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Mike_Schlechter
Model S - P457
Just now on Twitter:
@elonmusk Battery pack swap works with all Tesla Model S cars, past and present. It was always there.
Anyone else think he reads these and then decides how to best mess with us? I almost hope that is the case...
@elonmusk Battery pack swap works with all Tesla Model S cars, past and present. It was always there.
Anyone else think he reads these and then decides how to best mess with us? I almost hope that is the case...
mitch672
Active Member
It's the theory I proposed on the June 20th thread, they connect directly to the battery pack and do a DC to DC transfer of power.
They don't actually "swap" anything, other than electrons. There "robot" is a simple device that unplug the inverter/motor (or uses spare ports on the pack). It's their new "Hyper Charger"
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strider
Active Member
It's been crash-tested by Tesla and results reported to the DOT. It just hasn't been tested by the DOT itself.
Elon has stated that the swapping will work with all Model S's and no one has seen the wiring that would be required for such a setup. Owners have had the front and rear ends of the car torn apart for various repairs and upgrades. Not to mention all the cars that have been viewed on the assembly line at the factory. Someone would have seen it.
Also, see my crash-testing comment above. The pack would have to keep the car below it's DOT GVWR to not trigger new rounds of crash-testing. Someone did the math that a battery of such low weight would provide negligible range.
jeff_adams
Member
This would be pretty cool. It also fits his comment " Recharge faster than filling a tank with gas."
You want a conspiracy theory? - there's a high-density range-extending battery already in the car's architecture that maybe needs to be changed out after 1000 or 5000 miles or so after the recharging degrades- I know I'll get a thousand replies as to why this is not possible, and I don't know enough about batteries to know if it is, so I can dream. But it would truly be "under your nose" and a hell of a lot more compelling to me than swapping the main battery.
mitch672
Active Member
Yeah, but in the later tweets he says "battery pack swap"...
You are taking it literally, word for word.
Is not moving the electrons from a bank of battery packs into your pack technically "swapping"?
You are swapping electrons, not the pack itself.
Raffy.Roma
Rome (Italy)
So it's not a real battery swapping but a faster way to charge. I knew that already supercharger made a fast DC recharge. Maybe that there is a better point in the Model S where if you make a DC recharge it charges even faster?
Wild-ass-idea: what about liquid electrolyte? Drain out discharged electrolyte, fill in the charged one.
A few problems:
- Current Li-Ion cells don't work this way
- I don't see how this would be faster than filling a gas tank. Maybe similar speed, but not faster.
Non-obvious technology... what can we come up with? Self-swappable battery is a cute non-obvious proposition but still rather complicated/expensive.
A few problems:
- Current Li-Ion cells don't work this way
- I don't see how this would be faster than filling a gas tank. Maybe similar speed, but not faster.
This ain't news - removable battery was announced when they first announced Model S.
Non-obvious technology... what can we come up with? Self-swappable battery is a cute non-obvious proposition but still rather complicated/expensive.
deonb
Active Member
Elon currently live on Reuters:
http://insider.thomsonreuters.com/l...lOWFiMC01MzMxLTRjMTYtYmRlZS05MjNlMWFhZjgwZmM=
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Elon: "Depending upon what the level of demand is for battery pack swap, we'll have swap capability everywhere where we have SuperChargers"
How much would it cost:
Elon: Can't let the whole cat out of the. Talk about the economics about this Thursday night. I think it will be compelling?
Will this represent a substantial capital investment for Tesla?
Elon: It will cost a few hundred million dollars to roll this out across the whole country. So it's not substantial but not pocket change.
http://insider.thomsonreuters.com/l...lOWFiMC01MzMxLTRjMTYtYmRlZS05MjNlMWFhZjgwZmM=
- - - Updated - - -
Elon: "Depending upon what the level of demand is for battery pack swap, we'll have swap capability everywhere where we have SuperChargers"
How much would it cost:
Elon: Can't let the whole cat out of the. Talk about the economics about this Thursday night. I think it will be compelling?
Will this represent a substantial capital investment for Tesla?
Elon: It will cost a few hundred million dollars to roll this out across the whole country. So it's not substantial but not pocket change.
bollar
Disgruntled Member
Wow. That answered all the questions... Tesla will build it if there's demand -- one at each SC station, if there's demand. Cost to do at every SC $50-100MM. Some cats left in the bag until Thursday.
I dislike the 'classic' concept of battery swapping (taking the battery pack out and putting another one in). I will not use it and I think Tesla will not use it either.
deonb
Active Member
For sure $50m to $100m? I heard "few hundred" but I admit my speaker quality is poor.
bollar
Disgruntled Member
Well -- that's what I heard. He immediately followed with, "that's not much." But what is a lot of $ to a multi-billionaire? Hopefully we'll be able to watch the interview in its entirety soon.
Actually this group of reporters are very well prepared. The questions are interesting and pertinent.
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FYI Tesla didn't pioneer the battery-swapping idea either. Go study the electric vehicle industry journals and conference proceedings from years before Tesla was founded.
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