch on the throttle and got a green light ?

d

Maybe this question would be dumb. Are the differences between cumulative voltages the one for each single cells?

 

[xpluxmea]

Thank you for your replies guys.

I was able to find that it was the BMS!! Although the battery with BMS provides around 38.7 V, it seems the BMS cut off a current at the moment of connecting. When the battery was connected to controller directly without the BMS, the motor worked.

So what's left to me is to check the BMS, the question is how? since I have no idea of how the BMS could be fixed, should I simply exchange it?

P.S. Interestingly, before I knew that the BMS was not functioning, and I had to be suspicious about every parts. I emailed EcliseEbike to explain the situation and expressed my intend of sending back to them for check/exchange. What happened is they blocked my email so the emails I've sent were rejected, and they did not reply to the inquiry I made through their website.
guaranteed one year warranty, and block email if you ask exchange? mmm.

 

[deardancer3]

I have a headway pack and a cyclone motor. It is hooked up for the BMS to control charging, but discharging is directly thru the cells.

It has worked fine for a while. You can do this until your new Bms arrives.

one opinion.

d

 

[Eclipsebikes.com]

Hi Sunny,

We got your email on Thursday regarding controller and replied on Friday though it seems our email system is now rejecting incoming mail which it annoyingly does from time to time. Did you not receive our response as outgoing mail still appears to be ok? Apologies for the confusion and our web guy should have it fixed soon.

As stated in our email if you connect the thin red wire from the controller to the + positive on the battery and that should hopefully solve the problem. You may need an extra length of thin wire to do this.

If thin red wire not connected to battery the controller will not take any current from battery. When the battery is low, the BMS should cut off the little red wire's current to protect the battery.

Please do not worry as your 1 year warranty is still more than valid

 

[xpluxmea]

Hi Sunny,

We got your email on Thursday regarding controller and replied on Friday though it seems our email system is now rejecting incoming mail which it annoyingly does from time to time. Did you not receive our response as outgoing mail still appears to be ok? Apologies for the confusion and our web guy should have it fixed soon.

As stated in our email if you connect the thin red wire from the controller to the + positive on the battery and that should hopefully solve the problem. You may need an extra length of thin wire to do this.

If thin red wire not connected to battery the controller will not take any current from battery. When the battery is low, the BMS should cut off the little red wire's current to protect the battery.

Please do not worry as your 1 year warranty is still more than valid

OK, now I see what's happening. I did not want to think that way first, but situations drove me to reach the thought that "I am blocked?".

Thank you for the response here. In case I need a further help, let me get back to you.

Sunny