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Range mode effect on battery pre-warming?

Discussion in 'Model S: Battery & Charging' started by scottm, Dec 24, 2015.

  1. scottm

    scottm Active Member

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    Someone please remind me if leaving the Range Mode ON has an effect on pre-warming the battery, or not, while parked outside all night staying connected to charger and in the morning I raise the charge level for 80 to 90 percent.
    I want to get the battery as unfrozen as possible prior to setting out...

    Thanks
     
  2. Footbag

    Footbag Member

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    You will want Range Mode OFF for preheating to have an effect on the battery. Maybe someday Tesla will realize how silly it is to do the Range Mode settings dance... Sit in car, turn Range Mode On for best efficiency while driving. Arrive at destination, turn Range Mode OFF so preheating will also warm battery pack, and repeat...
     
  3. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    At the very least, range mode should be automatically off when plugged in.
     
  4. Footbag

    Footbag Member

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    Tesla, are you listening? ;-)
     
  5. scottm

    scottm Active Member

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    Thanks! I will truck it back out to the car and OFF the setting.

    Normally, it's off all the time... but I flicked it on whilst driving on this trip out to the mountains, because, you know, range was an issue and I needed to eek out every inch... landed with 3% SOC and a grumpy cold family, but we made it!
     
  6. Andyw2100

    Andyw2100 Well-Known Member

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    They haven't been.

    I've written to them about this, directed them to threads on here, polls on here, etc.

    The situation became worse when Tesla created torque sleep for the Ds, and noted that for it to work best, range mode needed to be on. So now everyone with a D who wants to maximize the benefits of torque sleep should be driving around with range mode on.

    I don't know what it will take for Tesla to get this stuff (range mode, battery preheating, etc.) right, but they certainly haven't done it yet.
     
  7. Footbag

    Footbag Member

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    Oh I'm well aware they aren't quick on the draw with lots of this stuff... The fact that backup lines got added (eventually) and it seems like recent firmware now allows unlocking only the driver door gives me a bit of hope that at some point they will improve this particular situation.
     
  8. scottm

    scottm Active Member

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    #8 scottm, Dec 25, 2015
    Last edited: Dec 25, 2015
    I am looking forward to any new software drop that will restore my broken nav, broken voice commands, and broken bluetooth, that all came along with the first update post 7.0.... :mad: the only thing good for me with last update was restoring the poor HVAC heating performance that 7.0 brought along.

    I needed that heat for this trip... but was flying blind without the nav and really missed the charge estimates at points along the route.
     
  9. David99

    David99 Active Member

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    Do we know as a fact that range mode will reduce battery heating while charging? It only says in the manual that cabin heating and cooling will be reduced, but I don't think it mentions anything about reduced battery heating. I know I have seen many discussions about the reduced battery heating in range mode, but I'm just wondering if that's just something that is repeated here so many times that people assume it's a fact.
     
  10. green1

    green1 Active Member

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    It was well tested as a fact in earlier software releases, but that was quite a long time ago, I haven't heard of anyone testing it in any recent release so it's hard to know for certain if they've improved that logic or not. It really was a ridiculous decision in the first place, so it's possible they've fixed it at some point.
     
  11. Model S M.D.

    Model S M.D. Ludicrous Radiologist

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    Here's a video Bjorn made regarding preheating (he talks about range mode later on in the video at about 10:40): Tesla Model S preheating explained - YouTube This is based on earlier versions of the software. I'd be interested to see if anyone has tested this out recently. I would like to turn range mode on and take advantage of more aggressive torque sleep on my D, but don't want to lose any preheating of the battery or limit regenerative braking.

    Do any D owners turn range mode on? I just keep it off since my daily commute is very short...
     
  12. AWDtsla

    AWDtsla Active Member

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    Last time I tried, the battery heater wouldn't turn on even when max battery power mode enabled, until I turned off range mode. Seems braindead. Check the power draw with powertools.
     
  13. Andyw2100

    Andyw2100 Well-Known Member

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    What many of us do is drive with range mode on, and turn range mode off when we get where we are going, particularly if where we are going is home, where we'll be plugging in. This allows us to still warm the pack when we warm the cabin on shore power, and eliminate some of the regenerative braking limit. When we start our drives, we engage range mode, and if we have any regen limit at that time, it does take quite a while to go away, depending on the drive, etc.

    The fact that we have to play games with turning range mode on and off when we get in and out of the car, though, is just silly.
     
  14. green1

    green1 Active Member

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    Silly is a milder word than I would have used...

    I also find that solution completely impractical because I just don't remember to do it.
     
  15. Andyw2100

    Andyw2100 Well-Known Member

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    I didn't say it was a good solution. :)

    I've written to Tesla several times about this issue, and the larger issue of battery preheating. I've started threads and polls. I'd suggest other owners concerned about this issue also write to Tesla, to express their concern.
     
  16. liuping

    liuping Active Member

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    I have to drive with range mode off in my 90D, due to the high pitched whine when driving at constant speeds when it's enabled.

    I tried turning it on for a recent road trip to try to improve range, but could take the whine and had to turn it off. I have to spend more time at super chargers until Tesla figures out how to solve the whine when range mode is on.
     
  17. AWDtsla

    AWDtsla Active Member

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    It's because only the front motor is being used. Not sure there is a solution that isn't a mechanical change.
     

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