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Building an 18650 power pack!

CharlesR-22

Oct 17, 2022
1
Joined
Oct 17, 2022
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I'm looking for some advice for building a 12V battery with 18650 cells. So far I've built a battery using Sinopoly prismatic cells and Headway cells. However, 18650s just seem to be so hard to find for a good price and decent quality that I've shied away from them. Still, I'd like to try building one.

So this post is to get some advice on how to go about that. I don't have a spot welder but I can solder although I don't know if that's really a good idea for these cells. One thing I'm wondering is how many cells should be in series for a typical 12V battery? I'm thinking of something around 60Ah so if we are using 3s it would mean a 3s24p pack with 2500mA cells. With LiFePO4 we do 4s batteries but apparently with the lithium 18650s we do 3s?

Any thoughts on methods to hook these together would be appreciated. If it helps, the modem batteries I'm looking at are here https://18650batteries.nz/product/samsung-32e-18650-3200mah-6-4a-battery/

The specs are here https://cdn.shopify.com/s/files/1/0...sung_32E_Specification_Sheet.pdf?v=1614810892

Thanks in advance!
-C
 

73's de Edd

Aug 21, 2015
3,463
Joined
Aug 21, 2015
Messages
3,463
This feller uses some admirable techniques . . . .watch . . . adapt some . . . specific / particular . . . tips / aspects . . .of it to your utilization.
Probably, yours will be a downscale from this.
BTW . . . at 11:47 time mark, personally, I would have initially pre tinned a solder blob onto the nickel strip and THEN press the pre tinned wire end into the solder blob for creating a merged re flow soldering.

INTERESTING WATCH !

Building a 3.5kWh DIY Solar Generator for $650 - Start to Finish
 
Last edited:

Bluejets

Oct 5, 2014
6,083
Joined
Oct 5, 2014
Messages
6,083
Don't forget individual cell protection ....that is some serious fault current there.
 
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