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Model 3 LR Supercharging

Discussion in 'Model 3: Battery & Charging' started by SageBrush, Jun 15, 2018.

  1. SageBrush

    SageBrush 2018: Drain the Sewer

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    Messages:
    6,369
    Location:
    Colorado
    #1 SageBrush, Jun 15, 2018
    Last edited: Jun 15, 2018
    This data is mostly known by now, but results vary by battery temperature and individual Supercharger so here is Albuquerque, NM at 8 am, after a 13 mile drive. I arrived with 76 rated miles and left with 248-ish. I had two main questions in mind: kW at any particular SoC, and average charge rate for a 20% - 80% charge session. The latter charge interval is of more than passing interest since it approximates ideal Supercharger hopping for this car presuming the charging intervals are about 180 miles.

    Method:
    I grabbed smartphone captures periodically
    Data dumped into Google Sheets

    Screenshot 2018-06-15 at 10.29.09 AM.png

    Summary:
    114 kW from < 40% SoC
    Approximately linear drop in kW from 40% SoC down to 50 kW at 80% SoC
    The graph approximates a trapezoid, giving an easy way to estimate average kW for this SoC charge interval:
    (2*114 + 4*0.5 * (114+50)) / 6 = 92.6 kW


    Screenshot_20180615-085742.png Screenshot_20180615-090304.png Screenshot_20180615-091227.png Screenshot_20180615-091406.png

    (5 photos are missing. I'll add them when the system is more cooperative)
     
    • Informative x 3
  2. Electroman

    Electroman Active Member

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    TX
    I havent seen your sheet yet, but the one number everyone is interested in is - how long did it take to charge from 76 to 248 miles ?
     
    • Like x 1
  3. SageBrush

    SageBrush 2018: Drain the Sewer

    Joined:
    May 7, 2015
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    Location:
    Colorado
    I didn't pay attention, but it is a simple calculation to closely estimate:

    Since 1 kWh = 4 rated miles
    I added 248 -76 = 172 miles
    Thus 172/4 = 43 kWh put in battery

    At an average 92.6 kW,
    43 kWh / 92.6 kW = 0.46 hours = 28 minutes
     
    • Like x 1
  4. David99

    David99 Active Member

    Joined:
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    Brea, Orange County
    40 kWh is aprox the average I need on road trips to go from Supercharger to Supercharger in a Model S. The 3 will use less energy of course.
     

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