Battery based electric vehicles of today and tomorrow.

[Grumpycat]

from what I can find, seems to be limited to ~ 11kw under SAE J2954

SAE J2954 - Wikipedia

the article does say a scaled up standard is being worked on- defined under WPT9

J2954/2 for 500 kW charging for heavy-duty vehicles which will require more space for the induction plate

Mmm doesn't actually seem practical yet for trying to full charge from a low state while on the road does it.

The article also mentions charging efficiencies of 85% which is well below where WiTricity is today.

Wiki says "up to" but isn't saying what the cited system is really doing at the claimed efficiency.

Say you are delivering 11 kW to the EV at 92%, that means 12 kW from the grid and 1 kW of heat which is the size of a common portable electric heater, all for a minor convenience. Gale, when you started this thread you were hyper sensitive to the "terrible waste of energy" from internal combustion engines. But this needless waste for wireless charging is acceptable? All to save 15 seconds to plug in, and another 15 seconds to depart?

A Watt or two is a small price to pay for convenience charging one's cellphone. But when dealing with 30 kWh to 100 kWh batteries an 8% loss is significant when it is so easily avoidable.

 

[Gale Hawkins]

Wiki says "up to" but isn't saying what the cited system is really doing at the claimed efficiency.

Say you are delivering 11 kW to the EV at 92%, that means 12 kW from the grid and 1 kW of heat which is the size of a common portable electric heater, all for a minor convenience. Gale, when you started this thread you were hyper sensitive to the "terrible waste of energy" from internal combustion engines. But this needless waste for wireless charging is acceptable? All to save 15 seconds to plug in, and another 15 seconds to depart?

A Watt or two is a small price to pay for convenience charging one's cellphone. But when dealing with 30 kWh to 100 kWh batteries an 8% loss is significant when it is so easily avoidable.

It seems like a life time ago when I started this thread and was not an EV owner.

Waste is waste. I have found the Energy usage screen on the Leaf after I got the 2020 33% larger 40 kWh battery and I run it all of the time vs. the default Navigation screen. Yesterday I slowed the rate of the wipers to use less battery power.

Elon Musk Shares History Of Tesla Battery Modules & Why They Are Going Away

The video in this article made Feb 2020 was helpful in understanding why Telsa has stayed on track moving forward in making EV's when it seems like Nissan Leaf stopped in the pits another battery but just got stuck there. In the video Elon talks about the painful lessons from building the 2500 Roadsters more or less by hand. In hindsight I think Elon learned more from that project than Carlos did building 400,000 Leafs.

Tesla Roadster (28) - Wikipedia

 

[herm0016]

I asked you . How much power can this pumped system supply ? How many of these pumped systems are required to store power to make wind and solar possible to power the country 24/7.

List of pumped-storage hydroelectric power stations - Wikipedia

plenty of pumped storage around the Rockies as well. been there for a while, and more is planned.
drive by this one sometimes.
Cabin Creek Generating Station | Xcel Energy

also plans for more in AZ and Montana

 

[Gale Hawkins]

VW and helping EV charging in the USA. EA is using WalMart parking lots along the Interstates in our area base on what I have seen or used.

VW's $2 billion penalty for diesel scam builds EV charging network across US

 

[Grumpycat]

VW and helping EV charging in the USA. EA is using WalMart parking lots along the Interstates in our area base on what I have seen or used.

VW's $2 billion penalty for diesel scam builds EV charging network across US

Yes, disgusting. And EA's rates are as high as any.

 

[TheGoose]

Well two weeks ago my father in law (78 yo) bought a new EV...a Chevy Bolt. The car cost just over $30k with a $1800 federal tax credit yet to be taken.

It has a ~65 kWh battery. So far he’s averaging 8 miles per kWh. Ill admit he drives really easy and slow. Most people get 3-4 miles per kWh. I calculate that every 100 miles he uses 12.5 kWh . At $.10 per kWh it costs $1.25 in electricity. The indicated range is over 300 miles at this range. So far he’s very happy with it.

 

[Gale Hawkins]

Well two weeks ago my father in law (78 yo) bought a new EV...a Chevy Bolt. The car cost just over $30k with a $1800 federal tax credit yet to be taken.

It has a ~65 kWh battery. So far he’s averaging 8 miles per kWh. Ill admit he drives really easy and slow. Most people get 3-4 miles per kWh. I calculate that every 100 miles he uses 12.5 kWh . At $.10 per kWh it costs $1.25 in electricity. The indicated range is over 300 miles at this range. So far he’s very happy with it.

That is an amazing story at his age getting the longer range new Bolt and at a good price. Is this his first EV?

My range with our new 40 kWa Leaf battery I get a range of 90-170 miles depending on how I drive and how long I preheat on a 14F morning to melt off the windows. EPA calls it a 150 mile range car but those wide open take offs sucks a lot of juice out of the battery.

 

[Grumpycat]

Well two weeks ago my father in law (78 yo) bought a new EV...a Chevy Bolt. The car cost just over $30k with a $1800 federal tax credit yet to be taken.

It has a ~65 kWh battery. So far he逞ｴ averaging 8 miles per kWh. Ill admit he drives really easy and slow. Most people get 3-4 miles per kWh. I calculate that every 100 miles he uses 12.5 kWh . At $.10 per kWh it costs $1.25 in electricity. The indicated range is over 300 miles at this range. So far he逞ｴ very happy with it.

Great! But the car displays power drawn from the battery, not the power drawn from grid to charge the battery. Batteries are not 100% efficient, they get warm when charged and get warm again when discharged. Also the charger/inverter gets warm converting AC to DC at a useful voltage for charging.

As you say, 8 miles per kWh is 12.5 kWh per 100 miles. Thats so good as to be in the fantastic range as EPA rating is 29 kWh per 100 miles. The EPA measures power from the grid which is usually around 20% greater than the power drawn from battery.

10¢/kWh and 29 kWh/100miles is 2.9¢/mile. If gasoline was $2.90/gallon then his MPG$ would be 100. That is to say his Bolt costs same to drive as 100 MPG. Gasoline hit $2.049 here today which works out to a still excellent 70 MPG$.

 

[Gale Hawkins]

One year with the Chevrolet Bolt EV: Takeaways from my immersion into all-electric driving – GeekWire

I have never seen a Bolt but then I have only seen one white and one gray Leaf to recognize them. Sounds like a Bolt can serve as the only family car. Renting a gas car seems to solve really long trips concerns.

 

[California]

Stored energy - heres a new article on a just-approved project. Hopefully this will be online this year.

Humongous Tesla Battery Plant Approved In California Is 10x Bigger Than Worlds Biggest Battery Plant

=== excerpts ===

"...10x bigger than Teslas Hornsdale energy storage project (1.2 GWh versus 129 MWh), which was 3x bigger than any other battery storage facility at the time it was built."

and

"In 2018, it was reported that the battery at Hornsdale made back a third of its cost in a year".