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75 and 75D variants increased performance from July 1st - software and hardware improvements?
- Thread starter Bluejuice
- Start date
When I put my P90DL in sport mode, my battery dropped from 395 to 332 volts at 1160 amps (385 Kw) at full power. The 352.8 volt battery would have to supply 1390 amps to provide the same power. This assumes it has the same internal resistance of 63V / 1160A = 0.054Ohms as a 90 Kwh battery. It should since it has the same number of cells in parallel.
You are forgetting that they redesigned the packs so there is a less voltage drop now. So maybe under the 1000 amp load the new 75kWh packs will sag to about the same level that your 85 kWh pack does. As well the DU have been changed and may be more efficient, so they don't need to draw as many amps to get the same level of performance.
My guess is that the current 75kWh packs are using the newer module design from the 100kWh packs that have lower internal resistance. (Even the newer 90kWh packs have lower IR than the older ones.)
I have a version 3 p90dl pack with the lower resistance, and used my actual measurements to get an equivalent current for a 75Kwh pack.
I wasn't aware that the new chemistry improved the voltage drop by that much. That would be quite a feat to squeeze out more efficiency from the motor (mine is 92-93% efficient under WOT). Really eager to see the first hard stats for this new motor.
Did the resistance of the packs decrease with revision number? Meaning is a V3 pack lower than a V1 90 kWh?
Oh, I see. Can we attribute this effect to something more concrete than just "new chemistry"?
They changed the interconnects in the 90 V2/V3, and 100 kWh packs to reduce the IR. I'm not sure if they have done that for the current 75kWh packs, but it would make sense and could be part of the reason for the performance improvement.
until you are ready to buy a new car better stop looking at the incremental changes otherwise you will drive yourself crazy
.....i will employ the same strategy for my Tesla as I do with iphones....the second you purchase there will be better model in short order.....be happy with your decision at the time you made it ... no looking back ....you still have the best car on the road IMHO.
.....i will employ the same strategy for my Tesla as I do with iphones....the second you purchase there will be better model in short order.....be happy with your decision at the time you made it ... no looking back ....you still have the best car on the road IMHO.Yes. There was less voltage sag at 1500 amps with v3 than there was with the earlier packs.
LargeHamCollider
Battery cells != scalable
After the 100 pack came out last summer I ran some numbers and found that cell DCIR had decreased about 35% since the original S came out. I forget the exact number but it was around 35%.
Jlwine
Member
I haven't had time to read all 19 pages of this thread, so i apologize if this is repetitive. I spoke with "Jesse" today from Tesla support who informed me that the 60D that i purchased nearly exactly a year ago, (HW1 of course) and which I upgraded to 75D a few months ago after the price drop, will indeed receive a software package that increase 0-60 to 4.2 sec. I remain VERY skeptical that this is true--but it will be AWESOME if it is true. He said this only applied to "D" cars and is included in software version 17.26.17. Time will tell.
I ordered a 75 in late May which entered production around June 15. According to my DS I didn’t receive the new drive unit, but looking at the codes in the “View Spec” URL shows that it has the DU00 option (which is odd because only D models are supposed to have DU00, non-D should have DU01). I asked for clarification.
I've reviewed some configuration codes in teslascout.com, and "old" versions of model s doesn't have neither DU00 or DU01 codes. For example, this 75D
TeslaScout - CPO / Inventario en varios países, but includes CH04 (72 AMP)
The only one I've found with DU00 is this 2017 Model X 90D: TeslaScout - CPO / Inventario en varios países
my ordered 75D (ends of may, vin 2038), includes DU00 and CH04, and my DS has confirmed me that includes the hardware & software performance.
TeslaScout - CPO / Inventario en varios países, but includes CH04 (72 AMP)
The only one I've found with DU00 is this 2017 Model X 90D: TeslaScout - CPO / Inventario en varios países
my ordered 75D (ends of may, vin 2038), includes DU00 and CH04, and my DS has confirmed me that includes the hardware & software performance.
turbosimon
Member
It would be great if the software update alone can do the job. I talked to DS today for my 75D with build date of 6/21/2017 (delivered on 6/25/2017). I was told my car will require Firmware and Software update and I would need to bring the car to the service center. Anyways, it would be great if I can get the performance enhancement. I believe Tesla is working out the details for this...
Same here, 60D to 75D. Hope that specialist is correct! Thx for inquiring. Def not necessary but would be great.
I'm a new owner and I heard in the past (i believe) the 85 got this sort of update - was this a software update for free? I'm just wondering, if this software update is made available, given their history, tesla prob would make it free, right?
GaryREM
Member
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