BMW GENERATION 5 packs (IX3 etc) - opening / reuse / reverse engineering

[Swing]

I'm also working on Gen5 packs - have started some documentation on the dala wiki:
https://github.com/dalathegreat/Battery ... 7-Platform

I also have a battery emulator feature branch that has basic support already. https://github.com/dalathegreat/Battery ... ix-support. Currently don't have contactors, balancing or iso measure working (I also need to crash reset my SME) but the rest works. Is anyone able to get some logs from an IX/iX3/i4/i7 on the canFD bus between SME/EME/CCU/BDC?

Thanks!

Thanks for the pinout amongst others! I got pretty close, but close is useless when it doesn't work.
So you can see battery cell and temperature information right now?

I am just interested in getting either the CSC slave or CSC + the unit is connected to, which I see as BMS but I have to understand the roles better.
I just want the battery info and of course balancing which we don't know yet. Everything more is always nice.
But mine also had a pretty big crash so I am sure all the pyro fuses are blown and I might need to reset something if I use all the components, don't know how.

I got the whole thing dismantled now but eager to test it when I have time.

Edit: The ETH-WUP wake up signal just needs a 12v+ for several seconds? After which CAN traffic starts?

[cloudy]

It won't send CAN on it's own & it's also CAN-FD at 500/2mb - not standard CAN. You can hold wake high it seems - and it'll stay awake waiting for CAN. It'll start sending it's messages with just a counter sent to it on 0x0C0 (you'll see it in the code)

Yes basically all interesting values are mapped and being read, including all cell voltages. FYI pyro replace is not enough to get active battery control working - so depends if just the monitoring alone is useful to you.

Also, whilst BMW do a great job of insulating all parts in this - don't get complacent because of it. If you have the pack open, use your class 0 gloves + gauntlets and insulated tools as a minimum!

[Swing]

It won't send CAN on it's own & it's also CAN-FD at 500/2mb - not standard CAN. You can hold wake high it seems - and it'll stay awake waiting for CAN. It'll start sending it's messages with just a counter sent to it on 0x0C0 (you'll see it in the code)

I probably got the wiring right but had no clue about the wake up procedure. I will check the code of course, when I have more time.

Yes basically all interesting values are mapped and being read, including all cell voltages. FYI pyro replace is not enough to get active battery control working - so depends if just the monitoring alone is useful to you.

Thats great. I am going to put the IX3 battery in a van. Getting cell voltages and temps is great for now so I can make some test drives. Can go quite a while without balancing I expect, but at some point it will be needed. Hopefully by then we got that information.
What is extra nice is that I have a Deye 20kW inverter, that I will be able to supply with battery info this way. That inverter will be in the van, also used as AC charger.
I also need to supply the Siemens drivetrain with CAN bus messages about battery, I already got that working, but could integrate that here as well.
There I do my own precharge circuit for the Siemens ELFA2. But it would be nice to have a BMS operate a main contactor based on the cell voltages and temps, even though balancing is not working yet.
Anyway, there is some customization involved in the project, which I can do myself, but just missing necessary info.

Also, whilst BMW do a great job of insulating all parts in this - don't get complacent because of it. If you have the pack open, use your class 0 gloves + gauntlets and insulated tools as a minimum!

Yes I have my gloves and I already drained the coolant and unmounted everything.
Battery case is empty and will be taken away.
So cannot test anything now.

[cloudy]

iX support is now in main release of battery emulator - do still need someone with an un-crashed battery to test contactors with though!

[Swing]

iX support is now in main release of battery emulator - do still need someone with an un-crashed battery to test contactors with though!

Great!
Still without balancing right?

[cloudy]

Correct, need canlogs (CANFD) from working vehicle to proceed - even an uncrashed pack remains in balancing off mode. Suspect it needs vehicle messages and maybe drive mode flag.