Beginners Guide to Processing 18650 Cells | Cell Database


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Hover Board Packs from Ebay
#11
(05-13-2017, 05:33 PM)Robert Baumer Wrote:
(05-13-2017, 03:10 PM)Droid126 Wrote: They are supposedly new cells in packs that were either destined for hoverboards or were removed from unsold hoverboards, that isn't entirely clear yet.

I have tested 3 so far; 2156, 2172, and 2192mah.

There would be nothing stopping you from rewrapping them. That's just not something I want to do, so if I can avoid it I will.

What kinda numbers should we expect from a 2.2mAh battery?

If rated is 2200 im happy with 2150+, I have a couple of other 2200mah LGs that measured 2200-2350, but those were from laptop packs
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#12
(05-13-2017, 03:10 PM)Droid126 Wrote: They are supposedly new cells in packs that were either destined for hoverboards or were removed from unsold hoverboards, that isn't entirely clear yet.

I have tested 3 so far; 2156, 2172, and 2192mah.

There would be nothing stopping you from rewrapping them. That's just not something I want to do, so if I can avoid it I will.

What charger /discharger are you using to measure the cells?
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#13
(05-13-2017, 06:21 PM)The-J-Man Wrote:
(05-13-2017, 03:10 PM)Droid126 Wrote: They are supposedly new cells in packs that were either destined for hoverboards or were removed from unsold hoverboards, that isn't entirely clear yet.

I have tested 3 so far; 2156, 2172, and 2192mah.

There would be nothing stopping you from rewrapping them. That's just not something I want to do, so if I can avoid it I will.

What charger /discharger are you using to measure the cells?
Accupower IQ-338 charge at 1A, discharge at .5A.

And 4 Aliexpress dischargers, 2 set for .5A, and 2 set for .75A. [Image: 70b9575606a9ad5019c41ec8db590495.jpg][Image: 62118777bdad87d56d1c7ea88077949a.jpg]
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#14
Im using packs from hoverboards for my build as well but my packs are a bit different.

Jehu said the seller has some with samsung cells as well, so far I have only seen LG cells from people that have bought them.

I have attached some pictures of how my packs are set up.
They are pretty tightly packed but no glue at all! The metal connectors come off quite well once you figure out the best technique.

It says 
           ICR18650-22P M
           Samsung SDIEM
                           5FX4
on every single cell from every pack I have disassembled so far. The 5FX4 is the date stamp of production and so far all cells have been produced on the same day it seems.
I cant find exact datasheet on the cells (only for ICR18650-22P) but from what I have gathered googling the M behind the P and the M after SDI means its Samsung SDI Malaysia. 
If you look closely there is other text under the wrapper, been googgling about what these codes mean but cant get proper info that matches my codes.

About 300 of the cells have been tested by myself so far with an OPUS BT-C3100 v2.2 and they are coming in at 2200-2400mAh, so realistically 2000-2150mAh. My iMax B6 showed 2010mAh on the one cell I tested on it (cutoff at 3V.)

Still dont know if they are genuine cells but I sure hope so  Big Grin

I can only recommend these packs though (as long as they are genuine) if someone else finds them!
 

(05-13-2017, 06:29 PM)Droid126 Wrote:
(05-13-2017, 06:21 PM)The-J-Man Wrote:
(05-13-2017, 03:10 PM)Droid126 Wrote: They are supposedly new cells in packs that were either destined for hoverboards or were removed from unsold hoverboards, that isn't entirely clear yet.

I have tested 3 so far; 2156, 2172, and 2192mah.

There would be nothing stopping you from rewrapping them. That's just not something I want to do, so if I can avoid it I will.

What charger /discharger are you using to measure the cells?
Accupower IQ-338 charge at 1A, discharge at .5A.

And 4 Aliexpress dischargers, 2 set for .5A, and 2 set for .75A.

Ahh I see, nice. I was pretty much just wondering if you are using an OPUS as well since I know how inaccurate they are...


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#15
What voltages have the batteries been when they arrive?

I've got 400 LG cells coming this week.
 CyberWall #1 DC2DC 7S80P 2300mAh avg Cell #2 DC2AC 7S80P 2200mAh avg Cell LG MF1
Chargers: 1xEV-Peak CQ3 400W 4 Chan(with DIY 6S cradle allowing 4x6S1-3P) 7x Foxnovo 4S  -- 20xTP4056
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#16
(05-15-2017, 01:34 AM)Scepterr Wrote: What voltages have the batteries been when they arrive?

I've got 400 LG cells coming this week.

They were all right around 3.6v
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#17
(05-15-2017, 01:34 AM)Scepterr Wrote: What voltages have the batteries been when they arrive?

I've got 400 LG cells coming this week.

nearly all at 4V for me  
5 packs were deeply discharged, one was at 6V, some at 12, 15 and 20 (36nominal). Revived them all after disassembly with a 200mA charge to 3.2V then charged them normally. They have tested with better results then others that arrived at 4V.
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#18
Got the cells in, man they look funky, don't exactly match any MF1 cells I've seen being sold, very perplexing. 1 one of the 20 packs looks like the cells leaked or some kinda chemical reaction, its spotted under the wrapper and its positive cap looks different from the rest, larger gap around the side. Will start testing over the weekend and sticking the first 27 into my e-longboard for some real performance testing. 

Just noticed they're a diff model too, B4 not MF1
Edit: seller sending replacement MF1 pack


Oh and if anybody is curious, 10 packs came with the big bms in the middle and 10 with the small bms on the side. Does anybody have specs on those?
 CyberWall #1 DC2DC 7S80P 2300mAh avg Cell #2 DC2AC 7S80P 2200mAh avg Cell LG MF1
Chargers: 1xEV-Peak CQ3 400W 4 Chan(with DIY 6S cradle allowing 4x6S1-3P) 7x Foxnovo 4S  -- 20xTP4056
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#19
First 40 cells through first test cycle, I kept them in the pairs they came in for now, 1A per pair charge and discharge, 4214-4369mah
 CyberWall #1 DC2DC 7S80P 2300mAh avg Cell #2 DC2AC 7S80P 2200mAh avg Cell LG MF1
Chargers: 1xEV-Peak CQ3 400W 4 Chan(with DIY 6S cradle allowing 4x6S1-3P) 7x Foxnovo 4S  -- 20xTP4056
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#20
I bought 11 packs and no two were the same construction. Different BMS, different adhesive, different layouts, different wire colors. I've also found some LGDAMF... and LGEAMF so far.
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