It's hard to see how you can ever get 10 minute charging in a 400 mile range car. That's 750kW or so, in which case the limiting factor will be how you dissipate ~75kW of waste heat from the pack during charging.
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It's hard to see how you can ever get 10 minute charging in a 400 mile range car. That's 750kW or so, in which case the limiting factor will be how you dissipate ~75kW of waste heat from the pack during charging.
deonb
Active Member
Liquid Nitrogen.
Except then inevitably two years later Elon would be sending out notes that folks aren't really suppose to take the Liquid Nitrogen home to make ice cream. And then people will be upset that this wasn't explicitly stated as a policy from the beginning.
So there's that.
Cottonwood
Roadster#433, Model S#S37
See Supercharger - Mountain View, CA (Went LIVE on 06-09-2015) - Page 13 for my guesstimate for about 300 Watts dissipated in the new cables or about 0.25% of 120 kW.
Also thinking about momentary grid demands. Thinking that local battery packs would be part of the quicker charging solution so that the grid only needs charge the intermediate pack at slower rates when no cars are hooked up.
mgboyes, I'm just going on what JB said in July 2013, “It’s not going to happen in a year from now. It’s going to be hard. But I think we can get down to five to 10 minutes,” It may be that he was speaking in terms of the original ~250 mile car, but he said 5-10 minutes... so 10 minutes on a 400 mile car doesn't seem out of scale.
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From the article upthread:
"Achieving five-minute charges will require not only further improving the charging system, but also improving the interface with the electrical grid. As it is, only some places on the grid can handle 120-kilowatt charging. Drawing large amounts of power from the grid also incurs demand charges from the utility, increasing the cost of the system.
But Straubel says that Tesla plans to get around these problems by equipping supercharging stations with solar panels and batteries.
Storing solar power in batteries in the charging station could also be helpful to operators of the power grid..."
One of the thoughts I've had is around main pack contactor replacement. The failing contactors would weld themselves closed due to the heat generated from things like high speed runs and Supercharging. The new contactors are a big improvement over the old ones. This should allow (given the proper battery cooling) for higher Supercharging rates, say up to 140kW. From what I've seen inside Supercharger cabinets, there is room for two more chargers to take them from 120kW to 140kW. The liquid cooled cables/handles will be great for this, especially in the summer.
As for the concern about air flow and filters of the pedestal heat exchangers, this could be monitored with a vacuum sensor on the inlet side. If the negative pressure starts to increase, that means the filter needs cleaning/changing. This could easily be messaged back to HQ.
As for the concern about air flow and filters of the pedestal heat exchangers, this could be monitored with a vacuum sensor on the inlet side. If the negative pressure starts to increase, that means the filter needs cleaning/changing. This could easily be messaged back to HQ.
roblab
Active Member
Of course, people were having trouble seeing anybody come up with an electric car that looked good, drove fantastic, and had 300 miles of range. I bet if anybody can do it, Tesla will be right there.
In another ten years, it will be no big deal.
Two questions:
1. Since the 9 June opening of the Mountain View SpC, nine other SpCs have come into operation. Are any of them sporting the new cables?
2. To those who have used the new cables: do you notice any diminution of temperature at the contactor-handle? Is anyone aware as to where the coolant flow terminates?
1. Since the 9 June opening of the Mountain View SpC, nine other SpCs have come into operation. Are any of them sporting the new cables?
2. To those who have used the new cables: do you notice any diminution of temperature at the contactor-handle? Is anyone aware as to where the coolant flow terminates?
It was reported elsewhere that the new cables are being tested at Mountain View for at least six months, close to home, they're not for routine installation yet.
Khatsalano
Member
I just tried the cables yesterday in Mountain View on my way back from Monterey. They are incredibly easy to handle. They are even more flexible than my HPWC cable. The upcoming San Mateo SC (just a couple miles north) have the traditional snake.
The massive snake felt substantial, but I think I'm convinced-- the new cable is much more user-friendly. The vents on the bottom of the pedestals look neat too.
The massive snake felt substantial, but I think I'm convinced-- the new cable is much more user-friendly. The vents on the bottom of the pedestals look neat too.
Khatsalano
Member
@Chris, don't worry, I wouldn't do you like that. Here:
Supercharger - Mountain View (went LIVE on 06-09-2015) - Page 22
Supercharger - Mountain View (went LIVE on 06-09-2015) - Page 22
The coolant won't be water. Presumably it will be similar to the battery coolant. Even if not, it will still have some kind of antifreeze, and perhaps circulating continuously.
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