Battery Heater

[Seawind300]

in the last few weeks, I have noticed if the temperature is below 12c, 4 or 5 yellow bars of regen are on. If I drive short trips of 10km or less, the yellow bars will stay on all day (limited regen) Even being plugged in to the HPWC doesn't help unless I do a scheduled charge for an hour or so just before I drive to work . Then the charging is heating the pack. I don't think my pack heater is working. I'll turn on the climate control a half hour before I drive but the limited regen bars are still on. I am afraid to think what could happen when the temps drop to -20c

Mike

 

[timvracer]

Hey Mike... is that an applehead in your avatar? Looks very similar to ours... very cute!

in the last few weeks, I have noticed if the temperature is below 12c, 4 or 5 yellow bars of regen are on. If I drive short trips of 10km or less, the yellow bars will stay on all day (limited regen) Even being plugged in to the HPWC doesn't help unless I do a scheduled charge for an hour or so just before I drive to work . Then the charging is heating the pack. I don't think my pack heater is working. I'll turn on the climate control a half hour before I drive but the limited regen bars are still on. I am afraid to think what could happen when the temps drop to -20c

Mike

 

[Seawind300]

Hey Mike... is that an applehead in your avatar? Looks very similar to ours... very cute!

Yes it is , when she ' licks her chops" she makes the Tesla T

 

[whitecotton]

The software only starts heating the battery actively when It absolutely needs it, to avoid using extra electricity. Another trigger is to turn on your cabin heater.

 

[Seawind300]

The software only starts heating the battery actively when It absolutely needs it, to avoid using extra electricity. Another trigger is to turn on your cabin heater.

I usually warm the car for about 30min with no effect on the regen bars. I'll try longer tomorrow morning.

mike

 

[Brass Guy]

In my experience, the battery heater turns off when the battery is warm enough for about 30 kw regen. You'll notice the battery heater when it gets colder; when otherwise you'd have no regen at all.

 

[Seawind300]

The software only starts heating the battery actively when It absolutely needs it, to avoid using extra electricity. Another trigger is to turn on your cabin heater.

After 1 hour of cabin heating the 5 yellow bars still appear.

 

[Seawind300]

In my experience, the battery heater turns off when the battery is warm enough for about 30 kw regen. You'll notice the battery heater when it gets colder; when otherwise you'd have no regen at all.

I'll wait till we get a few -10c nights and test some more, Thanks.

Mike

 

[apacheguy]

After 1 hour of cabin heating the 5 yellow bars still appear.

It will only actively heat the battery until about 8 C. Once it reaches that set point, you can continue to heat the car but the pack won't be heated any longer.

 

[Seawind300]

It will only actively heat the battery until about 8 C. Once it reaches that set point, you can continue to heat the car but the pack won't be heated any longer.

Good to know, I'll wait for a few cold nights


Mike

 

[taraquin]

If you use range mode on, batteryheater will only kick in when its really cold and only heat battery to like -5C. If range mode is off battery heater will warm battery to around 30 kW-regen. Driving will slowly bring up temp too. I have a 12 kW-charger at home and when temp is really low, like -20C, it still manages to warm battery to get like 20kW-regen With range mode on.

 

[scottm]

in the last few weeks, I have noticed if the temperature is below 12c, 4 or 5 yellow bars of regen are on. If I drive short trips of 10km or less, the yellow bars will stay on all day (limited regen) Even being plugged in to the HPWC doesn't help unless I do a scheduled charge for an hour or so just before I drive to work . Then the charging is heating the pack. I don't think my pack heater is working. I'll turn on the climate control a half hour before I drive but the limited regen bars are still on. I am afraid to think what could happen when the temps drop to -20c

Mike

Check out Doug's blog post about cold weather driving a model S in Canada.

Cold Weather Driving

Little things have changed over time since then, but the gist of most of it is still true.

Drive around with your energy graph up and I find selecting the 25km view is the best for viewing battery heater bumps.

When you do have regen going in the cold, driving hard (accel / regen) will heat up the battery more, so look for hills!

 

[Seawind300]

Update, getting home after Fire practice with a temp of -1c, I plugged in the car with a delayed charging time to start at 7:00am, the wall charger and port both show energy going into the car, the dash shows the delayed charging and 2/48a . So the 2a is for the heater . All is well !!


Mike