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‘18 100D Battery in cold weather problem (Regen related)

Discussion in 'Model S' started by Pwdr Extreme, Dec 3, 2018.

  1. Jan Fiala

    Jan Fiala Member

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    Btw. There is a max battery mode on non P models?
     
  2. ramonneke

    ramonneke Active Member

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    There is not, but I think it is Tesla Bjorn that stated that there might be some form of battery heating that is activated when you navigate to a Supercharger. This way the battery will charge with a higher load on arrival.
     
    • Like x 1
  3. Pwdr Extreme

    Pwdr Extreme Member

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    I had my navigation turned on and was heading to the Idaho Falls supercharger the first 220 miles of my trip, which had limited regen the entire time.
     
    • Informative x 1
  4. Jan Fiala

    Jan Fiala Member

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    Guys, do you remember how is the regen limit disappearing? I just noticed today, that in the present sw version 46.2, the regen limit disappeared at once from 5 yellow bars (ca 30 kW regen) to zero limit. There was nothing in between. Is that new behavior was the V8 identical?

    P.S. Despite showing no regen limit in the instrument cluster, the car was not using the full regen for another couple of minutes. This sucks, as you rely on the information provided on the IC expecting full regen during braking ...
     
  5. Joelgjr

    Joelgjr Member

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    I have limited regen when its 10sF and 20sF and 30sF and even 40sF until I've drive about 20-30 minutes at highway speed. Nothing else including AC charging will fully remove the regen limit. This has been normal with my MS100D since day 1
     
  6. boonedocks

    boonedocks Active Member

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    Another odd behavior due to low regen levels I have with my S100D is that TACC and A/P uses the brake much more than regen in stop and go traffic which results in an almost jerky slowing and stopping in stop and go traffic. My wife’s X75D and a loaner X75D I had did NOT exhibit this jerky frantic feeling of A/P in stop and go traffic.
     
  7. Big Earl

    Big Earl bnkwupt

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    Bjorn stated that's a rumor. From what I can tell, there is no truth to it (yet).
     
    • Informative x 1
  8. Big Earl

    Big Earl bnkwupt

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    The icon with three red wavy lines is the seat heater. The battery heater icon looks like a tiny battery with a red snowflake in the middle (at least as of last winter).
     
    • Helpful x 1
    • Like x 1
  9. Pwdr Extreme

    Pwdr Extreme Member

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    If the icon with the wavy lines is the seat heater, then my battery heater has never turned on. The only icon that shows up is the defrost (sometimes) the red arrows and what is apparently the seat heater. Tesla still hasn’t called me back which is extremely frustrating as I am 10 minutes from the service center and have been since I called them. I’m headed back to Montana tomorrow where there obviously is no service center. I stressed this fact to the lady on the phone who told me she would “expedite it”. I’ve been a Tesla owner for a couple years, I have to say the level of service has dropped DRAMATICALLY. 2 years ago I considered them on par with and even better than Mercedes, now I get better service from my local Chevy dealership. Quite dissapointing...
     
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  10. TMeister

    TMeister Gearhead

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    Data from yesterday's drive...

    Car cold soaked in garage overnight at 46 degrees.
    Started out with 5 bars on regen limiting, outside temps in low 40s
    Drove about 20 miles in town (speeds below 40) with multiple stops.
    Regen got to 4 bars. An occasional 3+
    Back in the garage, now at 48, three hours soaking there
    Another 20 miles of urban driving and then regen limit gone. It went from 3 bars to none in an instant
    Charged at 6 kW in 44 degree parking facility for 3 hours, regen limit still gone
    This morning after soaking in garage overnight at 46 degrees, back to 5 bars of regen limit.
     
  11. Pwdr Extreme

    Pwdr Extreme Member

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    My regen just never seems to go away except for right after supercharging for 30 minutes or more. There has got to be something wrong with my battery heater. Tesla STILL hasn’t called me back, so much for 24-48 hours...
     
  12. hiroshiy

    hiroshiy Supporting Member

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    I would recommend subscribing to TeslaFi, or purchasing a cable to use TM-Spy app for iOS or Android. Below is a screenshot from the latter app. As you can clearly see you will see changes in battery module temp. The leftmost is module 1 coolant inlet, then module 1 outlet, module 2 inlet, outlet, etc. Very easy to use. With TeslaFi you can add a column to show if the battery heater is on or not. Screenshot_20181216-150400.png
     
  13. Pwdr Extreme

    Pwdr Extreme Member

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    Well, the mystery has been solved. Tesla never did call me back, so since I’m still in Salt Lake, I was sitting on their door step at 8am this morning and they were able to fit me in. They determined the coolant pump that circulates the coolant around the batteries had failed, hence it wasn’t able to heat the batteries. Or cool them, for that matter.

    Hopefully that will take care of the problem. Certainly should anyway.

    What I don’t understand, is why don’t these cars have a “check engine” light, so to speak? The computer showed a failure on the coolant pump, so it took them literally a couple minutes to diagnose it, wouldn’t you think as sophisticated as these cars are, it would have tripped some sort of warning light? If I wasn’t a previous Tesla owner and had a pretty good idea that the battery wasn’t heating, it would have been like that all winter, which certainly wouldn’t have done the battery any good.
     
    • Informative x 2
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  14. skitown

    skitown Member

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    Glad you got it sorted. I had a battery coolant heater fail and get replaced by our Ranger on our Model S 85D the other day, so I was wondering about that as I was reading through this thread. FWIW, that issue hit us a couple weeks ago when it was really cold here - sub zero temps. I didn't notice anything different with regeneration specifically, but the car did throw errors stating that it might not start back up again and that it needed service. Our Ranger told us not to risk driving it, SLC diagnosed it the next day and shipped him the part.
     
  15. N..8

    N..8 Member

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    Pwdr, Good to hear that they fixed it. The pump may have had a mechanical issue and I'm not sure but I've never read anything about the coolant/heater system having a flow sensor so maybe a weak link in the detection.
     
  16. Pwdr Extreme

    Pwdr Extreme Member

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    From the work order:
    Inspected and found alerts for battery pump stopped, inhibiting battery heater operation. Determined that the pump had failed. Replaced pump.

    When it says found alerts, I’m assuming that is a stored code in the computer, I just don’t understand why it didn’t trigger a driver alert.
     
    • Like x 3
  17. boonedocks

    boonedocks Active Member

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    And OR why it wouldn't have notified Tesla remotely triggering someone to call you for service. So odd...
     
  18. MP3Mike

    MP3Mike Well-Known Member

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    They are probably too busy to handle the proactive support alerts now. But that just means that they need to have the alerts show up to the driver so that they can take appropriate actions.
     
    • Like x 1
  19. Pwdr Extreme

    Pwdr Extreme Member

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    Agreed, if my Yukon can set a check engine code because I left my gas cap loose, the Tesla sure as heck should be able to notify me the battery temperature management system isn’t working properly.
     
  20. SeminoleFSU

    SeminoleFSU Voluntaryist

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    I have noticed this too. My 2013 P85 was in a lot at the beginning of my ownership, but after 50k miles and all the kinkds were worked out I rarely had to interact with Tesla Service. Fast forward a few years and DAYUM is Elon sharing his Joe Rowan twizzle with the rest of the company? At least we can still call the individual service centers and sometimes get someone to answer... Today I had to choose option 5 (parts) to get someone to pick up... hehe.. But GOOOOOD LUCK calling the National Customer Support. I've done at least 3-4 sessions of OVER AN HOUR waiting on hold before I hung up each time. It's told me my wait time would be "more than 30", "more than an hour", and one time "more than 5mins". That last one I waited exactly 74 mins before hanging up and going to bed.

    Luckily we have 2 service centers here in Atlanta. Since the driving distance isn't terrible to either one, I often will call one and if I can't get some body, call the other... Heck, at one point I called one (decatur) and got blown off about not having the NoA maps (said their firmware guy was out until the following week) so I called the Marietta location and he booked an appointment immediately. They really do run each one like a separate company almost. Sad we have to do this because I believe it creates more work for them... but if you rely on them to be proactive you'll be looking like this:
    2pa940.jpg
     
    • Funny x 3

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