This M3 battery balanced, module1 defect.
Other module1 balancing to 3687 mv, after it replacing.

Screenshot_20251019_232928_Samsung Internet.jpg Screenshot_20251019_232933_Samsung Internet.jpg

The measurements of the cell voltages is really very accurate... I begin to admire the batman chip...

I know why it has to be very accurate, because the SOC of the LPF. Only one millivolt can be a soc ...

I see I have to do some more modifications, umin x 10, avg cellv, etc

I am really pleased about the balance boards. Balancing is I think almost twice faster now.
Sorry for Tom and Damian, but I did again a few modifications, and I'll explain why.

We do a lot of battery repair. Most model S/X but M3 is coming now... Bad cells, cheap, unfortunatly. When a defect pack ...

Hello,

After both boards communication problem, I do this:

Upload in state of .hex, .bin to 0x08000000.
After it upload .hex again, and both boards are working now.

I did not understand what the problem was, but both boards working now.
Balancing is fine, 10 sec even, 10 sec odd, 0.8 for ...

Both boards showing this message.

I can upload both boards your code, but cant see anything...

How many percent did balancing increase with your updates, do you think?

Hello,

I changed balancing a bit. If deltaV is big, BalHys grows.
20251017_063243.jpg
Also showed it in parameters list.
Screenshot_20251017_063257_Samsung Internet.jpg

But the strange thing is, I can upload it to both boards I bought, but 1 board it works, 1 led red constant, 1 led blinking ...

Yes almost same measurement, within 2mv.

I only do not understand why Tesla model S/X bleeding is thru 4x160 ohm resistance, so 40 ohm.

4v / 40 ohm = 100 mA

And I removed 1 brick wire, one which was/is bleeding, and measured 37 mA.

Why is Tesla 3/Y bleeding less mA? And how is it done? By ...

Cells balancing 95


I stopped balancing today, this is can readout.
If I had more time balancing would be perfect balanced within 1mv

Screenshot_20251015_062544_Samsung Internet.jpg Screenshot_20251015_062602_Samsung Internet.jpg

4mv imbalance
89 balancing
After 29 hours working time

Works nice for me, as expected, only little speed up ;)
I measured balancing/bleeding time is approx. 25%
Hopefully Tom can speed it up to 95 ...

We have a lot of spare parts, base, sport...

1 phase or whole inverter?

Repairing is possible, but mosfet mid under is diffecult/hard to replace.

I measured the amps (with a very percisely meter) and I measure its balancing.

I measured parallel the brick wire. The last and first brick wire current is flowing one way.
The middlest brick wires, current is flowing forward, a sec, and back a sec.
So it is bleeding, for sure...
So it seems it ...

I think he is doing something. But what?
5mv imbalance
52 cells balancing
It seems the lowest is more rising in state of the highest are decreasing...

Screenshot_20251014_074135_Samsung Internet.jpg Screenshot_20251014_074144_Samsung Internet.jpg

After a night, seems cell balancing does not do anything (spectacular) (Can be my fault)

Question for makers: cell balancing M3 module is done by resistance wire, right?

1: How did you imitate this ...

I have now a Standard Range battery, so 4x 24 cells.
Next Ill try a Long Range, 2x 25 2x 23 cells.
After it an LFP 108 bricks.

http://portal.greenaid.nl/TBC%2024015
Tesla Model 3 SR battery as home battery, still balancing now with Damian/Tom tool
http://portal.greenaid.nl/TBC%2024000
Tesla ...

Did a update to both boards....

With STM programmer. What a hell of a job... Without Tom, never succeed...

I replace very little:
Balance voltage is highest cell voltage - balhyst (0.002v)

Hopefully it will balance nice....

Screenshot_20251013_221958_Samsung Internet.jpg

Screenshot_20251013 ...

What happened if I connect a 108 bricks LFP battery?

tom91 wrote: ↑Sun Oct 12, 2025 4:26 pm Please explain what you changed to now get the data working again?

1 is good working, other is not working good, somethimes, I'll replace batman chip, I think resistance is too low faom some legs to eachother

A stupid error which I will correct , update the design on the repo and dump the remaining stock of boards at my cost.

Now they are working, and know what the problem is, I want to buy 2 more...
So please dont throw away...

Screenshot_20251012_164933_Samsung Internet.jpg

Its like a warm bath here...

Sorry for my behaviour... Thanks for helping me grown up.

I just checked the BMB thread and you got every help you could possibly want.

We spend 600 euro, soldered 4 chips, 2 myself, 2 by a pro, read and watched ...

Okay, it feels for me I have to say sorry... again...

But... isnt this a forum?
So you all rely on one or some few persons? "Dangerous", in my opinion.
Some guys with 4 stars, which sells some stuff which will not work, and who I have to beg to help me get it work?
Those you mean?

So if I ask ...

Thank you both for your warm welcome...