Michael B Caro
Solar Wizard
- Joined
- May 21, 2020
- Messages
- 1,194
From some of the things I am being told the Lishens may actually be better.....but I will not be convinced until Craig's testing is done
New Supplier for 280Ah cells: Shenzen Basen
- Thread starter Haugen
- Start date
It depends how you define better.
Most reputable manufacturers quote 2000-3000 cycles 80% capacity for LiFePO4 prismatics
Others quote 8000 cycles ?
Lithium Iron Phosphate Battery Cells 12V 100Ah
4pcs 3.2V 100Ah Lithium Iron Phosphate Battery Cells. 4000~8000 Cycles Life span. Could be Charged as low as -15°C Temperature. Nickel-copper Bus Bar & M8 Screw Included. Test Standard:IEC 62619: 2017 by TUV Rheinland NOTICE:DELIVER TIME ABOUT 20~30 DAYS.
www.sokbattery.com
Good and bad news today.
Only 12 of the 16 cells in the 2nd order were delivered today.
Hopefully, the 4th box will show up tomorrow.
I unboxed the first shipment, and even though the boxes were a little worse for wear, the cells are beautiful!
I did a quick voltage check and every cell is at 3.498V or 3.499V. I like that Basen puts a label on each cell with the internal resistance and voltage on it.
I'll test that in the days to come.
I received 18 bus bars that are all exactly the same and much nicer than the ones I received from UNIS. I also received 41 screws with captive flat and lock washers.
I'm pretty pleased with what I see so far.
Though I will be building my own bus bars and probably not using the screws, it's a big leap in quality from the UNIS bus bars which were all different lengths and so thin, they weren't good for more than 40A.
Only 12 of the 16 cells in the 2nd order were delivered today.
Hopefully, the 4th box will show up tomorrow.
I unboxed the first shipment, and even though the boxes were a little worse for wear, the cells are beautiful!
I did a quick voltage check and every cell is at 3.498V or 3.499V. I like that Basen puts a label on each cell with the internal resistance and voltage on it.
I'll test that in the days to come.
I received 18 bus bars that are all exactly the same and much nicer than the ones I received from UNIS. I also received 41 screws with captive flat and lock washers.
I'm pretty pleased with what I see so far.
Though I will be building my own bus bars and probably not using the screws, it's a big leap in quality from the UNIS bus bars which were all different lengths and so thin, they weren't good for more than 40A.
What is the link/source of these cells? (too many suppliers)
Did you mean 3.298?
So now that you have actually looked at the busbars, how many amps to you think they are capable of? Will doubling them up help much? I have the same busbars, and screws.
ArthurEld
Solar Wizard
He probably did mean 3.29
I don't think it is possible to keep these cells at 3.5V for over a month.
I have the same busbars and I plan to double them for the connections they fit. I ordered .125 x .75 x 6ft copper bar to make the longer ones I need.
Thanks for the feedback,I'm happy I just ordered Eve from Basen. Was kind hard to get 17 cells instead of a multiple of 4 but they accepted it.
Yes he means that, look closely first picture, voltages are on each sticker.
I just bought 17, even if they were not that excited to this idea, they accepted it (Basen).
Receive 16 280ah battery from Basen. All battery perfect condition, no scratches at all. the posts are very clean, perfect. asked for double bars and received them.
All batteries voltage 3.30v
Now is time to built crate/box. Will not top balance until they are pressed together.
All batteries voltage 3.30v
Now is time to built crate/box. Will not top balance until they are pressed together.
3.298
I had a good conversation with him and came back in and used my memory to make the post. The important part was that they were all within 1mV.
Sorry for any confusion.
I have to build a bunch more wire pairs to expamd from 4 to 16 cells going to the datalogger and I can start some testing.
Probably should have thought ahead on whether my inverter will work on 48V.
I might have to go buy a new one. ?. Darn! ?
I got that wrong. My Solar installer arrived as I was checking the voltages.
I had a good conversation with him and came back in and used my memory to make the post. The important part was that they were all within 1mV.
Sorry for any confusion.
I have to build a bunch more wire pairs to expamd from 4 to 16 cells going to the datalogger and I can start some testing.
Probably should have thought ahead on whether my inverter will work on 48V.
I might have to go buy a new one. ?. Darn! ?
That doesn't sound right to me.
I'm not well versed in calculating Busbar Ampacity but:
The dimensions shown are 2mm x 20mm (40 mm²)
I can't find a good metric ampacity table so this one will have to do
The smallest busbar on that list 1/8" x 1/2" is also roughly 40 mm²
and is rated for only 150A DC
For reference 40 mm² = 79,000 circular mils = a cross section in between 2AWG and 1AWG
Maybe someone with more knowledge than me clarify, but based on the above I would not trust those busbars to carry anywhere near that much current safely.
"Copper Busbar Rating - Austral Wright Metals -" https://www.australwright.com.au/technical-data/advice/copper-busbar-rating/I'd be also curious to have some expert's opinion on this. The only rule of thumb I found is 1.4 x area in mm2 for copper. That would make 56Ah for a 40mm2 section ?
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