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Reduced supercharge speed on 100D?

Discussion in 'Model S: Battery & Charging' started by Testwa, Jun 17, 2018.

  1. Testwa

    Testwa Member

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    The reduced supercharge speed on 90D's has been discussed for quite a while.
    Is anyone aware of 100D is affected as well? The 100D is less than 2 years on the market so probably not too many cars out there with heavy supercharging like 200 times.
    The 90D with 86kWh battery has a high charging rate of 1,4C while supercharging at 120kW (120/86=1,4). Once the 90D is reduced to ~95kW charging, the factor is reduced to ~1,1C (95/86). So now the 100D with 102kWh battery pack would not even hit 1,2C at a 120kW supercharger (120/102<1,2). Meaning the 100D has almost the "slow" charging rate of a reduced 90D. And if the 100D would be also reduced to 1,1C the difference to 1,2C would not be that big and noticeable like on the 90D from 1,4C to 1,1C.
    That would be just my theory. Any experience?
     
  2. ItsNotAboutTheMoney

    ItsNotAboutTheMoney Well-Known Member

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    No. Just think of the 90D as a failed cell design that Tesla abandoned. They made changes to the 90D Supercharging to protect them as much as possible from degradation.

    Doesn't affect the 100Ds.
     
    • Informative x 3
  3. No2DinosaurFuel

    No2DinosaurFuel Active Member

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    Your analysis is spot on. If you take the 75D, we see similar effect. It starts out close to 100kw charging and then after heavy usage, tapers to 89kw max which is around 1.2C. We dont see as many complain because the 75 are use to the slow charging. If tesla had the 100D when my 90D was around with free unlimited supercharging I would've gone with that to be safe.

    But keep in mind once supercharge V3 comes out then I suspect the 100D might experience similar situation as the 90D if trsla allow uncapped supercharging. However I suspect tesla would be smart and keep the cap to be 120Kw as this is plenty fast for the 1st gen supercharging.
     
  4. Naonak

    Naonak Member

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    Yep, this seems like the right answers to me. I wish I had known about the 90 packs when I bought my car. I would have opted for the 85s. Fortunately, when I bought a replacement for my wifes P85, I went with the P85D. She basically gets the same range I do and no throttling. The 90 packs are a pig-in-a-poke.
     
  5. lymex2018

    lymex2018 Member

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    The max charge rate of normal 18650 cells seldom exceed 1C.
    Sony US18650NC1, capacity 2.9Ah, standard charge 1A?, max. charge current 2A
    Sony US18650VC7, capacity 3.5Ah, charge current 1A, max. charge current 2A?
    Panasonic NCR18650BD, capacity 3.2Ah, standard charge 0.9A, max. charge current 1.5A
    Sanyo/Pana NCR18650GA, capacity 3.5Ah, standard charge 1.675A, max. charge current 3.35A?

    The cells in a 100D are customer-made:
    Panasonic Tesla 100D, capacity 3.4Ah, standard charge 2A?, max. charge current 4A?

    I've seen a charge current of 320A on my 100D which is 3.72A per cell. If the max charge current of 90D is the same, then the cell charge current would be 3.72*86/74=4.32A, bigger than any NCA 18650 cells I know. This may explain why Tesla reduce supercharge speed, and also explain why 90D may degrade more than others.
     
    • Informative x 1

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