Originally planned for the cells to sit in a square pack so I bought a roll of “H” style nickle. Changed my mind and adapted.
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Almost all the slotted nickel I see is slotted for cells held by plastic spacers, not really any nickel out there that is slotted for cells all next to each other, past 4 cells the spacing gets really off.
Very much. Dont use a lighter lol. Cold joint heaven.
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The slots aren’t even a concern. It was more of how the cells were laid out. If I had originally planned the cells to sit staggered, I had bought staggered nickle roll.
Anyone got a few hundred 21700 fish paper ends or a source so I can get some asap?
Otherwise I’ll look for someone who can cut them with regular fish paper??
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Forgot to go to the source for batteries. Thanks.
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Does anyone have 30 of the 21xxx cell rings they would mail me? $0.30 for a stamp is more appealing than $4 for a package 
You really like to make things complicated dont you?
Looks very tidy tho
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I am new to spot welding and nickel strips and have not idea how to calculate how many strips is enough for a 9s6p 50amp battery. Pls refer to picture. I need some advice. I have 3 layers of .12 x8mm top and bottom and 1 layer in X
. Is that enough? One 0.12x 8mm of nickel strips could Carrey 5 to 7 amps right ?
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You have enough nickel, next time for simplicity just use 25x0.15mm strip
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What is the general consensus on reusing old cells in a “new” pack? Specifically I would tear down an old TB battery and transfer the parallel and series groups directly to NESE modules barring any need to replace any with new sticks. Maybe sourcing a new BMS or charging and balancing externally, or even reusing the bms it has as that’s fine too afaik.
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You can reuse old cells in new pack, no problem with that. But you can not replace only one or two old cells, each group should be made out of same number of old and new cells. If you gonna use one new cell, each group should have one new cell in it. Old cells have different characteristics than new.
If old bms works, I don’t see need for new one.
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Thanks, I’ll make sure I don’t have to replace any then 
I have not opened up the pack and looked yet but the biggest difficulty I can foresee is pulling existing the nickel off. Because this a cheap mass produced pack I don’t imagine it will have tons of good welds I can’t pull apart or cause too much annoyance deconstructing… hopefully… I have not seen any of these batts pulled apart.
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Try to use some flat shears like Plato 170 to remove those welds. If there is still some nickel left, use dremel and grind it down a little bit.
Usually it is easy to weld new nickel over bumps of old nickel, but since you are using NESE, probably better to make those old welds flat 
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If I need to I can grind away old nickel I can’t get off but I would very much like to avoid that where possible. I’ll look into those shears.
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They are popular shears and you can remove those welds almost completely only with them. Should be easy with a little bit of patience
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Need some thick nickel
Where do you all buy yours?
I’m usually AliExpress, but need this week by Thursday.
10mm? .20 or thicker?
Most 0.2 comes from aliexpress. Doubt you’re going to find any before Thursday, even amazon is struggling to deliver anything sooner than Friday from today. You need a lot?
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