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High School student invents device that can charge in 20 seconds

helichulo

Senior Heliman

Queens, New York

It's in the news this morning, it can charge a cell phone battery in 20 seconds. Wonder if the future is all of sudden getting a lot brighter for the electric fliers since eventually the technology will find it's way to RC. And also, electric cars like Volt and Tesla.

A high school student from California has created a way to charge cell phones completely in just 20-30 seconds.

Eesha Khare, 18, of Saratoga, California, recently won the $50,000 Intel Foundation Young Scientist Award for her fast-charging device.

The device uses a supercapacitor that can store a lot of energy into a small space. It is capable of 10,000 charge-recharge cycles and can fully charge a cell phone in 20-30 seconds.

Traditional chargers typically take hours to achieve a full charge, and are capable of only 1,000 cycles for rechargeable batteries.

never in the history of human entertainment has so much been owed by so many to so few

05-20-2013 Over year old.
Rotormaster

Veteran

Australia

A high school student from California has created a way to charge cell phones completely in just 20-30 seconds.
I do this all the time with my phone. I remove the back cover, remove the depleted battery and replace with charged battery. I don't even remember the last time I plugged my phone to charge... why would you??

Seriously though, sounds pretty interesting.


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05-20-2013 Over year old.
Rotormaster

Veteran

Australia

http://www.societyforscience.org/isef/


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05-20-2013 Over year old.
JKos

rrProfessor

Redondo Beach, CA

From one of the "Top Winners" document on the ISEF web page:
Eesha Khare, 18, of Saratoga, Calif. received the Intel Foundation Young Scientist Award of $50,000. With the rapid adoption of portable electronics, Eesha recognized the crucial need for energy-efficient storage devices. She developed a tiny device that fits inside cell phone batteries, allowing them to fully charge within 20-30 seconds. Eesha’s invention also has potential applications for car batteries.
I don't even remember the last time I plugged my phone to charge... why would you??
Plugging your phone in is considered the norm here. Most people have a case on their phone which you would have to remove then the back cover to get the battery out. Getting the back cover off some phones is quite a challenge and physically wears it out quickly. And, your phone is then off and has to reboot before you can continue using. Are you counting power down and power up time in your 20 seconds?

Then there are iPhones...

- John

RR rules!

05-20-2013 Over year old.
helichulo

Senior Heliman

Queens, New York

Man, just think about it: Flying you 700 size E Heli, landing n charging in about 5 -8 mins while you talk to the guys n stuff. No need to change the battery and fly again. Wow, E Flight sure looks promising.

never in the history of human entertainment has so much been owed by so many to so few

05-20-2013 Over year old.
LosD

New Heliman

Denmark

Only one problem: Supercapacitors currently has around 1/10-1/20 energy density of a LiPo, so it is probably not really viable to put on your heli.

OTOH, it can discharge at around 350,000C...

05-20-2013 Over year old.
wrongler

rrProfessor

Brewerton, New York

If they can get it to charge a 5000 mah lipo quick, that may cut down on the number of batteries you would need.

" RIP Roman "

05-20-2013 Over year old.
Rotormaster

Veteran

Australia

Plugging your phone in is considered the norm here. Most people have a case on their phone which you would have to remove then the back cover to get the battery out. Getting the back cover off some phones is quite a challenge and physically wears it out quickly. And, your phone is then off and has to reboot before you can continue using. Are you counting power down and power up time in your 20 seconds?
Then there are iPhones...
Well when I said "why would you?", I meant more to say why would I... Of course, I do realise that some phones don't even provide the option to change the battery.

And yeah, I was obviously exaggerating. I do use a rubber case on my phone, but that comes off in a second, as does the back cover. Powering off and on takes a little over 30 seconds alone, so I already loose there. All together, I could easily do it in under a minute though, which I think is still pretty good considering I didn't win $50k! Lol. J/K.

PS: Despite the article's headline, there exists no phone that charges in 30 seconds. So technically, I still charge my phone faster than she does.
Man, just think about it: Flying you 700 size E Heli, landing n charging in about 5 -8 mins while you talk to the guys n stuff. No need to change the battery and fly again. Wow, E Flight sure looks promising.
I don't know about that.

EDIT: Energy density is still a challenge, remaining considerably lower than current batteries.

In my opinion, our eye should be on the electric vehicle industry. An auto maker from Serbia recently created a long range electric super car with 1000hp.

If this trend continues, we will see big money being poured into the development of battery chemistry technology, and it's not too hard to see how this could potentially benefit the hobby in the future.


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05-20-2013 Over year old.
helichulo

Senior Heliman

Queens, New York

It would be great if you could charge in a few minutes more than it takes to refuel a Nitro Heli. That would be the ultimate. It's coming, no doubt about that.

never in the history of human entertainment has so much been owed by so many to so few

05-20-2013 Over year old.
MartyH

Elite Veteran

USA

at what cost to battery life?

05-20-2013 Over year old.
Rotormaster

Veteran

Australia

If they can get it to charge a 5000 mah lipo quick, that may cut down on the number of batteries you would need.
Wrongler, this device is not a charger, it's a supercapacitor.

http://www.usc.edu/CSSF//History/20...jects/S0912.pdf


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05-20-2013 Over year old.
LosD

New Heliman

Denmark

You seem to misunderstand: It is not the charger that is different, it is the battery that is replaced by a super capacitor.

This have some advantages, and some drawbacks:
Advantages:
- Super fast charging
- 10,000-100,000 recharge cycles
- Extremely high discharge rate. All energy can be discharged in milliseconds.

Disadvantages:
- 1/10-1/20 energy density compared to modern battery chemistry. A heli pack would probably only last for 15-30 seconds.
- Very expensive
- High self-discharge (not that it would matter so much for heli usage, when charging them is so fast.
- The discharge rate pretty much guarantees bad things happening if short circuited.

Edit: Oh, Rotormaster beat me to it

05-20-2013 Over year old.
Justin Stuart

rrMaster

Plano, Texas

Do you have any idea how expensive a supercapacitor capable of charging a 6s 5000mAh pack would be?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

05-21-2013 Over year old.
Tyler

Elite Veteran

Chicagoland area

I can charge my two 5000mah 10s packs in 13 minutes total with a quick charge cycle. Takes about 17-25 if doing a full blown balance cycle.

All on a single charger.

Enjoy things that money can buy IF you don't lose the things money can't buy.

05-21-2013 Over year old.
HOMEPAGE  
bostonkiter

Heliman

South Boston, MA

MY BRAIN STINGS.

05-21-2013 Over year old.
DougPenhall

Senior Heliman

San Jose, CA - USA

I just bought two Thunderpower 65C batteries for my 130x that claim a 12C charge rate. That's a full charge in 5 minutes and I'm getting 5 minute flight times as well. They are 325mAh. If they were say 450mAh with a 12C charge ratebI'd be getting 7 minute flight times and still be able to charge in 5 minutes.

05-21-2013 Over year old.
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High School student invents device that can charge in 20 seconds

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