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    How to handle series connection in a moderately large 18650 battery build?

    I did - I found this post on the forum here with a chart compiled by forum user Matador. I went with 0.2mm pure nickel strip, and the "thinnest" parts of the nickel strip are about 7 or 8mm. So, according to his chart, my 0.2mm thick nickel strip is good for up to 5.7 - 6.4A (depending on how I...
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    How to handle series connection in a moderately large 18650 battery build?

    Oh! Well that's easy - that's because I am building the battery so that all the wiring and components can support each cell being safely loaded to ~1.55 C. Even though that's a relatively low C rate from the cell's perspective, that will be about 200A of current on the DC side. And since...
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    How to handle series connection in a moderately large 18650 battery build?

    Thanks for the information on the difference in connections! To be honest, I didn't even think of spot welding the 14awg series connections at the time. I just tried it on some spare nickel strip though, and it's actually a bit difficult. The spot welder's electrode tips are round, and the...
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    How to handle series connection in a moderately large 18650 battery build?

    Very cool! The copper wiring to connect parallel packs was an idea that was suggested by madin88 in this thread because I was struggling with the idea in the first place. I'm sure it will work out well! Thank you for the compliments! Yes and no. You probably recall (since you were the first...
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    How to handle series connection in a moderately large 18650 battery build?

    I wanted to follow up with progress of my build so that this thread can hopefully be of value to others in the future. I do want to preface this that I am an amateur and there are likely many areas where I could have done things better, and I welcome any and all feedback and criticism so I can...
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    How to handle series connection in a moderately large 18650 battery build?

    Gents, thanks so much for your feedback! I cleaned up the terminals on the side of the pack that I pre-soldered so I should be ready for spot welding nickel strips now. I was weary of using heat to remove the solder from the terminals, so I used my Dremel with a cutoff wheel to clean the...
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    How to handle series connection in a moderately large 18650 battery build?

    Thanks madin88. I do have a spot welder (the cheap DIY one from Banggood), but I am planning to get a Kweld unit if the DIY one doesn't work out well. The strips I have are in fact 0.15mm, but they were actually 4P strips that I cut in half for the visual example in the pictures I shared. I...
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    How to handle series connection in a moderately large 18650 battery build?

    Markz, thanks for your input. I did not clean the bars using isopropyl, but I did use a lot of flux when torch soldering the buss bar assemblies. Afterwards, I cleaned the buss bar assemblies with a wire brush and soap and water. I have thought about trying soldering paste for its lower melting...
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    How to handle series connection in a moderately large 18650 battery build?

    Hi, I'm building a 36P 14S portable battery using brand new Samsung INR18650-35E cells, and I would really like some help with brainstorming on how I can move forward from where I got stuck. This portable build is my first and I am taking it on as a learning experience, and as a precursor to...
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