battery management system

A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, controlling its environment, authenticating it and / or balancing it.A battery pack built together with a battery management system with an external communication data bus is a smart battery pack. A smart battery pack must be charged by a smart battery charger.

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  1. P

    Long term effects of bad BMS?

    Is there any info known about the potential long term impacts of having the bad BMS software? I.e. after fully balancing and recovering to 449v, does the battery still hold 42.5kwh or has the BMS caused any long term deterioration? I don't have the equipment to take any exact readings but...
  2. S

    BMS

    Is there a way of finding out through settings what BMS update you have?
  3. D

    Do I have the comfort 2 update and correct BMS software ???

    Hi again EVers - My media/nav shows outside temperature. My drivers dash screen shows remaining range. However, my car does not charge from my 7kW charger without the doors being locked. when I plug in teh charger it just says connected but not charging until I lock the doors. Also, When I got...
  4. Pattolad

    Has anyone rejected a car due to bms fiasco

    Hi, Bought my car 2 weeks ago ex demo 3200 miles and after its second fast charge its lost range dramatically 2 miles is taking 25 of the range.Spoke to my dealer today and they cant fit me in till the 29th to investigate. Really considering just giving them the car back and walking away...
  5. G

    BMS Update?

    Is it necessary to get the January BMS Update if my car did not get the bad one last year? My dealer Eric Stead said that it was only needed if the car had the bad one to put it right and that MG would tell them what updates the car was in need of. The car in question is a ZS EV and was bought...
  6. slarod

    MG ZS EV, "GOM", summer of 2021, not 1969, range 353km, 362km and 370km in 3 days, 5 months since new BMS

    Hmmm, so what did go wrong after all, since the update this year in january, trusted granny charging, not much other going on, now in "Norwegian" summer, or is it ?, the range is back, or what ? Separate trips with re-charge @home with this on the "GOM" after 5 months, who can beat that, just...
  7. Orcadian

    BMS Update

    There has been a lot of talk about the "Bad BMS" update. I picked my ZS EV up in October 2020. Everything seems to be OK> I think it was programmed before the bad BMS. What is the advantage of the new BMS? Bearing in mind it will be quite costly to take the car to an MG Dealer (Ferry costs etc.)
  8. G

    First Service BMS upgrade anxiety

    It’s real guys!!! Sitting here at the dealership waiting for my ZS EV to have its first service and software upgrade l can’t believe how nervous l have become. When the technician said, “it’s ok sir, we’ll take good care of her” and walked off, it felt like she (ZSEV) was going into surgery 😀 l...
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  10. E

    BMS update???

    My zs ev is just 2 weeks old, I gave it a full charge until the MG light went out. As in the photo it only went to 455v, I would have thought being new it would have had the update taking it to 449v, or does it take a while to adjust? also it only gives me a distance to go of 138 miles, not what...
  11. D

    Charge dropping out sins BMS update

    Hi has anyone had be a similar problem since BMS update:. I've had 2 episodes when connecting to public 7kw charger the car has just dropped out after about 20min. First time drew 3.7 kw of charge, the 2nd time was 1.7kw of charge. CPS have checked the unit and they appear to be charging fine...
  12. notdodgy

    Battery management system

    Garden strimmer battery has failed. Duff BMS? Lot of electronics for a 5 cell battery...
  13. Stuart Wright

    MG EVs special podcast: All your MZ ZS EV BMS Bug Frequently Asked Questions ANSWERED

    In the latter part of 2020, some MG ZS EVs had a software version installed which contained a bug which caused the batteries to become imbalanced. In this interview, Miles Roberts will answer the questions that the MG EVs community have about this software update. 00:00:00 - Introduction...
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