goldbrick
Posts: 828
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: battery heater and days subzero parking

Thu Mar 22, 2018 2:44 pm

LeftieBiker wrote:
I admit that the 30kWh battery appears to be a major loser but Nissan will have to own up to that as they sold them with what I consider a pretty good warranty. And I'm confidant they will be around in 8 years to honor that warranty if and when I need them to.
If it were me I'd be concerned about software "updates" that might make that 9th bar stick around forever...or at least for 6 or 7 years.
I've thought about that too but hopefully it won't come to that. If the EV market does take off in the future it doesn't seem like it would be worth the hit to Nissan's reputation. Another worry is that they didn't figure it out until it's too late and the 40kWh batteries will be just as bad. If it's just 2016 and 2017 that have a problem they can probably swallow that but if they shipped a dud and didn't know it then they are capable of anything. I'm old enough to remember the Ford Pinto so nothing will really surprise me.

LeftieBiker
Moderator
Posts: 14904
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: battery heater and days subzero parking

Thu Mar 22, 2018 2:53 pm

I've thought about that too but hopefully it won't come to that. If the EV market does take off in the future it doesn't seem like it would be worth the hit to Nissan's reputation. Another worry is that they didn't figure it out until it's too late and the 40kWh batteries will be just as bad. If it's just 2016 and 2017 that have a problem they can probably swallow that but if they shipped a dud and didn't know it then they are capable of anything. I'm old enough to remember the Ford Pinto so nothing will really surprise me.
I'm a Geezer too - I remember the Corvair, although I was a kid then. It looks like I'll be leasing a 40kwh Leaf, and I may go so far as to get Silver instead of red, and put in lighter seat covers and a solar ventilator, to try to keep the car cooler. I can afford to lose a third of its capacity (at most) but with the low residual and high payment I'll be pretty unhappy if I have to return the car instead of buying it off lease.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

specialgreen
Posts: 243
Joined: Sun Mar 26, 2017 1:21 pm
Delivery Date: 26 Mar 2017
Location: Minnesota

Re: battery heater and days subzero parking

Mon Apr 02, 2018 2:10 pm

LeftieBiker wrote:I may go so far as to get Silver instead of red, and put in lighter seat covers and a solar ventilator, to try to keep the car cooler.
I've seen contradictory posts about this (shocking, I know :shock: ). Some posters recommend getting a light-colored car to prolong battery life; other people write that it really doesn't matter, because the temp of a parked battery is based on ambient temps, and not on the cabin air temp.

I bought a white leaf, partially based on the advice of the former. But I'm revisiting the question, as I am considering building a car port. I live in Minnesota, where there is a hot season, but it's short.

LeftieBiker
Moderator
Posts: 14904
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: battery heater and days subzero parking

Mon Apr 02, 2018 4:00 pm

I'm thinking that an interior that's ten degrees hotter than it would otherwise be will add heat to the pack if the temps are sustained over several hours or more. I'm still trying to estimate the relative heat absorption of the bright red vs the bright blue, but will probably still try for Brilliant Silver. I'm used to that color.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

arnis
Posts: 1012
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: battery heater and days subzero parking

Tue Apr 03, 2018 1:23 pm

There is no thermal connection between the cabin air and the pack.
There is an air gap between frame and battery. Also cabin air is heavily
insulated by carpet. Cabin can be at 80*C and it will not heat the pack at all.
Also heat raises up. Surface on which Leaf is parked means much more.
Usually it is very hot right before vehicle parks over it. Luckily, if there is any
wind, it will blow heat away. Again...with hot air right from the sides of parked space.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

LeftieBiker
Moderator
Posts: 14904
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: battery heater and days subzero parking

Tue Apr 03, 2018 1:27 pm

arnis wrote:There is no thermal connection between the cabin air and the pack.
There is an air gap between frame and battery. Also cabin air is heavily
insulated by carpet. Cabin can be at 80*C and it will not heat the pack at all.
Also heat raises up. Surface on which Leaf is parked means much more.
Usually it is very hot right before vehicle parks over it. Luckily, if there is any
wind, it will blow heat away. Again...with hot air right from the sides of parked space.
I hope that you are right, but since a hellishly hot cabin is unpleasant anyway, I'm going to try to keep it cooler.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

arnis
Posts: 1012
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: battery heater and days subzero parking

Wed Apr 04, 2018 8:48 am

It's easy. Leave 1cm gaps on two windows :D
Or get white everything 8-)
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

LeftieBiker
Moderator
Posts: 14904
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: battery heater and days subzero parking

Wed Apr 04, 2018 1:35 pm

North America is a bit warmer in Summer than is Estonia, I think. I was planning to look for a solar window ventilator, and to use light grey seat covers in Summer.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

arnis
Posts: 1012
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: battery heater and days subzero parking

Thu Apr 05, 2018 12:23 am

No really, two window slits will allow hottest air to evacuate (roof portion). Yea, NA is hotter mostly.
But to make things very chilly, get partial solar blanket(s) for those windows that are not tinted.
https://www.aliexpress.com/item/Aluminu ... 57346.html
Full vehicle cover is too cumbersome.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

specialgreen
Posts: 243
Joined: Sun Mar 26, 2017 1:21 pm
Delivery Date: 26 Mar 2017
Location: Minnesota

Re: battery heater and days subzero parking

Tue Apr 10, 2018 5:53 pm

arnis wrote:There is no thermal connection between the cabin air and the pack.
This should be easy to test: park a black and a white Leaf for an 8-hour workday. Open inspection port in each and shoot the battery with an IR thermometer.

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