WhiteRexNJ
Posts: 6
Joined: Sat Mar 27, 2021 9:24 pm

Pre-heating the battery, not just the cabin.

Fri Apr 09, 2021 9:27 am

Some EVs do this when you pre-condition them if they're plugged into level 2, does anyone know if the i3 is one of those? I would really like to not have drastically reduced range in the winter (NJ)

For reference, this is my 2nd EV and I just got it a month ago. I am all too familiar with reduced range in cold temperatures.

eNate
Posts: 617
Joined: Mon Sep 09, 2019 5:33 pm

Re: Pre-heating the battery, not just the cabin.

Fri Apr 09, 2021 10:58 am

Yes, if you're plugged in (even to 120 volts), and have a departure time set at least 3 hours in the future, the battery will be warmed. At 120 volts, because the load is greater than what's available through the cord, the battery will be used to make up the difference. It's not much though, maybe a percent or two (probably temperature dependant). I've driven away at 100% on L1 with a preheated battery on a number of occasions.
2 0 1 7   B M W   i 3   9 4 A h   B E V  O a k l a n d
 Wokeby Trunk Extension | Duosida 16A L1 EVSE
 SeaSucker Monkey Bar Roof Rack

WhiteRexNJ
Posts: 6
Joined: Sat Mar 27, 2021 9:24 pm

Re: Pre-heating the battery, not just the cabin.

Fri Apr 09, 2021 8:36 pm

eNate wrote:
Fri Apr 09, 2021 10:58 am
Yes, if you're plugged in (even to 120 volts), and have a departure time set at least 3 hours in the future, the battery will be warmed. At 120 volts, because the load is greater than what's available through the cord, the battery will be used to make up the difference. It's not much though, maybe a percent or two (probably temperature dependant). I've driven away at 100% on L1 with a preheated battery on a number of occasions.
Aha, thank you! Does this apply if I do "climatize now" in the app?

Deutsch100
Posts: 195
Joined: Mon Sep 30, 2019 2:28 pm

Re: Pre-heating the battery, not just the cabin.

Fri Apr 09, 2021 9:36 pm

WhiteRexNJ wrote:
Fri Apr 09, 2021 8:36 pm
eNate wrote:
Fri Apr 09, 2021 10:58 am
Yes, if you're plugged in (even to 120 volts), and have a departure time set at least 3 hours in the future, the battery will be warmed. At 120 volts, because the load is greater than what's available through the cord, the battery will be used to make up the difference. It's not much though, maybe a percent or two (probably temperature dependant). I've driven away at 100% on L1 with a preheated battery on a number of occasions.
Aha, thank you! Does this apply if I do "climatize now" in the app?
No. Climatize now will just pre heat or pre cool the cabin, using the battery, but not pre-conditioning the battery. The only way to precondition the battery is to have the car (preferably Level II) plugged in and to set a preset time (oddly it is called charging too, even if you are just going to use it for battery conditioning. As the other member said, this needs to be set at least 3 hours before your departure. If not, then it just heats or cools the cabin!
2020 i3S Rex; Capparis White

BobB
Posts: 8
Joined: Fri Feb 05, 2021 5:24 am

Re: Pre-heating the battery, not just the cabin.

Sat Apr 10, 2021 9:35 am

Good info. Took me awhile but I finally got this pre-heating the battery information through my thick skull. I do have a related question though - I read somewhere that charging the battery on Level 2 (and level 1 perhaps) prior to leaving also preheats the battery. In other words, the act of charging the battery also has the effect of pre-heating the battery. Can someone confirm?

eNate
Posts: 617
Joined: Mon Sep 09, 2019 5:33 pm

Re: Pre-heating the battery, not just the cabin.

Sat Apr 10, 2021 10:59 am

Yes, indirectly, batteries warm as they charge, and a higher charge rate will result in a warner battery. If you're curious, you can access the secret menu to see the battery temperature during or following a charging session.
2 0 1 7   B M W   i 3   9 4 A h   B E V  O a k l a n d
 Wokeby Trunk Extension | Duosida 16A L1 EVSE
 SeaSucker Monkey Bar Roof Rack

Return to “Technical BMW i3 Discussions”