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Best options to EASILY repurpose a 16s4p Battery with some dead parallel cells in the
#1
My 16s4p unicycle battery has 4 dead parallel cells that are in the 12th series position so they're right in the middle. The annoyance to disassemble is compounded in that it's not a normal rectangular battery but two stacks of 8s4p.
I'm not sure how much work I can do into replacing the dead cells as I don't have the proper equipment yet to do so.


Trying to explore the EASIEST options for not throwing out 60 good LG MJ1 cells. (I'm getting quotes of $300+ to repair the battery, which while i understand the cost, at that point, I'd rather just add another $200 and get a brand new battery)
I'm thinking these 3 options. am i missing anything?

1) sell the battery as is (what could i get for it), or break it up into individuals and sell by cell

2) ignore the last 4 packs in series, as the bad cell is the 12th one out of 16 . and reroute the wiring so that i have a 10S or 11S battery, perfect for a low voltage bike or skateboard. This seem easiest, but if i have to get another BMS because I can't use a 16S one on a 10S, then i might as well do it properly by snipping the connections to the last 4 series packs, and shaving its weight


3) reroute my bms so it ignores the connection between the dead cells and becomes a 15s to be repurposed as a bike battery or skate battery, (the dead cells essentially become a high resistance "wire"?. This seems not the best idea, but they're already at 0v and who knows how long i was already riding on them at 0v before i discovered the problem. This seems second easiest assuming i can reuse my existing 16s bms
Alternatively it'd be more work to disassemble, but i could snip the connections to these 0v cells and remove them and then rewire it to get a proper 15s for a ebike.
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#2
Interesting dilemma. Can you post some pictures of the pack?
Proceed with caution. Knowledge is Power! Literally! Cool 
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#3
thanks for responding so quickly
https://ibb.co/album/hj68tv

a big part of me just tells me to stop wasting time and buy a 100w soldering station and/or a malectrics spot welder, but i constantly vacillate between that and going cheaper with something like this

https://www.aliexpress.com/item/40005435...CBDpn&mp=1

or going all out and being lazy and spending my stimulus check and getting a new battery. But as i mentioned, i still don't want to waste 60 out of 64 usable cells.
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#4
ahh, yeah, that's gonna be a tough tear down and replace. and there's probably some kinda goo between the cells, so cutting strips on either end and sliding out and replacing is gonna be tough.

imho, that spot welder isn't worth it. There are other kits out there that are basically the same thing for less money. And some even come with dials to adjust the timing and power and even others with a screen.
I've seen a few different types listed here on the forum, though I can't recall them off hand atm.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
(this chat is not directly affiliated with SecondLifeStorage; VALID email req'd)
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#5
what would you do if you were someone like me without much experience (used for flashlights) but just watched a lot of youtube videos on builds?
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