Hmm I guess those onewheels dont use that much amprage?
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Just look up corner chomper 
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Itās only supposed to be a 750W hub motor, canāt imagine it drawing more than 20A continuous
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your solder on the pcb looks great. the real trick to soldering the tabs well is to pre tin the tabs. basically you want to evenly coat the bottom on the end of the tab that you want to solder to the pcb. This way you can ensure a good solder contact when you attach them together, without the need to go all the way over the top of the joint.
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Ahn you are back?
Is that your copycat?
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Fuses depend on the cells and pgroup size.
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Wat is this tool?
Thatās right, but I mean, maybe you know a shop where you can order different fuse wires sizes in small quantities.
As i understood itās a problem to find them without to buy 1kg spools
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Nah. Any bare tinned copper wire will do.
Remington industries bus wire
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Yeah think so
Look at that!
Dude they are awesome. Seriously at least 4 times faster than scissors 
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Nice! What size for fusing a 30q?
I assume the process is to solder the wire to a small tab then weld the tab to the battery?
Thanks!
Also thank you @ducktaperules for the feedback.
I think these cells use an aluminum top cover. So itās really hard to weld nickel to it because of the lower resistance. I had my welder at max and the welds were still pretty weak.
These are really good cells if your looking for low current application and good cycle life though.
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I did this in the past welding the fuse wire directly to the cell - REALLY fiddly but works surprisingly well
These were how mine came out 
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There is no on-size-fits-all answer for determining cell-level fuses.
This calculator is a good starting place.
Let me walk you through the sheet
This is my 12S5P setup, running 30Qās
Define your pack in B1:B6
- The rated discharge for 30Q is 15A (B1)
- The peak discharge for 30Q is accepted to be 20A (B2)
- My P-groups are 5 cells (B3)
- The copper wire Iām using for fusing is 24AWG (B4)
- Iām willing to allow a single cell to fail in this scenario (B5)
- Iām going to allow the ESCāc to pull a combined 100A from this pack (B6)
Cells B9 through B12 describe the characteristics of the pack defined in B1:B6. This should be self-explanatory.
Cell B14 is the ability of the fuse to handle normal discharge currents. In this example the fusing current of the 24AWG wire is 29.2A. This 1.95 times more current than the typical 15A discharge of the cells.
Cell B15 is the ability of the fuse to handle peak discharge current. In this example the fusing current of the 24AWG wire is 29.2A. This 1.46 times more current than the peak 20A discharge of the cells.
Cell B17 is the maximum current the ESC will pull though each fuse.
Cell B18 is the rating of the maximum current drawn vs the fusing current. In this example the ESC is pulling 20A through each fuse, which is 68% of the fusesā capacity (29.2A)
Cell B23 is the factor of safety. The higher the number the better. The definition here is Pack Inrush Current (B11)/Fusing Current (B12). Basically, how much current is in reserve to operate the fuse(s) of the bad cell(s) as a fraction of the fusing current of the fuses. In this example, I have 60A of Pack Inrush Current (15A*4), so 60A/29.2A = 2.05. Translation = I have twice the amount of current I need to operate the defined fuses in B5.
Hopefully this helps!
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Hey, yesss, Iām back again, but Iām not building any batteries for costumers anymore.
I hope you arenāt still angry about me, but I think you saw my massage on Instagram, where I said sorry to you!? ( I donāt remember yet, if you saw it or not)
A few friends of mine started selling nickel strips and I thought It would be a good idea to do it with them.
But Iām not sure, if I should sell anything here, since I did many wrong things here 
I understand if youāre not going to trust me anyways again, bro
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