TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC
Start a Discussionhttps://teslamotorsclub.com/tmc/tags/

Has anybody with a Model S or X 75 kWh battery ever seen a charging rate of more than 100 kW?

Discussion in 'Model S: Battery & Charging' started by [email protected] Bargain, Oct 11, 2017.

  1. Tesl@ Bargain

    Joined:
    Aug 15, 2016
    Messages:
    24
    Location:
    Central Europe
    #1 [email protected] Bargain, Oct 11, 2017
    Last edited: Oct 11, 2017
    Ours reaches a max of exactly 100 kW at some point below 50% SOC, but only for a second or so.

    To be clear, this is not about any other battery size, has nothing to do with a specific SuC station, SOC and outside or battery pack temperature. It is about the determination of the max rate the 75 kWh battery pack can be charged.

    My assumption is, that the 75 kWh battery pack simply can not be charged at a higher rate than 100 kW, limited by the BMS.

    For reference, the part number of the battery pack in our Model S is 1088794-00-A (which in contrast to an older article on Teslarati is indeed the latest 75 kWh battery pack version).
     
  2. SPPGA

    SPPGA New Member

    Joined:
    Sep 29, 2016
    Messages:
    1
    Location:
    Dania, FL
    I have a 2017 MS 75 D. Have been using mostly Superchargers in South Florida to charge since I received the car in April. Most days the air temperature at the Supercharger is greater than 30* C. I have NEVER seen a charging power greater than 96 kW even when the battery is nearly empty or when charging in cooler temperatures later at night. Very frustrating as I have gone back and forth with Tesla service on this since I purchased the car. Most times I am charging below 75 kW and charging seems to take a needlessly long amount of time, usually at least one hour no matter how full or empty the battery is. The only action that seems to improve charging time is charging on a Level 2 charger before Supercharging.
     
  3. Tesomega

    Tesomega Member

    Joined:
    Sep 28, 2017
    Messages:
    5
    Location:
    Pittsburg, CA
    I have a 2017 MS 100D in CA. I have done only charging at 4 different SCs along I-5. My charge rate has never been more than 78kW. The worst I have seen is at Dublin, CA @ 28kW (I was told this specific SC has a know issue as it is ALWAYS fully occupied)
     
    • Like x 1
  4. Ski_

    Ski_ Enthusiast

    Joined:
    Aug 16, 2017
    Messages:
    72
    Location:
    Bay Area
    Yes. On two newer different MS 75d loaners. Both were on i5. It only seems to occur when the battery is on the low end and in the evening when it’s cooler out. (Not unusual).
     
  5. ucmndd

    ucmndd Member

    Joined:
    Mar 10, 2016
    Messages:
    410
    Location:
    California
    I have a software locked 60, max I recall seeing is 98kw. These packs don't charge any higher.
     
  6. Ski_

    Ski_ Enthusiast

    Joined:
    Aug 16, 2017
    Messages:
    72
    Location:
    Bay Area
    Dublin is horrible... I have have fast charge rates there a few times— but it’s so rare... Sadly under 60kW seems the average...
     
  7. Tesl@ Bargain

    Joined:
    Aug 15, 2016
    Messages:
    24
    Location:
    Central Europe
    96 kW would seem about right, ours stays between 90 and 100 kW for the most part till it starts dropping at higher SOC. Though I can not see how AC charging before Supercharging can improve the charging rate.

    Sorry, different problem, this is about determining the max rate the 75 kWh battery pack can be charged with. If you have a 100 kWh batter pack it's clearly the SOC / temp / SuC limiting your charging rate.

    How high did the charging rate go? I have watched the max charging rate of our Model S 75 (formerly software-limited S 60) closely over the last year, and we Supercharged under various conditions (temp, SOC, always alone one a A/B SuC pair or alone at the whole SuC station) but never exceeded those 100 kW, which really gets just touched long enough to be able to make a photo but then drops below 100 kW immediately again.

    That's the assumption, though there have been (unconfirmed) reports from others with the claim of having seen a higher rate, which puzzles me.
     
  8. Tesl@ Bargain

    Joined:
    Aug 15, 2016
    Messages:
    24
    Location:
    Central Europe
    So I know now that there is a difference in battery pack voltage. The 75 kWh battery pack has 350VDC, however the 85/90/100 kWh battery packs have 400VDC, which explains the lower charging rate for the 75 kWh pack.

    But the question still remains: What's the max rate the 75 kWh can be charged with?

    If everything is OK with our S 75, it should be 100 kW, but that still leaves some others reporting of having seen a higher charging rate on theirs, which doesn't make sense.
     
  9. evster

    evster Member

    Joined:
    Aug 15, 2017
    Messages:
    59
    Location:
    Europe
    If they have a 75kWh-pack they don't tell the truth if they have seen 100+ kW charging speeds. It just ain't gonna happen.
    However, the older 70D-vehicles came with a 400VDC-pack so if someone with that config say that they have seen 110kWh+ charge speeds that is perfectly normal. Also if you get repons from any of the few 75D owners that got their car delivered with software limited 85kWh battery (few EU-cars produced april-may or there about). Those "75D" will report same charging speeds like the 85-owners because it is the same (or similar) pack with 400VDC.
     
  10. BerTX

    BerTX Active Member

    Joined:
    May 2, 2014
    Messages:
    1,779
    Location:
    Texas/Washington
    29k miles and 80+ Supercharger visits. 96 kW max.
     
    • Like x 1
  11. BigD0g

    BigD0g Member

    Joined:
    Jan 12, 2017
    Messages:
    578
    Location:
    VA
    Yes, i've seen 105 kW, but not for very long like 10min or so when I was @9% SOC.
     
  12. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,506
    Location:
    Chicago, IL
    I hit 100kw briefly the other week. Otherwise I cap out at around 96kw.
     
  13. SomeJoe7777

    SomeJoe7777 Marginally-Known Member

    Joined:
    Mar 28, 2015
    Messages:
    961
    Location:
    Houston, TX
    The superchargers can put out a maximum current of 350A. For a 75 kWh battery to take 350A, it has to be very low in the charge range, so the terminal voltage of the pack will be well below the nominal 350 Vdc, somewhere in the 275-280 Vdc range.

    280 Vdc * 350 A = 98 kW should be the max you will see.

    For 85/90/100 kWh batteries, they are 400 Vdc nominal, so low in the charge range, they'll be around 330 Vdc and can take 350 A.

    330 Vdc * 350 A = 116 kW which is typical on those batteries.
     
    • Informative x 4
    • Helpful x 1
    • Like x 1
  14. Maximapolak

    Maximapolak Member

    Joined:
    Nov 13, 2016
    Messages:
    469
    Location:
    North NJ / SouthCentral PA
    Max I've seen on my 60D is 96kW but that was once at the Shirley, NY SuperCharger.N
     
  15. Max*

    Max* Not Banned

    Joined:
    Apr 8, 2015
    Messages:
    6,292
    Location:
    NoVa
    Then how come my gen 1 70D battery can hit 113-115kw?

    Screenshot_20170520-235943.png
     
  16. apacheguy

    apacheguy S Sig #255

    Joined:
    Oct 21, 2012
    Messages:
    4,472
    Location:
    So Cal
    Actually the max is higher than 360 A.



    Different cell characteristics.
     
  17. Tommi

    Tommi New Member

    Joined:
    Aug 8, 2015
    Messages:
    2
    Location:
    Finland
    IMG_1966.JPG I had a test drive car about a month ago, a 75D. It might have had BTX8 battery, didn't check though. It charged with 116kW at about 34% SOC when I started charging. The VIN was 195xxx.
     
  18. apacheguy

    apacheguy S Sig #255

    Joined:
    Oct 21, 2012
    Messages:
    4,472
    Location:
    So Cal
    @Tommi - very likely a software locked 85 kWh.
     
    • Like x 1
  19. SomeJoe7777

    SomeJoe7777 Marginally-Known Member

    Joined:
    Mar 28, 2015
    Messages:
    961
    Location:
    Houston, TX
    Someone earlier in the thread mentioned that some 70D models have 400V packs. I don't know if this is the case, but it would appear to make sense given that you're getting 116 kW.

    If you have access to the CAN bus to read BMS frames, you should be able to tell from the pack voltages whether you have a 350V or 400V pack.
     
  20. MorrisonHiker

    MorrisonHiker S 90D 2017.34 2448cfc

    Joined:
    Mar 8, 2015
    Messages:
    3,266
    Location:
    Colorado
    @Max* could just look at the sticker on his battery and see if it says 350V or 400V. :)
     
    • Like x 1

Share This Page