Sixtysix 280ah Cells from Deligreen

[ArthurEld]

My 66 Deligreen EVE cells arrived today in 17 boxes
I am happy to say that the boxes are in pretty good shape.
One box was opened by customs. I opened that one and another one so far.

One thing I noticed is a "Made in China" sticker right on top of each cell.
I am happy to report that they peel right off.
Some of the black covers on the top of the cells aren't lined up perfect. But I don't suspect foul play.
I will add pictures to this thread as I proceed. My plan is to assemble four 48V batteries and have 2 spare cells.
The cells are probably all in spec but I want to check them out just in case.
Hopefully I will be able to use my test results to match up the cells. I don't know for sure if it will help me but I plan to keep records of each cell from the start.
April told me they spent a couple days or so checking the cells.
I assume they just check that they are in spec at the time of shipment. I didn't inquire about it much.
I didn't get a video of a cute China girl checking cells with a meter or a sign with my name written on it.
I have one cell code so far. I haven't tried to decode it yet.
02YCB66710000J 8AL0000070

 

[ArthurEld]

I started opening the boxes in the order written on the box. Then I am numbering the cells and sticking a post-it note on the cell with the cell number and the voltage. I am recording the numbers and voltage and scan codes and I will enter them on a spreadsheet. I will enter more info like internal resistance and capacity when I get it. My internal resistance tester hasn't shown up yet. I have only done 8 so far. They are all 3.29V according to my cheap multimeter. If I push the light button I get 3.31V. I think I will return that multimeter and get a better one.

 

[willo]

That's a lot of cells!

 

[Gazoo]

If I push the light button I get 3.31V. I think I will return that multimeter and get a better one.

LOL....yeah, mine doesn't do that. Looking good so far.

 

[ArthurEld]

I have unboxed 34 cells so far. No rush obviously.
I haven't noticed anything wrong with any of the cells.
They are all 3.29V so far.
Deligreen sent me a lot of wimpy busbars and stainless set screws and lock nuts. I'll use them until I get my think busbars.
Here's the info for 34 of my cells-

Cell #	Capacity	IR	Volts	Serial #	Factory
1			3.29	8990000818	H
2			3.29	8C90000254	J
3			3.29	8800000746	J
4			3.29	89X0000070	J
5			3.29	8B30000833	J
6			3.29	8B50002160	J
7			3.29	8AK0002309	J
8			3.29	8AA0002287	J
9			3.29	8AJ0002573	J
10			3.29	8AL0000070	J
11			3.29	8AH0000629	J
12			3.29	8920000077	J
13			3.29	89A0001131	H
14			3.29	8990001085	H
15			3.29	8990000796	H
16			3.29	8B60002328	J
17			3.29	8960000352	J
18			3.29	88D0000691	H
19			3.29	8970000776	J
20			3.29	89G0002223	J
21			3.29	8AK0000154	J
22			3.29	8920000010	J
23			3.29	89G0000053	J
24			3.29	8AK0002582	J
25			3.29	89Y0002162	J
26			3.29	8A70002230	J
27			3.29	8A60000309	J
28			3.29	8AE0002512	J
29			3.29	8BY0002617	J
30			3.29	89B0001611	H
31			3.29	8930002622	J
32			3.29	8920002207	J
33			3.29	8990000574	H
34			3.29	8990000605	H

 

[ArthurEld]

Finally got them all out of the boxes.
The only thing I noticed wrong with these cell is the corner of the black cover got pealed back on one of the cells from the box customs opened.
I'll stick it down with contact cement.
I also got 2 odd cells that have a different format serial number. #57 and #60 have the new serial #.
Every cell tested as 3.29V. My internal resistance tester is stuck in customs. I planned to check the internal resistance before I start charging.
I guess I could order one from Amazon next day. Then return it. I pay enough for Prime and buy a lot. So, I deserve a few free returns.

1			3.29	8990000818	H
2			3.29	8C90000254	J
3			3.29	8800000746	J
4			3.29	89X0000070	J
5			3.29	8B30000833	J
6			3.29	8B50002160	J
7			3.29	8AK0002309	J
8			3.29	8AA0002287	J
9			3.29	8AJ0002573	J
10			3.29	8AL0000070	J
11			3.29	8AH0000629	J
12			3.29	8920000077	J
13			3.29	89A0001131	H
14			3.29	8990001085	H
15			3.29	8990000796	H
16			3.29	8B60002328	J
17			3.29	8960000352	J
18			3.29	88D0000691	H
19			3.29	8970000776	J
20			3.29	89G0002223	J
21			3.29	8AK0000154	J
22			3.29	8920000010	J
23			3.29	89G0000053	J
24			3.29	8AK0002582	J
25			3.29	89Y0002162	J
26			3.29	8A70002230	J
27			3.29	8A60000309	J
28			3.29	8AE0002512	J
29			3.29	8BY0002617	J
30			3.29	89B0001611	H
31			3.29	8930002622	J
32			3.29	8920002207	J
33			3.29	8990000574	H
34			3.29	8990000605	H
35			3.29	89K0000616	J
36			3.29	8970000511	J
37			3.29	8970000546	J
38			3.29	89G0000467	J
39			3.29	89V0002046	J
40			3.29	8BY0002604	J
41			3.29	89V0000014	J
42			3.29	89L0000571	J
43			3.29	8980000090	J
44			3.29	89J0002307	J
45			3.29	88B0000302	H
46			3.29	8980000112	J
47			3.29	8AH0000431	J
48			3.29	8AJ0000055	J
49			3.29	8B40000607	J
50			3.29	8920002072	J
51			3.29	89X0000349	J
52			3.29	8990000547	H
53			3.29	8990000887	H
54			3.29	89F0002376	J
55			3.29	8870000108	H
56			3.29	88B0000331	H
57			3.29	2568335A0206	?
58			3.29	8A10002542	J
59			3.29	89R0002245	J
60			3.29	2068325A0070	?
61			3.29	89G0000771	J
62			3.29	8980000686	J
63			3.29	8980000213	H
64			3.29	89S0002561	J
65			3.29	89H0000503	J
66			3.29	89W0000625	J

 

[ArthurEld]

Strange serial # 2568335A0206

 

[Gazoo]

I have no idea what that label is with the strange serial number. Maybe it's from an earlier production but that's speculating.

I took a close look at the labels on my 8 cells. The part that contains the address code on mine are all the same: 02YCB6671000J.

The date codes on my cells are:
89H 89Y 8A2 8A5 89H 89G 8A1 8A8

 

[ArthurEld]

Do you know what the date codes mean?
The odd serial cells can be spares. I have 14 with the H location that probably should go together.

 

[Gazoo]

No. As far as I know nobody knows what the date codes mean and it's possible only EVE knows. EVE was asked and said they are the only one that can decipher the date code and they will not support cells not purchased from them. They said ask the supplier.

Good you can use the odd ones for spares. I don't know that putting cells together with the same location would make a difference, but that's what I would do.

 

[ArthurEld]

I will check the internal resistance and capacity to see if I get any clues. It will take a long time just to check capacity.
We'll see how far I get with that.

 

[TRW]

If you don't mind, I am curious about the cost, and where you actually placed the order?

 

[ArthurEld]

I ordered directly from April at http://www.deligreenpower.com/
I paid $6641 total for 66 cells using payPal. It wasn't the cheapest deal around but I was comfortable dealing with April and Deligreen.
Deligreen seems like a well established operation. It appears to be run by women from what I could tell.

 

[TRW]

Great info and thanks, it will be fun to see how it all works out for you. I likely missed what you have for a system, and this will be big battery pack, can you give me an update on your system, can I assume you are off grid?

 

[ArthurEld]

My house is on grid and I am having a grid tied system installed. with battery capabilities.
I only need batteries for grid failure. And even then I mostly need batteries so I can use solar while the grid is down.
So, my plan is to leave the batteries disconnected. If the grid goes down I will connect the batteries until the grid comes back up.
That's not using all of the capabilities of my fancy hybrid inverter but it is still nice. If power ever goes down for a long time most of my neighbors with solar will be jealous of my DIY system.

 

[TRW]

I am a security lover, so I would like to end up with a system like yours, and plan to at some point. Thanks for all the good info and good luck with it all. My experience is that now that you have the back up system, your grid power will become totally reliable!

 

[ArthurEld]

I have been through many long outages. But it would be preferred that I never need to use my batteries.

 

[schmism]

Do you have a thread on the rest of your build? Why 66? 2 extra in case?

You going to run a 4P-16S config? What are you plans for a rack/enclosure?

 

[ArthurEld]

Do you have a thread on the rest of your build? Why 66? 2 extra in case?

You going to run a 4P-16S config? What are you plans for a rack/enclosure?

I'm in the process of getting solar permits.
16S-4P so 4 BMSs
I plan to use four 12" or 14" x 30" heavy duty selves. I am still debating on my cell configuration.

I kind of like this configuration but I don't hear much talk about it. The compression fixture is a bit more complicated and the busbars will need to be more uneven lengths.



And yes I bought 2 spares.

Here's another couple links about my project that I guess I should have included in my original post-

Multiple battery

I plan to use multiple 48v 280a battery packs. My hybrid inverter / charge controller manual says to connect the batteries parallel. How do I keep the other batteries going if one BMS needs to disconnect?

diysolarforum.com

Hedges helped me a lot with my electrical panel on this one and I will be asking him more questions soon-

Please help me with panel placement

I've been working on my solar panel layout and I need to know if there is anything wrong with my ideas. It seems doable to me but I don't have any experience. Please tell me what you think. I really want to be comfortable with my ideas before I apply for permits and order everything. I will...

diysolarforum.com

 

[AussieSim]

Strange serial # 2568335A0206

View attachment 25373

I have 8 cells from Luyuan with that QR serial format