It is currently 28 Mar 2024, 21:14
sunnybob wrote:A few hours ago I was listening to the radio and a man was complaining about his battery car. He started with almost 300 miles in the system. but it was night and cold, so he had headlights, heating and all the rest on. He said for every 70 miles he drove the range dropped by a 100.......
sunnybob wrote:I appear to have mis worded that. He said the battery life reduced by the 70 he had driven, PLUS another 100.
70 travelled, range drops by 170.
Lons wrote:hopefully that can be solved with new generation battery technology. If that's wrong then feel free to refute it of course as I'm only going off what I've read.
Lons wrote:... get all the support structure in place, .....
Woodster wrote:Lons wrote:hopefully that can be solved with new generation battery technology. If that's wrong then feel free to refute it of course as I'm only going off what I've read.
That’s what the article is about.
“I think such fast-charging batteries will be available to the mass market in three years,” said Prof Chao-Yang Wang, at the Battery and Energy Storage Technology Center at Pennsylvania State University in the US. “They will not be more expensive; in fact, they allow automakers to downsize the onboard battery while still eliminating range anxiety, thereby dramatically cutting down the vehicle battery cost.”
Guineafowl21 wrote:Charging a 75 kWh battery in 5 minutes would require 75,000/(5/60) = 900 kW of power, or enough to run nine houses.
On single phase, that would draw 900,000/240 = about 3,750 A
On three phase, about 1,200 Amps per phase.
All assuming 100% efficiency. Staggering figures - I wonder how they will manage them?
9fingers wrote:Guineafowl21 wrote:Charging a 75 kWh battery in 5 minutes would require 75,000/(5/60) = 900 kW of power, or enough to run nine houses.
On single phase, that would draw 900,000/240 = about 3,750 A
On three phase, about 1,200 Amps per phase.
All assuming 100% efficiency. Staggering figures - I wonder how they will manage them?
Quite agree and anything much less than 100% conversion efficiency as a fraction of the 900kW will produce huge amounts of heat in the battery to be managed.
Bob
Woodster wrote:Rather than upsetting yourself you really should have just read the article.
AJB Temple wrote:It's pretty close to being here now (several around London for example). Tesla V3 superchargers can deliver a peak rate of 250Kw / hour. These are gradually being rolled out to extend the Tesla network. It will give a model 3 about 75 miles range top up in 5 minutes.
I've been running an electric model X for 3 years and the vast majority of my round trips are well under 70 miles, and I typically start every journey with a range of 300 miles shown (and realistically 250 without starting to feel anxious about range )
AJB Temple wrote:I do know that for a user a big number is better. So my home charger runs overnight during cheap rate electricity.
Guineafowl21 wrote:....
*** I got the figure wrong in my earlier post - 900 kW or that order would typically supply 90 houses, nominally at 10 kW each, or nearly 40 houses maxed out at 100 A. To charge one car.
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