How do you figure out what size heatshrink you need?
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Short answer is you don’t…I just have a lot of heat shrink
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Hahaha! That’s what I do…and hope one of the sizes fits 
300mm 250mm and 200mm is what I generally stock, everything else gets a nice wrapping of kapton tape
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Long answer is you gotta add it up, say for a parallel group, it’s diameter * (pi/2 + n - 1) for the flat width…I try to aim for the actual size * 1.2 (usually you get a 40% shrink)
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@ZachTetra it’s for my LiPo packs. I’m gonna open them up to see what I’m working with. But there is no way in hell I’m doing so without heatshrink ready.
Haha that’s an easy one, you just want something with a flat width between 110mm and 160mm (for the fat one)
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Easy… yeah…
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Note to self: cancel 100mm heatshrink
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Oof, ya gotta account for tolerances my guy…if you’re feeling ballsy you can get 105mm
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I saw 100mm as being 4inches and thought it might be too big
Imma let you in on a trick… Get some thin string (I use a roll of dental floss), wrap it around the item you are wrapping, mark the point of intersection, measure the length, divide by 2, multiply by 1.2… That’s your perfect flat width
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I need help…plz. ugh
So I think I shorted my Daly BMS. Just got everything all finished, charge port and loop key and everything and went to plug in the BMS at the very end and got a spark near the end leads. I’m not readying any voltage through the XT connectors either. This is a 13s DALY BMS and I followed this diagram to wire it for 12s:
When checking the voltages through the balance plug, the voltages all check out for each group as they should, and the last two groups through the plug both read the pack voltage, which is 41.32V. Which makes sense because both my last 2 balance leads are soldered to the - of the last pack. Here’s my mess of a battery
Edit: sorry the photos don’t match the paragraphs well I’m using my phone here blahhh
Based on the wiring I should still get voltage of the pack through the XT connectors with the BMS unplugged if the connections are all good right?
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I didn’t read all, sorry, but why do you measure „minus“ voltage? Maybe that’s your problem already?
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I dont think the 13th lead should be on. If you’re wiring for 12S just wire for 12S.
Also, buy some black wire before you make a big polarity mistake
lol I just had the pos and neg probes switched around on the FLUKE. Thanks but that’s not gonna hurt anything
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according to this and the diagram I think I solder the extra lead (13th) together with the 12th pack’s lead no?
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what are you guys referring to here? I think all the wire colors are coordinated coorectly with polarity I was just reading the voltage with the probes swapped around
oh wait you guys are right, something is wonky here!
you wired it backwards?
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