True, but that series connection connects the battery and motor/inverter coolant loops. It still doesn't connect anything to the cabin heating/cooling system.
Big Earl
bnkwupt
Cabin heating is PTC only - no connection to the battery, motor or inverter. There is no way to get electronics heat into the cabin.
Battery cooling is accomplished by modulating the valve that connects the battery coolant loop to a heat exchanger in the refrigerant system (chiller).
this was screen grab from chargepoint from 6:30pm to 10:30pm when i tried the chargepoint, then 120v, then back to chargepoint. ALL the spikes above .3kw are when i was blasting the cabin heater at max you can easily see here how for 4 hours straight the car wouldnt pull more than 1A. during this time frame the car only charged from 10 miles range to 14 miles. so about 4.5 miles gain in 4 hours
a bit more detail when i click on sections im doing this from my phone using google drive and remote desktoped and downloading and uploading lol and im at a supercharger right now too tried 4 chargers cant get more than 34kW and i only have 60 miles range right now wtf
this photo shows how the car refused to use more than 350 watts for charging. after 50 min here in this session i turned cabin heater back on because i was freezing my ass off
this photo shows how the car refused to use more than 350 watts for charging. after 50 min here in this session i turned cabin heater back on because i was freezing my ass off
finally here is the session from the holiday inn you can see from the start it was limited and it took about 5 hours before it was able to start charging at normal rate
and here is my car right now once again slowwwwwwwly charging at a supercharger tried 5 stalls cant get higher than 32A.
ok its been 50 minutes since i got here charging , rate went up slightly but time remaining only dropped by 20min lol this is so slowwwww
Big Earl
bnkwupt
I assume these are from the other day and not right now.
The slow supercharging is likely due to the cold battery temperature. It can take a long time for it to heat up enough to allow full speed charging.
The slow supercharging is likely due to the cold battery temperature. It can take a long time for it to heat up enough to allow full speed charging.
hiroshiy
Supporting Member
Graffi
Member
@yobigd20 I bet you will never park for a long period of time on very low charge level. I feel your pain, but hope I never have to experience that. An extra 30 to 40 minutes on the supercharger on your way when the battery was warm would have saved you from alllllllllllll that heartache.
Good luck the next trip.
Good luck the next trip.
Lol sorry i was ranting in the last 2 photos those were from today charging at a supercharger in albany. the bunch of charts i posted today in the post before that were the charging sessions from the whole fiasco that happened last week i screen grabbed them right from the chargepoint mobile app. those represent exactly what happened with the car refusing to charge in the cold soaked state. as far as today's slow charging, i tend to see this more frequently. my car just doesnt like to charge fast like it used to it seems.
Brass Guy
Active Member
Maybe a silly question, but have you ensured range mode is off? I quickly scanned this thread and I didn't notice you mentioning it.
If it is off, this has to be a software bug. There's no reason not to be drawing the ~6 kw for the battery heater.
If it is off, this has to be a software bug. There's no reason not to be drawing the ~6 kw for the battery heater.
tried both ways having it on and off. no difference in effect.
Brass Guy
Active Member
I can see turning off the battery heater if you're cranking the cabin heat and shore power can't keep up with both heater systems with SOC<10%, but this behavior is unacceptable.
Aside from a few minor features (in my "classic"), version 8 is a terrible disappointment. Not only do I now have to be conscious of my app placement, and hiding map icons when I need them most, I have to be more cautious about my end-of-day SOC traveling in cold weather; lest I be sitting at a SC for a day!
Aside from a few minor features (in my "classic"), version 8 is a terrible disappointment. Not only do I now have to be conscious of my app placement, and hiding map icons when I need them most, I have to be more cautious about my end-of-day SOC traveling in cold weather; lest I be sitting at a SC for a day!
This isn't new in version 8. Tesla has never had a way to prepare the pack temperature for supercharging speeds. It's just not a concern for them. Sort of like the glove box should open if you're in a severe crash. Maybe you should have thought of this without someone crashing first? Maybe if enough people tweet about getting their car stuck effectively unchargeable they'll do something about it.
This would be great a great feature on both ends of the temperature scale. In the winter to let you warm the pack in preparation for supercharging, and in the summer to cool the pack to delay the onset of the ramp as much as possible.
Brass Guy
Active Member
I wasn't really thinking about preparing to supercharge. Just if you plug in and the power's there, turn on the battery heater. From the OP's experience, if the battery's too low, it will not turn on the battery heater even if there's plenty of power; so no matter what you're stuck for a day while it trickles to 10%. Bogus.
Lloyd
Well-Known Member
I don't think we know that, I suspect that Tesla doesn't consider 30A @ 207v "plenty of power". If someone comes back and says that the battery heater won't turn on with a 40A @ 240v supply, then I would agree that things are really wrong.
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