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. 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...
  2. notdodgy

    Battery management system

    Garden strimmer battery has failed. Duff BMS? Lot of electronics for a 5 cell battery...
  3. 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...
  4. P

    Free service if impacted by buggy BMS?

    Hi. I had read some where that those affected by the buggy BMS were entitled to a free first service. Does anyone know if this is official or if there is anything I can point dealer to to get this? Thanks.
  5. Stuart Wright

    Everything you need to know about BMS & voltage balancing

    Later today, @MilesperkWh and I are making a video to explain what BMS is and to address the concerns of ZS EV owners regarding potentially unbalanced batteries. I will ask Miles a series of questions to answer, the purpose being to create a definitive video on the subject which addresses all...
  6. Sparqx

    BMS Update 4 and Comfort Pack 2 Update

    Hi Everyone, Just had my car returned to me after a service and the BMS Update 4 (15/1/2021) & Comfort Pack 2 Update (Mid 2020). I have a Rolec charger and my previous experience when charging was : - Plug 7KW charger in, lock the doors, charger starts but delivers a 'trickle' charge until the...
  7. Peter WA

    BMS Versions Australia

    After a bit of a wait mine and a friend's ZS EV are ready to be delivered by a dealer in Victoria tomorrow. Ordered one month apart, they became available at the same time. Both have a production date of November 1st 2020, compliance plate date Feb / 2021. Today we tried to make sure that all...
  8. Electrifried

    Latest BMS update (Jan2021)

    Does anyone know how long the car remains live to allow a delayed charge from a Smart Home charger? I have had this update done because the previous update in Nov 2020 did not fix the issue I had with delayed charging. In Nov I at first thought the problem was fixed but the car only accepted a...
  9. M

    BMS January update

    I find the forums extremely useful,e I am booked in for the Jan BMS shortly. Is it best not to balance before this is done
  10. M

    Is it better not to balance until you've had the Jan BMS update?

    Is it better not to balance until you've had the Jan BMS update
  11. Mark Holmes

    Recent BMS update

    I purchased my car in March 20 and have the comfort 2 software added in May, but since then the car hasn’t been back to the dealer for any updates. My first service is due next week and I’m concerned that the new BMS update will still cause me problems, okay my car shouldn’t have any balancing...
  12. P

    Data/Readings post BMS update.

    My car was purchased on October and so has always had the buggy BMS software last Friday 29th Jan I had the update. I've been as frequently as possible dischaging battery to around 90% and then applying a full balancing charge - which takes around 7-8 hours all in. I'm trying to be as...
  13. mystreet

    BMS Update - Should I?

    My BMS is v1 straight out of the factory, purchased the car 3rd November 2020. Whilst sitting at Sainburys charging with the doors locked. Getting 455v, 160m in E. What I want to be able to do is charge it with the doors unlocked, and in the summer with them open. My question is do I get the...
  14. Mclean93

    New bms update

    Over the last couple of months my mileage range has decreased massively. Took car i to the garage today and they have done another bms update. They have just rang me to say the update is all done however the latest update comes with a "STIPULATION" which they will go through when i get there...
  15. Mg5man

    Charge whilst unlocked without bms update

    Picked up a new zs ev early january. Car 100% not had bms update but had comfort 2 update. Bms update was pulled before I bought my car. Dealer definitely didnt do a bms update. I can charge whilst unlocked, charges to 456 volts and today I managed 152 miles steady driving part motorway with...
  16. T

    BMS update- feedback from MG

    Sent to dealer Please confirm how long it is expected to take before the battery equalises properly (after 15 Jan BMS update), and if there are any scenarios that can be implemented to facilitate reaching this point quicker. As you can imagine, I am still suffering with range issues. Although...
  17. D

    BMS and the Comfort Update

    Hi All, I contacted my local dealer yesterday to book the car in for the BMS and HV Fuse update. I was told that these were part of the comfort update and it would be chargeable as per. However I had the comfort update applied last July when I bought the car. As far as I am aware, at least as...
  18. P

    Buggy BMS software

    Hi. I've been a little concerned with my car range ever since I got it (Oct 2020). Today I had a trip from 100% to empty (flashing battery and range display at "---") and only got 80 miles. However I was driving carefully and had 2.9 m/kWh which should have given a 122 mile range with 42kw...
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