he Michelin radial 95/80 r16 radial is the tire used by solar racing
> teams. Anyone know where to get them? Lawrence Rhodes
> -- next part --
> An HTML attachment was scrubbed...
> URL: <
> http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/
Size: 801 bytes
Desc: Message signed with OpenPGP using GPGMail
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/2c431de5/attachment.pgp>
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/l
I'm guessing the author of the article didn't do his homework and probably
doesn't know the difference between energy and power.
If it's energy density, the figure is out of date -- modern 18650's are north
of 250Wh/kg.
If it's power density, the figure is just plain wrong, since that is equiva
On Apr 7, 2015, at 4:57 PM, Peri Hartman via EV wrote:
> Your needs may differ but, for me, unequivocally the charge time is more
> important.
I'm not discounting the importance of charge time. It's just my understanding
that the batteries today aren't the limiting factor in charging. Actually
On 7 Apr 2015 at 16:50, Ben Goren via EV wrote:
> and a 1-minute *dischargeable* battery. That's probably an even bigger deal
> than the charge time.
The only person I can imagine who might think that a one-minute discharge is
a big deal is a drag racer. The rest of us generally want to drive o
Your needs may differ but, for me, unequivocally the charge time is more
important. Consider at least 10:1 for charge:discharge and perhaps
even 100:1 as long as the battery can handle one or two minute bursts at
high current.
I want to pull into a charge station, get a full charge in 5 minu
On Apr 7, 2015, at 4:25 PM, Cor van de Water via EV wrote:
> Time will tell if we soon will have a 1-minute rechargeable battery
...and a 1-minute *dischargeable* battery. That's probably an even bigger deal
than the charge time.
Right now, charging times seem to be limited on all sorts of
David wrote:
>>...though perhaps you might have been more skeptical. ;-)
David,
Typical aluminum-air cells have a power density of around 60-70 W/kg, so
40 W/kg didn't seem out of line. To the contrary, it's the 3000 W/kg number
that seems awfully high.
Bill
___
Hi Bill,
Thanks for the references!
It makes no sense to expect batteries to charge fast and discharge slowly.
Typically the charging is not faster than the discharge.
More likely, they are talking about Alu cells available *now* that are 40W per
kg
versus the newer technology described in the Sta
Cor wrote:
> Who do you trust...
http://arstechnica.com/science/2015/04/flexible-aluminum-battery-charges-fas
t-stable-for-over-7000-cycles/ -- "But the fact that aluminum atoms only
transferred a single electron when they transited to the cathode is really
not taking full advantage of
I've no clue. I'm assuming they're making it using some sort of chemical
reaction, presumably one not entirely unlike those ones chemistry teachers love
to demonstrate with the carbon snakes boiling out of the beakers when they mix
two colorless liquids.
...I think I'm going to see if the resea
BTW,
Are you capable of making three-dimensional graphitic-foam?
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
www.proxim.com
This email message (including any attachments) conta
I do not have a Nature subscription
but I looked at the abstract again and noticed the pictures underneath.
Click on the first one, it shows the chemical formulas for the operation of the
cell
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_
On Apr 7, 2015, at 3:44 PM, Cor van de Water via EV wrote:
> the electrolyte is not specified other than the phrase "intercalation of
> chloroaluminate anions in the graphite"
I see that in the abstract...is that what you're referring to, or do you have
the full article?
I've asked a friend w
BTW,
Even the Nature article is contradicting itself because if the cell is 2V then
the following is wrong:
"affording charging times of around one minute with a current density of ~4,000
mA g-1 (equivalent to ~3,000 W kg-1)"
Because 4A per gram is only equivalent to 3kW per kg at 0.75V
Cor van
Ben,
the electrolyte is not specified other than the phrase "intercalation of
chloroaluminate anions in the graphite"
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
www.proxim.com
On 7 Apr 2015 at 16:34, Bill Dennis via EV wrote:
> Here's the URL to the article I quoted, plus the paragraph from the article
> itself:
I see the problem. Not your fault, though perhaps you might have been more
skeptical. ;-) It looks like the news release's writer was either carelss or
tech
If I have the back of the envelope right...if you make 100g cells, package 72
of them together for a single 144-volt super-cell, and then parallel'd sixteen
of them into a battery...just the battery bits (without packaging, wiring, or
the like) would weigh ~250 pounds, it'd have about 16 kWh cap
Actually, the end of the sentence says power density, so I think that they are
using the correct metric after all, only their quote is completely opposite to
Nature's, so the first question still stands. Who to trust.
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626
Who do you trust - Nature or this gatget article that has no clue that
electricity is not stored in Watts
but in Watt hours...
Cor van de Water
Chief Scientist
Proxim Wireless
office +1 408 383 7626 Skype: cor_van_de_water
XoIP +31 87 784 1130 private: cvandewater.info
www.pr
On 7 Apr 2015 at 15:59, Bill Dennis via EV wrote:
> Their current version of the battery has only 40 watts of electricity per
> kilogram compared to lithium's 100 to 206 W/kg power density
You can't compare Watts/kg with Watt-hours/kg. That's like comparing
horsepower to gallons.
David Roden -
Here's the URL to the article I quoted, plus the paragraph from the article
itself:
http://www.engadget.com/2015/04/06/stanfords-battery-charges-in-one-minute/
" Unlike earlier aluminum batteries, which generally failed after only about
100 recharge cycles, Stanford's prototype can cycle more tha
Actually,
the Nature article quotes 4 Amp per gram, so if a 2V cell weighs 1kg then it
could produce 4,000A or 8kW per kg
The Capacity is quoted as 70mAh per gram, which is 140 Wh per kg (again, at the
expected 2V cell voltage).
Note that all these numbers are the bare cell, so to compare with
If they're claiming charge rates of 1 minute, I think the 40w/kg must be
referring to something else. It would seem it should be order(s) of
magnitude higher.
There's other Al-ion research going on at Oak Ridge. There, Gilbert
Brown claims to have a cell with an energy *density* of 1060wh/kg
/group/NEDRA)
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/5afb706b/attachment.htm>
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http:/
Indeed...I just checked the abstract and it cites 70 mAh/g. It's an unfair
comparison because of all the extra hardware from the box and what-not, but a
CALB 180 Ah battery weighs 5.6 kg, which works out to 32 mAh/g. That they're in
the same order of magnitude tells me this may well be competiti
/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.o
IBE: http://www.evdl.org/help/index.html#usub
> http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> For EV drag racing discussion, please use NEDRA (
> http://groups.yahoo.com/group/NEDRA)
>
>
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.
Their current version of the battery has only 40 watts of electricity per
kilogram compared to lithium's 100 to 206 W/kg power density--so you'd need
more of them to get the same power. That might get better as they improve
the cells, of course.
Bill
-Original Message-
From: EV [mailto:
http://www.eshopsem.com/boutique/manufacturer.php?id_manufacturer=3
On 4/7/2015 1:05 PM, Lawrence Rhodes via EV wrote:
Michelin radial 95/80 r16
--
Don Bradley
PO Box 141
Forestville, Ca. 95436
Maker of Signal Generators for Chladni Plate Tuning
_
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> For EV drag racing discussion, please use NEDRA (
> http://groups.yahoo.com/group/NEDRA)
>
>
--
www.electric-lemon.com
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/54f19fe0/attachment.htm>
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.ev
On Apr 7, 2015, at 1:05 PM, Lawrence Rhodes via EV wrote:
> The Michelin radial 95/80 r16 radial is the tire used by solar racing teams.
> Anyone know where to get them?
I'd first directly contact one of the teams that you know used said tire and
ask them where they got theirs.
Next, Micheli
Does anybody know any more about this research?
http://news.stanford.edu/news/2015/march/aluminum-ion-battery-033115.html
Aluminum anode; graphite cathode. Unspecified salt for the electrolyte.
It's only about two volts. The rest of the specs are vague...nothing at all
about capacity. They cla
The Michelin radial 95/80 r16 radial is the tire used by solar racing teams.
Anyone know where to get them? Lawrence Rhodes
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/54f19
Eva Hankansson (my wife) with a graduate school partner have started a
science e-zine called "Science Envy":
http://scienceenvy.com/
They write articles on popular topics and explain the highly
technical aspects in ordinary terms.
It is interesting that her EV related and racing related ar
On Apr 7, 2015, at 7:17 AM, Electric Blue auto convertions via EV
wrote:
>
> I dont care what gas cost, never hugged a tree nor will. I have NO political
> affiliation, will not condemn any politician, nor point a finger, cus, thers
> always 3 pointing back
You just hate lawyers.
- Mark (no
affiliation, will not condemn any politician, nor point a finger, cus, thers
always 3 pointing back Just my 2 cents
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/1e698f4c/attachment.
org/help/index.html#usub
> > > http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> > > For EV drag racing discussion, please use NEDRA (
> http://groups.yahoo.com/group/NEDRA)
> > >
> > ___
> > UNSUBSCRIBE: http://www.ev
> ___
> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> For EV drag racing discussion, please use NEDRA
> (http://groups.yahoo.com/group/NEDRA)
>
>
>
-- next part --
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150407/8b5f1ae7/attachment.htm>
___
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
http://dealbreaker.com/2015/04/california-might-make-it-prohibitively-expensive-to-buy-a-100k-car/
California Might Make It Prohibitively Expensive To Buy A $100K Car
By Thornton McEnery [20150403]
So you’re an on-the-go millionaire who is both ecologically and
aesthetically aware? Oh, you’re g
http://www.sunlive.co.nz/news/96992-journey-to-allelectric-driving.html
Journey to all-electric driving
02 Apr, 2015 | By Hunter Wells
[image
http://www.sunlive.co.nz/assets/images/site/Electric-Cars-Ross-S1513-HW.jpg
Ross Brown is a self-professed ‘techno-nut' who loves gadgets. Big,
expensiv
http://www.greenoptimistic.com/tesla-gigafactory-japan/
Tesla Looking to Build Second Gigafactory in Japan
Sarah Higman April 2, 2015
[image
www.greenoptimistic.com/wp-content/uploads/2015/04/tesla-gigafactory-japan.jpg
(photoshopped)
]
Hot-giggaty! According to a Bloomberg report, Tesla exe
To bring this thread more or less back on topic, I suppose self-driving cars
might have one intriguing benefit. When they know the exact route and
conditions - as they probably would have to - they might have a better
chance at predicting whether you have enough charge in your EV to get there,
> You mean Diebold?
Et cetera, et cetera ...
Folks, please check your politics at the door. If you're going to start
flame wars, at least start them over EVs, not politics.
Thanks.
David Roden - Akron, Ohio, USA
EVDL Administrator
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVD
45 matches
Mail list logo
