Haha that’s a little bit different than the scenario suggested above. I have always been a fan of the way Ernesto did those batteries.
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Yep. Works exactly the same.
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Bms is bypassed
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I made a little oopsie while spot welding – my hand slipped and the two probes touched 
. Should I be worried? This was on the positive side so the can shouldn’t be punctured.
** Looking at it more seems like the welds are too hot too
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You’re probably fine. If you are overly worried you could rip the strip off and replace it
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ChiBattery wouldn’t be worried.
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I take it maybe I should be then? 
ive seen people use both hoy glue and some kind of silicone to adhere p groups together, which is preferable?
I generally use hot glue to join individual cells together, and silicone to join groups together.
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so youre saying you hot glue cells into rows and then connect the rows with the silicone? what silicone do you recommend?
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Probably not that random home repair product you’ve had forever.
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You can get fancy electronics silicone, i just use roof and gutter silicone.
Whatever you use, it needs to be neutral cure.
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Should have a silicone sourcing/application general thread.
Glue and molding two for one
maximum confusion.
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On this note, a thread about tape would actually be super useful and informative
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I’d def consider it lol. Also, check the fuse on your welder. When I shorted my probes and got an overcurrent error I also fried my fuse. This was a Kweld. Not sure what you’re using…
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Hey replying because idk how to post. I am building a 12s4p battery at the mo but I’ve had two Bms smoke and break on me. I’m looking for a suitable Bms for 12s4p with a 44.4v rating and 10.4amps. can anyone recommend a Bms?
The Daly BMS is the current favorite in the esk8 community for hardware BMSs. (Will be back in stock soon, or it’s also available elsewhere)
However, if you keep blowing up BMSs then there’s a chance it’s an issue with your battery, not the BMS. If that’s true and you dont fix the issue, then you will keep blowing up BMSs.
What are the circumstances around your BMS failures? Do they blow up as soon as you plug in the balance leads? When you try to charge with them? Something else? What BMSs were these?
As always with questions like these, clear/detailed/high resolution pictures of your whole system help a ton with giving recommendations and advice.
As a brand new account, you are not allowed to create a new thread until you reach a higher level. You get there by reading posts and interacting with things. Stick around and you’ll get there in no time! Type “discourse trust levels” into your search engine of choice for more info.
Welcome to the community!
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Yeah, Im just going to move on to a new p group since I have a bunch of extra cells, and if I need it, come back and fix this one. I’m using a malectrics, and it doesn’t seem like any fuse was popped so I think I’m okay on that front too
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Wait, I’m confused. Is 12s normally called 44.4 V “nominal”? Both your site and the guy who posted above you call it that, but I would have thought it was 43.2 V since most cells are 3.6 V nominal. I know nominal is mostly a kind of unimportant thing anyway, but why would it be 3.6 V per cell for 10s, 3.7 V per cell for 12s, and if your site is anything to go by 3.75 V per cell for 16s, and 3.722 V per cell for 18s, based on the numbers on your site?
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