The battery builders club

instead of pulling straight off try peeling/rolling it off with some pliers, works pretty well in my experience compared to just ripping it straight off

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will give it a go and see

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Remember that you can always try on some practice cells first before you make things any worse on the actual battery :slight_smile:

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Results

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yeah sorry thats what i meant

im not touching the pack till i can guarentee i can do it right on some practice cells

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possibly different weld powers? mine on every weld a piece of nickle would be stuck to it.

Its gonna end up like that tbf with you. You should be fine though.

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cheers man

will give it a go and see (on practice cells)

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Don’t you think he can just add another piece of nickel on top?

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I have no idea. :slightly_smiling_face: It depends on how the particular pack was built. You can measure the voltage drops between different points easily though if you can put a load on the pack.

Otherwise, figure out the max current flowing through the strip before the current reaches the first wire. Then determine if that amount of current can be handled by the strip without too much heating or voltage drop. This is subjective, set your own limits or ask around for a general consensus.

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75 amps through 2 layers of 15mm wide 0.2 nickel. i will check the ratings and see

edit: seems as if 75amps is towards the top end of how high that should be, but its ok to work with and shouldnt overheat. will do more research

edit2: seems like 75amps is workable but very high. gonna possibly add another wire connection (not directly on the cells) to lower the amp load

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Would it be logistically impossible to scrap the build and start over? I’ve done that in the early days.

It set me back a few bucks, but it was worth not having it be a cloud over my head. I consider scrapped batteries the cost of tuition, in a sense.

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i just tried on some practice cells with a new method (curling the nickel) and its possible even if a pita

gonna give it a go

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You absolutely can, but the finish won’t be as clean.

With the series wires already over the edge of the battery, it’s not really worth saving in my opinion compared to how great a result the can get otherwise.

I just think it’s too dangerous to redo. I regularly deform the negative ends of the cans when I tear nickel off, but it’s the positive terminals that scare me the most. It’s hard to tear nickel off without using the side of the can to pivot off of, which, when you’re tearing the positive ends off, is the negative part of the can. I just worry he’ll short his pack somehow. That would be heartbreaking.

I would just add another 1 or 2 strips on top since it’s not a flexible battery pack. Shouldn’t have to worry about it coming off.

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so luckily its just the negative i have to do

half way there now.
im going to cut the soldered wire and then lengthen if necessary

the negative end got deformed slightly is that a major issue?

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Well, I’ve used cells like this, and I haven’t noticed degradation.

Glad it’s just that side.

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Please cover up all the areas you arent working on!!!

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will do

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You have to worry about particles now, even dust can cause a short. Make sure it doesn’t fall down to the positive side of the battery.

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