Error while charging

[Brillie35]

Well, due to a lot of things that happend lately, I still didn't openend my battery.
But i am planning for next weekend to make some time free.
Anyways, I remember reading somewhere on the forum what the numbering of the 4 modules was relative to the viewing in multitool.
But i can not find it anymore.

Is module 0 on top of the battery and 3 on the bottom?
Or the other way around?

Thanks

 

[snydes]

Other way around on a R pack. 0 is bottom, 3 is on top.

 

[Brillie35]

a little update on my progress fixing the code 35/36.
I did pull the battery apart, and found 1 wirebound that was not welded very strong.
It looked like it was attached one time, but you could see it was not welded as strong as the rest by inspecting it closely.

I did reconnect it by spotwelding a nickel strip on the -V edge.
And then i soldered a 0,5mm tinned copper wire from the current collecter to the strip.
Well, i did already soldered the wire to the nickel strip before spotwelding to make it less challenging.

 

[Brillie35]

Then i charged the bike fully, and waited for it to balance completly.
I was then able to erase the code 36/35 in Multitool.
And the difference in volts with the affected P group was only 0,01 V.
Before it was actually a little higher then the rest of the groups after charging.

 

[Redwolf]

Impressive, very interested to hear how the repair holds up after some trail miles.

 

[Brillie35]

Then i went for a ride.
And with around half of a charge left, connected it back to multitool.
At that point the fault code reappeared.
That was a little bit harsh after all the work and effort put in...
Loaded the data, and the difference in voltage during the ride between the P group was only 0,05V
Before this was way worse.
With a empty charge i have seen a difference before of 0,5V.
That would go to 2,5V for the P group.
So i did drain the battery further and connected it again.
The voltage difference at a low charge was now only 0,1V.
So at least thats a positive gain.

picture of a ride before and after the repair

 

[Brillie35]

I have a question about the balancing function in multitool.
What does it exactly do, and do i need to connect the charger?
When i click on it, every P group does get a dot at the bottom of the graph.
Does this mean it is going to lower all these groups?

After completly charging it again the voltage difference is back to around 0,015V.
And i can reset the code 35/36 again without it coming back.
I am hoping that in time the rest of the pack will age a little and the voltage difference at lower charge states will be low enough not to trigger any errors.

Not that it will matter very much,
but it gives a little peace of mind.

 

[Brillie35]

On a side note,
Does anybody had any problems with the original rear tire inner tube?
Me and my brother both teared one at the weld of the tube.
Never seen that before.
Must be a bad batch or something, or offcoarse the monstrous torque

 

[Rashid510]

The balance tool in MT does not really work all that well. That p-group went out pretty badly.

 

[Brillie35]

The balance tool in MT does not really work all that well. That p-group went out pretty badly.

I did not used it, because it gave an estimated time of 2 hours.
But would it do any better then the balancing with the charger?

 

[Mark911]

You'll never get that one group to balance the others without individually (separately) bringing the low P-group to within about .005v of the others. It's easy to do, just connect a 4 volt charger across those cells and watch the voltage carefully.

 

[Brillie35]

You'll never get that one group to balance the others without individually (separately) bringing the low P-group to within about .005v of the others. It's easy to do, just connect a 4 volt charger across those cells and watch the voltage carefully.

That crossed my mind when everything was opened up.
But i never would've guessed it needed to be that close to be able to balance.
Going to ride it a couple times and see if it gets any worse.
Then perhaps open it up again as the wheather is not so nice anymore.