ZS EV Battery Upgrade

[kemot]

Aah okay, i understand that and offcourse an "updated" car is preferable.

Actually quite bad, the BMS can not be reprogrammed, the whole "Prevent theft" thing is not a good reason to not even make it so that a certified garage with MG tools, could not reprogram it.

I wish you luck in getting a "blank" BMS and getting it programmed, the ZS EV is a lovely car that, much like women, have some quirks

I have written to a ‘friend’ in China but he is unable to tell me at present how much it costs - for now I am enjoying the ride and efficient charging and am not thinking of replacing the BMS. Maybe in the future

 

[Coulomb]

On my photo you can see one CMU (Current Measurment Unit)

Cell Monitoring Unit. They measure voltage and temperature. Current is measured elsewhere for the whole pack; each cell current should be the same (barring current leakage).

 

[Eclectic]

Hi

On my photo you can see one CMU (Current Measurment Unit) module, there are actually 6 of them, one for each LiIon battery module.

There is no Electric Drive Module on it (I can't find one on the wiring diagram) but there is an Electrical Distribution Module (EDM) the orange one which is placed on the front of the battery where the blue arrow points. If you had a problem with the battery then I'm sure it was about these components.


PS. By the way, if someone would be looking I have for sale working LiIon modules from such a battery part.no.11313090 , CMU modules part.no.10995021, harnesses and the whole complete aluminium case ZS11EMCE with cover part.no.10767381 (sealed not damaged, all bolts are there) from my MG ZS EV LongRange - the battery has covered 15.000km in the car - write a direct message if you want more information

That's excellent, thanks very much for posting

 

[kemot]

Cell Monitoring Unit. They measure voltage and temperature. Current is measured elsewhere for the whole pack; each cell current should be the same (barring current leakage).

Current Measurment Unit is the official name of this module in the documentation that's why I wrote it that way. That's right that current measurement is done physically somewhere else (current transformers on the main bus) CMUs measure voltages on each cell and temperature of each package. The current throughout the circuit is theoretically identical because it is a series connection (except for minimum leakage currents)

Greetings to all

 

[Coulomb]

Current Measurement Unit is the official name of this module in the documentation

I'll take your word (and image) for it. That's obviously confusing and totally non-standard.

I just checked the MG4 wiring diagram, and find the same:

I guess that this is what we have to deal with Thanks for the correction to my bad "correction".