Testing 30 Gauge Fuse Wire for my Lithium Ion 18650 Powerwall

Can you feel a temp rise in the fuse wire when just running through a single or a pair of cells ?
 
Ah damn you beat me to it lol. I was going to do a similar test. Great job!!! Agreed on the wire for a short circuit fuse because all the cells will vaporize it like it did. If thats all someone wanted was a short circuit fuse they could even use thicker wire. I am still going for a lower amp fuse so if a cell starts to crap out it will pop before it brings down the hole pack or stress it. Good video
 
If u dont know what wire it is you could meassure the voltage drop over it on max amp ur using. Could be good to know now
 
Your wire will take 23 amps all day with a 7mm gap with this ghetto rig setup. Im sorry, I come up with some funny things at 2:50 am. Need sleep
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mike said:
After conducting these tests, I am very confident in continuing to use my 30AWG wire moving forward. Please share your thoughts and also if anyone can explain why the fuse did not blow with the meter. Was the meter/meter leads really adding that much resistance?
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For that meter, it has a burden voltage of 37mV/A, so its 37 milliohms from the meter, also its rated at 20A for 30 seconds, and 32A for 6seconds, seems the datasheet was pretty close seeing as its meant to have a 20 minute cooling period between surges,

the leads you can easily measure, but from the current, i would hazard a guess at about 50 milliohm per lead, and a system total somewhere close to 135 milliohm

compare that to your test lead which is probably on the order of 35 milliohms,
 
Mike,

It wasn't me who thumbs down the video, but it did leave me scratching my head on your methods to get the fuse wire to trip. It started off great using the multi-meter to show what was happening and what didn't happen. But then when the multi-meter blew, you just shorted them out without any type of "readings" what so ever to prove what is happening to the viewer. When Joe couldn't get some of the wire he tested to blow he announce that he was going to short it, but even some of the test wire didn't blow on a short, and the amp meter was in full view of the camera. So, I suspect that people who gave you the thumbs down might be thinking the same thing without providing an explanation. Just my thoughts.
 
mike said:
Wow, I got 2 thumbs down on that video!? Is there something in my tests I missed? Or was that just Kevin?

Edit: Now 3? It would be nice if someone would tell me what I did wrong rather than just thumbing it down...
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Thats the nature of the beast, someones opinion. What I noticed is that your test ended up like everyone elses, just shorting the cells out and never finding out what amp rating your wire is.
 
Hi,

at this point i just wanted to step in with a common question about the fuses :

With all the discussions i read, i am still not sure which fuse wire (better : which max Amps) is the best to go for a single cell. 4, 5, 6, 7 Amps?

Thanks for any hints and best,
Chris
 
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