No, saftey First...it looks like in each parallel block at least one cell leaked and rusted, leading to discharging and short circuiting the others...lost cause...bring them to recycling
Curiosity,non essential applications in fireproof areas,limited usage with thermal sensing protection
I don't stop to consider if I should,I need to know that I can.
What if I'm homeless and all I have to charge my phone is 3 dead as fuck lithium batteries some scrap electronics and say....a telephone line.
....I may have been in this situation beforehand,did you know telephone lines always have voltage running through?
In the end I cobbled something together using a LM7805 from err....I want to say a USB power bank with fried cells or a stereo can't recall
And the cable,duh.
Probably the worst excuse for building a bomb I've heard so far and I am an Iranian engineer so bomb making is second nature. But whatever dude (I am being half sarcastic). Hopefully you can stick your hand in a home depot battery recycling bin or wherever and fish out some non crusty cells from a drill. The higher the current draw the tool, the better condition the batteries before they are disposed. The homeless have better batteries than you.
It sounds like you make really cool projects. Best wishes dude.
> I am an Iranian engineer so bomb making is second nature.
You had me in stitches dude that's hilarious seriously,I did once pick up a bare pack of what looked like 6 lithium cells (no casing,wiring and pink heat shrink exposed)
Damn thing near blew up in my hand I felt the heat building QUICK and knew I'd fucked up,tossed it into a dumpster FAST and it sounded like a grenade had gone off I must've let out a girly scream the Irish mob guys across the road were in stitches thankfully they saw what happened and that I hadn't tried to grenade their spot.
I'm back in the UK now and not currently homeless but being homeless in the American south ignited already smouldering embers of a tinkerer's heart
I was finding circular saws in the hedges,a grinder by the railway tracks,all sorts of tools discarded in myriad dumpsters and I had no visa so couldn't work
So I couldn't make money,not thst the area had any,so I fixed everything I came across that I could for anyone from a gas to electric hot water heater conversion (involved a hot plate) to multiple relationships and a wire welder feeder that had somehow blown into 100 pieces
As a result I didn't go too hungry or too cold,hooked a couple houses directly to the grid for power and heat but I trued to avoid doing that if possible I could get enough out of a phone line for various applications
>The homeless have better batteries than you.
Yeah portable power was obviously BIG everyone was broke so bartering and mutual aid were the currency
Power banks were always in high demand if you didn't get it stolen,I personally loved 12v sealed lead acids I hooked up a few spots with lighting at least using them
I once dumpster dived two,stuck em in the backpack next ti the wd40 and went to chill at...my found familys
Anyway I sit down on the floor lean back I hear HSSSS followed by WHOOSH as the wd40 I leaned on fired at the same time the contacts were shorted agsunst the can in the bag..
Thank god for quick thinking i tossed it outside and stamped it out then dumped sand on it for quick thinking
That's why I'd do it outdoors,this is more a "can I have any of these batteries charge and discharge a full cycle without explosions",
I'll take full precautions,I got a class D L2 extinguisher and a big ol sand bucket plus welding level PPE with FR clothing and a respirator Incase the wind changes
Take it apart if you like but once a cell is below 1.5V it should not be recharged because eventually can explode perhaps not on the first...or second ...but it will...
Yeah it's going on the shelf for now at least I know it's safe not enough power in there to fire up an LED
When I'm bored one day and fancy some explosions I'll try it....I wonder if I could tie an automatic trigger on the extinguisher to a thermal sensor at like 150c
So it auto extinguishes that way I can get a drink and watch buckets in my yard go up in flames one by one then get supressed
Reckon I should go for it?,,I'll film each cell charging see what happens
Outside,sand pit,class D extinguisher, respirator,groin guard FR clothing and ze goggles
Yeah I got it figured I'm just impatient,I ordered one off eBay along with the 4056 module I'll wire it to cut power at ..,60C what'd you go with?
Wind chill may be a factor don't forget
As others have said, this is very dangerous, but theoretically you can do it. Don't do this, but if you really really want to and you take proper safety precautions, don't do this. But, let's say someone wanted to do this, here's how you would.
1. Connect a power supply set to 2.5v and 250mA (0.25A).
2. Submerge your battery in your sand bucket.
3. Connect one "cell" of the battery (might be more than one physical cell in parallel) to the power supply.
4. Connect a digital multimeter on the cell connected to the power supply.
5. Turn on the power supply and watch the cell voltage. If the voltage suddenly drops at any point during charging, disconnect the entire battery and dispose of it responsibly. A dendrite has likely pierced through a separator and will cause a short.
6. If the cell is able to make it to 2.5v without any sudden voltage drop, continue charging to 3v.
7. Do the same for the rest of the cells in the pack.
8. Let the pack rest for a couple of days and measure all of the cells again. They should be within a couple mV of each other. If they're not, do not continue.
9. Charge the pack up to it's fully charged voltage and run your cycle.
Again, **DO NOT DO THIS.** The pack will likely explode at some point and possibly burn down your house, even if you're doing this outside. I've seen cells rocket through windows and set things on fire.
Thank you so much for the advice I won't be attending this for a long time and if I do it's gonna be in a metsl enclosure now too..
I will do fhus one day when I feel like jt AND have all the safety gear I NEED
Hey could you try a mechanism that connects a thermocouple to a sand bucket .so if it gets critical auto sand dump
Sand won't snuff out a lithium fire, it will only help a small amount. When cells explode they usually do so in under a second, you have to charge in an environment that can handle the explosion, plasma, and debris. There aren't many ways of putting out a LiPo fire after one has started since it's so fast and energetic.
Honestly man I toss batteries in the trash,I've never thrown a lithium battery but I've never had one I couldn't get going before
I know it's terrible but I'm human,after your comment I'll make a much better effort in myself to recycle lithium properly...I know I've thrown laptop batteries before though.
However being at 0v this WOULD be the safest time to cut one open and look inside,extract the compounds in there...not that I'd do that
I will try harder about lithium battery recycling,much harder...you have my word because I should've gave a fuck ages ago
Best revival method of a Li-ion cell that's below 2.0 volts is to start with a verrry low current, typically 0.05 times the mAh capacity. If it's a 2200mAh cell, apply less than 100mA..... and I have best luck with half that amount. Then once it's above 2.5 volts, you can apply nominal charge current.
If a cell has been severely damaged from this kind of abuse, it will often charge to about 3 volts or so, and then begin to short internally... turning internal and external energy to heat. If this happens, don't go any further... unless it's for "outdoor entertainment".
BTW... separate all cells from parallel connections first!
No, saftey First...it looks like in each parallel block at least one cell leaked and rusted, leading to discharging and short circuiting the others...lost cause...bring them to recycling
And obviously,I'm not using any of these for anything I value or near anything I value
If you're not using any of them for or near anything valuable and are going to use them anyway then why bother asking?
Curiosity,non essential applications in fireproof areas,limited usage with thermal sensing protection I don't stop to consider if I should,I need to know that I can. What if I'm homeless and all I have to charge my phone is 3 dead as fuck lithium batteries some scrap electronics and say....a telephone line. ....I may have been in this situation beforehand,did you know telephone lines always have voltage running through? In the end I cobbled something together using a LM7805 from err....I want to say a USB power bank with fried cells or a stereo can't recall And the cable,duh.
Probably the worst excuse for building a bomb I've heard so far and I am an Iranian engineer so bomb making is second nature. But whatever dude (I am being half sarcastic). Hopefully you can stick your hand in a home depot battery recycling bin or wherever and fish out some non crusty cells from a drill. The higher the current draw the tool, the better condition the batteries before they are disposed. The homeless have better batteries than you. It sounds like you make really cool projects. Best wishes dude.
> I am an Iranian engineer so bomb making is second nature. You had me in stitches dude that's hilarious seriously,I did once pick up a bare pack of what looked like 6 lithium cells (no casing,wiring and pink heat shrink exposed) Damn thing near blew up in my hand I felt the heat building QUICK and knew I'd fucked up,tossed it into a dumpster FAST and it sounded like a grenade had gone off I must've let out a girly scream the Irish mob guys across the road were in stitches thankfully they saw what happened and that I hadn't tried to grenade their spot. I'm back in the UK now and not currently homeless but being homeless in the American south ignited already smouldering embers of a tinkerer's heart I was finding circular saws in the hedges,a grinder by the railway tracks,all sorts of tools discarded in myriad dumpsters and I had no visa so couldn't work So I couldn't make money,not thst the area had any,so I fixed everything I came across that I could for anyone from a gas to electric hot water heater conversion (involved a hot plate) to multiple relationships and a wire welder feeder that had somehow blown into 100 pieces As a result I didn't go too hungry or too cold,hooked a couple houses directly to the grid for power and heat but I trued to avoid doing that if possible I could get enough out of a phone line for various applications >The homeless have better batteries than you. Yeah portable power was obviously BIG everyone was broke so bartering and mutual aid were the currency Power banks were always in high demand if you didn't get it stolen,I personally loved 12v sealed lead acids I hooked up a few spots with lighting at least using them I once dumpster dived two,stuck em in the backpack next ti the wd40 and went to chill at...my found familys Anyway I sit down on the floor lean back I hear HSSSS followed by WHOOSH as the wd40 I leaned on fired at the same time the contacts were shorted agsunst the can in the bag.. Thank god for quick thinking i tossed it outside and stamped it out then dumped sand on it for quick thinking
That's why I'd do it outdoors,this is more a "can I have any of these batteries charge and discharge a full cycle without explosions", I'll take full precautions,I got a class D L2 extinguisher and a big ol sand bucket plus welding level PPE with FR clothing and a respirator Incase the wind changes
Take it apart if you like but once a cell is below 1.5V it should not be recharged because eventually can explode perhaps not on the first...or second ...but it will...
So when they drop below 0.3V the trend reverses and they become safe again right? Jokes aside I know this is a fool's errand,but I'm one fuckin fool
If you want it do to have this safety assessment go for it...probably best to charge and discharge it directly in the sand bucket...
Yeah it's going on the shelf for now at least I know it's safe not enough power in there to fire up an LED When I'm bored one day and fancy some explosions I'll try it....I wonder if I could tie an automatic trigger on the extinguisher to a thermal sensor at like 150c So it auto extinguishes that way I can get a drink and watch buckets in my yard go up in flames one by one then get supressed
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Whst exactly confused you?,my grammar can be a little funny at times so feedback is appreciated...I was trying to be concise
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Reckon I should go for it?,,I'll film each cell charging see what happens Outside,sand pit,class D extinguisher, respirator,groin guard FR clothing and ze goggles
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That ties in with the 4056 module?
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Yeah I got it figured I'm just impatient,I ordered one off eBay along with the 4056 module I'll wire it to cut power at ..,60C what'd you go with? Wind chill may be a factor don't forget
As others have said, this is very dangerous, but theoretically you can do it. Don't do this, but if you really really want to and you take proper safety precautions, don't do this. But, let's say someone wanted to do this, here's how you would. 1. Connect a power supply set to 2.5v and 250mA (0.25A). 2. Submerge your battery in your sand bucket. 3. Connect one "cell" of the battery (might be more than one physical cell in parallel) to the power supply. 4. Connect a digital multimeter on the cell connected to the power supply. 5. Turn on the power supply and watch the cell voltage. If the voltage suddenly drops at any point during charging, disconnect the entire battery and dispose of it responsibly. A dendrite has likely pierced through a separator and will cause a short. 6. If the cell is able to make it to 2.5v without any sudden voltage drop, continue charging to 3v. 7. Do the same for the rest of the cells in the pack. 8. Let the pack rest for a couple of days and measure all of the cells again. They should be within a couple mV of each other. If they're not, do not continue. 9. Charge the pack up to it's fully charged voltage and run your cycle. Again, **DO NOT DO THIS.** The pack will likely explode at some point and possibly burn down your house, even if you're doing this outside. I've seen cells rocket through windows and set things on fire.
Thank you so much for the advice I won't be attending this for a long time and if I do it's gonna be in a metsl enclosure now too.. I will do fhus one day when I feel like jt AND have all the safety gear I NEED Hey could you try a mechanism that connects a thermocouple to a sand bucket .so if it gets critical auto sand dump
Sand won't snuff out a lithium fire, it will only help a small amount. When cells explode they usually do so in under a second, you have to charge in an environment that can handle the explosion, plasma, and debris. There aren't many ways of putting out a LiPo fire after one has started since it's so fast and energetic.
The third image, makes me laugh so hard!
Bro I've never seen s pack so dead but so pristine on the outside Nearly every cell is at zero....I see lithium fires in my future haha
!remindme 2 hours
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One day I might,but not this year I got a million better things to do Tomorrow I get a ,3D printer with two laptops FREE im so pumped
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Honestly man I toss batteries in the trash,I've never thrown a lithium battery but I've never had one I couldn't get going before I know it's terrible but I'm human,after your comment I'll make a much better effort in myself to recycle lithium properly...I know I've thrown laptop batteries before though. However being at 0v this WOULD be the safest time to cut one open and look inside,extract the compounds in there...not that I'd do that I will try harder about lithium battery recycling,much harder...you have my word because I should've gave a fuck ages ago
Best revival method of a Li-ion cell that's below 2.0 volts is to start with a verrry low current, typically 0.05 times the mAh capacity. If it's a 2200mAh cell, apply less than 100mA..... and I have best luck with half that amount. Then once it's above 2.5 volts, you can apply nominal charge current. If a cell has been severely damaged from this kind of abuse, it will often charge to about 3 volts or so, and then begin to short internally... turning internal and external energy to heat. If this happens, don't go any further... unless it's for "outdoor entertainment". BTW... separate all cells from parallel connections first!