The battery builders club

No worries bruh.

I personally like to throw a cutoff wheel on my Dremel and hold a shallow angle to the cell ends, use the outside edge of the wheel and grind away.

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I thought of that, but I didnt want to cut through the cell housing. How thick is the cell housing anyways?

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@Battery_Mooch :point_up_2::point_up_2::point_up_2::point_up_2:

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I couldnt say but it’s something I’m weary of. When I say shallow angle, I’m talking 15°-0°. Its a fine line but it works for me lol.

Kids don’t try this @ home

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Cutoff wheel is excessive and imo not the right tool. Flush cutters and a circular grinder on a rotary tool. Be thorough with the former and sparing w the latter.

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You gotta be super careful with the cutoff wheel, but it definitely makes short work of it.

I also use the stone ones

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Thin.

Be very careful and go very slowly. If you hear a hiss or “sizzle” sound of gas escaping, you went too far and that cell is now trash. If you smell a sharp chemical smell, same thing.

It’s better to remove too little material and have a slightly harder time welding the new nickel strips, than to remove too much nickel and ruin a cell.

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That sounds like a reasonable assumption, yes

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Thx, slow and careful it is.

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Will a 60A BMS be okay with my flipsky 6354s? They are rated for 65 but the website suggests a 50A BMS

Use the bms for charging only, and bypass it for discharge. The VESC will handle the low voltage cutoff.

A 20A BMS should be fine then.

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Is 20A a requirement or can it be lower i.e. 15A?

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That number generally refers to discharge, but it’s linked to max charge rate. You can go lower, just make sure your charge rate is below the maximum.

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The output amperage doesn’t really matter if you’re wiring for bypass. Just be cognizant of the charging current the bms is rated for.

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I’ve found my carbide burrs work well too

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I use a small flap wheel. It’s just the right amount of being aggressive to be quick, but not dangerous.


Any thoughts on using 3m vhb as pgroup isolation?

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sounds expensive

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That shit is crazy good adhesive, no idea how well it would stand up to abrasion but because it sticks so well i doubt it would have the chance to abrade. I don’t really see an issue with it

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Yeah I agree - I doubt the cells could move at all

But it’s so expensive

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