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TomT
Posts: 10611
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: Drive at night to control battery temperature

Thu Jul 19, 2018 6:21 pm

Agreed! Why would anyone buy from an EV manufacturer who makes you go through such shenanigans! It is beyond silly and simply unacceptable today!

Nubo wrote:I understand the motivation, but thread titles like this are what makes normies scoff at the idea of electric cars.
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier.

TexasLeaf
Posts: 70
Joined: Wed Mar 21, 2018 5:37 am
Delivery Date: 21 Mar 2018
Leaf Number: 303111

Re: Drive at night to control battery temperature

Fri Jul 20, 2018 2:24 am

Nubo wrote:I understand the motivation, but thread titles like this are what makes normies scoff at the idea of electric cars.


There is a lot of very negative press on the 2018 Leaf because of the battery overheating issue but there is very little dedicated to understanding the issue or how to manage battery temperature. Forums like this are intended to help people with the issues they have with their vehicles. This thread not only offers Leaf owners and prospective owners one technique to manage battery temperature but identifies that the issue doesn’t have to be as bad as indicated in press.

WetEV
Posts: 2371
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Drive at night to control battery temperature

Fri Jul 20, 2018 8:12 am

TomT wrote:Agreed! Why would anyone buy from an EV manufacturer who makes you go through such shenanigans! It is beyond silly and simply unacceptable today!


Makes you? How so? Unless you road trip in the car often in the heat, you don't care. The Leaf is a lower cost around town and commuting BEV. Use it that way, and you will likely love the car. If you want a frequent road trip car for trips beyond one QC, buy something else.

Hammers make horrid screwdrivers.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red

EnigmaEV
Posts: 14
Joined: Mon May 07, 2018 9:52 am
Delivery Date: 31 Mar 2018
Leaf Number: 301349
Location: Saskatchewan, Canada

Re: Drive at night to control battery temperature

Fri Jul 20, 2018 8:34 am

jonathanfields4ever wrote:The temperature gauge is awful. Does anyone know what it means?


Lemon-Tea Leaf has made some great videos dealing with 2018 Leaf battery temperatures. At 32:06 he shows an overlay of temperatures on the new gauge.https://www.youtube.com/watch?v=CNY2xdWaGiQ
2018 Leaf SL, 12,633 km, 94.81% SOH, 117.88 Hx, 109.449 AHr

User avatar
Nubo
Posts: 4942
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Drive at night to control battery temperature

Fri Jul 20, 2018 9:31 am

TexasLeaf wrote:
Nubo wrote:I understand the motivation, but thread titles like this are what makes normies scoff at the idea of electric cars.


There is a lot of very negative press on the 2018 Leaf because of the battery overheating issue but there is very little dedicated to understanding the issue or how to manage battery temperature. Forums like this are intended to help people with the issues they have with their vehicles. This thread not only offers Leaf owners and prospective owners one technique to manage battery temperature but identifies that the issue doesn’t have to be as bad as indicated in press.


I didn't mean to suggest the thread shouldn't exist or even that it's unhelpful. I'm just saying that in larger terms it's unfortunate that 8 years into LEAF production we're still talking about austere methods of coping with battery deficiencies.
I noticed you're still working with polymers.

User avatar
Marktm
Gold Member
Posts: 424
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737
Location: Houston, TX

Re: Drive at night to control battery temperature

Fri Jul 20, 2018 12:29 pm

Some actual experience:
My Leaf is kept essentially every night in a detached garage. It has been a predictably hot summer in Houston, TX (90 -95 degree afternoons - 100's today :twisted: ). Most charging is done overnight, with 3.3 kw power and 80% limit. LeafSpy temps in the morning are in the high 80's to low 90's. The garage floor temp is around 88 degrees (IR gun). Driveway temps in afternoon sun (concrete) are 125 degrees+.

I park in a garage at work and the usual temps when I get back home are in the mid to high 90's. Never hit 100 yet. I put about 6000 miles per year on the car and use it almost every day. This "cycle" has been documented for a couple of weeks now. I'm interested in what happens this winter - will keep taking the readings.

The surprise to me is that the heat capacitance (in my situation) seems to keep the battery at fairly constant temps - and it seems to cool fairly well at night even with LII charging. I'd bet that some QC's and/or parking in full sun (on black tar) would fairly rapidly elevate these temperature ranges. The temp bars have stayed at 6 - never moved since start of summer.
2012 Leaf SL; 36,000 miles. Battery replaced November 1st, 2016.

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