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Tesla – Introducing V3 Supercharging

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Re: Tesla – Introducing V3 Supercharging

#121

Post by kumarvvr »

Carioca wrote: post #52
Carioca wrote: post #42

Earlier quoted context omitted.

Have you ever considered how much chemical energy is flowing through the gas pump when you fill up a car?

I got curious and did the math: US gas pumps do 10 gallons per minute, which give us 0.61 L/s. Density is about 0.7kg/L, energy content is about 46.7 MJ/kg. Multiplying the three we get juuust under 20MJ/s or 20MW or about 80 times more energy than this kind of electric charger

Whoa. That is a lot of efficiency with EVs. But then, that electricity, when coming from a coal powered plant means that the overall "earth to wheels" energy efficiency is somewhere around 30%.

Re: Tesla – Introducing V3 Supercharging

#122

Post by kumarvvr »

chubbyrabbit wrote: post #5
leesec wrote: post #2

The amount Elon has delivered so far this year alone at Tesla and SpaceX is tremendous then you see a headline where he landed a 50+ million tunneling deal on the side because why not. Staggering.

His companies delivered, not him alone. Take nothing away from the man though, he works insane hours.

He sets the vision and drives the team.

Reminds me of a recent story about the most recent rocket engines from SpaceX. Elon pushed his team for scaling up an efficient design of rockets, which till then was only done with lower powered engines. Elon took a look at the tech, came to a decision that scaling up is a reasonable risk/reward trade-off and demanded his team go ahead with it. His team balked, but made it happen.

I remember the leader of the team specifically thanking Elon, saying that without his push, they would not have done it.

It takes a lot of guts, knowledge and confidence in yourself and your team to make such decisions. edit : https://news.ycombinator.com/item?id=19153953

Re: Tesla – Introducing V3 Supercharging

#123

Post by natch »

beefman wrote: post #97

I'll not take another road trip in my Tesla after dealing with the complete lack of bathrooms between San Jose and Davis -- including at Tesla Livermore which 1. shouldn't really have been closed at that hour and 2. should leave their bathrooms open after they close and 3. there's no excuse for not providing bathrooms at every supercharger station. Oh yeah, and we only put on about a mile a minute despite the charger…

Sounds like you are just starting out and making newbie mistakes with charging. Join the Tesla Slack and you might get some help with that.

Re: Tesla – Introducing V3 Supercharging

#124

Post by EngineerBetter »

Reason077 wrote: post #119
matahwoosh wrote: post #102

Earlier quoted context omitted.

Tesla Semi has multiple packs that can be charged in parallel. The Megacharger will (likely) be 4 Superchargers combined. 1MW should be enough ;) re: announcement, I'm surprised not much has been said about the flagship cars (S/X). With their current battery architecture (using 18650 batteries), they're not capable of 250kW charge rates. I wonder if they have recently updated them to new 2170 battery packs or if they…

Elon said specifically on the most recent Tesla conference call that there are no current plans for 2170-based packs on the Model S & X.

Folks are speculating that a Model S/X refresh will be announced at the end of the Model Y unveiling next week.

It'd make sense, as both have had massive price drops recently, and haven't had a battery upgrade in two years.

Re: Tesla – Introducing V3 Supercharging

#125

Post by natch »

scarlac wrote: post #53
mixmastamyk wrote: post #29

Earlier quoted context omitted.

Is privacy an option yet?

You'd have to be more specific than that. You can disable data sharing if you prefer.

"Data sharing" is pretty vague but assuming you are talking about car data, it's completely decoupled from the VIN or any other identifiers that could ID you, so disabling it is just silly, but yes you can choose to not opt in.

Re: Tesla – Introducing V3 Supercharging

#126

Post by scarejunba »

cma wrote: post #28

The much bigger news is they completely walked back FSD (full self-driving) into something that you have to monitor at all times by changing the description on their website. The release of a proprietary charger is somehow completely overshadowing that news. It's changed from driving itself around in a ride hailing network to earn you money while you sleep, to now making you always be in the car and pay attention and…

Honestly, every time I read the "you're turning me into someone working to train your program without paying me!" comment I think about this stuff and I realize no one I know would give a goddamn fuck and expect to be paid in cash. Having the better product is sufficient.

Re: Tesla – Introducing V3 Supercharging

#127

Post by Reason077 »

HALtheWise wrote: post #114
dreamcompiler wrote: post #78

Earlier quoted context omitted.

Which implies that Tesla is either using a much higher voltage than 250, or they're using superconductors. And I doubt they're using superconductors.

The Tesla supercharging cables are pretty short, so they can also tolerate the higher losses associated with a thinner cable. They were even experimenting with a liquid cooled cable at one point in order to get thinner conductors and a more flexible cable by allowing to to be less efficient.

The experiment must have been a success, because the v3 supercharger uses liquid-cooled cables.

In fact, it is becoming standard in high-power chargers, with the new 175-350kW CCS units also using liquid cooling.

Re: Tesla – Introducing V3 Supercharging

#128

Post by natch »

simonjgreen wrote: post #99

Fantastic tech. However, why do they insist on doing it in a closed proprietary way? Teslas growth is coupled to general EV growth. They can't possibly be arrogant enough to believe they will be the sole supplier of EVs if they win can they? Charging is the number 1 thing holding back adoption right now.

Tesla has repeatedly offered access to their supercharging network to any car company that wants to use it, but nobody has taken them up on it.

Re: Tesla – Introducing V3 Supercharging

#129

Post by masonic »

pkaye wrote: post #117
masonic wrote: post #111

Earlier quoted context omitted.

Have they obtained all necessary rights-of-way? I'm having trouble picturing a route that doesn't transit protected desert areas.

Its just a underground tunnel that connects some exhibition halls with people movers. I think Elon's company got the lowest bid to do the work.

Sorry, in seeing "Vegas" I assumed that it would be traveling from Vegas to somewhere else, like L.A.

Re: Tesla – Introducing V3 Supercharging

#130

Post by rypskar »

bonzini wrote: post #105
dreamcompiler wrote: post #72

Earlier quoted context omitted.

My house has 200 Amp service. But I never use that much at once. The average US home uses an average of about 1.2KW at any given time [0]. So I was wrong above. It's more like 200 houses. [0] https://www.eia.gov/tools/faqs/faq.php?id=97&t=3

Isn't that a waste of copper? My house has about 20 Amps (3.3 kW at 230 V).

Are you sure your intake fuse is only 20A? Where I live it is normal for each circuit to have 16A, and if you have induction stove at least 20A for it. My intake fuse is only 55A (230V) since I have an old house, but should be upgraded
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