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98% for max charge?

Discussion in 'Model S: Battery & Charging' started by Alysashley79, Jan 6, 2020.

  1. Alysashley79

    Alysashley79 Active Member

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    I’ve tried to max charge my car three times every single time it stops at 98% and says charge complete. When I try to get it going again it won’t. Has anyone else had this problem?
     
  2. boaterva

    boaterva Supporting Member

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    Tried to charge my X to ‘full’ for long trips and get to 99. Suspect it’s just a BMS calibration issue and doesn’t matter. If it thinks it’s full, it is.
     
    • Like x 1
  3. beatle

    beatle Member

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    My guess is that there is at least one module that is out of balance with the others and may be at a lower voltage, preventing you from hitting 100%. When charging, energy is distributed to all modules equally, and if the others are full, it will stop charging to prevent those from being overcharged. It would be worth a call to Tesla to ensure the pack is not failing.
     
  4. Electric700

    Electric700 Active Member

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    That's why they have battery balancing, which is supposed to start any time the charge level goes above 93%, though they may be doing that at any charge state with the latest update. Alysashley79, you might want to check with Tesla through the app service request feature to make sure battery balancing is occurring, and ask them to perform additional diagnostics.

    I'm curious to know what you find out!
     
  5. Wooloomooloo

    Wooloomooloo Member

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    Has it always done that, or just started doing that recently? Do you get the full rated miles or is it off?

    I agree with the other comments, it's probably worth getting a diagnostic done.
     
  6. Alysashley79

    Alysashley79 Active Member

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    It just started doing it recently. I’ve always been able to charge to 100%.
    I thought the same thing maybe it’s just the computer is off but my miles are around 240 to 241 seen as high as 243. But this is only going to 234. Seems like a huge drop in a month so I don’t think it’s depredation.
    I sent an email to service asking them to run a diag. I didn’t see a place in the app to request that?
     
  7. Wooloomooloo

    Wooloomooloo Member

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    You can always schedule the service under "charging" - in the description you can be more precise. Generally they will call you for clarification anyway.
     
  8. ddawson

    ddawson Member

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    Same here, happened a update or two ago.
     
  9. random155

    random155 Member

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    I cant get passed 97%. I inquired about it and assume thats it due to bad charging habits which are preventing the battery pack to balance correctly. Im very sporadic with my charging (percentage, home charge, supercharge). I'm being more consistent with charging and will see what happens over the next few weeks. If I still can't get passed 97% I'll be making an appointment.

    This also happened recently... I've charged to 100% several times over the summer.
     
  10. Alysashley79

    Alysashley79 Active Member

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    I’ve never had this problem before. This is also my second Tesla and never seen it. So it’s either modules going bad or...it’s a firmware issue but I’d think that we’d be seeing it more and more across the board.

    my car is charged to 90% daily and sometimes higher if it’s needed. With winter and snow at our home it’s been needed to go above 90. But again this is a habit we’ve always had.
     
  11. Lasttoy

    Lasttoy Active Member

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    Mine did that this weekend, it wouldn't go to 100, I was on a trip.
     
  12. mrneef

    mrneef Member

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    Bring your car in they will replace the pack. Mine went in in October for that. Replaced my 85kwh with a 90kwh, but now since 12/31 it is in again to get yet another replacement.
     
  13. ucmndd

    ucmndd Well-Known Member

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    Are you performing relatively deep discharges between the attempts to charge to 100%?

    I’ve had this happen a few times over the past 3 years, usually after not charging to 100% for an extended period. A few cycles down to ~20% and back up fixed it every time.
     
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    • Like x 1
  14. ddawson

    ddawson Member

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    I charge to 100% once a month. I discharge to 15% once a week.

    Otherwise it's 90% at the start of the day and 30% when I get home 5 days a week. Started happening about 2 patches ago.
     
  15. Alysashley79

    Alysashley79 Active Member

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    Like the above I also get down to a low soc several times a week. In fact I was down to 18% two days ago.
     
  16. ddawson

    ddawson Member

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    Let me know if your going to make a service request. I'm not sure if this is part of the capping or not. I'm on version 2019.40.2.1 and I get 4.15 to 4.16V on a 98% charge.
     
  17. random155

    random155 Member

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    I had a mobile tech come out today for a completely unrelated issue, and I brought up my cars inability to charge to 100%. I mentioned battery module/pack failure and he said that it was very unlikely since I don't have any lasting error codes on my screen. He said that he will have Tesla run a remote diag. to see if there are any issues. I did have error messages about a month ago after a supercharing session that said to bring my car into service and it may not re-start. They analyzed the error and could not find any problems. This happened twice in November, and hasnt happened since then.
     
  18. mrneef

    mrneef Member

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    Keep a log of date and time with photos of your dash anytime you have issues. And keep complaining. It took me 5 complaints
     
  19. Alysashley79

    Alysashley79 Active Member

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    They’re running remote diagnostics on my car and said They’d have an answer by the end of the week.
     
  20. random155

    random155 Member

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    Sounds good. Once I hear I’ll also post results.
     

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