KauaiMolokai
Solar Enthusiast
- Joined
- Dec 25, 2019
- Messages
- 283
RJ Lithium looks like a GREAT connection. Thanks for posting
Bus bars - they are nickel plated copper, thickness is roughly .065", overall length = 3.1", holes will take up to .25" stud, slots will take on-center distances between studs from roughly 1.9" to 2.3".
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--mark
And as we all stated earlier -- for some reason DELIGREN (China) has really dropped their battery prices down .. the last 16 we have got from the (8 at a time) was all Brand new - Grade A - and had slightly higher aH then they were sold for -- and I think we paid right at $880 delivered for 8 ... so while we like RJ Lithium because they are great suppliers - for us its all about the money and the savings and we pass that onto the customers -- so for right now we are keeping DELIGREEN busy ...
What can you say about the physical condition? Some of the blue aluminum cells from resellers have been reported to be pretty sloppy, pitted terminals, sloppily applied top covers stuck over the original cover and qr code, flimsy sidewall, skimpy busbars.
But a lot of the blue cells have been pretty solid quality as well. The 150AH cells posted by @Xiryx look great (I believe those are sold by BLS manufactured by HiGee). Not as strong or robust as CALB and SinoPoly but for most people that doesn't really matter.
What are your overall impressions of the Deligreen cells physically? Am I right in assuming these are the 190 or 200 ah cells manufactured by CATL with QR's removed?
Looking forward to your test results, BLS cells seem to have increased in price recentlyI received my order of 16pcs 150Ah cells from BLS yesterday. This was the timeline:
2019-11-29 Order placed
2019-12-02 UPS tracking number received
2020-01-08 Tracking number traceable in Germany
2020-01-13 First scan of the parcels
2020-01-15 Goods delivered in Sweden
I've not yet paid any additional fees, duties or taxes.
The packaging was very well done and arrived in perfect condition. The bus bars and fasteners included were of the same type as pictured by Xiryx above. The bus bars are made of two layers, each about 0.75 mm thick and 20 mm wide, for a total ~30mm2 section.
I'll try to take time this weekend to start doing capacity testing of each cell.
Looking forward to your test results, BLS cells seem to have increased in price recently
I received my order of 16pcs 150Ah cells from BLS yesterday. This was the timeline:
2019-11-29 Order placed
2019-12-02 UPS tracking number received
2020-01-08 Tracking number traceable in Germany
2020-01-13 First scan of the parcels
2020-01-15 Goods delivered in Sweden
I've not yet paid any additional fees, duties or taxes.
The packaging was very well done and arrived in perfect condition. The bus bars and fasteners included were of the same type as pictured by Xiryx above. The bus bars are made of two layers, each about 0.75 mm thick and 20 mm wide, for a total ~30mm2 section.
I'll try to take time this weekend to start doing capacity testing of each cell.
Let's hope it's just a balancing issue! Because yes the cells may have arrived at the same voltage, but because they are sent with around 50% SOC (which is good) they are in the flat part of the Voltage v. Amphours curve. So it could be that the first cell was actually at 45% SOC while the others where as 55% and still showed a very close voltage.
Did you do a top balance during your initial charge? Or did you just stopped the charge according to the voltage of the whole battery? Following the individual voltages of the cells during charge should be quite informative.
Anyway you'll know more after the balancing process.
@astronom Looks like you have the same cells? Did yours all test at 100% or better?