e-bike harvesting, what a pain in the butt!

m6yru

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Joined
Sep 6, 2017
Messages
54
here is a video of me harvesting a pack, if you're a newbie you'll know now what a pain it is to break them down...
laptop= easy to remove tabs but more crap on battery for little harvest
e-bike= takes long time to remove the tabs, generally cleaner battery, bigger harvest of batteries

one pack of e-bike cells was full of glue stick

watch for my slice n diced and spark!

it took 29 mins for the pack to be harvested, the video is set to 4x the speed in most of it for you viewing pleasure lol hahahaha
 

Korishan

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Good video showing the process. A few notes:
* You need one of those retractable click style blades. That way you can have it about 2mm exposed and just run down the outside of the clear plastic w/o worry of hitting the cells inside.
* Some smaller wire snips, help keep them from shorting stuff out. Also, maybe some flush mount snips for getting those left behind pieces of tabbing off the cells.
* Instead of placing your hand and trying to lever against it, use a piece of 1 or 2 by piece of lumber. That way your insulated and you can pry against it easier.
* Try to roll the tabbing instead of straight pulling up. This will minimize possible cell damage as some of the welds can be nigh impossible to remove. If you had a longer pair of pliers, you could roll them easier. Like long needle nose pliers. Can get them cheap at places like Harbor Freight or 2nd hand stores of the sort.
* To do a quick voltage check, just leave the tabbing on the one side alone, as this gives you a large plane to hold on to. Then you can quickly probe the other side to get your voltages.
* And lastly, and I'm sure you're aware of it, your volume is a wee low ;)

But all in all, I'd rather do eBike batteries than laptop ones. That process looks a lot easier to do and more cells for the reward. Not to mention the cells are probably a lot newer and haven't been quite as abused. Sure, they may have been run down a few times. But, the eBike batts probably haven't gone through no where near as many cycles. Plus, kinda hard to charge the bike while riding it, so they were full cycles and the BMS was able to do it's work more effectively (I would assume so, anyways)
 

m6yru

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Joined
Sep 6, 2017
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54
now just waiting for a opus n cell holders, here is 212 cells harvested




image_xjvtjj.jpg
 

Gerard Achternaam

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Sep 5, 2017
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Dammit, I watched 13 minutes and then the batteries are still in their cover! For most of the film you seem so gentle as if you want to be able to put it back together again :)
 

m6yru

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Joined
Sep 6, 2017
Messages
54
GerardAchternaam said:
Dammit, I watched 13 minutes and then the batteries are still in their cover! For most of the film you seem so gentle as if you want to be able to put it back together again :)

no not gentle at all, i sliced myself twice doing that one pack and the unit the batteries is on a level surface but with the pressure i was putting on the pack and yanking on them even they was sliding about...
to take the batteries out the black holder was just 4 little screws and would have been pointless showing that part IMO the video was "long enough"


Korishan said:
Good video showing the process. A few notes:
* You need one of those retractable click style blades. That way you can have it about 2mm exposed and just run down the outside of the clear plastic w/o worry of hitting the cells inside.
I have some somewhere but never to hand when i need them, this knife i use for everything :D
[quote pid='15120' dateline='1506783438']

* Some smaller wire snips, help keep them from shorting stuff out. Also, maybe some flush mount snips for getting those left behind pieces of tabbing off the cells.
will need to look into investing in some, just dont want to use my best pair for this job that i use for my electronics lol

* Instead of placing your hand and trying to lever against it, use a piece of 1 or 2 by piece of lumber. That way your insulated and you can pry against it easier.
next set of batteries i will try this thanks for the tip, im new to doing this ;)

* Try to roll the tabbing instead of straight pulling up. This will minimize possible cell damage as some of the welds can be nigh impossible to remove. If you had a longer pair of pliers, you could roll them easier. Like long needle nose pliers. Can get them cheap at places like Harbor Freight or 2nd hand stores of the sort.
the other batteries i was able to (normal tabbing wire) but this was shaped and cut into so when you do pull it the tabbing wire tares in many peices sigh.... see pic below

* To do a quick voltage check, just leave the tabbing on the one side alone, as this gives you a large plane to hold on to. Then you can quickly probe the other side to get your voltages.
as a newbie i didnt think of this lol hahaha thanks again for the tip

* And lastly, and I'm sure you're aware of it, your volume is a wee low ;)
actually i am a quiet person, talk a lot but at a reduced volume hahaha this is why the bumps n bangs was louder than me

But all in all, I'd rather do eBike batteries than laptop ones. That process looks a lot easier to do and more cells for the reward. Not to mention the cells are probably a lot newer and haven't been quite as abused. Sure, they may have been run down a few times. But, the eBike batts probably haven't gone through no where near as many cycles. Plus, kinda hard to charge the bike while riding it, so they were full cycles and the BMS was able to do it's work more effectively (I would assume so, anyways)

this is my thoughts toothat the bike has taken it below BMS charge voltage and the BMS then says its got a faultybattery so you cant charge it....
people with laptops i find (including myself) run the hell out of the little wee cells

[/quote]
image_vflrwg.jpg
 

DiggsUt

Member
Joined
Oct 30, 2019
Messages
65
At least the cells are recoverable. One of my packs is epoxy potted. Everything was put together and then filled with epoxy. Great for durability. Not so much for re-usability. Not sure what happens if a cells vents....

pack3.jpg

@add - No deletes here? Sorry, didn't see this was an ancient necro'd thread.....
 
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