General > General Technical Chat
Health and Safety - Battery Banks - Lithium et al
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Squarewave:
You should start a protest then, you obviously feel very strongly about what other people choose to get up to.
robint:
And why not start here - board promotes itself as a fund of knowledge on electrical matters

Big Yawn so far - but not trivial by those who  have experienced the hazards of dc over-current faults - notably the yachties :-/O
tom66:
No small 18650 pack is outputting 20kA so your fears of arc flash etc are overstated.  The biggest risk with 18650s and the like is thermal runaway due to short circuits.

Even a Tesla Model S 85kWh battery fully charged has a short circuit capacity of only around 5kA.  If you're fucking around with that though I'm sure the 400V will get you before the arc flash does.  A direct short across the pack will blow the main fuse and probably even some cell level fuses, so the party ends pretty quick.  Bypass the main fuse for thermal runaway. (Do not do this!!)
SiliconWizard:

--- Quote from: robint on November 07, 2023, 04:48:51 pm ---Yeah guys its easy to take the far out, laid back, outa sight position, BUT what enflames me is that YT openly allows vids created by amateurs making lithium battery banks on a kitchen table, no warnings, unsafe handling and design practices.  YT prohibit vids on making explosive devices.  It suggest age restricted categories

--- End quote ---

If your concern is YT censoring some content while letting some very other dubious content flourish, well certainly.
Usually the rationale is easy to understand once your follow the money.
nctnico:

--- Quote from: tom66 on November 07, 2023, 05:18:21 pm ---No small 18650 pack is outputting 20kA so your fears of arc flash etc are overstated.  The biggest risk with 18650s and the like is thermal runaway due to short circuits.

--- End quote ---
Fears of arc flash are NOT overstated. I've seen this happen on light mobility battery packs (like the ones found in small motor cycles) causing the pack to catch fire. Even with all the safeties in place and properly rated fuses. I'll admit this was in a special condition outside normal operating parameters but still... In the end a battery is a device which can release it's contained energy in a violent way.
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