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Auto Makers Announce Electric Car Charging Standard
Overly Critical Guy writes "Auto makers are launching a universal EV charger that charges an electric vehicle in 15 to 20 minutes. The standard, called Combined Charging System, has been approved by the Society of Automotive Engineers and ACEA, the European association of vehicle manufacturers, as the standard for fast-charging electric vehicles."
Often when it comes to fast charge solutions, the quoted time is to reach 80% charge. The remaining 20% usually take a relatively long time because it's slower to charge a battery that's almost fully charged. You can see this in action pretty clearly if you own a laptop.
Valid question. But for something like the Volt, they only operate the battery from ~30% capacity to 80% capacity, which means you can fast charge a "full charge". Most batteries don't have to slow the charging until somewhere over 90% capacity.
Better question is how many KWh can it deliver in 15 mins? Since vehicle battery capacities vary significantly, that's the relevant question.
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And predictably, the only 2 major players in the EV market now, Nissan and Mitsubishi, will just stick to the only widely-deployed fast-charge connector to date, CHAdeMO http://www.chademo.com/
By announcing this new American-only Frankenplug, the SAE only helps delaying the (IMHO much-needed) EV adoption in the US and related charging infrastructure. But that's probably exactly what Chrysler & Co want, so they have more time catching up with the Japanese automakers...
It's too late. All the Japanese manufacturers standardized on CHAdeMO for charging.
According to http://news.cnet.com/8301-11128_3-57427823-54/automakers-heres-how-well-charge-evs-in-15-20-minutes/ it is rated at 500 volts at 200 amps. So the total KWh for fifteen minutes would be 25.
3. It isnt that hard, there are already prototypes. We refill flying planes with other flying planes and you think this is 'far from simple?
Aerial refueling is far from simple, but it is performed by highly trained operators in billion dollar equipment. And you use that to justify why installing 100,000 battery changers, performing hundreds of millions of changes a year, operated by idiot consumers with cheap vehicles is somehow easy? You might as well say "We put a man on the moon, why don't we all travel in miniature scramjet pods?"
etc etc etc please do go on, the one and only problem is getting an entire nation to roll out stations which is expensive with a slow return on investment and getting auto manufacturers to standardize batteries.
So the only problems are that the infrastructure is too expensive to be profitable and the vehicles are too expensive to be profitable. Sure, that sounds totally viable in a free-market economy. /sarcasm.
Why are people so obsessed with having gas stations for electric cars? That defeats the whole purpose. Charge the car at home and at work, like your smartphone. No trips out of your way, no cruising for the cheapest price, no waiting by the pump, just a few seconds before and after to plug/unplug. If you need to go long distance, take a train/plane/bus, enjoy the view and relax for once in your life. And if your commute is too long, then you're not in the target demographic anyways.
For the cost of installing battery-swap infrastructure in a handful of locations, we could cover a city with standard charging stations. Then you could charge no matter where you park. Even installing networks of the fast-chargers on major corridors will end up being cheaper and more versatile.
Besides, you've seen how long it took them to agree on a standard for a charging plug. Just think how long it would take them to agree on standards for whole battery packs. By the time they finish, we'll have 400-mile Litihium-Air batteries and hydrogen fuel cell backups, and no one will care anymore.
You're calculations are wrong. If the volt used 110kw to run at 80MPH, it would drain it's 16kwh battery pack in about 6 minutes, giving it a range of about 11 miles.
If you use this website
http://www.wallaceracing.com/Calculate%20HP%20For%20Speed.php
And plug in the relevant numbers for the volt (0.28cod, 25 sqft frontal area, ~3800lbs) you'll see that the volt only consumes around 24kw cruising at 80MPH.
The main reason cars have multiple hundred horse power engines is because acceleration is power demanding.
I own a LEAF, and I've heard no such recommendation. They recommend against multiple quick charges per day, but I haven't seen anything about twice a month. You don't want to put the battery through a quick charge when the batteries are real hot, but a battery pack is not going to hold heat for multiple days. Sorry, the thermal mass isn't that high.
Now, they do tell you that the less you quick charge, the longer your battery will last. They say that regular quick charging will leave you with 70% capacity after 8 or 10 years (I can't remember the quoted "lifetime"), and 80% capacity at "end of life" if you don't quick charge, but just use 110V trickle charging and 220V normal charging.
That's not exactly frying your batteries early.
Don't hold your breath on your non-RTFM scenario, dude. First of all, EV owners know the dominant strategy for charging is always going to be charging at home. Very few people are going to be doing a lot of quick charging (maybe cab drivers?). Quick charging is likely to be significantly more expensive per kWh than charging at home, and people just don't buy LEAFs if they do a lot of long-distance (100 miles+) driving. If they did, they'd but a Volt.
...it is even possible to do it manually (using a gas canister) if car ran out of gas before you reached the station.
Do you have a citation for that assertion or are you just making that up?
You want a citation for "carrying a spare gallon of fuel in a fuel can in the trunk"?
Jesus. What are you, a wikipedia editor?
Electric vehicles use zero power while stopped, and damned little while moving slowly in stop-and-go with regenerative braking. It's maintaining the highway speeds that kills the battery faster. This isn't like an internal combustion engine, which makes peak efficiency at more-or-less highway speeds and wastes power idling in traffic.
So, your commute was about a mile and a half each way? Would you even bother driving that kind of distance?
In parts of the world there is no alternative. I remember seeing a nice restaurant across a highway from a hotel in Texas once, and after wandering around for a bit I realised the only way to get to t was to get in the car, drive half a mile to an exit with a loop under, then drive back again.