Cutting open an LG 18650 battery for science [ amateur video warning ]

Getting an 18650 cell open and taking a look inside.
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Thanks for tuning in as always!
Pete
#diypowerwalls #hbpowerwall #18650ed #diypowerwall

[@batterymooch]

At around 13:00 you can see extremely uneven deposits or distribution of something in the layers as you unroll them. A new cell has all the layers look same across their entire surface. Are there any pinholes in the bottom spot weld points? The could have resulted in some electrolyte evaporating out the bottom of the cell (causing the weird marking) and perhaps leading to excess gas formation due to heat from the higher internal resistance where the anode/cathode material was electrolyte-starved. Just guess though. The CID appears to be intact so it was a side rupture. This is entirely possible and NASA even has workshop PDF’s online describing the issue and how to design around it when creating battery packs. The bottom vent structures in some cells are there, in part, to help prevent side rupture in case the top vent gets clogged during thermal runaway or if an internal short circuit is up against a side wall.

[@Spector_NS5_RD]

haha.... I knew you'd be here! My man Mooch.

[@batterymooch]

Spector NS5 RD hello Spector! 👊

[@AT2Productions]

Or he could be using already defective batteries and making them worse by his mishandling, damaging of them, and unregulated mass charging. But hey, it's not like he hasn't been warned that he'd have failures that will ultimately result in catastrophic damage. Oh, wait, he has? Fascinating.

[@yogamon]

There was dendrites. You should have put it under the microscope. The black conductive electrode attached to the copper current collector is the anode made of graphite. On its surface there can be lithium dendrites, and there was quite a few.

[@batterymooch]

@@yogamon how do you know there were (microscopic) lithium dendrites forming near the bottom of the cell? Why would dendrites on the anode leave marks on the separator? Do you have links to examples of these types of patterns being caused by lithium dendrites?

[@mike-ph3fk]

"But I wouldn't know what I'm looking at. Pointless" the honesty of tell people you dont know when you simply dont know is nice. Plus it's kinda funny. Lol

[@HBPowerwall]

I admire people who take things apart and can name very component & part inside .. That person is most definitely not me

[@mike-ph3fk]

@@HBPowerwall give it the ole college try anyway tho. Cheers!

[@lastxp]

Still very informative

[@vk3hau]

do you watch Big Clive, this is the sort of thing he loves to do. very knowledgeable bloke. here is his teardown of a laptop battery, good and bad ones. kzbin.info/www/bejne/nYqppomYj9Koa68

[@jerrodrollins1509]

Even though you didn't know what exactly we were looking at, that does not make it less interesting at all, more in fact, to find out how this device that we trust in chooches. If constructive criticism is welcome, if you would have explained like the texture of it, was it wet, was it gritty, etc. Being really dry and flakey can be somewhat vague as well, so perhaps good examples of common enough items to describe the condition. That's what I would have been the improvement I made, but I really enjoyed it. Thanks! My channel is under construction right now

[@oleglyan]

My collegues decided once to cut with a cable cutter outdoor a potential and continuity less cell pre-tested. So they cut it with full confidence and surprised with a fire burst from cell. My guess, is that cell was charged, but inside terminals were torn off, may be from falling shock once.

[@HBPowerwall]

I would love to do experiments like that but don't have a safe place where it's educational and safe

[@roadiesgarage3816]

Thank you sir hopefully this will save many curious cats like my self. Great job man!

[@HBPowerwall]

Glad it was helpful!

[@wearemilesfromnowhere4630]

Had me glued. Thanks for the looksee.

[@HBPowerwall]

Any time! thanks for tuning in

[@kennethalmond8922]

had me glued as well - thank you

[@Buzzhumma]

The continuity is working because the electrolyte evaporated instead of low voltage tripping the cid

[@GapRecordingsNamibia]

4:05 I will still stand by my last comment in your last video, where I said that this is due to SEI build up within the cell, remember that the SEI as it grows causes the cell to gradually fail and short out internally........ this is somewhat more catastrophic, but I would still blame the SEI build up.... Also, these batteries don't contain any lithium metals only lithium Liquid and that is how they operate, if there was any lithium metal in there I would have ducked when you put it in the water. I've disposed of many cells that have torn or somehow been hurt while dismantling them from packs by throwing a cell into a plastic container with salt water solution in it, when you give it time you'll see the liquid actually start to turn green..... Well done Pete. Really informative video.

[@HBPowerwall]

I think that is very possible - i really don't understand it enough - but trying to use this as a learning opportunity

[@GapRecordingsNamibia]

@@HBPowerwall oh yeah, for sure, 'cause someone has to do it for science, none of us are pro's but there are the few of you out there that have been at it longer than the rest of us.... That's why we like watching......

[@HBPowerwall]

Science is a good reason to play / learn in a fun way lol thanks for tuning in

[@batterymooch]

The SEI layer is non-conductive and causes a loss of available lithium, slows down ion diffusion, and increases the internal resistance of the cell. It is not a cause for internal short circuits. That can be caused by a contaminant, internal physical damage, or dendritic lithium metal formation from multiple causes. There is no “lithium liquid” either. There is an organic solvent based electrolyte that has a lithium salt (lithium hexaflurophosphate) dissolved into it though.

[@GapRecordingsNamibia]

@@batterymooch thank you for the correction.....

[@CheapCheerful]

You are a brave man to play with the fire of a thousand suns.

[@HBPowerwall]

I think you might be overstating the danger ⚠️ 😆

[@ANASSELHARRAQ]

wow hold on, is this what Escanor Rita axe made of? 😅,

[@devilfisher]

Fascinating mate, very informative! Thanks for listening to the intrusive thoughts and having a crack at the cells!

[@HBPowerwall]

My pleasure!

[@thomastallis7245]

This video makes me so nervous!! I was changing an iPhone battery many years ago, but I stupidly done it inside my house. I accidentally pierced the old swollen battery. Chernobyl style thermonuclear battery booms ensued! Luckily I was able to throw it out the window in time.

[@temporalisdelorme]

I used to work for Dell back in the Naughts, in their portable technical support. There was a span of time where they were shipping batteries that would randomly explode. As I recall, it was discovered that the company that made the batteries was careless, and allowed metal shavings to fall into the production line. At some point after a few months or a couple of years oh, some of them would simply burst into flame. There we're a couple of videos passed around back then of it happening

[@HBPowerwall]

ooh wow, that'd be kinda cool to see!

[@MrTechmoore]

Water is the way to go. Keeps the temp down and the reaction contained. Even better is to add vermiculite powder to the water. Cools it and prevents venting leading to thermal runaway when dealing with cells in series or parallel. Hydrogen fluoride gas is created by the venting and oxidization of the electrolyte. Use a little fan to create a soft cross wind to keep the gasses flowing out of your hobby shop... 🤪.

[@HBPowerwall]

Yes i believe water is the way to go, cheap & accessible. I use a large shop fan to create a hurricane with in my workshop - have to turn it off to record or you can't hear anything lol

[@sargentsakto9236]

Your nuts. Lithium metal is reactive with water. You store it in oil. I’m surprised that didn’t erupt in flames when he put it in water. I have even seen it explode.

[@HBPowerwall]

To be fair said lithium is sealed inside a metal housing. Cooling the cell stops the thermal runaway. It’s the lesser of two evils and is cheap and accessible

[@dannifeng8339]

Thank you for sharing the video. I don't understand why the cell is not short-circuit when the case is made of steel (B-) and connect to the cap (B+), do you know why?

[@BlackHeartScyther]

Would definitely like to see a more in depth look at those CIDs. They seem to be a common point of failure, weather or not the cell is actually bad.

[@HBPowerwall]

CID can go for many reasons, dropped - heat - cold, also over charging and possibly under charging.. well that's my understanding anyways

[@rdmd]

Nice, it was interesting to see inside the layers of a damaged cell

[@GadgetReviewVideos]

1:14 in the video and first thing I notice is this is rated for 4.35 volts. This cell is like a HV cell, if you system charges to 4.1. to 4runner.2 volts you would see the full capacity from these cells. These cells have a lower life cycle because they are pushed to a higher charging voltage and knows to fail in a short time. personally I would not mix these cells together with standard 4.2 volt cells.

[@alaskanalain]

They fit perfectly in a shot gun shell. What if you charge one up and fire it out? Probably won't be spectacular. I think I'm going to cut one end and fill it up with some smoke mix and fire it.

[@HBPowerwall]

lol sounds like an epic youtube video if it was done right hehe

[@MrHukd]

Great video thank you! Would have loved to see more on the cid tho and if its actually safe to pop this back when they have been activated

[@HBPowerwall]

Don't need a video to very firmly warn you against such an action

[@MrHukd]

@@HBPowerwall is it wrong to do? I've tried to research this but I'm getting mixed opinions hence why the comment

[@Kefe376]

Looking back, I remember as a child (around 6) that I managed to completely peel a lithium battery’s metal casing and was trying to make a mini plane out of the lithium foil inside. Very fun….

[@HBPowerwall]

Arr back when a paper cut was just a paper cut.. now it's a fb post, insta story, and a trip to the ER...

[@twigandroot]

thanks for the contribution. it's pretty eye opening to see an 18650 disassembled, and I don't have the guts to do it

[@HBPowerwall]

Thanks for tuning in

[@OverlandTT]

Nice video mate, does the 18650 basically have the 123A inside of it?

[@KooshiesElectronics]

Lithium and water create quite the reaction, A bit of what you were seeing at 13:55. Best to use mineral oil or lith-x to control lithium batteries.

[@HBPowerwall]

Yes, but how much lithium is contained in one cell? Water is the fastest cheapest way to cool the cell and stop or slow the thermal reaction.

[@KooshiesElectronics]

​@@HBPowerwall It does not take much, We have protocols in the battery recycling industry because of this and are not legally allowed to expose any lithium battery to the potential of getting wet. Due to the reaction between water and lithium being exothermic it may actually make it warmer. You're trying to cool any potential heat that has to do with a reaction that is accelerated by what you're trying to cool it with. Mind you getting an 18650 getting wet isn't inherently dangerous in most cases, CSA operates on theoretical. Kinda like putting out a fire with gasoline because its a liquid like water. There are some experiments on youtube that would probably surprise you.

[@HBPowerwall]

I find that to be true but once it's in a dangerous state ie thermal run away - Aussie fire department recommend WATER and days and days of it full blast to cool & kill the thermal reaction .

[@KooshiesElectronics]

@@HBPowerwall ​ @HBPowerwall Interesting, Would that just be because of the availability of water vs sand, mineral oil and lith-x, do you suppose? we place any runaway batteries in mineral oil and it neutralizes the reaction pretty fast, and it's inert to lithium. We have Lith-X that is specifically for lithium runaways but if we have nothing else we are expected to encapsulate it with sand. Thats what the CSA calls for but I'm curious to know what the Canadian fire dept would say about it. You can't really tell the average joe to put it in a barrel of mineral oil because who has that, and no one is going to know what Lith-x is. Sand is the most realistic to have "nearby" but still a stretch for many people

[@KooshiesElectronics]

The water full blast idea would be a dissipation strategy to control the reaction and would work especially at a point of runaway. the sand, oil, and specialty stuff are more of a neutralizing strategy to stop the reaction.

[@apnaagritech786]

Wow, good and enough information and technical knowledge .i fully support your art and skill to demonstration. 🎁💯🎁💯🎁💯🎁💯🎁💞💕♥️💯💯

[@HBPowerwall]

Thank you so much 😀

[@dustysparks]

I wouldn't think those cells would have a "seam", they'd be drawn into that canister shape from a single sheet like you would a cooking pot or a scuba tank or a sink. That's not to say that the source sheet from which this cell was drawn couldn't have had impurities in the metal that created a weak spot for failure at that particular line when the internal pressure built up to the failure point.

[@yayanarchy8394]

Yeah, it would take far more machine time for them to roll a sheet into a canister and perform a secondary operation to form the bottom. These are basically definitely manufactured the same way ammunition casings are drawn from brass.

[@TRICHOMETRIST]

The gas off had enough pressure to blow the seem?? Internal resistance is measured in ohms ?? Sorry bout all the qeustions but it's not boring!! Always wanna see inside!!!😎

[@twotone3070]

Big Clive found that the lithium spontaneously combusted when all open and just powdered on the bench. He has the "Explosion Containment Pie Dish" a vital safety device.

[@HBPowerwall]

Hence I used dead flat cells - i was under then impression part of their combustibility was from the SOC

[@keayrhyasen1154]

i think the show How It's Made had an episode showing how High Voltage to Low Voltage Transformers are made these days. looking at you taking the 'innerds' apart reminds me of that show. maybe these batteries work in the inverse; convert low voltage to higher voltage.... after all, copper don't know which direction current 'needs' to flow, it only knows current flows.

[@unk_48]

But why when I open positive of the 18650 battery, instead the lithium liquid is out bro? Whether the battery is already leaking?

[@HBPowerwall]

I didn't think they contained 'liquid'

[@PeteTum]

thanks it was educational and definitely not a waste of time

[@HBPowerwall]

Thank-You for the comment.

[@TRAVDOG-pg3cm]

good thoroughness brotha

[@HBPowerwall]

ty

[@AMAL_AMPZ]

Thanks for the video ✨🙌

[@HBPowerwall]

You’re welcome 😊

[@lemagreengreen]

I like how you made special effort to make your bench conductive 😂

[@HBPowerwall]

Meh, the wife in a deep blissful sleep is more dangerous than this..

[@ewetoobz3840]

Dell had a bad bunch of battery packs a couple of years ago that were expanding in the laptop. They went so far as to do free battery pack replacements for out of warranty laptops. From what I can find it was the 84Wh packs. I couldn't find any date code info but it may be something for you to look into. The model in question was the XPS 15, maybe that will help your search? I wouldn't bother doing any more cells autopsies, I don't think it's going to give any revelations. Research the cell history instead (is this one of them that Dell had problems with?). Good work, by the way!

[@HBPowerwall]

I'll look into that this week if i get time and if i find anything i'll consider doing a quick video - thanks for the information

[@matthewordinario8783]

How to cleanup the leaky electrolyte?

[@HBPowerwall]

place cell into bin.. job done..

[@polrich-p8i]

What tool are you using around 6 minutes? It looks perfect to open it, but never seen one like that.

[@P9-AUSTRIA]

copper pipe cutter

[@HBPowerwall]

yep pipe cutter

[@b00marrows]

Bit of an oddity for sure. On a wild guess i might say maybe just the casing was damaged. If there was pressure on the top and bottom of the cell, the casing might have just given way, splitting on the seam creasing the metal as it bulges outward.

[@HBPowerwall]

There are no physical signed of damage.

[@b00marrows]

@@HBPowerwall I'm unsure on it, but it might not take much pressure in the right position on the tips of the casing to cause the seam to split like it did. You could test this on another dead/bad battery, see how the casing behaves.

[@wreckless_-jl6uu]

very nice, Pete! love your content brother!!

[@HBPowerwall]

I appreciate that!

[@CursedSouthwest]

I like how you do this in a safe mettal box instead of a wooden house

[@HBPowerwall]

Shipping container.. actually worked out really well so far.

[@PerthfenceAu]

Im wondering if you resleeved the cell? Meaning did you run a stanley knife down to take off the old plastic sleeve to put on a new one and was the break.in the cell caused by running your stanley knife a bit too hard?

[@HBPowerwall]

No it was all factory.

[@myhomelab]

What is the price you buy the old laptop battery.i do same work i want to only check what is different of price in your country

[@HBPowerwall]

they are almost free again now - LFP are so cheap and accessible in my area

[@Immense_blader]

how did you cut the side wall vertically?

[@user-2uf2kr2c]

Hello, is that very thin copper sheeting..? Regards

[@HBPowerwall]

really thin copper from memory

[@joshcorn2021]

ha ha, you bloody legend, i have watched a tonne of your videos now, really enjoyed them. :D Cheers

[@HBPowerwall]

Glad you like them!

[@Zoey_yea_boom]

I think something expanded in the cell will we know what caused it. Probably not would like someone to chime in here. But pulling apart the cell cool as hell.

[@HBPowerwall]

IF that happened would have expected to see damaged or malformed internals

[@neoben00]

Goes to wash his hands and finds out they are full of spicy soap.

[@HBPowerwall]

Smells so sweet lol

[@sevvi203]

Mate I have a power bank that I neglected to charge well I really forgot I had it, it wouldn’t charge when I tried so I took it apart and the cells are all less then 1 volt. Should I just toss them or try to boost charge them. I’m really terrified I’m going to burn the yard down so i don’t know what to do, plz help

[@HBPowerwall]

Knowing what i know now I would replace it, just from the safety aspect

[@sevvi203]

@@HBPowerwallokay ill replace it. thank you

[@zhengguangzhu6263]

What is the name of the tool you used at 6:28?

[@CTimmerman]

Try adding a curtain, foam, mattress, or pile of pillows next time to stop the echo.

[@HBPowerwall]

or just not do it in a shipping container lol

[@jodycompton8559]

Thanks for the videos..... hope you can help with this question: Have 18v with a charge of 15.97v. It won’t take a charge for the charger(green light just keeps flashing-which means charging) and it won’t discharge its power. Simply doesn’t work any more. I’ve tried boosting its charge for a couple minutes and still will not work on charger. Hope you can help Jody

[@HBPowerwall]

Sounds like BMS is faulty..

[@jodycompton8559]

@@HBPowerwall do I just buy another battery? Is the BMS something fixable?

[@HBPowerwall]

I have no idea sorry - you'd have to take it to a local professional for a physical inspection..

[@yuriselektro2236]

Nice information

[@HBPowerwall]

Thanks

[@madhusudangupta3661]

What of the ingredients of the Lion cells are recycled?

[@HBPowerwall]

I think they all could be recycled - its just weather it's worth it or not..

[@elemcons]

Wonderfull video. It is a class of reverse engineering. Marvelous! I whish you could go deeper on the mater. Congratulations!

[@HBPowerwall]

Many thanks!

[@robertn2550]

just like diffusing a bomb? Do you cut the red wire or the green wire?

[@HBPowerwall]

Only on TV lol

[@MrConspark]

They look like my work gloves ie well used. Interesting Spiral wound cell, thats how they pack the power in them 🤓 Good video once again.

[@justtinkering6713]

So is CID -CELL INTERFACE DEVICE ,CELL INTERCONNECT DEVICE?

[@alessandrosuppini943]

It was interesting but I have to tell you the grey stuff that was packed inside the coiled film is highly toxic and not easy to dispose. My advice is to clean properly all the surfaces you have worked on and call it a day regarding opening other batteries! Better to do a tour in one of the manifacturing facilities to learn how they assemble them 😉

[@originalmianos]

Not highly toxic and can be disposed of in regular waste. These are lithium ion batteries not nickel cadmium or such others. I would not eat it but it's not a huge deal aside from the dangers of heat and fire.

[@alessandrosuppini943]

Rob Fowler Ah ah, yeah, I wouldn’t eat it either!

[@stressmasterbk4294]

The only danger beside eating is if it was on fire you DEFINITELY don't want to breath the smoke.

[@rokeyraj129]

Nice knowledge sir

[@HBPowerwall]

So nice of you

[@igormoreira9978]

Incrível a quantidade de baterias que você tem.

[@jackvoisin5585]

How Have you laptop computer Dove vai trovato le batterie da computer?

[@steve64464]

The Cid cant really blow when the cid is pressure dependent on blowing and there's a gaping hole in the side of the cell which contains that pressure , Must been quite some pressure inside the cell to push it open like that in the first place. Usually when i rip apart a cell like that i save/collect the tiny aluminum rod from the center :-D

[@HBPowerwall]

wondered what the rod was in the center .. looks like they would be easily recycled there is a bit of copper in there as well.. need some accurate scales and rip apart 100 and see what you could salvage from them

[@steve64464]

@@HBPowerwall Im guessing the copper/aluminum amount within is not enough to justify some operation of recycling on that level along with interesting chemicals of health damaging properties. I just ended up collecting them they have this ultra thing line in the center of them so you can slide paper in them easy , I also collected a few CID caps to poke and prod in the name of science ;-)

[@HBPowerwall]

Didn't think of the nasties in there ...

[@steve64464]

@@HBPowerwall Yeah i once had a leak from a CID reset experiment when you poke something into the cid to push it back down and restore functionality id accidentally punched a hole though it, A chemical substance came leaking out during charge and it seemed to eat metal leaving a rusty corroded effect.

[@ronknight1010]

Still interesting as always. Keep it up Pete

[@HBPowerwall]

Thanks, will do!

[@175726]

Very interesting, thanks for the video

[@HBPowerwall]

My pleasure!

[@Patriot-hz8xk]

Wait, so what do you do with hundreds of all those 18650 batteries?

[@HBPowerwall]

10000’s

[@Patriot-hz8xk]

@@HBPowerwall what do you do with them?

[@bjiirn]

I had something like that happening with an LG INR18650-MJ1 cell. However my cell still worked fine with the crack.

[@HBPowerwall]

In theory is should work if charged. Just not well or safe.

[@kelvinkhan9719]

Man u have just what i need

[@HBPowerwall]

Great looks and a witty outlook on life?

[@davidgibson6909]

Good grief, how do you get all the laptop batteries to do all this?

[@HBPowerwall]

Very lucky mainly... right place right time!

[@offgridwanabe]

Well done Pete you are braver than I. After I saw how fast the reaction is when one of mine blew I would never use bare hands as it would not get warm it would just be on fire very fast reaction. I was surprised at the water as there was no reaction totally not what I expected. Thanks for sharing as my curiosity is not that great or my chicken is lol......

[@HBPowerwall]

water thing as i understand it would have been different with a fully charged cell

[@janne-mans8295]

You seem to have missed the protective chip assembly on the bottom part, that you cut off. Actually the plastic cover consists of 2 layers. There is a thin metal strip running like wire from bottom to top between those layers. It seems you entitely missed that because you did not start cutting the bottom part first prior to removing the cover. You need to cut the bottom off with the cover still on and just with a knife, that does not run trough a metal wiring strip or metal hull.

[@janne-mans8295]

m.kzbin.info/www/bejne/fmiYlIyMl9uFr9E This is an example of the side strip attached to protection chip assembly on the bottom

[@HBPowerwall]

the CID?

[@janne-mans8295]

@@HBPowerwall Did you watch the video link? Seems contained in bottom section is load resistence sensing circuitry, that can be fooled by pushing down back on the top sealing filament But the real protective stuff is concealed at the bottom. If taken out, a seemingly dead battery is unprotected, but should take charge again, probably even more than without CID. Most devices and charging bays have their own disconnecting built-in safety circuits. This is what refurbishers do not want the public to know, let alone manufacturers. Please watch the video link

[@kennith.]

Was still fun, thank you

[@HBPowerwall]

Thanks for tuning in.

[@Swenser]

Please rip apart and compare the high current version found in high performance power tools v the lower current laptop versions. I'm guessing thicker plates and more of one type of chemical.

[@HBPowerwall]

I might do if I feel the need to start tubing again - at the moment I'm taking a probably permeant break from creating content.

[@kevinbreslin5718]

Do you have any cells from the same pack the bad one came from? Taking one of the same 'batch' might. Tell you something

[@HBPowerwall]

If i do it'll be tested in the next week or two at the current rate.. all testing is now in the shipping container

[@sean-yy9ez]

where the hell did you even get that many laptop batteries lol

[@aniketgiri1153]

How do you know all these things. Where do you learned all these...?? It's impressive ❤️

[@HBPowerwall]

I'm a KZbin queen, I just watch, learn then try & hope i don't blow shit up in the process!

[@DrN007]

So unlike LiPo batteries, these don't come with builtin protection circuitry?!

[@HBPowerwall]

they have a CID i guess

[@jolinolin1797]

Tq 👍🤝

[@HBPowerwall]

Thanks

[@Buzzhumma]

I have been told its acetone mixed with other stuff !

[@batterymooch]

Electron Proton Neutron Mouron no acetone. But there are organic solvents with a lithium salt dissolved in them. Still nasty stuff though!

[@Dazzwidd]

Compressed Flames, just itching for freedom

[@HBPowerwall]

weeeeeee....

[@Dazzwidd]

@HBPowerwall You won't be sayin weeeeee when they get out boi! You'll do wee in your pants

[@MmeHyraelle]

Yes this is interesting because it gives more hope for recycling these cells is doable. Just need them to be dead and void of much voltage.

[@HBPowerwall]

bucket of salted water for a few hours on a discharged cell works perfect. BUT not ideal

[@AT2Productions]

Your batteries started venting? You don't fucking say. It's almost like a professional who's worked with batteries, charging and recharging them, told you this would happen.

[@HBPowerwall]

Heaps of professionals on youtubes, i'm just a guy with practical experience - and after putting Tens of thousands of cells though this is the first time I've seen this.. Bet most of the Professionals here haven't seen the cells I have in a month lol

[@AT2Productions]

@@HBPowerwall Electrical Engineer for 13 years, 6 years as a avionics tech in the Navy before that, with most of the past decade dealing with batteries, battery management, power management, and control circuits. I'm not surprised that you're getting increasing failures from suspect cells and damaged outer cores (some of that damage YOU caused by cutting into them). Tell me, what happens when you put multiple cells in series and have a weak one that can't hold it's charge in the middle, what is the end result?

[@chocolateriapucon1522]

thanks !!!!!!

[@adnanmlivo5885]

Good cell needs to have the lithium layer on the copper electrode and the aluminum one. It usualy does not come of that easy. And the cell looks dry so probabbly that s why.

[@HBPowerwall]

Thanks for the info - was bone dry

[@Sarge92]

what happened to the water when you was done something about lithium in the water supply dont sound kosher

[@Jimmeh_B]

I noticed about 1/3rd the way into the wrap there was what looked like burn marks along the bottom (neg end) of the foils. I haven't see that in the one's I've dismantled. Probable it shorted and pressurised and for whatever reason (damaged case or faulty CID), split.

[@HBPowerwall]

Sounds possilbe

[@blueberrytigerfox7699]

How many li-ion battery you have I'm amazed 😮😲😶

[@HBPowerwall]

perhaps 10,000 in use

[@blueberrytigerfox7699]

@@HBPowerwall 😶😶😶😶😶

[@briannam1642]

me during the video "😮" this is really intresting😂🙃

[@HBPowerwall]

what about after it ?

[@arthurhedler]

If the battery is well discharged it is almost impossible for it to catch fire! The danger is if the battery is charged!

[@HBPowerwall]

More danger cutting my fingers lol

[@oldtimeengineer26]

The cell with the spit was most likely because of a seam when one roll of metal is connected to another and just failed because of a bad weld on the seam most likely just dried out over time and stopped working

[@batterymooch]

old time engineer I believe these cans are stamped (drawn) from disks and are seamless. I’ve never seen a seam in the thousands of round cells I’ve tested. A seam would just act as an uncontrolled failure point that would “compete” with the venting disk.

[@MRLAW243]

Thanks for sharing at least

[@HBPowerwall]

Thanks for watching!

[@Buzzhumma]

Once the electrolyte evaporates the ions cant migrate to discharge.

[@markwagner5377]

I did it the same way and it took off like a rocket and burned red hot for at lest a minute 😢

[@EFDawahWiseSmile2LanternDen]

wow never knew the possitive and negative are seperated by 1 mm lol

[@generalawareness101]

I have a question I can't seem to get any help with, but how would I go about not charging an 18650 battery until it needs it (drops below a certain voltage that I set) when it is always connected to a TP4056 board? Using solar power so when the sun is up it will want to charge the battery even if it doesn't really need a charge which shortens the life of the battery. For instance my load is 300mah and on for 5 hours while my battery is 3400mah. As you can see it would only need to be charged once every two days (especially since the charge will be 1a so done in 3.4h). Saves the life of the battery etc... Not sure how to do this, and apparently no one on Reddit, or anywhere else I have asked, knows (or worse cares to know).

[@milkhbox]

Have you looked into solar charge controllers?

[@citizensteve6713]

To answer your question. Yes. Distinct lack of fire and lots of. More dragons next video Pete.

[@HBPowerwall]

*orders dragon..... ** mother in law arrived.... *** that didn't go to plan....

[@giantgigante7725]

I cud smell that lithium smell thrugh the screen ... I think ima have that smell linger for a week after watching this 👃😤😝😣😵😳🥺😷interesting you saved this cat from curiosity💆🏻‍♂️ 🙀👏👆👍

[@carlose.martinez545]

It looks like a big film capacitor.

[@HBPowerwall]

lol

[@gusmartin6053]

The layers inside did not look good. In my experience the layers should have a very uniform coloration. That cell had an appearance similar to corrosion. Also the copper looked like it was flaking apart. I have taken cells apart before and none have looked like that. It would be worth taking apart a "good" cell for comparison.

[@HBPowerwall]

I really should have pulled apart the other one to compare. Just clean forgot.

[@kiwiscanwifi]

Countdown - thats different

[@HBPowerwall]

something different for sure - i actually liked it

[@imchris1978]

I still think manufacturing fault maybe the case was extruded a little thin and possibly cracked along an adhesive line when it was removed that's why we test cells somewhere safe it always worries me when I see people posting pictures or videos and they are in lets say a spare bedroom with cells stacked high with a line of testers, remember it only takes 1 or 2 bad accidents and the powers that be will come down on us like a sack of bricks and regulate to the point it will be impossible to do this. stay safe

[@quagmire94]

some cells are iron, some are cobalt, Some are nickel its really wierd how some just use junk for batteries in those laptop cells , o these batteries are bad , put them in a low amperage laptop so they can slowly deteriorate, Make sure to re wrap then to look the same so customers dont freak out.

[@ragu4109]

No liquid electrolyte?

[@HBPowerwall]

I think the amount is quite small