Battery Electric Vehicle News / Enjoying the Transportation Revolution

NigeWick

Martyn1981 wrote: »

News/plans from Kia.

Just keeping up their high profit margin on ICE as long as they can.

ABrass

buglawton wrote: »

This was in the news over a week ago.
https://www.itv.com/news/2020-01-17/wireless-charging-for-electric-taxis-to-be-launched-in-uk-first/


Which led me to thinking: How efficient is wireless charging vs plug-in? Surely there's a fair bit of energy loss?

About 90% or more apparently.

https://www.google.com/amp/s/cleantechnica.com/2018/01/28/wireless-charging-myths-exploded-witricity-ceo/amp/

Demonstrated at 97% efficiency in 2018.

https://www.google.com/amp/s/insideevs.com/news/340478/120-kw-wireless-charging-proves-97-efficient/amp/

So pretty darn efficient. Which surprised me.

EVandPV

ABrass wrote: »

About 90% or more apparently.

https://www.google.com/amp/s/cleantechnica.com/2018/01/28/wireless-charging-myths-exploded-witricity-ceo/amp/

Demonstrated at 97% efficiency in 2018.

https://www.google.com/amp/s/insideevs.com/news/340478/120-kw-wireless-charging-proves-97-efficient/amp/

So pretty darn efficient. Which surprised me.

Now that is impressive !

ABrass

The witricity link is probably the most relevant as apparently that's they technology the taxis will be using.

JKenH

Maybe While they are developing a common standard they can incorporate some technology that fries ICE electrics if they park in the wireless charging bays.

zeupater

JKenH wrote: »

Plug-in postcodes: Locations where demand for electric cars rose the most last year and regions best served with public charge points


https://www.thisismoney.co.uk/money/cars/article-7886643/UK-locations-electric-car-demand-boomed-2019.html

While EV registrations rose by as much as 500% in some areas, surprisingly in others, they actually fell by as much as 78%. Birmingham saw the biggest rise in EV registrations and no doubt as a consequence we see West Midlands is now at the bottom of the charts when it comes to chargers per vehicle.

Could the imbalance between charging points and EVs start a negative feedback loop? With an abundance of chargers EV take up will improve but if roll out of chargers doesn’t respond will new EV entrants be deterred?

Hi

Be interesting to look for a correlation between the areas highlighted and the location of lease companies and their preferred suppliers -probably not something that the article authors thought about !!

Example ... Jaguar manufacturing base area = Birmingham / Large lease company based locally in Birmingham to service manufacturer contract / Leased vehicles purchased & registered by lease company, guess where! / Lease company delivers to customers nationwide !! .... would this not explain the anomalies that the author highlights and show that there's no evidence of actual disconnect between charger & vehicle distribution?

HTH
Z

buglawton

ABrass wrote: »

About 90% or more apparently.

https://www.google.com/amp/s/cleantechnica.com/2018/01/28/wireless-charging-myths-exploded-witricity-ceo/amp/

Demonstrated at 97% efficiency in 2018.

https://www.google.com/amp/s/insideevs.com/news/340478/120-kw-wireless-charging-proves-97-efficient/amp/

So pretty darn efficient. Which surprised me.

Meanwhile Seville's trams charge for 15 seconds at each stop via a rising and falling pantograph. Thus the city dispensed with it's overhead cables which were causing a lot of headaches with maintenance and management of other street repairs and public events. They've had this since 2011.
https://www.reddit.com/r/mildlyinteresting/comments/bcos8u/trams_in_seville_spain_have_fast_charging/

I guess this makes Manchester's and Edinburgh's tram systems look positively antiquated.

Martyn1981

ABrass wrote: »

About 90% or more apparently.

https://www.google.com/amp/s/cleantechnica.com/2018/01/28/wireless-charging-myths-exploded-witricity-ceo/amp/

Demonstrated at 97% efficiency in 2018.

https://www.google.com/amp/s/insideevs.com/news/340478/120-kw-wireless-charging-proves-97-efficient/amp/

So pretty darn efficient. Which surprised me.

Did not expect that. Thanks.

Bit of 'back of the memory news', I recall watching or listening to something about the testing of wireless charging whilst mobile. I think it was in France, but again only a vague recollection.

But what was particularly interesting was that they hoped to scale it up to 7kW+, which is an interesting figure for city driving since it roughly matches consumption (7kWh = 28 miles = ~30mph).

No idea if this is viable, cost effective etc. etc., but it solves the issue of finding a charger and charging times too.

EVandPV

GreatApe wrote: »

Ridiculous waste of taxpayers money
Wireless charging offers nothing but inefficiencies

Yet another mistruth kicked into touch ! :cool:

buglawton

EVandPV wrote: »

Now that is impressive !

Reading into the topic in more detail, seems you have to consider the circuit losses when converting to wireless-AC and back to what the car charging circuit needs.

I have a feeling that the 97% is the pure transfer efficiency which does not account for pre and post processing losses.