Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Safely housing the battery bank
#11
CO² does only have a very limited cooling effect. It would not keep other cells from heating up.
Reply
#12
(05-14-2019, 03:17 PM)5buBZMKeJZgapTGsbGzKf Wrote: CO² does only have a very limited cooling effect. It would not keep other cells from heating up.

Not the cooling effect (not that limited) but more the replacing of oxygen in the cabinet is what i am looking for...
i know a lithium fire needs no oxygen (has his own) but it might put out the burning plastic holders and stuff faster ... right?
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
Reply
#13
If you can get it, halon gas.
That will replace oxygen very quick.
Easier to get: nitrogen.
But you will need to air tighten your cabinet.
(I am planning a experiment in a vacuum chamber, let see what happens)

The problem would be to apply it, maybe a motor on high rpm with a coil or something to pull the pin out that is attached to a wire?
Before a c02 extinguisher is empty it will blow his load in a minute, (6 kilo).

A Co2 cylinder must be shaken every year by holding it upside down again and again, to let the components stay mixed together, if not done every year the components will settle.
Still learning English. Learning Li ion and solar technology.
+/- 3500 Li ion cells harvested, none checked and counting.

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
Reply
#14
That's not the problem.

To put out a lithium-ion fire, you need either sand or just regular water.

Why? Temperature control.

Since lithium ion compounds can combust, and provide their own goddamn oxygen, you need to remove heat from the reaction.

Reducing heat as much as possible is critical to prevent chemical reaction acceleration.

So, water or a sand trap to reduce heat should be used.

This is always why I have a small jar filled with water besides me when I teardown lithium ion packs, and during the summer, some sand. Smile

I've had one time when a nickel strip failed on me, and caught fire right before I cut them. Had to throw the cell in a buck of water, then sand.

Some powertool manufacturersuse strips so large that even a small twist will cause a short, and since nickel has high resistance, bad things can happen.
The power of lithium ion is in our hands!
We'll show them what we're made of!
Reply
#15
(05-15-2019, 06:29 AM)100kwh-hunter Wrote: If you can get it, halon gas.
That will replace oxygen very quick.

Why are you suggesting the use of a banned substance on a DIY forum ?
Reply
#16
(Yesterday, 09:17 AM)Sean Wrote:
(05-15-2019, 06:29 AM)100kwh-hunter Wrote: If you can get it, halon gas.
That will replace oxygen very quick.

Why are you suggesting the use of a banned substance on a DIY forum ?


While the production of Halon ceased on January 1, 1994, under the Clean Air Act, it is still legal to purchase and use recycled Halon and Halon fire extinguishers. In fact, the FAA continues to recommend Halon fire extinguishers for aircraft.

That being said Halon would not work anyway as it is a gas that replaces the O2 in the surrounding enclosure. It does not restrict the production of O2 which is what Li-ion batteries do. It is a fire than can only be smothered using a non conductive dry chemical.
Lithium-ion batteries are considered a Class B fire, so a standard ABC or BC dry chemical fire extinguisher should be used. Class B is the classification given to flammable liquids. Lithium-ion batteries contain liquid electrolytes that provide a conductive pathway, so the batteries receive a B fire classification.

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



Reply
#17
There's only a very very limited number of legal uses of Halon these days, including crew compartments in aircraft, along with some space and military applivations - suggesting its use for our purposes is somewhat erroneous.
Reply
#18
(Yesterday, 01:01 PM)Sean Wrote: ....... - suggesting its use for our purposes is somewhat erroneous.

I totally agree Sean. As I said it would not work on a Li fire anyway.
But when it was legal it was pretty nice to have in the auto shop when a carburetor caught fire.
Poof out goes the fire and limited damage. But we don't have carburetors anymore so......



Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 5/19/2019
Total Number of Cells                          5263
Cells  >80% of Capacity                      3703
Cells <80% of Capacity                       1535
Cells ≥2200mAh & ≥ 80% & ≤75mΩ    2563
For Info Google Drive
Not your average Wolf       
            Cool



Reply


Who read this thread?
90 User(s) read this thread:
daromer, Sean, mike, Korishan, PAF, Franky Beuselinck, Mike C, jdeadman, wim, rebelrider.mike, watts-on, Hanssing, Stefaan De Ridder, BlueSwordM, Mazlem, Geek, Jon, Swake, ChrisD5710, Oz18650, bigblue, Ste Collister, Charly144, djuro, spinningmagnets, drchips, Chablis_m, Headrc, rodagaster, Crimp Daddy, jonyjoe505, Redpacket, Ibiza, Zvonko000, davidtrn24, Oliman, farmerjohn, Bubba, Cherry67, Sholphin02, Walde, Riplash, 100fuegos, edd021, Jim Jr., Katarn_89, ungp, w0067814, HikingGuy42, Gregor Scott, Buzz0515, chuckp, emuland-metroman, hazSolar, Truth, jaeger-audiodesign, Shawndoe, Wolf, 5buBZMKeJZgapTGsbGzKf, camthecam, Dallski, rettore, Solardad, stevelectric, richie241, RikH, mart1nn, OffGridInTheCity, jferrerd, chamele0n, Tobeabrepper, Richard, bertvaneyken, Overmind, ma3006he, rhedbatt, 100kwh-hunter, Lexi, juanjo57, schmo, gigaz, ben teker, henrykurt, Milanbeh, BitcoinBandit, lange5766, A713083, michelbuyckx, Regalo, messytyagi

Forum Jump:


Users browsing this thread: 1 Guest(s)