DIY BATTERY replacement (building from cells)??
08-04-18, 01:53 PM
#1
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DIY BATTERY replacement (building from cells)??
anybody here replace their e-bike battery themselves? I have read online that you can order like 50 or whatever number lithium ion AA cells and then solder them together to make for a much cheaper battery replacement alternative
thoughts?
thoughts?
08-04-18, 03:22 PM
#2
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I was thinking of going that route myself, but from what I read you need to weld the cells together, not solder. I guess the time it takes to solder will result in heating the cells too much, and can damage them. I guess the welder to do it right costs a couple hundred bucks, eliminating your savings. I would look into that before building a pack. If you can do that, I see no reason not to diy it! Makng battery backs isn’t that difficult.
08-04-18, 03:33 PM
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You might check this out.
https://makezine.com/2017/05/26/diy-...atteries-book/
and/or other references on the web.
https://makezine.com/2017/05/26/diy-...atteries-book/
and/or other references on the web.
08-04-18, 03:37 PM
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Solder has problems. You can't rely on solder joints to add any structural strength. It will crack long term. Heat can damage cells. Better to use a spot welder, but then you have to buy one for $150-200 or build one. Still have to buy nickel strip, spacers, etc. Add a BMS board for $15. Not that cost effective for just one battery. OK if you like to learn new things.
I have soldered up a pair of 12V booster packs taking cells out of a donor battery. That was only 9 cells. Tedious work. First one was OK. second one, I did a lousy job and I haven't used it. It's sitting outside in the grill.
I have soldered up a pair of 12V booster packs taking cells out of a donor battery. That was only 9 cells. Tedious work. First one was OK. second one, I did a lousy job and I haven't used it. It's sitting outside in the grill.
08-04-18, 10:08 PM
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The other challenge (IMO) is procuring genuine cells since there are fakes on the market. Decided it wasn't worth the time for me.
08-06-18, 11:56 AM
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and if you screw up, there is the fire and the funeral.....
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