Recent BMS update

Yes I agree - however I have not seen anything that confirms all cars will get the 450v update 🙂. Some dealers give no confidence that they’ve even heard of it let alone that they’ll update it!
 
Yes I agree - however I have not seen anything that confirms all cars will get the 450v update 🙂. Some dealers give no confidence that they’ve even heard of it let alone that they’ll update it!
At Glyn Hopkins East London today and they said that it will only be applied if my VIN number says it needs it...if it didn’t need it why did they do a BMS update in the first place??
 
This is the issue - so many inconsistencies and that just breeds doubt and more questions. I agree - I thought the BMS adjustment was to help battery longevity therefore should be applied across the board. Clearly not.
 
I’ve also seen posted suggestions that the BMS adjustment allows faster DC charging? Up to 87% before it drops off?
And better Regen breaking, perhaps they say that they’ll check the VIN number in case mine does already have it applied, which it doesn’t. Perhaps it’s a passing phrase so no commitment is made.
 
I agree - I thought the BMS adjustment was to help battery longevity therefore should be applied across the board. Clearly not.
My understand is that ALL cars will get the update.
However, they are concentrating on the cars that are most affected FIRST.
Which makes perfect sense.
The longer the owners of these affected cars continue to use / charge them, the pack becomes more and more unbalanced.
Each and every charge just makes the problem worse and worse,
Owners are charging their cars in an attempt to try and increase there range, but in affect are decreasing the range due to the HV battery not being able to perform a balance process.
This has all been caused by the “Buggy” software.
In Norway, the dealers are taking the cars in for anything from one to two weeks.
They are applying the update, then balancing the battery into a state that can then be handed back to the customer.
Oh ...... Rapid charging on affected cars, is making the problem a whole lot worse !.
Basically, the longer the “Buggy” software has been applied to your car, and the more charging cycles you have conducted, the more out of balance your pack has become.
MG are prioritising the cars that they know has received the “Buggy” update and dealing with them FIRST !.
It has become a race against time for these badly affected cars.
It is my firm belief that they will deal with currently unaffected cars at a later date.
It is truly in MG’s interest to get this problem nailed down ASAP in order to mitigate any long term implications for warranty claims that could arise for HV batteries damage claims in the future.
This is why I do believe that all cars will receive the update at some point in there lives.
I base this conclusion on pure common sense and what I learnt from @MilesperkWh when listening to the Monday night pod casts.
Maybe @MilesperkWh would like to confirm or correct my understanding on this mater please ?.
Otherwise this subject is going to be continually raised time and again.

Thank you in advance of your advice Miles.
 
My understand is that ALL cars will get the update.
However, they are concentrating on the cars that are most affected FIRST.
Which makes perfect sense.
The longer the owners of these affected cars continue to use / charge them, the pack becomes more and more unbalanced.
Each and every charge just makes the problem worse and worse,
Owners are charging their cars in an attempt to try and increase there range, but in affect are decreasing the range due to the HV battery not being able to perform a balance process.
This has all been caused by the “Buggy” software.
In Norway, the dealers are taking the cars in for anything from one to two weeks.
They are applying the update, then balancing the battery into a state that can then be handed back to the customer.
Oh ...... Rapid charging on affected cars, is making the problem a whole lot worse !.
Basically, the longer the “Buggy” software has been applied to your car, and the more charging cycles you have conducted, the more out of balance your pack has become.
MG are prioritising the cars that they know has received the “Buggy” update and dealing with them FIRST !.
It has become a race against time for these badly affected cars.
It is my firm belief that they will deal with currently unaffected cars at a later date.
It is truly in MG’s interest to get this problem nailed down ASAP in order to mitigate any long term implications for warranty claims that could arise for HV batteries damage claims in the future.
This is why I do believe that all cars will receive the update at some point in there lives.
I base this conclusion on pure common sense and what I learnt from @MilesperkWh when listening to the Monday night pod casts.
Maybe @MilesperkWh would like to confirm or correct my understanding on this mater please ?.
Otherwise this subject is going to be continually raised time and again.

Thank you in advance of your advise Miles.
I think Miles had made this point clear, but if your car is in for a scheduled annual service in my opinion it should be applied whilst it’s in, the car isn’t only in for the BMS update.
 
New to the EV driving so apologies if this has already been asked.

I got the latest BMS update yesterday and noticed the numbers displayed on the range increase, however I don’t think it’s actually done much to the actual range. After a full charge and equalisation last night the range in eco mode with everything off showed 170 miles. My wife has just done a 40 mile trip to work with the average miles/kWh showing 3.1, however the range left is displaying 75 miles. When I checked the voltage displayed this morning before she left it showed 440v. This is exactly what it would display prior to the update. Does anyone know if this is to be expected at the start? Or will things rectify themselves once I do a few more full charges / equalisations?

Also when I charge the car with around 15-20 miles left at either home or on public chargers I am noticing that the battery is only taking in around 29-31 kWh. I thought the battery capacity was meant to be around 42.5 kwh. The car is only a few months old and I don’t see where the remaining battery storage is being used. Is this normal or is there something I can do to try and rectify this?

Any help / advice is greatly appreciated.
 
New to the EV driving so apologies if this has already been asked.

I got the latest BMS update yesterday and noticed the numbers displayed on the range increase, however I don’t think it’s actually done much to the actual range. After a full charge and equalisation last night the range in eco mode with everything off showed 170 miles. My wife has just done a 40 mile trip to work with the average miles/kWh showing 3.1, however the range left is displaying 75 miles. When I checked the voltage displayed this morning before she left it showed 440v. This is exactly what it would display prior to the update. Does anyone know if this is to be expected at the start? Or will things rectify themselves once I do a few more full charges / equalisations?

Also when I charge the car with around 15-20 miles left at either home or on public chargers I am noticing that the battery is only taking in around 29-31 kWh. I thought the battery capacity was meant to be around 42.5 kwh. The car is only a few months old and I don’t see where the remaining battery storage is being used. Is this normal or is there something I can do to try and rectify this?

Any help / advice is greatly appreciated.
If your car is recovering from the old duff BMS it will take a little time to recover, please ensure you continue to go through the equalisation process and you will gradually see the voltage increase.
 
If your car is recovering from the old duff BMS it will take a little time to recover, please ensure you continue to go through the equalisation process and you will gradually see the voltage increase.
Thanks for that - I’ll keep doing the equalisation process after a full charge and fingers crossed it works.
 
Out of interest. Does anyone know why the equalisation stage of the charge times out after approximately 10 hours. Surely would be better if this could just be left to continue until the pack is balanced? Even if this would take 100 hours it would be preferable to having to discharge and charge again?
 
Out of interest. Does anyone know why the equalisation stage of the charge times out after approximately 10 hours. Surely would be better if this could just be left to continue until the pack is balanced? Even if this would take 100 hours it would be preferable to having to discharge and charge again?
A good question!
 
Out of interest. Does anyone know why the equalisation stage of the charge times out after approximately 10 hours. Surely would be better if this could just be left to continue until the pack is balanced? Even if this would take 100 hours it would be preferable to having to discharge and charge again?
They seem to have set a few charging related settings to 10 hours max. Why, who knows.
 
I think Miles had made this point clear, but if your car is in for a scheduled annual service in my opinion it should be applied whilst it’s in, the car isn’t only in for the BMS update.
IMG_2303.JPG


As you can see, after the newest BMS update, max range i got from my ZS EV is 203. Amazing result. It's worth it i guess. :))
 
Watching last night's podcast about the balancing. Did @MilesperkWh say that if you have the bad software it is not worth balancing as it is not doing anything, it may even make it worse. You need to wait until the update has been applied and then fast charge the car at every opportunity so that it will balance. Quick 5 mile trip to the supermarket and then charge.
 
Watching last night's podcast about the balancing. Did @MilesperkWh say that if you have the bad software it is not worth balancing as it is not doing anything, it may even make it worse. You need to wait until the update has been applied and then fast charge the car at every opportunity so that it will balance. Quick 5 mile trip to the supermarket and then charge.
Miles said if you’ve got the bad BMS the more you drive and charge the longer it will take to rectify the matter, try and get your car in urgently if you can.
 
Hi Miles

After the newest BMS update and battery equalisation, the max range I getting from my ZS EV is 203.

Chris
How long after the update did you start to get that reading? Also what voltage is it showing and do you know how much went into the battery? I feel my battery is only storing around 29-31kwh.
 
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