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All of you P85D owners can cry me a river! lol
Your time in the sun is limited and the clock is ticking. A bigger, badder, faster Tesla is around the corner. You'll be top dogs for about a year, if that. Welcome to owning a Tesla.
Exactly. Well put.
I don't know why @kris is thinking there will be a new model this soon, clearly with the 85D update, and the fact that the P85D is not putting down nearly as much as advertised, the update will likely happen soon. Also, it was promised on the website along with the 155mph limit: we got the speed limit increase, but the power increase will follow IMO.
Yes, a 100kwh+ battery is coming at some point, but not for Model S for at least a year after P85D unveiling.
Did the 70D’s extra range came from simply replacing the 60’s 2012-era cells with new ones that are 15-percent more efficient?
If so, that means that the Holy Grail of a 100-kWh Model S with a 320-mile EPA range—essentially the current 85 refitted with the same new cells—could be just around the corner.
Alas, it is not to be.
A Tesla spokesman confirmed to me that the bigger battery capacity comes from more cells, not better ones.
If if I told you a couple of weeks ago that the 60kW model was going to be instantly discontinued and replaced with a larger battery and better performing 70D model, you wouldn't have believed me and would have said another model wasn't coming for a while. Guess we'll wait and see.
Not the same. I would have given that theory some consideration, given that the 60kWh has been around for 2.5 years and sales are very low.
P85D has been around for 5 months, and sells very well. There is no need to put out an upgrade this soon.
I'm not suggesting Tesla isn't capable or willing to make changes to their lineup unannounced, what I'm saying is that they won't purposefully come out with a new model to replace the P85D so soon. I'd say earliest time for P100D is Dec. 2015.
Facts:
1) Tesla advertises 691hp.
2) Tesla isn't delivering 691hp (or anywhere close).
3) Tesla promised power update for P85D specifically ("beyond what anyone outside of Tesla has experienced")
4) Tesla has a record of increasing hp limits using software update (85D, P85).
Conclusion:
Tesla will increase hp limit of P85D just like they did to the 85D.
Which theory is more likely in your view?
Elon's tweet spesifically said, that this new product is not a car.
https://twitter.com/elonmusk/status/582581865682350080
Not the same. I would have given that theory some consideration, given that the 60kWh has been around for 2.5 years and sales are very low.
P85D has been around for 5 months, and sells very well. There is no need to put out an upgrade this soon.
I'm not suggesting Tesla isn't capable or willing to make changes to their lineup unannounced, what I'm saying is that they won't purposefully come out with a new model to replace the P85D so soon. I'd say earliest time for P100D is Dec. 2015.
Facts:
1) Tesla advertises 691hp.
2) Tesla isn't delivering 691hp (or anywhere close).
3) Tesla promised power update for P85D specifically ("beyond what anyone outside of Tesla has experienced")
4) Tesla has a record of increasing hp limits using software update (85D, P85).
Conclusion:
Tesla will increase hp limit of P85D just like they did to the 85D.
Which theory is more likely in your view?
Honestly, as a P85D owner, I really hope what you say here is correct and I am dead wrong, because this is what I hope happens. Unfortunately, I just feel it can't be done without a larger battery.
I finally got around to doing some testing of the cell level fuses using a power supply and my DC electronic load.
I was able to get them to carry 24A for 60 seconds+ and they would consistently pop within a second or two at 25-25.5A.
Honestly, that's more power than I had figured they were able to handle. Assuming they're sized for 25A, that's 90W per cell, almost 40kW per module, or close to 8C max before consistent popping.
Using an NEC-style 25% margin gives me a constant current draw of about 19A possible before popping fuses. That'd be about 6C, or about 485kW nominal for an 85kWh pack.
This could explain the reason the P85D doesn't show 691 HP (515kW) under full acceleration. However, that's speculation since the D variants have a different battery pack part number which may or may not have larger fuses. No way to know for sure until someone tests the fuses in one. I believe the full 515kW+efficiency losses could be pulled from a fully charged pack for a very short burst, though.
Edit: It's worth noting that the primary goal of these fuses is likely simply to prevent a single cell with an internal issue from destroying the rest of the cells, not to protect against module max current draw. Let's say a single cell developed an internal short. The other 73 cells in that set would then be sending all of their power through that cell, since they're in parallel. With the fuses, the fuse would just pop under the hundreds of amps available, and barring any thermal issues related to the bad cell, would save the rest of the cells.
The difference between what the P85D is pulling from the battery now (estimated ~410kW?) vs what it would need for 691 HP (~515kW) is ~4.83C vs 6.0C.
Except from my other thread (bolds/underline/italics added for relevancy):
So, IMO it's definitely possible to pull the full amount from the existing battery in short bursts. Tesla would certainly be able to narrow down what a safe short burst would be. They don't have to use a 25% safety margin, which I arbitrarily chose for my above write-up, giving even more potential power.
Most of the focus here has been on the P85D and why we won't be seeing a new battery because the P85D doesn't need it. What about the Model X? I wasn't suspecting a new battery soon so the P85D drivers can squeeze another 3/10's off their 0-60 times. I was thinking more in terms of the range of Model X. And if the Model X gets a larger battery capacity, so likely will the S.
You are not the guy I'm going to take on with a bet about batteries! In your opinion will they be able to get 270 mile range out of the X to match that of the S85D?If they P85D doesn't need a new battery, the Model X doesn't either. $100 says the Model X does not get > 85 kWh battery at launch.
You are not the guy I'm going to take on with a bet about batteries! In your opinion will they be able to get 270 mile range out of the X to match that of the S85D?
read the tweets in the first post, and you'll see Elon teasing the possibility of a reveal of a Model S that can do 0-60 in 2.8 seconds as a warm up act to the 4/30 product that's not a car event.