Hi all, I'm a bit late to the party... but I've taken apart quite some of the gen1 and gen2 e-golf batteries.. there is no need to cut the pack open! I only cut the tabs where bolts are, to get access to the glue. with a 'long box cutter' style knife you can cut the glue and then pry the cover open ...

it would be great if these contactor control boards can be used on other projects!

I can arrange a few of these units if people want to play with them.

Hi,

would a 6s board (from audi Q7 PHEV) be any good for you? same board but less components. I have a couple of them (without temperature senders)

about multiple VW packs: I've experienced heavily unbalanced modules when using a CANbus brigde to offset addresses. Not sure what happened but might have to do with the modules seeing those messages and doing strange things...

also consider the VW / audi, GTE / e-tron batteries, 8,8 - 10 kWh and 10C without a cringe.

Did you measure the capacity (SOH?)

What generation / capacity? 24 kWh / 41 kWh / 50 kWh?

the last two are popular to upgrade 24 kWh Zoë's with, so are more expensive usually.

There is a full internal plastic casing that holds everything, the the aluminium for head transfer in the middle and two cast ends. the two cast ends are laser welded 360 degree. No way in without a saw or grinder. Hm... Multitool then, it might be easier on the alu shell and insides. So you are su...

Hi Damian,

I have 3 left in the pack I have... do you need 'no 1' or can it be an other?

Ok, other idea: check if first and last celltap have connection with cell, put a nut on it to be sure, and disconnect the big connector when doing this. (by the way: always disconnect the big connector when working on the modules, the CMU's are easy to break) do disconnect connector, check / fix cel...

The picture shows a 4 wire connection: so without terminator resistor in the CMU used. to terminate: use 6 wire plug (originally: 8 wire) and connect the second pair to the canbus (on the second pair there is a resistor in the CMU The errors you describe are exactly what happens when the bus is not ...

Hi Johu, can it be the low cells are balancing when measuring? this could also give such results.

Pretty cool unit. do you know prices?

I've heard it's an spi signal.

two wires between slaves and to BMU