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P85D Max Power Mode??
- Thread starter sataponw
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- Driving Dynamics Model S
You're right, it does indeed say that. Oddly, pretty much every other source I googled says just the opposite:
http://www.sersc.org/journals/IJUNESST/vol7_no4/27.pdf
"On-line Measurement of Internal Resistance of Lithium Ion Batteryfor EV and its Application Research"
3.2 "At the same SOC, the static internal resistance of thebattery decreases with the increase of temperature. "
Not trying to start a heated discussion(no pun intended) but just trying to understand it more.
I rebuilt a Honda Insight pack last year and measured the IR of each stick at full charge at difference temperatures and at 1C, 2C, and 3C, the IR dropped at higher temperatures, but those were NiMH batteries.
Ahh. Could it be that in the section you referenced since it's the section an "battery aging and temperature" that they mean that exposure to temperature over time increases IR which is true.
Its the same for most if not all batteries, and especially for LiPo batteries, the internal resistance is lower when the battery is warm. The original poster even gave the reason for this, the "speedier chemical reaction".
If you launch or floor it a number of times it will be ready sooner. It's about temperature so you can make it happen faster.
I think they just know people want to have max power sooner so they gave everyone an option to get it to optimal temperature without using a lot of power to do so.
stopcrazypp
Well-Known Member
I believe part of this may be due to FreedomCar model being used and also them testing as part of a module. There could be conductive elements that increase in resistance from heat.
Interesting. Can you elaborate the conductive element portion and what that might be?
Vger
Active Member
Those of us Roadster owners will recognize this as what on that car is called "Performance Mode." So Tesla is well-versed in doing this, they just did not make it available on Model S before now!
Andyw2100
Well-Known Member
While that's certainly a good question, and an important question, I wouldn't say it's the only question.
I think another pretty important one is how much (or how little, if any) using Max Power may impact battery degradation.
You're the man fiksegts. Thanks.
Not a lot of difference at all. I had figured as much because from the early reports, it had not made much difference in the P90D Ludicrous performance numbers either.
Published on Oct 15, 2015
The latest software version 7 has a new option for Insane mode which allows you to condition the battery for Max Power. This test was done with Max Power in the ready state. There appears to be no notable difference in the acceleration numbers when comparing version 7 to version 6.2. 0-60 MPH was 3.08, 0-100 MPH was 8.31 and 1/4 mile was 11.63 @ 114.9 MPH"
gg_got_a_tesla
Model S: VIN 65513, Model 3: VIN 1913
Well, given that there's no tangible benefit from this and also that it adds a bit to battery degradation, I'd not be using this ever for sure.
If someone desperately wants to do an Insane launch straight out of the garage in a cold clime, it'd make sense to have the option in the mobile app; it's kinda silly to have to go to the car 20-some minutes before actually leaving, to turn it on. It's all moot, for me anyway.
If someone desperately wants to do an Insane launch straight out of the garage in a cold clime, it'd make sense to have the option in the mobile app; it's kinda silly to have to go to the car 20-some minutes before actually leaving, to turn it on. It's all moot, for me anyway.
Mine charged while I was driving. Not sure you have to be parked for it to gear up. That said, I noticed only a marginal difference. I suspect its more about preventing loss of performance in sub-optimal conditions.
Andyw2100
Well-Known Member
Tesla gives us this, but still doesn't give us an option to heat the traction pack on shore power to avoid having a regen limit. Which option would help more people more often?
Geez. That makes even less sense. The battery would have to be *really* cold to not be able to draw it's 350KW. Maybe the P85 has less than a 1300 amp fuse? If so, then I guess it could help.
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