12V 100AH LiFePO4 Short Circuit - Lithium Iron Phosphate

[@vladimus9749]

Valuable safety info and you're scratching the explosive itch so I don't have to do it myself lol. No one uses wires this thin with 12v so even thicker gauges would illustrate the massive fire hazards. Fuses and circuit breakers aren't just your friend, they're essential!

[@TheFosterJourney]

Thanks for digging into the batteries and BMS to showcase the safety features of your Rebel Batteries! I start my install tomorrow!

[@coalt]

I really enjoyed the "I do not have a stick long enough" comment.

[@SuperBartet]

If you are going to directly short out a LPF battery, you must do it in a wide open space because the gas's given off are very explosive, so a spark from the shorting of the battery will end up as a very big bang. Not to mention the gas's are very dangerous to breath in. Solid electrolyte interphase (SEI) film in the battery is the key reason for thermal runaway. In a LPF battery at 80℃ the SEI film inside the battery will start to decompose, SEI film decomposition will lead to direct contact between the anode and the electrolyte and cause a series of subsequent violent and irreversible side reactions. This results in the release of a large amount of heat and the thermal runaway of the battery. So hopefully all the gas's will blow away, and if there is nothing combustible by the battery, you may not have a fire. But don't be fooled into thinking the LFP battery is a safe battery, because it is not.

[@jackoneil3933]

Thanks I, it would have been interesting to watch the Amperage while you were doing the test.

[@olocausto80]

I like destructive testing, specially if I'm not buying the "lab equipment" . I have damaged 2 power supplies the smoke and sparks coming from them is scary. I can't imagine the effect of a misplaced bus bar or dropping a metal tool. Good demostration.

[@sciglassblower]

Good info. BMS's do not all survive short circuit even though they say they are short circuit protected. The cells will survive as you have shown.

[@howardescoffery4950]

Would have been nice to see the BMS short circuit test as well.

[@andrewzasidko6595]

BMS don't have a short circuit protection per se. What they have is overload protection. A short circuit in itself is just a very powerful overload.

[@AQUATICSLIVE]

That was fun. We did something similar during electrical training they had a rig with a pair of cutters cutting a live wire the whole head blew off. Was enough to show us to wear all the PPE when working in a buidlings electrical room. The hot metal sure does fly when you make a mistake and then fear makes the mistake worse.

[@OurBlackCatCottage]

Very cool video and I would love to see the 4/0 shorting of that battery. Although I do hate the thought of destroying a nice battery. LOL

[@donbarlow6697]

Yes destroy! Must see!

[@boringsoftware2093]

Wow! It seems it can melt ANYTHING? (thought the big wires would survive but no? not able to drain the battery with big wires?)

[@ChrisDIYerOklahoma]

Great job and video! Awesome. This is wire it is important to do installs safely.

[@ambersmith6517]

i like your safety lots of people copy you tube videos they would not know the safety stuff if you do not point it out good job

[@pelecho]

Yes try it with the 4/0 wire ⚡️

[@lukefarmer5391]

I would like to see a dead short with a cell that is supported or compressed and the same test with an unsupported cell or not compressed. Short the cell until voltage is at minimum safe voltage for both cells. Then recharge cells to see if compression has any effect. If the uncompressed cell bulges still charge and do a capacity test for both.

[@sukhpalsandhu6341]

is it safe to run your hand like that across the top of the batteries?

[@magi-jd2ug]

It would be REALLY interesting to try and measure how much Amp a 16s 15kWh batterypack throws under short circuit. Just to see if the AIC on the fuses people are using are up to spec, or if that would have burnt down their house.

[@TyrianHaze]

That's a sub right there. Love these practical experiments.

[@pohsinhee3076]

Great experiment looking forward for the battery short.

[@americanfreedom1777]

Hmm , good setup to test some of those AC. Breakers that "Everyone" says won't work with DC. POWER . I say they work fine.

[@niktak1114]

AC breakers definitely don't work fine with DC. They will arc if you flip them under load.

[@offgridnaija7922]

Weldon. I'll like to see you next video on shorting the batteries fully

[@michaelcostello6991]

This was a great safety video. Thank you

[@larrybell4599]

Great demonstration!

[@DavidLouthan]

Cool test! I see how deadly my 280ah cells can be ieie! 🤓 eye protection on now!

[@h8GW]

Did you essentially make a very unsafe spot welder?

[@quinn2084]

Nice. Good gutsy work. Yes, that 4/0 test would be great. Did you do that test already? Thanks!

[@mckenziekeith7434]

You are getting contact bounce and arcing. It might be more interesting to connect in a more firm way so that you don't get so much arcing.

[@PavolFilek]

Beautiful video. But try this with 15 - 30 kWh LFP in unventilated space. H2, C2H2, C2H4, C2H6, HF etc. are more dangerous, because LFP produces a lot of falmmable gases, and if you do not ventilate this gases from battery compartment quickly enough, after ignition, your house is gone. A lot of videos, when house from bricks was torne to pieces by LFP battery. BMS can not stop thermal runaway.

[@vladimus9749]

Do they emit these gases before the safety valve blows? Also, I thought LFP was not prone to thermal runaway?

[@peterm9893]

Been dying to see it. Thanks man .. and mega like

[@alanbyrne2297]

People who worked in telephone exchanges have observed the big version of this. 50V batteries that occupy a room with 4000Amp normal capacity. If you accidentally drop a spanner across the buss bars the spanner vaporises.

[@AintBigAintClever]

There's an old training video lurking on KZbin which shows what a telecom bank will do to shorted cables and reversed battery blocks.

[@howardescoffery4950]

Wow mam wow!!! Respect, my thoughts though is the batteries and how they hold up internally. Can you do a capacity test on them to see how much if any loss in capacity from that test?

[@carlh2007]

Yes please short the hell out of that pack. It would be interesting to see what happens to the cells, do they bloat up like baloons? Or just run flat and they survive?

[@rickard1802]

100ah lifepo4 can do that much? Im waiting for cells that I will build a 2900ah 12v battery from. 40x 290ah cells =)

[@bacolodtv4166]

wow.nice

[@dreamstyle408]

Hi, good vidéo, I want see same test with 48v lifepo4 battery plz :)

[@user-tj5nk7lb8l]

yoiu didnt measure the current? nor display the volt drop, a cheaap click demo

[@DCGULL01]

I WOULD like to see a small (20AH?) LiFePO4 battery short circuited. BUT, it would need to filmed with highspeed film at a crazy rate 4K? in a super controlled environment. Sorry, but safety is the 1st priority, if you aren't comfy- don't do it. Please.

[@LeopoldoManuelRamirezMena]

That's why vans catch fire sometimes 😮

[@AlbertsZiemelis]

Would be nice to see the current also not voltage drope only

[@fgk228]

Would have been good to have an amp meter. Good video anyway

[@Ojames600]

Nice Demo. I was looking at the White all in one unit on your wall, what model is that and do you like it ?

[@reBelBatteries]

24V 3000W. Purchased through Alibaba as a potential product to sell. Overall, okay, connectors are weak, but it has everything (all in one) and works. No mounting holes on the bottom. Happy overall.

[@Ojames600]

@@reBelBatteries Nice, Thank you

[@rickvaneijck3016]

I think the 8 awg was copper cladded aluminium.

[@SecondLifeDesigner]

Still waiting to see the video on short circuiting that Lithium Iron Phosphate to destroy the battery. Also, on another channel they claimed a Lithium Iron Phosphate fire does not produce its own oxygen when burning unlike other Li-ion battery chemistry so the Lithium Iron Phosphate batteries should be able to be put out with water. This other channel was able to get the Lithium Iron Phosphate battery to catch fire by piercing the battery twice with a long heavy metal spear. The first piercing the battery only glowed and produced smoke and steam. I believe the second piercing as the spear started to penetrate the housing forced air inside the housing to blow through the first hole raising the temperature of the glowing material high enough to ignite the electrolyte. If you could get the Lithium Iron Phosphate battery to short circuit and catch on fire then drop it into a bucket or barrel of water to see if it puts out the fire. That would be awesome.

[@samuellourenco1050]

It can produce its own oxygen, but it requires a much higher temperature to do so.

[@swsuwave]

What you need for this is a switch designed for HIGH CURRENT and REMOTE OPERATION like the blue sea systems ML-RBS which will do 1750A for 30 seconds. That way you could eliminate the loss in the arc voltage, wire it up, and concentrate on how the wire survives (or doesn’t). If anyone is interested in this type of test, reply here and I’ll get with our video dept to film it.

[@rocktech7144]

With a proper connection the 10-8 ga. Would have turned red hot and demonstrated a REAL FIRE HAZARD

[@hyrochinz]

I am from the third world. I have been wanting these prismatics for a long time, but they are really expensive. please giveaway, rather than destroy these perfect batteries.

[@jrherita]

Wow no BMS I guess?

[@waynevincent-le7jk]

dead shorting that battery would be impressive

[@markae0]

Some thousands of Joules of energy, until the wire turns into a kind of resistor.

[@USA-GreedyMenOfNoIntegrity]

How about 16S 280 aH dead short with 4/0... 😉 hehe

[@markae0]

Instead of 12 Volts X 100 farads (farad=the battery) = 7200 joules, others use 12000 volts X 0.0001 farads = 7200 joules to shrink coins."Coin Shrinking Using Electromagnetism" Little Shop of Electrons

[@LTVoyager]

Interesting experiments, but this isn’t electronics.

[@cenchloraadums3143]

After all he realized his setup couldn't apply enough pressure on the wires for a big enough current flow..

[@Pgr-pt5ep]

No sure what you're really testing here with such poor contact quality and test methodology. Too many unpredictable variables to get any scientific conclusion from this test.

[@MrSeebobski]

4/ 00 for the total death of the battery!

[@eksine]

I think this is a bad setup, you have a very poor connection, the servos should be flipping a circuit breaker, not physically pressing the wires to the bus bar. I don't think this was scientific at all, especially since you literally used a stick

[@reBelBatteries]

Thanks for the comment, the point was to 1) shows that wires spark, wear eye protection when working around live cells 2) LiFePO4 cells are safer than people think.

[@eksine]

@@reBelBatteries oh yeah lifepo4 is pretty safe, it doesn't explode, except it can arc over a blown fuse at 13,000 amps if the user uses the wrong type of fuse such as anl, mega, or maxi/ Ani. Most people don't realize class T is the only type ever recommended for LiFePo4. I do use the midnite solar DC circuit breakers but they are rated at 10,000 AIC, you're not supposed to use it but I'm taking the risk , anl and mega fuses are only around 2,000 AIC which is dangerously too low, class T is 20,000

[@mikeoreilly5065]

I think the video was fine for the intended purpose. Regarding the use of Class T fuses, I agree whole heartedly. I think another setup could explore/measure the internal battery resistance, calculate the available short circuit current and then test to see how much flows in a dead short. I also note that the Class T fuses have a peak let through current which can be used to protect downstream devices with a lower short circuit rating. Additionally, feeder wires add resistance as you move out from the battery and this feature can be used to calculate the reduced fault current available at some distance from the battery. Using this data allows for a proper design based on detailed fault calculations. Both the available current and the magnetic forces are at play in the ratings of fuses/breakers. Great discussion on this topic and worth it if we can get people to pay attention to the required fuse ratings.

[@LawAbidingCitizen117]

@@eksine at 12V, the ANL fuse is safe to use. 12V is not enough of a potential difference to sustain an arc long enough or far enough to cause problems for an ANL fuse. I'm not sure if the voltage is 24V or higher.

[@eksine]

@@LawAbidingCitizen117 ANL like all fuses are rated by AIC ampere interrupt current, look it up and educate yourself, also I was talking about the unstable connection using a physical guillotine lever instead of a quicker switch,

[@kristiqntachev7139]

That is a really stupid test and a lot of wasted time :)