Melting metal with Batteries
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- čas přidán 9. 07. 2024
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A. Batteries work better at this time, caps are rare and expensive devices that are very good at doing things not needed for storage systems typically.
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Bought 4 of these headway cells to replace a small 12v agm battery in a gate opener for driveway. Installed about 1 month ago, charged by solar panel. So far works great. These cost just a bit more than the agm from Home Depot. Thanks for your inspiration! Keep up the good work!
a
Maybe we'll start selling wrench fuses lol
Oh that made me Lough a bit
LMAO!!!
HaHa Jehu you're becoming ... photonicinduction, except he'd do it inside the house, on a RUG no less!
luckily for Jehu's neighbours, by using battery power he wont dim all the lights on his street like photoinduction used too!!
He popped it!
He's missing the three purple dots in the camera, though. I cracked up upon reading this. Might as well throw a wrench between two bus bars
i hope photonicinduction is ok i miss seeing his videos
Photons goal every time was to put a burn in the rug
Holy headway batman, that's a hot wrench.
I would not have thought the wrench would be the weak link in that setup. Awesome demo!
really cool! this means that if there is a shortcircuit the cables will melt before the batteryes start to ge hot or go to low voltage levels!
time to test your snap-on lifetime warranty lol
Awesome! This is exactly what I was looking for!
Wonderful video Jehu thank you so much. You inspired me and I bought 44 cells a few months ago. Been learning, researching first and experimenting for my 13.8 volt system and turn on the 120v side when I need it for appliances. Wonderful demonstration showing the power and need to be extra cautious figuring out the right way to set a pack up. Like 4 parallel 10s @ 3.2v then the four in series with 4 charge managers. I don’t think you can keep these perfect balance without the expensive individual bms system. But they stay consistently the same surprisingly in a 13.8 4 pack. I ordered one 4S 150 amp max discharge and 40 amp max charge manager for $3 to do some 4s tests. I would feel better researching like a 40-50 amp max diode for the positive cable out. Happy building
Nice demonstration of the power of batteries, thanks.
I Took fun to calculate what current could happen here !
According as what I see you have forged steel, it means approximatively :
0.13 Ohm*mm²/m you have around 0.2m of it with around 8mm²
Approximatively 0.08 Ohm here
Steal is about 470J.kg-1.K-1, to simplify here, we will take 100g of steel (0.1kg)
As you shown melt is about 1370°C
you have at 20°C to travel 1350°C
(0.2*1350)*470= 126900 Joules
to make it as Wh we divide by 3600 = 35.25Wh , means 2115Watt in a minute
It took about 1:25 mins to melt it ; approximatively 1493 Watt in this duration where we can add 20% for loss = 1792W
PJ = R*I²
I²=PJ/R
I²= 1792/0.08
I²=22400
I= 149.7A
Your meter doesn's seems that far away !
This is the silly stuff I subscribed for. Thanks Jehu!
Great video hands down trying to make my own setup for melting scrap any tips?
So awesome, quality video. Bravo mate
I particularly enjoyed the arcing toward the end. Even at 3 volts, that's a ton of power
Great video!
tyvm for the nfo, one more question if possible, whats a good bms for a 4s 8 battery 14,x battery pack using the above batteries
Give us more videos like this. It was fun to watch melting stuff
This are the type of vids i like
Joined the Super Battery Club yesterday. Well made my order anyways. LOL Looking Forward to using 8 in a DO STUFF Portable Power System. Camping, Emergency Battery System. Solar Chargeable. What Hoooot !
can I knw where do you buy that//??
need it so badly
man, missed opportunity there. on the negative side of your battery pack that would have been one of the few acceptable uses of flathead screws
@jehugarcia Why was the forged steel wrench the 'weakest link' ? Not the cables, connectors, or sleeves surrounding the cables, etc ? Thank you!
Higest resistance in the circuit. Copper is a very good conductor
how long would a 8 cell pack be able to do 120 amps
Hi grate video, I new a micanic a couple of years back and he accidentally bridged the terminals of a lead acid battery with a a wrench and his gold wedding ring the ring was instantly melted and ran off his fingers he was left with a scar on his ring finger and a smaller one on the fingers next to it so please don't have eny metal on your hands or wrist. He is still working with big batteries now but gives them the respect that they deserve
No but I have soldered with 2 carbon rods from zinc carbon battery's it was not the best but when you're back is agenst the wall you do what you have to
Grate.
How could you make it work faster
hi which one is the best pk100-12 100ah = 168 usd or batery?. thank newbie here
Nice video! You could measure the current flowing through just one of your red leads and then double the current reading to help prevent overranging of your ammeter. If both of your main wire leads are the same length and connected well then your total current should be roughly twice that going through a single wire.
That was impressive!
Leave it to your dad to be wandering around the danger zone
Awesome video. Wow.
If we use a 40amp bms with 12v battery pack of these headway lifepo4 batteries
Is it would be safe to use these in DIY electric skateboard
what thermal camera do you use?
You one crazy dude😅 ! Great experiment, now I know what to use for my project .
Can you deliver to ROMANIA ?
What is resistance of the wrench. You can calculate amperage if you know voltage and resistance
Where can I find these cells? I need a few.
Have you tried welding with a similar setup?
Don't see why it wouldn't work. When I was in Iraq you would see the Iraqis using just regular car batteries and jumper cables to stick weld all the time and these little things put out way more amperage!
I need your help. I want to use it for car start battery replacement. I have Protection Board where (P-) is to Load (-) and (C-) is Charger (-).
Q: Where do I connect (C-)? Is it direct to ground? Or I Have to use DC to DC charger, where I have to connect Protection Board (C-)?
You are brave my friend!
incredible batteries. even in short they mantain the voltage or even increases it. are those good for deepcycling or those are design for high current situations. is good to know if a long discharge damage the battery like the car cranking batteries. thanks for that good and fraaking experiment.
They are good for about 80% of their capacity. So fairly deep discharge. I would do your research before converting from lead acid. They won't hurt you, but you could hurt them if not used properly.
Thanks. i`m researching some data and saw from amateur radio remote users to car audio high current competitors and electric go kart racing. Very safe i`m impressed. but by the other side is the price, a powerwall of this kind will cost a fortune and finding a big BMS high current should be expense. but for small projects like a 4S - 4or5 P, 12 volt portable generator with inverter should be a good setup.
Excellent starting batteries! 2 x 3S + BMS would be the top to start most of the "civil" engines
For really cold climates I prefer LiFePo4
How much 18650 batteries will it take to match it?
So it's safe to say that if I use the exact same batteries 12 of them (4 in parallel)×(3 in series) at 10am each should be more than enough to replace a deep cycle in my camper?
When assembling the cells they go positive to negative why don't they short out ? My mind is boggling
These cells are insane so glad i got 16 of em xD
I don't need to melt wrenches, I need an RV battery. How do you connect a bms to 4 of these so I can get 12 volts? The only bms I can find is $350 and that for prismatic cells.
This battery stiff is so frustrating, it's like trying to fit pieces of a puzzles but all the parts are from different sets.
Just connect them in a 4S arrangement, and then connect a regular LifePO4 BMS.
A big like ... Make you ( any sane person ) stop and think... Had to watch it twice
Hi, funny to see what they are capable of. Normally these type of current measurement devices are current transformers. So a givven number of measured current results in a corresponding output current. 1/100 for the smaller models up to a few hundred amps (like yours) and 1/1000 for the bigger brothers. So you have to check 2 things. Is your thingy anywhere capable of measuring your mega current into something useful and if yes, did you use a matching load-resistor on the Measurement output. Good luck. Keep up the good work.
I wonder if your skin is conductive enough to pull some of those amps should you dead short the pack with your hands?
cool
where do you get the current measuring thing?
Thats called an amp clamp.
good test and destruction!!!
can these be used to make a powerwall?
Yes
Wow LiFe POwerful
great.
You started and ended with 3.4V open circuit and this cells have an internal impedance around 2.5 to 3mOhm so DC internal resistance around 5 to 6mOhm thus using 6mOhm (6mOhm/12 cells = 0.5mOhm) your peak current when connected can be calculated as 3.4V - 2.8V = 0.6V (peak drop at initial connection) 0.6V / 0.0005Ohm = 1200A that rapidly dropped about half 600A at minute 5:00 in the video.
Ahh just saw this let me take a crack at this. OK Hedway gives single cell impedence as 0.004 so 12 parallel = the reciprocal of (1/0.004) times 12 is 0.00033 ohms Next the wrench which is about the same resistivity as Chrome Moly 6 inches long and 8mm thick (if round) has a resistance of .007. 3 feet of AWG 2 cable is about 0.001. the vise grip on terminals about another 0.001. Looks like you are using a 50mv 500A shunt (your reading is off by about 10X so maybe it's a 50mv 5000A? IDK) which has a resistance of .050/500=0.0001 which all adds up to a total resistance of 0.00243 ohms. It looks like you're measuring voltage at the battery of around 3.1V so Amps should be in the range of 3.1/.0.00243=1275 amps. so yeah that makes sense. What shunt were you using anyway? 5000A? that would change my numbers somewhat. Hmm I included the battery internal resistance in the load but electrodacus included it as the battery separately. need to think about this. It might have been faster to connect 6P-2S and got twice the voltage at the expense of higher total resistance of 0.0343 ohms with 6.0V/0.0343ohms=1747Amps which is about 300A per cell
Impedance of the cell is measured standard at 1kHz (so is not the same as DC resistance) that is typically higher as battery has also some capacitance so impedance number is lower than internal DC resistance.
You do not need to know any of the other resistance value in the circuit as they can be highly variable and all you need to know is the battery internal DC resistance and voltage drop across battery that is measured in this video correctly. Knowing the voltage at all points during the test so can calculate the voltage drop across the battery and the internal DC resistance of the battery you can calculate the current going trough the battery that is the same with current trough any part of the circuit as they all connected in series.
You can imagine the battery as an ideal voltage source in series with a resistor and as soon as you can know the internal DC resistance and voltage drop across battery you can calculate the current as I did above.
There is no current shunt in the circuit but there is what looks like a hall effect sensor and that is probably rated at 100A thus as the current is at all times higher it will only indicate 126A as that is the max it can measure.
@@electrodacus I know this was ages ago, but I just wanted to note that it was a nice concise primer of applying electrical theory in a few ways I hadn't seen demonstrated before. Thx! On the off chance this gets read: I was just curious if you knew of a simple way to measure resistance with a "multimeter" like the one I'm presently cursed with that can only measure voltages (busted junk), is that perhaps possible with any degree of accuracy?
@@kurtilingus Do you mean resistance of a lithium cell or resistance in general ?
For measuring a resistor you will need a known voltage supply maybe a 9V battery and you will need to know the internal resistance of your voltmeter or calculate that first based on a known resistor that will be in series with the voltage supply and voltmeter.
@@electrodacus Ah! Yes indeed, I was referring to making arbitrary resistance measurements in general, so thank you for the insight! Very helpful of you.
How hard would have been to stick a meter across the wrench and check the vdrop
Pretty hard my probes would have melted
I see they are not Rated for Very Cold Weather. Wondering how they would do "for real" In -40 Weather seeing that's how cold we get where i am from.
Lithium does not like to be frozen
jehugarcia bro I need you number I'm from India
Bobs
was that a non copyright music on backround from the intro cause i wanna use it for a video and what is the name?
No I pay for music using epidemicsound.com
oh isn't it Lost You (Instrumental Version Tape Machines?
yes
That is one hell of a battery
what is that device you are using to measure DC current with specifically?
A current shunt.
Looking for a part number/model name haha. Yea it's likely a hall sensor of sorts.
Or www.kit.com/jehu I list everything I own there
I bought 8 of those and one failed as soon as I connected to my 24v inverter. Now there aren't anymore available the last time I checked. I'll look again, but never got an answer from the seller when I asked if there would be anymore available. At least one at the used price I paid for the others. Really high $ for new ones everywhere else I have looked!
He has some now but they won’t last
This is a Question for anyone really, how can I work out how many amps I can get from my battery pack? I'm making it from used laptop 18650 cells, I haven't made it yet, as I have 300 cells to check and we all know how much fun that is, haha, love the video's as always, in advance thanks for spending the time to answer my question. Brannen. Its the C rating I'm unsure of I know individual cells have a max discharge rate.
No way would it be that many amps... 2 gauge wire has a fusing 10s rate of 1300 amps.... So 1300 amps through 2 gauge will melt in 10 seconds... Your insulation didn't even melt...... I would peg it in the 275-350 amp range based on my experience as a welder. The resistance and heating of materials limits flow. Try a 3s4p and redue the experiment
I did a calculation on a comment :3 And I got about 149.7Amps with a lot of approximations, but with those calculations the meter looks right.
Jeiiyman87 definitely more than 400A my clamp meter reads up somewhere around 500A but it was overloaded every time instantly
You could do it again, but measure the amount of amps in the Cells, before the discharge, then measure whats left after?
Redew*
I concur with jeiiman .. 1200 amps on a little #2 wire looks like it'd kill it quick but lemme see cuz I've seen 2/0 gauge is best when welding with 350 amps ,, the wire is about one milliohm so at 1250 amps that's a power dissipated in the wire of I-squared R of 1250*1250*.001 or 1562 watts which would heat up the wire very quickly. because the wrench is about 3 times the resistance it should get about 3 times as hot so maybe. Jehu said the clamp on was pegged at over 500A but run that by me again what the other ammeter was measuring, Did you have it dialed in right for the shunt you were using? and yeah I'd try it again with 2S-6P and use 2/0 wire. and a SK wrench lol
CRAZY🤘🔥
Can i have my spanners back now Jehu ? O.o LOL
Why aren't theses cells used more in things?
ADSlammer maybe the price point. I’m m going to start looking for some.
Cost
The wrench is at more than a thousand degree celsius but your damn camera still shows 330 degree celsius
Amazing battery. Battery temperature seems not raised even in short.
This Video makes me so jealous....
I live in Germany and these cells are crazily expensive around here.
Europe taxes, I know that I live there too :p
Hope that the future will let us build good things in not so expensive way.
www.evassemble.com/index.php?main_page=index&cPath=2
@@jobeyoung I do know where to get these cells but 1 single cell already costs 34 $ shipping (Taxes not included)
Can someone explain to me why manufacturers measure the capacity of their batteries in mAh??
Hello, I htink it's to trick the customer, and also give an idea of the discharge in optimal circumstances, you can't attack them for that. If they did in Wh they could much easyly be sued.
As opposed to what?
Iván Luis Rodríguez because with simple math you get the total energy amount stored in the battery.
@@SirCrest ...as opposed to Ah. Measuring in milli amp hours is a marketing ploy. It is far easier to understand amp hours eg. 1400mah = 1.4 ah
Oh yea, I didn't know if that's what he was talking about.
Hey Jehuey You Es Muey Loco!!! LMAO!!! Maybe You Should Of Named This Video "How To Bend Your Wrenches When You Don't Own An Acetylene Torch?" Thanks!!!
I think you really needed thicker cables to the wrench.
Next a take off point in the middle of the cells and copper plate not aluminium.
Holy Mother of Hot Plasma. & this is why you are my Favorite CZcams Subscription!
Lifepo4 is the POwer for LIFE
Light saber version next!
I’m surprised more people aren’t experimenting with the large 200 amp flat cells
Bought 7 sets of those Headways :D Thanks Amerman... err now all I need is a 7S 250amp BMS EKK WTF do I get one of those
I guess they don't do an on board BMS solution as big as 250amp then, or if they do, I cant find one. Looks like I'll have to hash together some mish mash of components then to trigger an off board disconnect. Aaarghh
Why are your controle devices so far off?
Because you need specialized equipment to measure 2500f and 2000A
Now somebody is going to build a welding rig, uses these cells, people have been stick welding with 12v batteries for many years
Now it's time for a DIY lithium powered welding
I think your amps as right, that was a slow heating up, steel has higher resistance than copper wire
0.024ohms with a 3v power equal 125 amps, the slow heating to the melting point, and it really didn't take very long to get there
Good welding can be done at 100+ amps and 12 to 18 volts,
it's possible, but very difficult at lower voltages. Most of the time when people stick weld in the field with battery's they use 2 or 3 in series.
The actual voltage needed to weld is typically lower then what's used to start the arc. It may be possible to get a decent weld at 12v (not sure, i've never tried), but it would be very difficult to start and maintain the arc with such low voltage
youtuber kreosan already made an portable welder.
@@_DSch yep
300 amps :o what kind of impedence is that
Why not use these for a powerwall
Why not
At 4.2 volts the power is immense.
Hola Jehu , en el minuto 4.0 ya pasó de los 700 grados centígrados
Did you see the magnetons escaping the metal? Ed was correct!
Cool. And thanks. I love these batteries.
FYI: In this case you're "probably" melting stainless, which is "probably" safe. Make sure you're not melting anything with chrome, zinc, or cadmium plating. Brain damage.
lastima como dañas las baterias, deberias donarmelas para mi scooter
Do not use these batteries in a hot engine bay. They will vent/catch fire and burn your car down. Speaking from experience. They were fine in winter, sort of forgot about the battery, come summer on a 40degree day in slow traffic I found out quick smart that they have their place, but not in a hot environment.
Ouch!! First I get charged $151 for shipping to the UK, now customs and excise are holding them until I pay another $92 import duty and tax haha. And they are STILL cheaper than i can get them locally (not that I can get them locally as they are always showing as "out of stock" on the store front) 💩😭
RIP that order then.. Package got returned to Amerman by Fedex.... I never received them. :'( Now have to try and claim all the fees back. FML.
Question.... I watch a lot of CZcams videos.... but I don’t know too much English.... i’m spending a lot of money on gas because Work an hour from my home top speed 60, 34 miles distance... what motor and battery recommends me?????? under budget..... please
Hi, for that you need to give your budget, and if you want to be precise, you need to know your coefficient of air penetration of your vehicle. And many other things, like, what extra range do you want ? How much weight you have to carry on, what is the system you choose, modifying with guears or directly to the weels power ? Classic hydrolic assistive direction or replacing by an electric one ?
Hector,
Go on www.evalbum.com, Many examples and configurations.
Thank youI forgot to mention, my bad, I want to do a motorcycle
Use the filter on ev album for motorcycles.There's lots of them. It gives you cost, range and equipment used.
I know I have to spend money on the project but what I mean is that I don’t want to spend $2800 on a controller
It is around 650-700 amps
I thought the cables would melt before the wrench.
When nails are not enough in the fuse box, use a Wrench
Can you put a cell in the wrong way to watch it go kaboom
Melt a 0.5mm thick 15 cm long copper wire with 3.7V
This is entertaining but capturing data is more important. Correct amp reading would be great
Maybe you want to donate a device that can test up to 2000A? I don’t own such device
Are these batteries good for electric car??
tin hriberski he has a video where he compared these to 18650’s and other cells. The 18650’s are The lightest, least expensive option. So while these are great cells, their price, weight, and form factor are not as good as 18650 3500’s. These are amazing for their massive amp capacity so they are popular for radio broadcasters and car stereo builds.
Hell yea, this is the type of content I come to CZcams for. I mean since I'm going to attempt dangerous shit like this anyway, it's better to have someone demonstrating a reasonably less-suicidal method as opposed to the information cawk-blok stifling that one is far more likely to encounter via the Internet Safety Nanny-Squad fulfilling their dull-ass calling in life of shouting down people's curiosity in every corner of the internet...