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[SOLVED] The 10-second recharge battery

 
 
MC
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      Mar 13th, 09, 7:14 PM
http://snipurl.com/dqtj7

Scientists develop mobile phone battery that can be charged in just 10
seconds

By David Derbyshire
Last updated at 7:31 PM on 11th March 2009


A revolutionary mobile phone battery that recharges in 10 seconds
instead of several hours has been created by scientists.

The new device charges 100 times as fast as a conventional battery and
could also be used in phones, laptops, iPods and digital cameras within
just two or three years, they say.

The same technology could even allow an electric car to be charged up in
the same time that it takes to fill a conventional car with petrol -
removing one of the biggest obstacles to green, clean motoring.

The quick-charge battery is the brainchild of engineers at the
Massachusetts Institute of Technology.

The MIT team say their invention uses materials already available to
battery manufacturers and would be simple to mass produce.

The invention is based on conventional lithium ion rechargeable
batteries found in most cameras, phones and portable computers.

Lithium ion batteries are used in portable gadgets because they store a
large amount of energy in a small space.

However, they are also relatively slow at recharging - which can be a
nuisance for anyone who forgets to charge up their phone overnight.

Dr Gerbrand Cedar, who devised the new battery, said: 'Electric car
batteries have a lot of energy so you can drive at 55mph for a long
time, but the power is low. You can't accelerate quickly.'

Dr Cedar and colleagues have now found a way of speeding up this
process, the science journal Nature reports.

Conventional lithium ion batteries contain two electrodes - one made
from lithium and one from carbon - submerged in a liquid or paste called
an electrolyte.

When a battery is being charged up, ions - or positively charged atoms -
flow from the lithium electrode to the carbon one. When a battery is
discharging, the ions flow the other way.
ggggggg

The new battery could also work with rechargeable cars

Charging up or discharging a battery is slow because it takes time to
'detach' the ions from one electrode and absorb them into the other.

The researchers took a conventional electrode made from lithium iron
phosphate and altered its surface structure so that ions were released
and absorbed 100 times more quickly than normal.

A prototype made using the new technique could be fully charged or
discharged in just 10 to 20 seconds. A similar sized ordinary battery
takes six minutes to charge.

Unlike other battery materials, the new material does not degrade when
repeatedly charged and recharged. That could lead to faster batteries
lasting between two or three years, they said.

'The ability to charge and discharge batteries in a matter of seconds
rather than hours may open up new technological applications and induce
lifestyle changes,' Dr Ceder said.

The technology could also usher in a new generation of smaller, lighter
batteries that allow phones and handheld batteries to be the size of
credit cards.

Although the invention will be popular with owners of electronic
portable gadgets - who will no longer need to remember to keep them
charged up overnight - it could also usher in a new era of electric cars.

Bigger batteries for plug in electric cars could charge in just five
minutes - compared with about eight hours for existing batteries.

Owners of electric cars would be free to drive long distances, safe in
the knowledge that they could top up their battery in a few minutes at a
service station - just like the owner of a petrol or diesel car.

___

Now watch someone turn *this* into an anti-iPhone rant...

--

Show me a hero and I'll write you a tragedy.
F. Scott Fitzgerald
 
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      Mar 14th, 09, 3:49 AM
In article <qFEul.62938$(E-Mail Removed)>,
Todd Allcock <(E-Mail Removed)> wrote:

> > Now watch someone turn *this* into an anti-iPhone rant...

>
>
> Ok, since you asked nicely...
>
> If manufacturers release "drop in" compatible upgrades for existing
> products (like Nokia did with Li-Ion replacements for many of their older
> Ni-MH-powered phones), existing phones with non-user replaceable
> batteries like the iPhone, wouldn't be able to easily take advantage of
> the technology...
>
> How did I do? ;-)


Not bad!

--

Show me a hero and I'll write you a tragedy.
-- F. Scott Fitzgerald
 
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Larry
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      Mar 15th, 09, 1:02 AM
MC <(E-Mail Removed)> wrote in news:copespaz-59DB17.14141813032009
@mara100-84.onlink.net:

> The quick-charge battery is the brainchild of engineers at the
> Massachusetts Institute of Technology.
>
>


No, it's not. Toshiba invented it. Recharges to 80% in 60 seconds and
fully charged in 3 minutes, flat. This is really old news:

http://www.physorg.com/news3539.html

March, 2005....years ago.

Loses 1% capacity after 1000 deep cycles....incredible. 80% charge at -
40C!

After all these years, it has never been sent to market. Probably is too
reliable, too much power in too small a package.

Somebody buried it....bought it and buried it.

http://www.edmunds.com/advice/altern...3/article.html
Zenn and EEStor have a better idea, a massive, ultra-high-capacity, ultra
compact capacitor.....no chemistry, no toxic acids, stores electrons
directly in a dielectric that you can recharge to 100% as instantly as you
have a massive charger for. Charge it as fast as your power supply will
let you. No battery replacement for $10000, ever...millions of miles.

You can bet there are hundreds of big corporations hell bent on making sure
you never see it sitting in your driveway.....oil, battery, dealers....

You'll recharge your EEStore phone by plugging it into its cradle for 5
seconds, the house lights will dim like when a big electric heater starts,
then you'll unplug it ready to go from dead to full charge, instantly.

 
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Larry
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      Mar 15th, 09, 1:03 AM
Todd Allcock <(E-Mail Removed)> wrote in news:qFEul.62938
$(E-Mail Removed):

> iPhone, wouldn't be able to easily take advantage of
> the technology...
>
> How did I do? ;-)
>
>


I thought you were very civil, Todd, while pointing out the obvious....

 
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      Mar 15th, 09, 1:07 AM
Todd Allcock <(E-Mail Removed)> wrote in news:rSRul.50790
$(E-Mail Removed):

> To continue playing devil's advocate, the battery wouldn't have to be
> charged by the phone circuitry. In return for a battery that charged
> "instantly", I suspect many of us would be willing to use an external
> charger and take the battery in and out to charge it, much like many of
> us do with cameras and cordless power tools.
>
> But that's really a problem for this future tech as well- how will you
> safely and easily charge a, say, 1500mAH 5V battery in a few minutes? I
> assume higher voltages will be used to keep current down. Certainly
> something I won't lick the end of to see if it's live... ;-)
>
>


One of the biggest advantages of EEStor's monster capacitor is it has no
chemical reaction to wait for, storing electrons directly. No special
charging electronics will be necessary. The limiting factor will be the
source impedance of your charging power supply. That will limit how fast
it will charge....that and whether you have it plugged into a 20A 120VAC or
50A 220VAC or 480VAC 200A 3-phase source....(c;]

Hackers will be seen robbing subway systems by connecting their phones to
the third rail for a few seconds....

 
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