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Getting 320Mile charge Constently anyone Else?

Discussion in 'Model 3' started by yossi, Jun 6, 2018.

  1. yossi

    yossi Member

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    i think the new firmware by mistake opend up more battery left it with 230m and after
    18 hours had 255m i think i can get 340mile charge
    ill keep you posted the next time i am topping it
     
  2. S3XY

    S3XY Active Member

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    Technically this is not while ON a road trip but FOR a roadtrip I would add 3. At home before you leave.
     
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  3. apacheguy

    apacheguy S Sig #255

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    Find this hard to believe. Tesla’s reserve is on the bottom end, not the top. Only way to know for sure is measure the cell voltages at 100%. Supercharge voltage would also be a good indicator.
     
  4. run-the-joules

    run-the-joules Active Member

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    Charged to 100% overnight, remembered to check after a few miles of driving. Showed 312 at that point.
     
  5. novox77

    novox77 1.21 Gigawatts

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    There are reserves at both ends for all Lithium batteries with charge controllers. The the upper limit is constrained by voltage; i.e. when it reaches a programmed voltage, it shuts off charging. This is a critical safety feature to prevent thermal runaway (leading to batteries catching on fire). It is this higher voltage that also encourages dendrite growth that reduces battery capacity over time. So a charge controller set to quit at a slightly lower voltage will automatically leave a bit of reserve at the top while making it harder for the user to stress the battery.
     
    • Informative x 1
  6. timk225

    timk225 Active Member

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    I fully charged my 3 last night until it shut off, and it was at 310 miles. A couple weeks ago on an almost full charge, it was 311. Then I drove it 30 miles so it wouldn't be sitting at 100%.

    How do you change miles to % on a 3? I haven't seen how to do that.

    I have never reset my Trip B odometer since it was brand new, and it's showing right about 230 watt hours / mile as its long term average. I'm not afraid to hit the electric pedal in my 3 and GO!!! Got to represent Teslas on the highway by blowing past people in the fast lane!!!
     
  7. SageBrush

    SageBrush 2020: Drain the Sewer

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    Rated miles divided by 310.5

    That should get you to within ~ 1/600 accuracy, much better than any old fashioned percent monitor.
     
  8. run-the-joules

    run-the-joules Active Member

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    Settings -> display -> advanced (the thing in the upper right) -> change from range to energy.
     
  9. Emmexx1

    Emmexx1 Member

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    In the display settings menu:
    20180608_191854.jpg
     
    • Helpful x 1
  10. apacheguy

    apacheguy S Sig #255

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    Ok, technically, yes you could overcharge above 4.2 V. But this is not considered a “buffer” as the state of charge is truly 100% at 4.20 V. A top buffer would be if Tesla only charged a 4.2 V cell to 4.15 V or some such and I highly doubt that’s the case in the Model 3.
     
  11. SageBrush

    SageBrush 2020: Drain the Sewer

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    Tesla most certainly leaves room at the top for battery longevity. I think it is 5% for the 18650 form factor and would presumably be the same for the batteries in the Model 3.

    I"m not positive, but I think the maximum voltage is set according to the Nernst equation.
     
  12. apacheguy

    apacheguy S Sig #255

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    Guys. I think we are getting confused over the term “buffer”.

    When I say buffer I mean the bricking buffer that is displayed in diagnostic mode. For example, an 85 kWh Model S displayes a bricking buffer of 4.0 kWh. There is no equivalent top “buffer” set in the firmware. The only thing limiting the cells is the maximum charge voltage which is 4.20 V for the cells that Tesla’s use. I do not consider this a buffer, this is an operational design limit of the cells set by Panasonic.
     
  13. davedavedave

    davedavedave Member

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    Hmmm... are you using TeslaFi or any other logging app by any chance? That could explain it. If not, I would call the service center!
     
  14. dswansonsb

    dswansonsb Member

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    Not using Tesla Fi.
     
  15. davedavedave

    davedavedave Member

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    Interesting. I tried a “trip” charge today for the first time, and though I had to leave, it said that I had 312 miles “in the tank”, but also that it would take another 50 minutes to full charge.

    Next time I’ll see if I can top it off to completion before setting out on the road.
     
  16. jamnmon66

    jamnmon66 Member

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    Try depleting the battery as low as you dare (I went to about 6 miles left) and then charge it to 100%. That should recalibrate. Mine went from 311 to 316 when I did that. Just don't do it very often.
     
    • Helpful x 1

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