It will be interesting to see real world sub zero (-1F and below) Model 3 testing I hope I get some good data before next year when I palace my order as it will determine if I need the LR or SR battery. I think if it can stay below 300 WH/mile average on a 80 mile drive (level ground highway speed sub zero) the SR will work for us... I hope it does would like to save the $9k. ( :
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Dynastar
Member
Not being an engineer type, it seems like the reaction to Tesla's new battery heating scheme from folks that understand this stuff is "huh... interesting". Is that accurate? Is it too early to tell if this is a stroke of genius or an annoying cost cutting measure?
The charger area of the battery pack can still be accessed under the rear seat. See High Voltage disconnect thread.
"Even when parked, Tesla’s software can send a request to the powertrain inverter to start powering up and pass the appropriate currents to the motor in order to produce enough heat to warm the cells – all while not producing any torque so the Model 3 doesn’t move."
This is not a heat pump.
This is not a heat pump.
You are talking about 160 miles round trip? My wife needs to make it 140 mile round trip but we have one or two winter seasons to find out people's experiences with the SR.
It is almost certainly an annoying cost cutting measure. How annoying is unknown and probably depends on where you live.
People need to understand that the Model 3 is a CHEAPER CAR, not a better one. Tesla pulled out all the stops they could find to DECREASE MANUFACTURING COST. Remember that this car is supposed to compete with a Bolt and the cheapest cars of the luxury brands.
I would actually have been shocked if the cells were better than the existing Model S/X cells in terms of anything other than cost, since cost reduction was the whole point of the new cells. Remember that Tesla was able to create an awesome sports car in the Roadster 8 years ago with crappier cell technology than what the S/X currently uses. Tesla does not need to create higher performance cells. They need and needed to create cheaper ones.
The Model 3 will still be an awesome car for its price point.
Reciprocity
Active Member
Dont you want to also cool the motors and wouldnt this system also have the advantage of helping cool the motors as they heat up?
On a side note, I believe that the Jaguar I-Pace does the same exact thing. You would have to search and find the video, but where harvesting heat from the motors for the cabin, I dont recall if they where doing the same for the battery, but it would make sense as that would be closer to the motors.
As I understand it, instead of heating the battery directly, they are going to heat up the motor first, and then use heat from the motor to warm the battery. So it will be slower to warm up the battery and be less efficient.
So lower cost but also worse performance.
SageBrush
REJECT Fascism
I didn't say it did. I'm just pointing out that heating up a space can cost a lost less energy than a resistive electric heater.
And FYI, for the S and X, the warranty is voided if left at -22F or below for 24 hours.
Battery warranty and temperature below -30C (-22F)
Dynastar
Member
Swampgator
Active Member
None of us knows if the new method is better or worse than the one used on S and X.
But what exactly in Tesla's culture and history leads you to believe they will move to a less efficient heating method for the pack?
Remember Elon said on the last CC that they have money set aside to bring all models up to the current tech level.
I take that statement as bringing S and X up to the current Model 3 tech. Model 3 may be cheaper than S and X but the tech is always evolving.
There is a reason for example the Semi revealed next month uses Model 3 motors and not Model S motors.
But what exactly in Tesla's culture and history leads you to believe they will move to a less efficient heating method for the pack?
Remember Elon said on the last CC that they have money set aside to bring all models up to the current tech level.
I take that statement as bringing S and X up to the current Model 3 tech. Model 3 may be cheaper than S and X but the tech is always evolving.
There is a reason for example the Semi revealed next month uses Model 3 motors and not Model S motors.
If left outdoor by mistake, what are the chances the car is plugged in? I haven't installed a charger on my driveway.
How far a cord can the chargers come with anyway since even 110V seems to be enough for the S or X?
I doubt my non-insulated garage will go as low as -22F in the winter so it's really those people who get stranded on the road and can't get access to a charger. No sure what the likelihood of warranty voiding is if the car can be plugged into a 110V socket using maybe an 8-10 gauge cord.
I don't own a BEV so I haven't looked into the charging details.
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Yes first leg would be preheated car plugged in, trip back would be cold soaked car no plug supercharger on the way is doable but inconvenient and slightly out of the way. (Would add 20 miles + charge time)You are talking about 160 miles round trip? My wife needs to make it 140 mile round trip but we have one or two winter seasons to find out people's experiences with the SR.
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