Beginners Guide to Processing 18650 Cells | Cell Database


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Bob's Powerwall Project
#21
I just use a standard glue gun. I actually go a small one (used for small arts/crafts; got it in that section @ Wally World) as I didn't want to deal with a large stick of glue and handling a large gun.
I think a glue gun is a glue gun in this instance. I doubt it makes much of a difference like the soldering irons do
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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#22
(06-06-2017, 10:32 PM)Korishan Wrote: I just use a standard glue gun. I actually go a small one (used for small arts/crafts; got it in that section @ Wally World) as I didn't want to deal with a large stick of glue and handling a large gun.
I think a glue gun is a glue gun in this instance. I doubt it makes much of a difference like the soldering irons do

Thank Korishan, I am alway prone to buying the wrong crap thus the reason I ask. I agree, it's not like the soldering iron. I will likely get something from Wally World.
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#23
(06-06-2017, 10:15 PM)Robert Baumer Wrote:
(06-06-2017, 07:59 PM)owitte Wrote:
(06-06-2017, 02:52 PM)mike Wrote: I think you are wasting time and electricity doing a refresh test (3 iterations). If the cell is bad, it's going to show poor performance on the first test, in terms of heat and/or low capacity.

yes, that's right. Me too, I'm just doing one charge/discharge/charge cycle. But onlöy the discharge part is done by my OPUSses, both charge parts are done by TP4056s. I made two banks of them, one for pre-charge and the other one for charging after the test, so I don't get confused which cells are already processes and which are not...

I just ordered the parts to build 40 of those TP4056 and since my computer PS can handle up to 120amp, I should be good to go.....

Here is the video I watched: https://www.youtube.com/watch?v=KoHtxZG7leQ

I bought 4 packs of 10 of these: http://www.ebay.com/itm/272584526723_trk...EBIDX%3AIT

and I bought 5 sets of these: http://www.ebay.com/itm/172546327816?_tr...EBIDX%3AIT

I'd like to find that wire stripper he uses in the video.

-Bob

Hi Bob,

here's the wire stripper, I have one of those: Pressure adjustable, works fine from very thin wire to thick solar cables.

And here's a picture of one of my TP4056 chargers:

As you can see, I also use it to charger other types of Li-Ion cells Smile

Have sun!
Oliver
Korishan likes this post

permanently on battery from:
- 2017/05/20 - 2017/07/01
- 2017/07/02 - 2017/07/25
- 2017/07/26 - 2017/08/16
- 2017/08/17 - 2017/09/24

- 2017/09/26 - ?
What's left: my current grid consumption
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#24
(06-06-2017, 10:32 PM)Korishan Wrote: I just use a standard glue gun. I actually go a small one (used for small arts/crafts; got it in that section @ Wally World) as I didn't want to deal with a large stick of glue and handling a large gun.
I think a glue gun is a glue gun in this instance. I doubt it makes much of a difference like the soldering irons do

I just bought a Ryobi Lithium and it was worth the money. I used it today and it works like a charm and not having a cord is awesome. I am sure it runs on 18650's!
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#25
LOL, Awesome! And when the controller BMS goes dead, you have some more lithiums to grab Wink
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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#26
Now now, we all know how to jump start the batteries when the BMS fails!
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#27
Woo hoo, I have almost enough cells for my second pack. I am debating on waiting until I have all 14 packs worth of batteries and then start sorting or just try to stay with a 2500 mAh average. My first pack came in at 302,619 mAh at 120 cells. I can soon start posting pics! Big thanks to Mike and Korishan for the OPUS advice, now I do charge/test rather than discharge/refresh. Now I just need my TP4056's to come in, they are on one of those slow boats from China.... Oh yeh, and those 3 OPUS chargers that I believe were totally fake. I give them till June 28th to get me the product, if not, follow through with getting my money back from eBay
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#28
Help please.....

I have an old Dell 42u closed cabinet that I plan to reuse for a battery cabinet. Being that it is only 19" wide or 20" if I strip out the posts, I can on fit maximize capital by putting in two banks of totaling 14s450p. Does anyone see a problem with this? I have been looking on eBay for shelves that will supply the weight and I plan to use a .25 inch acrylic to insulate the bottom and another .25 acrylic as a guides. The shelve can only hold 500# o weight each.

Please let me know if this is doable.

Bob
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#29
Note that 14s450 is 300kg of batteries Smile

If you start ripping out the posts that in most of the rack cases do carry the load it can be a bit flimsy.
Im not sure you should squize it to much. Some air between the packs is healthy for them Smile On the other hand someone need to test.
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcomming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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#30
Crap, that means the shelves I am looking at will not hold the weight, it looks like I will need some metal reinforcements, oh wait, that 14s450p would be distributed across 3 shelves and do to size I could only fit 6 shelves. I definitely am going to be a guinea pig for this one. If all goes will I will have two banks of 14s45Op capable of delivering almost 100 KwH of service.

I have another idea, has anyone toyed around with a RAIB50, Redundant Set of Inexpensive Batteries? In my configuration I will have a 15th battery set that will not be usable, but was looking for use it for an automatic spare. I guess this is just a dream or perhaps a battery management solution can do this.
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