The battery builders club

I will upload some pics
Done around 7 local batteries now
Will find some nice pics and upload

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Builders discretion… I have some I’m not proud of…

Just a few things. Use fishpaper every time a balance cable crosses another one. You did this a few times, but it’s missing on some. Same with charge cable, of course. Also, some balance leads are directly on top of the nickel or even solder joint of another cell. That’s not good. I can’t see any tape that holds the p-groups together? Are you just going to heat shrink it all at the end? There should be some sort of tape, that holds the groups together, so that the stress isn’t on the wires. I can’t tell, if the solder joints are flown on the nickel nicely or just sit on top. I’d probably add some solder and reflow some of them. Other than that, I can just recommend fixing the cables and tidying everything up a bit more. Then It’ll be a good pack (:

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It’s not unsuitable, it’s just amateurish. I wouldn’t feel comfortable taking money for it unless it’s closer in polish to Sky, Duck, and the other pros.

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Well but polish is just that, polish. Still looks like a rock solid pack. If I’d to pay extra for polish, I wouldn’t. :smiley:

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This is the stuff that I should’ve prevented originally, and I can go back and add small pieces of fishpaper before I heatshrink it.

the underside is covered with 3 layers of FG tape. I can hold it from the middle and it stays together and flexes a little.

The solder joints are sticking to the nickel nicely, they’re just ugly. I tried reflowing some of them but something with my technique is off and it doesn’t come out too great.

why did it take so long to ask this question, who tf used a blowtorch to strip wire

WTF how is this a failure mode?? When my probes stick, nothing happens until I take them off and weld again.

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Or maybe something else :man_shrugging:

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You’re misunderstanding. The welder stuck, the probes were stuck to the nickel dumping current as a result. Not the normal sticky probes you wiggle free after a weld.

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oh, the welder failed completely. I thought this was normal behavior for your welder whenever it sticks. Scary as fuck…

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sounds like it would be a control glitch he said he was using it wrong whatever that means. Do not use it wrong I suppose.

Anyone have links for good quality in-line mini blade fuse holders? I’m looking for something that’s at least 15A rated (16AWG wires) and preferably with silicone wires.

I’m pretty sure I have seen links like this on here in the past, but I cant find them now :persevere:

Any help would be appreciated!

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I have never seen those things with silicon wire. But there are dozens of the cheaper kind on ebay, although thats probably not the kind you’re looking for.

Second one looks identical to what I use which is not silicone wire. (First link appears to be broken)

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To be honest I think they were both plastic insulated after reading some reviews. Grrrr.

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I haven’t been able to find anything silicone insulated. Most of those are being used in cars and such where they don’t care

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I do this

then fold the blades over in opposite directions, heat shrink, and done.

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For my custom batteries, I use a 15A axial fuse soldered in line with the charge port, which is extremely low profile (see the fused charge ports on my site if you want pics of this method).

I need these fuse holders for production batteries where user serviceability is a must.

Sounds like I’m going to have to go with a PVC coated cable fuse holder :confused: oh well! Thanks for helping out y’all :metal:

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slide silicone tubing over the PVC wires. I was thinking you could 3d print a fuse holder because they are just blade connectors in plastic.

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12s5p P42A build in progress!




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