jotunheim
Posts: 20
Joined: Thu Aug 22, 2013 7:51 am
Delivery Date: 05 Sep 2013
Location: Milwaukee, WI

Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 9:40 am

On the way to work this morning, I had the car go into turtle mode rather suddenly while accelerating up a moderate incline. Ambient temperature was about -7°F. At the time that this occurred, the percentage of charge was about 40% and was nowhere near a LBW or VLBW. It did recover partially after bouncing around in the teens and then back up to about 28% in the span of a few minutes. I typically use about 25-40% of the battery to get to work, depending on the time of year, and it was on par with the 40% worth of winter battery consumption when I did finally arrive at work. I also did reduce speed and turn off the heat after this happened, as I was not sure what was going on and really did not want to be stranded in the cold weather.

I don't have LeafSpy, so I am limited on the information I can provide, but I started with about 57% at the beginning of the drive, and have a 20 mile drive to work with about 80% of it on freeway. Battery was at 15% when I arrived. The battery temp meter was at 2 bars, and did rise to 3 right around the time this happened. Power was limited on the car early in the drive, as the top 2 and bottom 3 circles on the power meter were not illuminated. Car was not left plugged in overnight.

I have had the range adjust on me when the battery has warmed up for me in cold weather drives, but this is the first time I have seen it drop like this. I have leased my 2016 Leaf for exactly a year and has about 15,400 miles with no noticeable battery loss yet (12/12 bars), and had a 2013 prior to this. Did the car try to protect the battery when I was trying to accelerate up the hill or is there something more serious going on? If just a battery protection measure, why would the battery percentage drop so suddenly? Anyone else have this happen as well?

Thanks,

Jason

estomax
Posts: 227
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
Leaf Number: 424033
Location: Seattle

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 10:59 am

get the leafspy plugged in, a dead or dying cell has similar symptoms where the battery pack would all of the sudden show way lower charge than reality. i would put my money on that from the small amount of diagnostics info that is available so far.
2013 Leaf SL Premium
27k, 93% SoH 2/17 32k, 96% SoH 6/17
46k, 94% SoH 2/18 52k, 88% SoH 6/18
62k, 87% SoH 2/19 68k, 84% SoH 6/19

jotunheim
Posts: 20
Joined: Thu Aug 22, 2013 7:51 am
Delivery Date: 05 Sep 2013
Location: Milwaukee, WI

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 11:35 am

Thanks - yes, probably a good idea and have the OBDII adapter on order.

I really hope that it is not a cell issue, and the car has not had any issues until this very cold morning.

I don't know if this helps, but when I used the Nissan app the previous evening, it showed the SOC at 57%. When I ran it again in the morning (to see if the battery heater had come on or any other draw on the battery), it showed the battery at 63%. The car was unplugged the entire time. I don't know if this is just a random cold weather thing, or like you said, indicative of a probable cell issue.

My 2013 Leaf would do sudden range drops in very cold weather as well, but never went into turtle and ways always fine once the weather warmed up a bit. I will post back in a few days once the port scanner arrives.

Jason

estomax
Posts: 227
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
Leaf Number: 424033
Location: Seattle

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 11:45 am

individual battery cells would get replaced under warranty at least, so not much risk to you besides the inconvenience. though maybe it is just the very cold weather playing games, i have not had to deal with much below 30F here in the NW.
2013 Leaf SL Premium
27k, 93% SoH 2/17 32k, 96% SoH 6/17
46k, 94% SoH 2/18 52k, 88% SoH 6/18
62k, 87% SoH 2/19 68k, 84% SoH 6/19

Phatcat73
Posts: 478
Joined: Fri Feb 08, 2013 2:44 pm
Leaf Number: 401511
Location: Buffalo Grove, Il

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 12:11 pm

I’ve had my 13 in -12F temps. This issue never occurred. Suggest taking it to the dealer. Defects covered under 8yr 100k warranty.
2018 Tesla Model 3 AWD
2016 SV; leased 20-Jan-17, 25k, 88% SOH; 20-May-19
2015 S; purchased 29-July-14, moved to AZ Nov-2014, 22k, 82% SOH; 01-Mar-18
Solar Array: [url]https://enlighten.enphaseenergy.com/pv/ ... overview[l]

LeftieBiker
Moderator
Posts: 13430
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 2:48 pm

I second the bad cell. I don't think we've seen any other cause for that kind of sudden, huge capacity drop.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
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baustin
Posts: 711
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Sudden Turtle Mode in Very Cold Weather

Tue Dec 26, 2017 5:12 pm

jotunheim wrote:...

I don't have LeafSpy, so I am limited on the information I can provide, but I started with about 57% at the beginning of the drive, and have a 20 mile drive to work with about 80% of it on freeway. Battery was at 15% when I arrived. The battery temp meter was at 2 bars, and did rise to 3 right around the time this happened. Power was limited on the car early in the drive, as the top 2 and bottom 3 circles on the power meter were not illuminated. Car was not left plugged in overnight.

....
The batteries don't perform optimally in cold weather. If you are driving under these conditions to work, especially in cold weather, why are you not starting out with 100% charge? You should have it plugged in and charging overnight.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

garsh
Posts: 1173
Joined: Sat Feb 12, 2011 5:27 am
Delivery Date: 05 Apr 2012
Location: Pittsburgh PA

Re: Sudden Turtle Mode in Very Cold Weather

Wed Dec 27, 2017 3:09 am

baustin wrote:The batteries don't perform optimally in cold weather. If you are driving under these conditions to work, especially in cold weather, why are you not starting out with 100% charge? You should have it plugged in and charging overnight.
That has nothing to do with his problem. If the battery monitoring system is not being reasonable and consistent, then there is a severe problem with the battery pack. He should be able to have it fixed under warranty.
2012 Black SV, bought 2012-04-04, sold 2019-05-10. 7 bars, 101,850 miles.
Current rides: 2018 Tesla Model 3 Performance, 2018 Chevrolet Volt LT

baustin
Posts: 711
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Sudden Turtle Mode in Very Cold Weather

Wed Dec 27, 2017 7:26 am

garsh wrote:
baustin wrote:The batteries don't perform optimally in cold weather. If you are driving under these conditions to work, especially in cold weather, why are you not starting out with 100% charge? You should have it plugged in and charging overnight.
That has nothing to do with his problem. If the battery monitoring system is not being reasonable and consistent, then there is a severe problem with the battery pack. He should be able to have it fixed under warranty.
It may or may not have anything to do with his problem, but it is a very legitimate question. From his description, it is possible he is not regularly charging to 100%, and the cells could be way out of balance. And it could be that he just has a defective battery pack.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

jotunheim
Posts: 20
Joined: Thu Aug 22, 2013 7:51 am
Delivery Date: 05 Sep 2013
Location: Milwaukee, WI

Re: Sudden Turtle Mode in Very Cold Weather

Wed Dec 27, 2017 11:11 am

I have an appointment will the dealer tomorrow morning, so I will update this thread once I have more information.

Not wanting a repeat performance of yesterday's erratic battery performance, I did leave the car plugged in overnight with similar temperatures of around -8°F. It seemed fine on the drive to work, however, I did notice that it took 4-5 miles before the SOC moved from 100%. This is not right, as most any other time, it starts going down within 1/4 mile or 1/2 mile of driving. The SOC was at 67% when I arrived at work, which is a little high for this time of year as well. I would see this more typically with ambient temperatures above freezing. On a positive note, the drop was mostly linear though.

To answer a few questions, the Leaf is typically charged to 100% once a day at work. Usually there is more than enough charge to do a round trip, which is why the Leaf was not fully charged at the house overnight. Thanks for your replies!

Jason

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