Btw guys, do you think this x 2 as a series connection is good for an occasional 10 sec of 100 amps?
4mm2 is roughly equivalent to 11 AWG.
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I keep meaning to grab one of those but the shipping on the big enclosure + bulk supply keeps costing as much as the bare unit. Do you use the 60/72V ones they sell alongside the regulator or what?
I got the 60v PSU that comes as part of the ‘bundle’, from Banggood. It wasn’t too much money I don’t think. But it was a while ago so I’m not sure…
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Took it apart n doubled up on some 0.15x8mm, any critiques,pointers or tips? plan is to weld some tabs onto it for series connectos
Thanks, then it will be more than enough.
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Do not weld to the middle of the negative terminal. Also the welds look a tad cold. Have you made a pull test already?
I agree with @Linesflag, avoid the middle 3mm of the negative end. That’s where the internal spot weld is done.
This is the inside of my fume extractor tube after 3ish months of use. I believe most of that stuff is from flux fumes. Make sure you guys are well ventilated while soldering.
I’ll post pics of the filters soon
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Dang… That’s pretty bad. Maybe I need to make myself one
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It’s so weird how it’s stringy… imagine that stuff in your lungs. 
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I mean it’s basically the same as smoking
I am always careful to not breathe the fumes as much as I can but I’m sure some still get in there
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I wear an n95 and a have a fan slightly pointing to me. Some moments the fumes swept towards me though and I smelled it. I don’t feel good about that. Am I worrying too much?
Why point the fan towards you lol
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Any fumes that are coming at me gets pushed away. It’s perpendicular to my desk, it’s not bringing the fumes to me.
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It’s not ideal to inhale any of it but it’s somewhat unavoidable. The moment I smell it I move away to fresher air. I also hold my breath when I know there will be lots of fumes. Glad to hear ur running a fan as well.
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Same
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My mini extractor is all white and nasty after about 5 batteries, I’ve been wearing a mask and it’s definitely helping to have both
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Looks correct to me, running bypass it looks like.
As long as all of your cells are oriented properly it should work
Obviously assuming your BMS #1 is negative batt 1