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. M

    Bms update 2024Hi

    Hi everyone, newbie in MG Zs ev and would appreciate some help. Few weeks ago on my way from work, suddenly my Mg zs ev my21, displayed several faults,mostly with driver assistance packages (ACC, Hill Asst,Brake asst, forward collusion warning, e.t.c) not available. I called MG dealer and I...
    • mattEV
    • Thread
    • battery management system driver assistance faults mg zs ev update
    • Replies: 4
    • Forum: MG ZS EV Forum
  2. E

    Battery management system

    Hello, I have just recently got my MG ZS EV mk2. I have successfully binded the car to the app however I cannot change the target battery level to 80% after a lot of thinking in the app I get a failed message. Also when trying to do it from the car directly i get the below error exactly as...
    • egouder
    • Thread
    • battery battery management system mg zs ev
    • Replies: 4
    • Forum: MG ZS EV Forum
  3. P

    Mismatch with %age and efficiency on MG5 Long range EV

    We’re really enjoying our new MG. 890 miles now from new as a pre-reg with 6 miles on the clock. I’d be really grateful for any thoughts please. . . I did a balance charge after 712 miles on our granny charger overnight yesterday and travelled 89 miles straight after this morning using 39%...
    • Paul Walker
    • Thread
    • battery battery management system charging efficiency grannycharger long range mg5
    • Replies: 27
    • Forum: MG5 EV Forum
  4. G

    MG4 51kwh Battery Management System problems?

    Hi, Anybody having battery problems with their MG4? I've had no problems up until this last week, now suddenly the cars battery seems to drain at an insane rate. Last week my car dropped from 52% down t0 31% within 19 miles and an average of 2.5kwh efficiency (anyone else seem to think there...
    • gjdalk1
    • Thread
    • battery battery management system mg4
    • Replies: 16
    • Forum: MG4 EV Forum

  5. Second service BMS issues

    Second service BMS issues We have an early gen1 ZSEV Exclusive, low mileage, that we registered from new in 2020. It went through all versions of the BMS updates because we were having timed charging problems and needed to ensure any vehicle software issues were eliminated. By August 2020 it...
    • Deleted member 1355
    • Thread
    • battery management system bms mg zs ev
    • Replies: 4
    • Forum: MG ZS EV Forum
  6. profdraper

    Best battery charging practices

    I wonder if longer term owners of the 2021 MG ZS EV might be able to share their experience about battery charging? I've owned the ZS EV for about six months now and almost always charge at home on a 7kW wallbox scheduled for overnight off-peak power rates. This practice follows the MG...
    • profdraper
    • Thread
    • battery battery charging battery management system charging mg zs ev
    • Replies: 19
    • Forum: MG ZS EV Forum
  7. S

    BMS - which version?

    I have my service scheduled for later today and want to ensure I get the BMS update that allows for more rapid charging. I rarely ever see much more than 60 kW, and then only for a few minutes. My MG is just over two years old, had its last service in Sept 21. During that service they did no...
  8. Zoomy

    EU4 BMS

    There's a new ZS BMS out with a build number ending in "EU4". This replaces the A01/EU1 BMS, which resolved all those balancing issues. Has anyone had it and were you made aware of the differences over the previous release?
    • Zoomy
    • Thread
    • battery management system bms mg zs ev
    • Replies: 4
    • Forum: MG ZS EV Forum
  9. Davemac278

    BMS and Infotainment versions

    Had my first service yesterday. Free from MG due to faulty BMS fix in January 21. I told service desk that I wanted the infotainment update done and said I thought it was SA0020. Took car in at 8.30am, took new long range demo car out and waited on update on when my car would be ready. Thought...
  10. R

    To update or not (BMS)

    New MG ZS EV first edition owner here. My ZS EV build november 2020, seems to be on an older BMS. I asked for all latest updates on delivery, but I have no KERS when fully charged and the battery has 454voltage when full. So guess they said yes, but did nothing. (Shows 268km on E with HVAC off...
    • Royals
    • Thread
    • battery management system bms mg zs ev update
    • Replies: 17
    • Forum: MG ZS EV Forum
  11. BruceT

    BMS- Battery balancing etc

    I'm sorry, I know this has been asked before, I was reading it, now I can't find it. My battery says this....... As you can see 98 miles, the fuel level gauge thingy is reading 5 bars out of 8. should my voltage be showing 411v? Seems really low, I mean I wouldn't want to put my fingers in...
    • BruceT
    • Thread
    • battery battery management system bms mg zs ev
    • Replies: 16
    • Forum: MG ZS EV Forum
  12. Delboy102000

    Vin Numbers for Faulty BMS update identification

    Does anyone know where to access the vin number range of ZS Ev cars suspected of having the faulty patch installed. My full charge voltage on a 2021 car is 455 volts and the range seems to drop of fast even when driven at a steady 65 mile per hour. The other day I started a journey with a...
  13. Aussi55

    BMS Version is there a better one available

    Hi, Having had the chance to do my first full charge and equilisation I was wondering if there is a better version available. The HV voltage is 449v with the GOM range showing 148 miles in normal mode regen 3, heating switched off. Car is August 2020 and has had one service. I don't get...
  14. Headgas1

    BMS update ?

    I read several threads on here talking about the cars software/ bms updates Comfort 2 etc…. How can you tell what version the car is running on and do they update the car when you service it or do you have to pay separately or is it better to just be blissfully unaware ??
    • Headgas1
    • Thread
    • battery management system bms mg zs ev update
    • Replies: 16
    • Forum: MG ZS EV Forum
  15. T

    March 2021 registered ZS EV but old BMS?

    This one is a bit odd. When buying a March 2021- registered ZS EV very recently from a non-MG dealer I saw that the temperature was showing in the infotainment screen and the remaining miles in the dash and without checking further thought it must have the latest BMS update. However after my...
    • Terry2
    • Thread
    • battery management system bms mg zs ev zs ev
    • Replies: 3
    • Forum: MG ZS EV Forum
  16. johanhoeke

    any OVMS news to share? also, BMS 092660R12 supported?

    greetings from the Netherlands, Considering getting OVMS. I've just watched the march 29th podcast about OVMS for the ZS EV where there was a mention of new features on the verge of being released and was wondering if there's been progress made? I've checked MG EV — Open Vehicles documentation...
  17. S

    New software (BMS?) on 4th September

    Took the car in for first service on Saturday at Panda MG in Swansea. The bloke did all the checks and said there's a new software coming out on 4th September and I am welcome to book the car in after that to do the update. As far I can tell, no updates was made so the car is in the same state...
    • simon
    • Thread
    • battery management system bms mg zs ev software
    • Replies: 8
    • Forum: MG ZS EV Forum
  18. R

    MG / dealer not recognising BMS update as required

    We have an early BMS version (1125600R15) which has caused our car to fail to start after charging. It's been to the original dealer for an update but they did not update the BMS and instead updated the infotainment system. We've not been able to get a reason for this from the original dealer...
  19. D

    BMS updates again

    Just had my BMS updated. It was 1125600R15 The BMS version is now 0210622EU1 I have read that the BMS version should be 1230621A01 (the January update) I have also read that the updates are in the following order - 1125600R15, 016600R17, 0603610R28, 1016620R40 (supposedly the bad BMS)...
    • DrTom
    • Thread
    • battery management system bms mg zs ev
    • Replies: 12
    • Forum: MG ZS EV Forum
  20. J

    Sorry BMS again!

    I cannot get my head around what version my pre reg Feb 2021 Zs EV should have? I was assured by the dealer that it had the latest software update when bought it in early June 2021. I have just discovered that my battery when fully charged at home has a voltage of 456v is this the version I...
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