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Manually enable battery cooling

Discussion in 'Model S: Battery & Charging' started by No2DinosaurFuel, Sep 26, 2016.

  1. No2DinosaurFuel

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    I am not sure if this is covered but is there a way to manually turn on the battery cooling? It will be extra hot the next few days here in SD and I would like to protect my battery.

    I know tesla says they have that all covered autonomously but I was wondering if there is a way to do it manually because we know lithium battery will last longer if they are in cooler temperature.
     
  2. jeffro01

    jeffro01 Active Member

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    Not that I'm aware of... Besides, Tesla is right, they have it all covered and you shouldn't need to worry at all about it. :)

    Jeff
     
  3. ICETOO

    ICETOO Member

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    What is interesting is that according to Tesla's posted "Range Per Charge", battery efficiency continues to improve as outside temperature increases, all the way up to 110 degrees.
     
  4. jeffro01

    jeffro01 Active Member

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    That's due to how lithium batteries operate, the hotter they are (up to a limit) the "easier" the energy flows... For those of you who are more technical, yes I realize that's not the best way to explain it...

    Jeff
     
  5. Canuck

    Canuck Active Member

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    While colder temperatures generally don't harm lithium ion batteries, if you cool it too much, and then charge it, including by way of regen, it can cause faster degradation. That's why Tesla limits regen in colder temperatures until the battery warms up. So it's best to leave it to the BMS to determine proper temperatures since it accounts for all of this.
     
  6. ecarfan

    ecarfan Well-Known Member

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    There is no "manual" user control over battery temp. The Tesla BMS (Battery Management System) is constantly monitoring battery temp and heating or cooling it as it sees fit. Not something you need to worry about except remember "A happy Tesla is a plugged in Tesla" when the car is not being driven.
     
  7. Rocky_H

    Rocky_H Member

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    While other people addressed the answer (Don't worry about it.), I'm going to address the question. San Diego is a coastal city. It just DOESN'T get really hot. I just looked up the high temperatures for San Diego for the next several days, and they are 88, 80, 80, 77, 74, etc. Anything less than 100 doesn't matter in the slightest. So don't worry--be happy. ;)
     
  8. No2DinosaurFuel

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    Well my point is really for when the car is parked in the sun. I know I won't be driving it so no regen or what not. Moreover there is a heat wave going on so I know it is going to be hot. Finally I don't really care about remaining energy because I know I have enough capacity to make it home to charge. Lithium like cool temperature when idling.

    Yes I agree it is nice to have it automated but tesla should give power users the ability to manually control it.
     
  9. No2DinosaurFuel

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    It is hot if you live inner part of san Diego. What you are looking at is san Diego city. There is a lot of county in hotter regions of san Diego county.
     
  10. BigMskiman

    BigMskiman Member

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    Always "plugged-in" is opposite of what I do, Have HPWC at home but use it infrequently. I live and work near the factory & Dublin, and DC charge mostly before lunch hour when below 10%. So is this "all-the-way down & up" approach not making a happy battery? AC or DC, it's you're approach that I'm challenging.
     
  11. trils0n

    trils0n 2013 P85

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    Deeper depth of discharge (letting it run low and then refilling) is generally harder on the battery than topping up every night with you HPWC.
     
  12. whitecotton

    whitecotton Member

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    Remember range mode was found to divert battery cooling as long as possible. Up to 50 Celsius if I remember correctly. This is the main way they get that stretch the energy out as long as possible.
     
  13. BigMskiman

    BigMskiman Member

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    Yer right, thanks

    From the manual I think:
    "Model S has one of the most sophisticated
    battery systems in the world. The most
    important way to preserve the Battery is to
    LEAVE YOUR MODEL S PLUGGED IN
    When you are not using it."
     
  14. Boatguy

    Boatguy Member

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    Not to worry, Tesla will cool the battery. I've seen large "vampire" losses when parking my car in the sun on a hot day and came back to find puddles under my car from the condensation on the cooling system. If you have the pano roof, opening it to the vent setting will help. And I think the windshield reflectors are also helpful.

    But no manual setting that I know of, Tesla just cranks up the venting and AC as needed.
     
  15. apacheguy

    apacheguy Sig 255, VIN 320

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    My car never activates the chiller while parked. Needs to get above 50 C in order for that circuit to trip which is really difficult to achieve. Only while supercharging in hot weather.
     
  16. mhan00

    mhan00 Member

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    Unmmmmm, no, they shouldn't. Tesla actually knows the best way to manage the batteries, users would just be guessing.
     
    • Helpful x 1
  17. Lloyd

    Lloyd Active Member

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    With this in mind, when I am using range mode, I turn it off about 5 to 10 miles from the next supercharger in order to allow the battery to cool back to normal BEFORE I heat the battery with supercharging. Not sure it makes a lot of difference, but it makes sense to me.
     
    • Informative x 1
  18. whitecotton

    whitecotton Member

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    I would be interested to see how long it takes to cool back down after turning range mode off.
     
  19. Boatguy

    Boatguy Member

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    My experience was obviously different than yours. The 8.0 release notes say that the car will maintain 40C, though I haven't figured out of that is a option of something that will be done in all cases.
     
  20. Rocky_H

    Rocky_H Member

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    Two different things--the 50C is talking about battery temperature. The 40C thing is preventing the temperature inside the car from getting too high to prevent deaths of pets left in the car.
     

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