Ingineer said:Zero C or 32 F.Twiggy said:Phil,
When you say "zero" are you saying "zero F" or "zero C"?
-Phil
Why do you think the LEAF's battery heater doesn't turn on until much much colder?
Ingineer said:Zero C or 32 F.Twiggy said:Phil,
When you say "zero" are you saying "zero F" or "zero C"?
-Phil
QueenBee said:Ingineer said:Zero C or 32 F.Twiggy said:Phil,
When you say "zero" are you saying "zero F" or "zero C"?
-Phil
Why do you think the LEAF's battery heater doesn't turn on until much much colder?
JPWhite said:It's not clear to me if the cold climate heater is triggered by battery temp or ambient temp. If it is triggered by ambient temp, Nissan may have determined this is a good time to turn on the blanket?
Besides heating, the LBC limits charge rate to mitigate lithium plating while charging in freezing conditions.JPWhite said:I suppose the answer to my original question if Nissan have done anything to mitigate lithium plating while charging in freezing conditions, I suppose the answer is no. At least not in moderate freezing conditions, the blanket only triggers when the battery gets very cold.
jkirkebo said:Well, here's one report from Norway
My Leaf is now a little over 1 year old, 12000 miles and no sign of any degradation. Gids after a full charge is usually 279 and always 231 at 80%.
Last winter I was down to a single temperature bar more than once. I once tried charging from 80% to 100% when at one temp. bar and that didn't work out well. The SOC-meter showed only ~500 watts going into the pack so charge rate was way down. I aborted the charging and started driving instead, which quickly brought the pack up to 3-4 bars. No problems with charging thereafter.
So I do not think the cold is a problem for pack longevity, but it might impact charging if it gets cold enough. My advice is then to charge to 80% right after driving, when the pack is warmer. Do not let the car sit in the cold for long (a day or more) with a depleted battery as charging it up later might take forever.
Rauv said:That's just great. Now I have to worry about permanent battery reduction issues in the cold. It was 8 degrees F yesterday morning here. Maybe I need to charge at 120 this winter overnight instead of 240 to prevent permanent battery degradation, per the Battery U link from the previous poster. I have the cold weather package, and it the battery warmer should have kicked on at 14 degrees F, but our garage probably did not get that cold. How would I know that the battery warmer is on? Are there any icons on the dash or carwings (yeah, right ), or additional load on the charging circuit? I will keep an eye on it tonight--It is supposed to be cold again.
JPWhite said:philipscoggins said:Seems like if there was battery damage from cold, the Chicago people would be shouting by now.
Philip
Judging by Phil's response, it seems prudent to plug-in and charge directly after stopping the vehicle when the temp is below freezing outside.
My routine in the summer is to leave the car at least 30 minutes before plugging in after getting home. In the winter I won't wait.
willingp said:--as noted by others, regenerative braking does not work when battery is cold, like two bars
--during my 16 mile commute, the energy monitor screen shows that this defrost setting plus the seat and steering heater uses an average of about 0.5 to 0.75 KW.
Den said:--during my 16 mile commute, the energy monitor screen shows that this defrost setting plus the seat and steering heater uses an average of about 0.5 to 0.75 KW.
. said:Energy monitor doesn't display consumption of seat and steering wheel heaters at all. So I wonder how you can know it from energy monitor!? :shock:
willingp said:Here is my $0.02 shout from a climate colder than Chicago:
I have 2012 model, upstate NY, 1000' elevation. I have to chuckle when I read about 32F as being "cold". Cold here is below 0F, which frequently happens in winter. I do not have a heated garage, but have had no problems with 2012 model in the cold:
--If I charge as soon as I get home, and it's below 0F the next morning, battery heater keeps it at 2 bars
--If I set timer to charge at 2am, I have 3 or 4 bars in the morning when it's below 0F
--as noted by others, regenerative braking does not work when battery is cold, like two bars
--using the cabin heater to keep it toasty warm, like 65F, uses a humongous amount of battery: WITH cabin heater, my commute takes 14KWH of charging, compared to 9 or 10 in warm weather. I don't use cabin heater any more.
My settings for using Leaf in the frozen north:
--I HAVE NOT FOUND THE NEED TO USE THE CABIN HEATER AT ALL, EVEN BELOW 0F.
--I pre-heat the car while plugged in, for 5-10 minutes.
--I use the front seat and steering wheel heater (I no longer need gloves driving to work at sub zero temperatures).
--I set the front defrost on, then turn off AC, then set to minimum fan and minimum temp (60F)
--during my 16 mile commute, the energy monitor screen shows that this defrost setting plus the seat and steering heater uses an average of about 0.5 to 0.75 KW.
--At below 0F, recharging after my commute takes 10-11 KWH instead of 9-10 KWH in warmer weather, using this setting; and window never fogs or ices up (not at sub 0F, nor even when raining and 33F).
--and, no, I am not particularly cold hardy; my regular heavy winter coat plus the above keeps me quite comfortable, at least for my 35min trip.
Paul
Yes, the battery warms up quickly when driven and the regen comes back, assuming the charge isn't in the 90-100% range.Den said:willingp said:--as noted by others, regenerative braking does not work when battery is cold, like two bars
Not true! It doesn't work (or works badly at max. 1-5kW rate) only for couple of first kilometers driven. Then it works better and better with every km driven (as battery warms up, even temperature bars doesn't change). You can monitor it by power-circles (at negative side, if it is double-circle it is working, if single then not) or by energy monitor...
dgpcolorado said:Charging at an EV friendly motel in Silverton, Colorado, elevation 9300 feet.
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