Vertical would be totally fine as long as you have at least an inch between the solder points
You forgot a weld 
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@b264 I found this page listing conductor currents for flat copper braid, might want to add that to the conductor currents list:
https://www.copperbraid.co.uk/current-ratings/
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Am I blind I canât see it 
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Mm questionnable I kind of used 18650 fishpaper rings on my model 3 2170 batteriesâŠ
itâs not the smartest but better than nothing 
First battery I ever built/owned and it. was. SCARY. but I ainât no poussy so I just did it anyways.
itâs a 10s6p with 2170 model 3 batteries and a 10s 60A smart BMS
I may or may not need help to parameter the bms correctly
overvoltage
overvoltage release
undervoltage
undervoltage release
ETCâŠ
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Those numbers look fine where theyâre at.
Yeah, battery building really brings home just how power-dense these things are. Crazy amounts of power on tap here, just waiting for an opportunity to ruin a day. Best to treat them with much respect.
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Yep thatâs what I did, took me some time to get to a finished product with all the precautions and respect to make it even if my mom kept telling me to be careful while spotwelding (did 1s6p for all 10 and spotwelded all of them together in the end) wish I had bought a better spotwelder tho
A little weak to be honest
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How can I make them better?
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Bump up the power settings on your welder. Make sure you are using decent pressure.
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Iâve got it maxed out but I can try using more pressure
I had seen that thing and wondered if it could even handle 0.1mm nickel. How did it fare? Did you do a peel test to make sure it was actually making decent welds? Got pics?
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If thatâs full blast, you probably need a better welder. Or if itâs one of the battery-powered ones like a Kweld, you need a beefier battery.
Not sure if it will work but you can try to double pulse the welder while holding pressure, first weld gets it to temp and the second weld makes it strong?
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it was okay actually it even came with 5m of .1 mm pure nickel and it was as good (from the pics iâve seen from better ones) but donât go thicker, the welds wont be as good. the only thing i donât like about it is the charging/discharging time
Donât judge, those were my official first welds on an old powerbank I had to take apart.
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Fishtaped each p pack, wrapped each one in kapton tape (I think probably unnecessary), and niped the sharp edges. Now I just need to make the tabs for the series connection which Iâll also wrap up and insulate 
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Thoughts on bullet connectors on each series connection?