Pretty dangerous youtube video, uploadet 2012 and still online... - Page 1
Forum section: electronics / projects

author: PeterFW
author_rank: Frequent Contributor
timestamp: April 07, 2015, 08:28:28 pm
content: Hello!Maybe if everyone who reads this thread flags this video as dangerous they will remove it...https://www.youtube.com/watch?feature=player_detailpage&v=lE9FFy_MbC0#t=188This idiot "fixes" swollen lithium batteries by poking a hole in them to get rid of the "excess gas".As far as i can make it out, he is serous, even if this is a joke, it is a very bad one.

author: amyk
author_rank: Super Contributor
timestamp: April 07, 2015, 09:17:50 pm
content: Bleeding the gas has been done successfully on RC lipos... it's not as dangerous as you think, especially if you reseal the hole afterwards. Shorting the cell is what causes the heat and flames.

author: ivan747
author_rank: Super Contributor
timestamp: April 07, 2015, 09:25:14 pm
content: It's still stupid and dangerous, especially for something you have on your lap with a battery of that size. Well... Darwing will burn their reproductive bits...

author: PeterFW
author_rank: Frequent Contributor
timestamp: April 07, 2015, 09:28:37 pm
content: Quote from: amyk on April 07, 2015, 09:17:50 pmYea, but...How many of those people who use such a video to fix their problem have the slightest idea what they are dooing?The right explosive can be hit with a hammer and you will be fine, use the wrong one and you will have a very bad day.Or just a few µ-seconds, depending on the amount and type...

author: Ian.M
author_rank: Super Contributor
timestamp: April 07, 2015, 09:30:29 pm
content: I thought "Stupid & Dangerous" was Youtube's target male demographic?

author: max666
author_rank: Frequent Contributor
timestamp: April 07, 2015, 09:40:53 pm
content: Sometimes you have to let natural selection do its job.But to be serious for a moments. What exactly are the toxic gases he's talking about? Is it phosphoryl fluoride POF3and hydrofluoric acid HF?Would be interested to know what's going on chemically when the cells bulge.And I presume "bleeding the gas" doesn't fix anything?

author: ivan747
author_rank: Super Contributor
timestamp: April 07, 2015, 09:46:22 pm
content: Quote from: max666 on April 07, 2015, 09:40:53 pmEven if it actually fixed it, it's a dangerous thing to do. Would you change a lightbulb on a 32nd floor using a flimsy ladder on wet floor right beside an open window? Somebody reasonable wouldn't. But as always, there are people with no concept of danger.

author: eas
author_rank: Frequent Contributor
timestamp: April 12, 2015, 08:03:51 pm
content: Quote from: max666 on April 07, 2015, 09:40:53 pmLithium ion cells form gas during formation of the electrodes. This gas is usually vented/removed during manufacture. Excess gas generated during aging/use, as opposed to thermal decomposition, are believed to be similar to the gas formed during formation. According to the sourcessummarized here, the composition of gases depends a lot on electrolyte composition and is typically breakdown products of electrolyte chemicals, typically: H2, CO, CO2, methane, ethylene and propylene. None of these are particularly nasty in small quantities, contrary to extrapolations from the behavior of cells in thermal runaway by random internet experts.I considered doing this with some little RC lipos. Risks I've identified: accidentally causing a short, doing a bad job of resealing the cell, which brings the risk of a short due to evaporation of electrolyte, or the accidental introduction of water, which can react with the lithium salts in the cell, which can result in the production of Hydrogen Floride/Hydrofluoric acid, which are indeed nasty.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: April 12, 2015, 09:08:04 pm
content: Oh the horror! Someone doing something with a higher risk level than you are comfortable with.While the risk/reward payoff on this particular escapade doesn't seem particularly good, it doesn't seem likely to end life as we know it, burn down cities, or even to kill significant numbers of people.In this internet age you can find alarmists wanting to eliminate all of the terrible things from our society. People will take a bit of information, such as knowledge that men don't have a robust mechanism for eliminating excess Iron in the body and turn it into a campaign to eliminate Iron. This has resulted in widespread movements to ban useful stuff from our world. The nasty metals like Arsenic, Bismuth, Lead, Mercury, Strontium, Copper and Aluminum. Or those horrible toxins - chemicals - which must be eliminated from all of our food and clothing.Once you have accurately pointed out the risks of a particular behavior, and evaluated whether this behavior will have a direct effect on you or those you know, it is time to move on. It isn't the job of any of us to tell the whole world how to live their lives.In this particular example, some number of people will be motivated to try "fixing" their batteries. The vast majority will not cause any proximate harm. A few will breath a small quantity of something not good for them, which in some cases will result in a shortening of potential lifespan. (Remember that people who do things like this are also likely to try a large number of other potentially life shortening activities). The vast majority will find that the batteries are not restored to like new condition, and in many cases not even to usable condition. They will seldom, or never repeat the experiment. This will remain a fringe activity that has little impact on the health and safety of the world.

author: max666
author_rank: Frequent Contributor
timestamp: April 12, 2015, 09:09:56 pm
content: Thanks for the info, eas! Interesting stuff.I don't see how venting is a solution, because you would have to reseal it vapour-diffusion-proof (I don't think a piece of tape will do it).Quote from:http://www.rdmag.com/articles/2014/04/trace-degradation-analysis-lithium-ion-battery-componentsAnd that Exponent Report for NFPA is great:Quote"rapid disassembly" ... I love how they manage to sterilise language, imagine how FAUXNews would report a "distribution of cell materials over a wide radius"

author: ivan747
author_rank: Super Contributor
timestamp: April 21, 2015, 03:10:44 am
content: Quote from: max666 on April 12, 2015, 09:09:56 pm'Muuurica. That's both sides of the spectrum right there.

author: Zero999
author_rank: Super Contributor
timestamp: April 21, 2015, 12:18:46 pm
content: There are far more dangerous videos on youtube, such as the one of the Russian kids playing on top of train and the Ukrainians playing with a magnetron.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 21, 2015, 08:32:14 pm
content: Quote from: PeterFW on April 07, 2015, 08:28:28 pmseriously are you serious? because i just bought my first lipo several weeks ago and it got swolen after. i did poke it with metalic paper knife (as not advised in the video) and release the gas, seal it again with elcheapo tape and i'm still around, well i'm not saying that safe ok? i poked it with care... next time i will use plastic knife as advised in the video, thanks to the video.sometime people who do this do not expect "like new" battery after, but just only to be able to fit in in something tight place or have a peace of mind seeing "not bulged" battery. fwiw it was a 5200mah 4s battery i was poking about, china came i'm not sure if its really 5200mah or even i'm not sure if its really "lipo".

author: lincoln
author_rank: Regular Contributor
timestamp: April 21, 2015, 09:24:45 pm
content: Quote from: ivan747 on April 07, 2015, 09:25:14 pmSeems like a self regulating problem.

author: WZOLL
author_rank: Regular Contributor
timestamp: April 22, 2015, 02:55:17 am
content: I was taking apart a small Li-Ion battery and the foil was glued to the plastic and ripped. The gas has a distinct metallic smell that's not that bad.

author: ivan747
author_rank: Super Contributor
timestamp: April 28, 2015, 02:40:23 am
content: Quote from: lincoln on April 21, 2015, 09:24:45 pmOne that's becoming more useless with time, as we progress, there are less ways for natural selection to happen.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 28, 2015, 03:21:32 am
content: Quote from: ivan747 on April 28, 2015, 02:40:23 amto burn there reproductive bits is his personal selection. to use it in unnatural way is there personal selection, as for nature... anything that can "select" is "intelligent"

author: c4757p
author_rank: Super Contributor
timestamp: April 28, 2015, 03:36:10 am
content: Quote from: Mechatrommer on April 28, 2015, 03:21:32 amI imagine that Mechatrommer's post composition process involves a dartboard with words written on it.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 28, 2015, 03:53:08 am
content: no, its deductive logic.

author: c4757p
author_rank: Super Contributor
timestamp: April 28, 2015, 04:35:43 am
content: That, or you're a Markov bot.

author: Fungus
author_rank: Super Contributor
timestamp: April 28, 2015, 11:57:41 am
content: Quote from: Hero999 on April 21, 2015, 12:18:46 pmI'm damned if I can find it now but I enjoyed the one of Russian kids flying kites into pylons (it's a way to make very impressive sparks for very little material outlay).

author: BradC
author_rank: Super Contributor
timestamp: April 28, 2015, 12:01:43 pm
content: There is no cure for stupid, and attempting to legislate it away is just prolonging the inevitable. That and denying the rest of us solid entertainment.

author: BradC
author_rank: Super Contributor
timestamp: April 28, 2015, 02:55:44 pm
content: Quote from: blueskull on April 28, 2015, 12:50:04 pmOh, get your hand off it. Stupid is as stupid does. You can't make something foolproof because someone keeps coming up with more inventive fools.

author: jwm_
author_rank: Frequent Contributor
timestamp: April 30, 2015, 04:40:42 am
content: That is one of the lower danger, dangerous videos on youtube.You want a dangerous thing on the internet, I give you thishttp://www.instructables.com/id/propaine-air-tool-attachment/

author: Zero999
author_rank: Super Contributor
timestamp: April 30, 2015, 09:52:09 am
content: Quote from: jwm_ on April 30, 2015, 04:40:42 amThat site should be called destructables. lolThere are so many retards on that site who know nothing about engineering and the bad/dangerous projects far outnumber the good ones.

author: mzzj
author_rank: Super Contributor
timestamp: April 30, 2015, 11:06:50 am
content: Quote from: jwm_ on April 30, 2015, 04:40:42 amPropane powered air tools. Gotta appreciate that! Now how about powering your die grinder with propane!Poking holes to hobbyrc-lipos...nahHow about earning your living here:https://youtu.be/ahZz1E1GFsk?t=119I get weak on my knees just watching at that video and I am usually not the first one to cry about work safetyOSHA... what?

author: max666
author_rank: Frequent Contributor
timestamp: April 30, 2015, 04:04:13 pm
content: Quote from: mzzj on April 30, 2015, 11:06:50 amWow, two hand coordination around two saw blades ... this is guaranteed to get bloody. I wonder if they have a 'Days Since Last Accident'-sign:

author: SeanB
author_rank: Super Contributor
timestamp: April 30, 2015, 04:06:48 pm
content: Easy to tell the old timers, with names like nine finger Bill, pinky Jones.......