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Super-fast EVCPs?

Chris Pearson
I don't think that I have seen this in here before, but these batteries came up in a motoring forum.


The claim to charge an EV all the way in 5 min seems to be entirely spurious - all that they have managed so far is a moped, but even if the batteries existed, how would they be charged?


Here is my back-of-a-fag-packet calculation. An average EV will do 4 - 5 miles per kWh; let's be conservative and say 4. So with a range of 300 miles between charges, that requires 75 kWh. Delivered over 1/12 hour that requires 900 kW. So in round terms, that is one 1 MVA transformer per EVCP. Could be useful on a motorway, but I cannot see the point elsewhere. Even then, very few journeys in UK are over 300 miles. Both Edinburgh and Land's End are closer to Birmingham than that.


900 kW at 48 V DC is almost 20,000 amps. What sort of connexion is envisaged?
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  • 0
    P - Yes that could work quite well I think ?.


    The street I live in has 30 or so houses and I am the only one with solar panels.  Most of the people who live in the street still have to go to work for a living (not me i am too old!).


    If I had an electric car I would want to charge it at home and I suspect most of the other people in the street would want to do the same.  So we all install 7kW chargers and the 2 to 4 kW per dwelling that the DNO allowed when these houses were built goes out the window.


    I am sure that, given the will, the required energy to power all of the cars in the UK could be obtained from renewable energy.  Especially if we made use of the fact that we live on a shelf on the east side of the Atlantic Ocean and we get a tidal pulse twice a day which flows round the country in two directions - giving us tidal peaks that occur at different times around the coast.  All of this regardless of the weather.


    I can also believe that we could reinforce the national grid to deliver this energy around the country.  


    The bit I don't get is digging up every residential street in the country to reinforce the DNOs networks so that energy becomes available in my street.


    Hydrogen has much to commend it and, given enough development, could provide realistic long term solution.


    Regards


    Geoff Blackwell 

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  • 0
    P - Yes that could work quite well I think ?.


    The street I live in has 30 or so houses and I am the only one with solar panels.  Most of the people who live in the street still have to go to work for a living (not me i am too old!).


    If I had an electric car I would want to charge it at home and I suspect most of the other people in the street would want to do the same.  So we all install 7kW chargers and the 2 to 4 kW per dwelling that the DNO allowed when these houses were built goes out the window.


    I am sure that, given the will, the required energy to power all of the cars in the UK could be obtained from renewable energy.  Especially if we made use of the fact that we live on a shelf on the east side of the Atlantic Ocean and we get a tidal pulse twice a day which flows round the country in two directions - giving us tidal peaks that occur at different times around the coast.  All of this regardless of the weather.


    I can also believe that we could reinforce the national grid to deliver this energy around the country.  


    The bit I don't get is digging up every residential street in the country to reinforce the DNOs networks so that energy becomes available in my street.


    Hydrogen has much to commend it and, given enough development, could provide realistic long term solution.


    Regards


    Geoff Blackwell 

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