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Sailboat Powerwall
#1
Starting a thread to document my progress. Main goal is to build a pack sufficient enough for ~400w solar and ~500w wind for my sailboat. I've played with some deep cycle lead acid, but the space they take up and weight makes them super annoying to work with. These cells are great since I can make odd shaped packs to fit in places I would never fit a lead acid. 

I'm about a month into collecting packs and have around 580 "good charged cells" ready for load testing. Finally I have a few stores that are setting packs aside for me. (Pro tip, bring Little Caesars gift cards, especially if you are getting them free of charge, if you want to make a lasting contact for future hauls) 

Right now I'm charging everything with more than 1v on a Nitecore I8. I've got some bits on their way from China. 
-20 TP4056 charging modules?
-10 ZB2L3 discharge testers ⚡
-30 1x 18650 holders ✊

Thanks, more to come!


 



jdeadman and Korishan like this post
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#2
Looks great, i'd be interested if you come up with any crazy shapes for the batteries!
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#3
It's always immensely satisfying to see a number of cells on a workbench or in a box Smile
If these are the ones you kept for testing you should go through them again and sort out the rusty ones. I can easily spot a few rusty cells just from the picture, probably one battery that had all these inside.
hbpowerwall, Korishan, completelycharged like this post
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#4
Yep, no rusty cells to be used. Especially if the Pos end is where the rust is at. That's asking for major problems down the road.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Dollar Shave Club. Best Razor I've ever used
Certified 18650 Cell Reclamation Technician
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#5
Thanks for the tips on the rusty cells. I tossed most, but kept a few that had the least rust with high voltage. I'll just put them in the scrap bin.
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#6
Photo 
Due to these Sayno cells consistently heating 300% more while charging than any other manufacture's cell I've removed them from the mix. Instead they'll be used for the first experimental pack. -121 makes 496 cells. 

Check out my Instagram if you're interested @sailingdetroit

   
hbpowerwall likes this post
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#7
The usual problem with Sanyo cells. You can make them stop heating up but it is such a pain in the butt and requires a lot of time and it still isn't 100% guaranteed that they will stop. I'm not bothering with Sanyo cells anymore because of that.
goeielewe likes this post
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#8
Hey look! A string of fire crackers! Hopefully not the rapid firing ones Tongue
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Dollar Shave Club. Best Razor I've ever used
Certified 18650 Cell Reclamation Technician
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#9
(03-02-2018, 12:37 PM)Korishan Wrote: Hey look! A string of fire crackers! Hopefully not the rapid firing ones Tongue

I wonder if sending all 121 into thermal runaway at once will get the fire department called. "Don't worry guyz, it's for YouTube"
Korishan and completelycharged like this post
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#10
LOL! Cool
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Dollar Shave Club. Best Razor I've ever used
Certified 18650 Cell Reclamation Technician
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