Author Topic: Electric cars  (Read 693866 times)

sparky Paul

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Re: Electric cars
« Reply #1905 on: January 15, 2021, 02:55:44 PM »
Set temp before driving and the “idea” is that you won’t need to change it.

This is of course different in practice for some folk.

I'm not in the habit of fiddling with the temperature, but I do notch it up or down a degree or two occasionally.

Would you pull over to adjust cabin temperature, or turn on/off windscreen demisting, things like that? I don't think many would, and fiddling with a touch screen can't be conducive to safe driving.
« Last Edit: January 15, 2021, 03:09:28 PM by sparky Paul »

TiJazz

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Re: Electric cars
« Reply #1906 on: January 15, 2021, 03:55:02 PM »
Believe me, the demisting ability of a Tesla is so poor it’s better to just wait until the sun comes out before driving :p

sparky Paul

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Re: Electric cars
« Reply #1907 on: January 15, 2021, 04:02:55 PM »
Never had the pleasure (or otherwise) of driving a Tesla, but my first experience of fumbling about looking for heater controls on a touch screen was not a happy one - Peugeot.

TiJazz

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Re: Electric cars
« Reply #1908 on: January 15, 2021, 04:17:18 PM »
Don’t waste your time or money until they learn how to build a car and test their software (see my earlier posts!)

Jocko

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Re: Electric cars
« Reply #1909 on: January 15, 2021, 04:32:18 PM »
I see the furore about the roof rails on the MG5 has been sorted out. Initially, the brochure said they were rated at 50 kg then the brochure was changed, and they were for "decoration" only. This caused a bit of an uproar for those that bought the car to carry bikes and the like, but now they have been reinstated as load currying, albeit at a reduced 35 kg.

richardfrost

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Re: Electric cars
« Reply #1910 on: January 19, 2021, 04:30:30 PM »
100 miles worth of charge in 5 minutes by 2025 with existing charge infrastructure.

https://www.theguardian.com/environment/2021/jan/19/electric-car-batteries-race-ahead-with-five-minute-charging-times

madasafish

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Re: Electric cars
« Reply #1911 on: January 19, 2021, 06:09:48 PM »
100 miles worth of charge in 5 minutes by 2025 with existing charge infrastructure.

https://www.theguardian.com/environment/2021/jan/19/electric-car-batteries-race-ahead-with-five-minute-charging-times

 WIth a 50KWH battery, a 5 minute charge at 240V would be a current draw of 2,500 Amps.  Enough to melt all existing copper charging cables...

sparky Paul

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Re: Electric cars
« Reply #1912 on: January 19, 2021, 06:44:21 PM »
WIth a 50KWH battery, a 5 minute charge at 240V would be a current draw of 2,500 Amps.  Enough to melt all existing copper charging cables...

I think they are only talking about a partial charge, and superchargers are already operating at 480V... but that's still going to have to be bumped up to make this work.

Jocko

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Re: Electric cars
« Reply #1913 on: January 19, 2021, 07:05:06 PM »
I think they are only talking about a partial charge, and superchargers are already operating at 480V... but that's still going to have to be bumped up to make this work.
The batteries can be fully charged in five minutes but this would require much higher-powered chargers than used today. Using available charging infrastructure, StoreDot is aiming to deliver 100 miles of charge to a car battery in five minutes in 2025.

sparky Paul

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Re: Electric cars
« Reply #1914 on: January 19, 2021, 07:39:50 PM »
I think they are only talking about a partial charge, and superchargers are already operating at 480V... but that's still going to have to be bumped up to make this work.
The batteries can be fully charged in five minutes but this would require much higher-powered chargers than used today. Using available charging infrastructure, StoreDot is aiming to deliver 100 miles of charge to a car battery in five minutes in 2025.

What i meant to say, to make the 5 minute full charge work. Certainly technically possible, and of course charging systems don't have to involve cables.

culzean

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Re: Electric cars
« Reply #1915 on: January 19, 2021, 08:03:56 PM »
I think they are only talking about a partial charge, and superchargers are already operating at 480V... but that's still going to have to be bumped up to make this work.
The batteries can be fully charged in five minutes but this would require much higher-powered chargers than used today. Using available charging infrastructure, StoreDot is aiming to deliver 100 miles of charge to a car battery in five minutes in 2025.

What i meant to say, to make the 5 minute full charge work. Certainly technically possible, and of course charging systems don't have to involve cables.

Inductive charging is inefficient with up to 45% extra power being drawn to supply same amount of power as a cable. The two inductive coils need to be as close as possible, and still need to carry same or more current than a cable.  Inductive charging is basically an air cooled transformer - iron cored transformers are very efficient, but not air cored.  Higher frequency helps to improve efficiency of air cored transformer but that means BEV and chargers become even more expensive..
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

sparky Paul

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Re: Electric cars
« Reply #1916 on: January 19, 2021, 08:23:31 PM »
Inductive charging is inefficient

Who said anything about inductive charging?  ;)


https://core.ac.uk/download/pdf/53025466.pdf

Eventually, I can see some sort of standardised robotic charging connection which connects underneath the car, directly to the battery pack. The danger of human contact with high voltage charging is reduced, the charging cabling in the car is eliminated, and the size of the conductors on the charging infrastructure can be significantly increased.

I've no doubt someone will come up with a solution, necessity is the mother of invention.
« Last Edit: January 19, 2021, 08:42:34 PM by sparky Paul »

richardfrost

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Re: Electric cars
« Reply #1917 on: January 19, 2021, 08:43:13 PM »
Really helps if you read the article before making assumptions. The company making this battery tech are talking to BP about how to make their tens of thousands of filling stations obsolete.

sparky Paul

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Re: Electric cars
« Reply #1918 on: January 19, 2021, 08:54:24 PM »
As it says, "batteries are the new oil".

culzean

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Re: Electric cars
« Reply #1919 on: January 20, 2021, 08:54:40 AM »
Many companies are fond of releasing 'breakthroughs' to tempt people to invest in the company,  it works for a while - until it all goes quiet.  They have also used graphene in batteries to allow them to be charged faster.
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

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