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. Fishettibean

    Poll: Dec19->Jan21 BMS Voltage

    Please only vote on this poll if you had the old BMS which did not allow charging when unlocked (aka December19 BMS) and have recently has the new bms (from 18th January 2021, not before this date!). If you had an BMS update between August 2020 and 17 January 2021, you had an old version of BMS...
  2. Paulie68

    25/01/21: Just had latest BMS software. Observations...

    So I had the first service done today. The garage also applied the latest BMS update along with the HV fuse protection update. My car hasn't had any previous BMS updates after the comfort 2 earlier this year, so this may, or may not, be relevant. Anyway, unlike the previous BMS updates...
  3. Fishettibean

    Failed charge controler during BMS update. (Retitled)

    Thanks cardiff for ducking up the BMS. Not charging when unlocked, taking 5 hours to equalise and battery voltage is off (447v). The service was done on Wednesday. This is the dealership that gave the words "we dont do the HV update unless requested" when asked by a mandatory update....
  4. M

    New BMS update

    I received my MG Zs ev at the end of November and have done 414 miles in it. Yesterday I charged it up and waited for it to Balance. After 4 hours of balancing I have to disconnect to go out. The voltage reads 447 volts and the range reads 139 normal and154 economy. Ambient temperature is 5...
  5. C

    BMS updates and warranty

    Does anybody know whether it's compulsory to have the BMS updates to keep the warranty valid? My car had the August updates when I got it, and I'm happy with the car, it can charge up to 455v, I only ever charge it up to 100% every couple of months, most of the time I only charge to 80% to try...
  6. Mg5man

    Bms update advice needed

    Today I've just ordered a new Mg ZS EV from Chorley MG. Should I be asking them not to implement the bms update from the summer due to voltage loss on the hv battery as I have heard on the podcast it affects range. Your advice is greatly appreciated.
  7. M

    BMS update-Computer says “No”

    Hi all, I reconfirmed my 1st service for next week with my supplying dealer and double checked the updates they are going to perform. As per my original booking telephone call the service department stated that my VIN does not show that I’m eligible for the BMS (SA015) update. To be honest I’m...
  8. S

    BMS Update not possible

    Good evening all, We collected my Dad's MG ZS EV on Saturday from Cairnryan Possible MG ZS EV Newbie | MGEVs Community I did my due diligence before purchasing to ensure all relevant updates would be applied such as; 'Comfort 2 Update' (apparently cars coming through now have this update...
  9. Mike

    BMS mid 2020 update

    Hi all, ive just uploaded a video about the latest BMS update
  10. N

    BMS Update again

    Back to the BMS update again. I have my MG now about 3 weeks and timed charging was not an option, either using my new Rolec 7Kw charger or the granny cable. Yesterday the car was in for updates, I asked for BMS, Comfort 2 and HV fuse. The Comfort update is obviously in - makes quite a...
  11. Tango130

    My Red ZS Exclusive & some useful info re BMS HVB Fuse Updates

    1st EV, I currently drive a Porsche 924S on a daily basis(with regular periods on axle stands refurbishing components as I go) but need a more reliable car to pickup/drop off my little lad at nursery etc. Zappi 2 charger arrived yesterday, being installed today. Off to Brindley MG Wolverhampton...
  12. K

    ZS EV Delayed Charging Test. Successful after BMS system software update to latest.

    Hi Folks, I know some have the appropriate updated software and are using delayed Charging successfully. I am writing to those who have not. This is to confirm that delayed Charging is possible on the ZS EV if you have the appropriate software update. No need for trickle Charging or any...
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