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"Tesla really shouldn't get involved with charging/swapping infrastructure stuff. Stick with the cars guys."
No, Tesla should be heading up the international standards for charging. We don't need competing incompatible charge stations again.
I'd say Tesla should partner with Shai at Project Better Place. Once there are thousands and thousands and tens of thousands of chargers in India, Denmark. Hawaii and San Francisco, the chargers will become the defacto standard.
The world loves to be deceived.
The reality is no new charging standards are really needed. We have our home 120/240V outlets. We only need to get the idea that we need quick charging out of our heads. We don't.No, Tesla should be heading up the international standards for charging. We don't need competing incompatible charge stations again.
Developement of such a standard and implementation of widely spread quick charging grid does not warrant the costs involved. How many people will use it and pay much higher price when they can charge at home over night?
Indeed, developing such quick charging grid could mean some car maker will stop offering homecharging capability. And we do not want that to happen.
I believe in Tesla as a concept, a brand, and a suite of products. No matter who conceived, started, runs, or maintains, I hope it ultimately prevails and lasts.
-- TEG
Well already the AC plugs worldwide are all different. It would be nice if the EV makers got their act together before they put out product.
I agree that the cars should plug in to standard plugs via adapters but remember that Tesla's charger has a lot of "smart" features with the power source talking to the car and Vice Versa. These safety measures are what I am talking about as much as the form of the plug/socket.
The world loves to be deceived.
By the way, the idea of a Tesla on the side of the road with a dead battery and another Tesla driving up and plugging in for a few minutes to charge the dead one is cool.
Makes me want to by two!
The world loves to be deceived.
Few minutes like 10 minutes? At 17kW that is 2,8kWh which is about 5% of maximum charge or about 10 miles of aditional range... in for a few minutes to charge the dead one is cool.
It sounds cool just as rocket belts sounds cool also. But both just do not work in practice.
I believe in Tesla as a concept, a brand, and a suite of products. No matter who conceived, started, runs, or maintains, I hope it ultimately prevails and lasts.
-- TEG
Exactly!Originally Posted by vfx
And yes "a few minutes" may be a bit optimistic, unless two Teslas connected can offer the (pointless?) Holy Grail of EV recharging - Ultra Fast. Make it a unique feature only available when two cars are connected. Additional selling point.
Battery cooling energy consumption will probably prohibit this, however. A bit embarassing if 10kWh delivery requires a further 20 kWh to stop both battery packs melting.
Last edited by malcolm; 07-20-2008 at 07:51 AM.
Damnit!
The more I look at this, the uglier it gets.
Suppose we want to deliver 10kWh of energy to the exhausted car (for ~40 miles driving). Taking one hour at 240 V means 42 Amps. But we know 70 amps requires 17kWh for cooling, so the exhausted car will require a further 42.5 Amps for cooling.
So apart from needing a new cable rated for 100 amps, the suppling car will need to give up 20.3kWh to the other car AND consume a further 20.5kWh of energy keeping its own battery cool.
So donating 10kWh in an hour to one car requires the sacrifice of 41kWh from the other.
Great. I have almost successfully stranded two cars instead of one!
Looks like V2V is a non-starter with present battery pack technology unless you are prepared to put up with recharge times of several hours! Not quite the emergency rescue I had in mind.
Last edited by malcolm; 07-20-2008 at 09:42 AM.
Why? Is something wrong with your rocket belt? Mine works fine!
The world loves to be deceived.
Perhaps the towable generator is the best option for a stranded car too... A service vehicle brings the t.g. to the stranded car, hooks it up, the tech says "Awlright guv'nor, give her 30 minits, an it's good, innit?"
Know wot I mean?
Chris H.
So Long, and Thanks for All the Fish.
I agree, but this need for battery cooling makes 30 minutes very tough for a reasonably sized generator. People expect Emergency recovery time scales to be far lower than typical recharge durations. That's the problem here.
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