USPS boxes to show extent of flame & heat impact on surroundings?
Correct.
Hindsight shows that the front had more heat expulsion than the vents on the side.
Mario, what exactly was 'sploded in there if I may ask?
5000W
lmaoooooo
12 Samsung 50E cells, 24 Molicel M35A cells, 2 3S 3,000mAh LiPos, and a 1S 5,000mAh LiPo.
The cells and pouches were unwrapped to ensure that the heat source would have best contact with the cans for maximum effect.
It seems that this led to most of the assemblies exploding very quickly, with only a few stragglers afterwards.
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Heard that…
A car battery.
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Car battery capable of 800CCA is good. Then get a car battery float charger, keep it permanently plugged in
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Car battery.
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Don’t. By the time you have enough of those in parallel to get reasonable performance, you could probably buy two or three really nice car batteries instead.
The only reasons to go for li-ion for this rather than lead-acid are either A: you absolutely must have it be light and portable and damn the consequences, or B: you get a really, REALLY good deal on some large, high discharge lithium cells (SPIM08HP or similar).
tldr, just get a car battery.
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Also if you’re only doing it occasionally and own a car you can just borrow that battery. Free is always the best price.
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Any specs I should look for on a car battery besides 800cca?
As long as it’s 12-volt and can deliver enough power, then the rest is up to you. If you want a specific shape or brand for example, there are some variations. Other than that, they should all perform pretty much identically.
That’s the nice thing about car batteries, there are literally millions produced each year and standards in place to make sure they perform adequately.
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When I spoke with Frank from kWeld, he recommended that the battery be larger than 100Ah
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That’s an LLT smart bms. They are great.
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If you only intend to charge it between sessions, maybe. If it’s on a float charge, I’m not sure it matters.
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