Mobile device battery of the future could charge while the user walks around the block
posted by Alan F. / Jan 06, 2016, 11:49 PM
The technology involved is similar to the lithium ion batteries used by many smartphones, but would be flexible enough to use in wearable devices. While a li-ion battery used in a handset takes in power and stores it until needed, MIT's new cell takes in mechanical energy and converts it to electricity.
One part of the battery would be attached to an arm or a leg. The everyday movements would force the bending of two thin sheets of lithium alloys, separated by a layer of porous polymer soaked with liquid electrolyte. The bending squeezes lithium ions through the soaked polymer creating an electrical current between the two lithium alloy sheets. That current could be used to power a smartphone, tablet or smartwatch.
While other methods that harvest mechanical energy had small current output and short pulse duration, the MIT technology had large current output and long pulse duration. All of this means that future smartphone and wearable devices powered by such a battery could be fully charged after a short, brisk walk around the block.
Don't expect this technology to be powering mobile devices anytime soon. While testing shows that the system is stable, there is still much more work to be done before this technology becomes ready for prime time.
The process was described in a paper written by MIT professor Ju Li, graduate students Sangtae Kim and Soon Ju Choi, and four others.
source: MIT via BGR
Posts: 812; Member since: Dec 19, 2014
Still not exactly sure how this would work. Would it involve a wire, or emit higher radiation levels than what a handset itself traditionally does?... I got an idea. How about swapping out a low battery for a fully-charged one? When will someone ever think of that?
posted on Jan 07, 2016, 12:01 AM 0
You still need to charge the battery if you want to swap that. This solution enables you to never ever charge your battery, unless you are super-lazy. I usually walk 7-8 KM a day. This kind of solution will enable me to even get away with a 1000 mAH battery in a phone.
posted on Jan 07, 2016, 1:27 AM 1
Posts: 1548; Member since: Jun 04, 2013
I got an idea. How about converting the heat energy that phone emits in to electricity then charge the phone? Nowadays phone do get pretty hot so might work right? At least helps to get batter battery backup right?
posted on Jan 07, 2016, 2:57 AM 3
Posts: 994; Member since: Jul 31, 2012
First, if you're collecting the heat then you are already cooling the phone, and second, heat is just the wasted energy so that might be 40% of the input power but once you collect and convert it you'd only be putting like 10% of the initial power back into the battery. It's nice if it lives 10% longer but not if the phone is twice as thick to accomplish it. At that rate just start with a battery that is 3 times larger and fits in the same space as the fancy converter, and for less cost.
posted on Jan 07, 2016, 9:05 AM 0
Posts: 4769; Member since: Mar 07, 2012
Asians...Asians everywhere! If this works out, m'a start jogging every morning.
posted on Jan 07, 2016, 12:21 AM 1
Posts: 790; Member since: Jul 21, 2015
Samsung is currently at the forefront of the development, and we will get a real deal pretty soon. Thanks to Samsung SDI and other relevant parties like LG Chem and Samheung Battery for this fantastic effort.
posted on Jan 07, 2016, 1:21 AM 0
Posts: 2697; Member since: Nov 09, 2015
If it comes into production, it would be a flop in U.S, I'd bet. Okay, sure it converts mechanical energy into electrical one... BUT HOW DO YOU EXPECT COUCH POTATOES, THE LARGEST COMMUNITY WHO BUY THE LATEST AND GREATEST SMARTPHONE TO EXERCISE? The battery should charge while YAPPING & SWIPING... Or while SLEEPING. Or... You know... Being a couch potato. Or... How about they charge on CALORIES...? Or FARTS, for example? Just sayin'...
posted on Jan 07, 2016, 12:36 AM 4
Posts: 64; Member since: Dec 30, 2015
Could I attach the phone to my pet and have them run around the yard for an hour? lol
posted on Jan 07, 2016, 12:44 AM 7
Posts: 2697; Member since: Nov 09, 2015
TrevorB1@ LOLz! Yes, it didn't occur to me. Man, you Americans might be lazy, but you're sure pretty smart! I had a good laugh reading this... You just made my day! Thanks...
posted on Jan 07, 2016, 1:19 AM 3
Posts: 843; Member since: Aug 01, 2011
Why can't someone just invent a bigger battery and thicker phone?
posted on Jan 07, 2016, 4:08 AM 0
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