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I really do not know who is assembling packs of sodium ion cells at the moment. I find it unlikely that sodium watt is producing their own cells at this time but who knows. The pack mentioned is a 4s pack as sodium cells have a nominal voltage around 3.1V. This means the operating range of that...

At 400Ah we are likely talking about CA400 cells. The CALB CA400 cells are very old. They have not been manufactured since ~2013. Unless you are getting a really good price I would pass. Edit to add a picture

To Add to this, some manufacturers sell direct now EVE sells direct on alibaba, $120 EXW starting Highstar sells EVE LF280K cells as their IFpP71173208-280A cell, for now, Yes, their Alibaba listing does not support this, but I've confirmed it with them directly. (Cannot ship DDP though, FOB...

Code decoding standard, informative but not super understandable: https://www.codeofchina.com/standard/GBT34014-2017.html Code breakdown: 1-3 - unique manufacturer Id, 07H = Higee 4 - battery type, C = cell 5 - Chemistry, B = lithium iron phosphate 6-7 - manufacturer product code, not unique...

Seeing as LMFP cells are still mostly an upcoming chemistry, I figured I would try to be ahead of the game and test out some of what seems to be the first LMFP cells on the market. Hui Li Yuan (HLY) is generally a smaller NCM and LFP cylindrical cell manufacturer, recently however they've...

So, having looked into the question also because I am also receiving samples (70Ah Highstar, no sheet shareable [yet?]). There are not any dumb BMS's on the market that are preconfigured for sodium ion cells. You will need to get a smart BMS and program the settings for it. I took a quick look...

Yea because they don't have em yet. I know, I asked. They are just pre-adevtising them. Kinda annoying tbh. I wouldn't expect them untill next summer.

Edit: from my experience so far also, only Narada adds the extra RC to the end of the Chinese QR code system. Id bet one of the less experienced QR fakers got ahold of the cell. They copied the Lishen Datamatrix code format. But didn't fully understand how to fake the rest of the QR successfully...

They are not lying about the hole. During the assembly process the cell windings are inserted and secured by welding the top plate of the cell on. Then they fill the cell with the electrolyte via that small hole. After filling it is welded shut with a plug. Cant say on the qr yet with the...

No ?. On a more serious note, I will when I can. This is also a pre-production sheet, what was announced at the event yesterday were much better.

General idea is to replace. However, you can test the DC internal resistance, decently easily if you have a multimeter and a controllable load like a battery fan tester. If not oh well. I have the datasheet up I believe in the resources if you need it. Also I'd like to ask, do those Highstar...

No. There is not readily available gear that can use them properly due to their high working voltage range. Roughly 2v to 4v per cell. Beyond that they are lower capacity and lower nominal voltage. This mens they hold a lot less energy. The sodium ion batteries you mention (Rebranded CY 220ah)...

Just watch out as they are a centimeter thicker than the standard 271-315ah cells.

Factory EVE Shipping box, not the original cells in it, still EVE cells though. There is another sheet like the one shown on the top under all the cells. You very well may get a different boxing solution however. There is no way the new EVE terminals would have fit in this box.

I've not heard of them but they do list such a cell size on their site. The vent direction doesn't like up but I couldn't tell you if their picture is a model or not. Edit: Cornex has a Alibaba, you are dead on correct and their website is wrong. Well done. Edit #2: Seplos does sell a...

Edit, when we ordered raw cells from EVE back in the day, it cost us about $250 per EV grade cell plus china shipping and tarrifs. We still have a few of those around. Actual edit, well that missed lol

From some private tests I've conducted, at 15F the damage can be as high as 16% SoH after 10 Charge and discharge cycles at 1C/1C. Results vary greatly depending on cell types however with 2%-16% of SoH loss after 10 full cycles. Cold weather rated cells (which the ecoflow most certainly does...

I was peak continual draw the BMS would see, though peak pulsed power is as important. You should watch for both when properly sizing a BMS setup

Sadly I can not peel the whole top of this battery but here is what it looks like under the top of a from the Factory EVE LF304 There is a slight color change, but the qr code is very well defined and perfectly square to match the lid cut out

While a cell of this size probably isn't the most popular format, it is first Sodium Ion Cell Datasheet I have that is shareable. It was translated via google PDF translate before I got ahold of it sadly. Figured this would be enough of a interesting topic to post a whole thread.

Pictures and specs are already up now in post #58 Highstar cells were $26.80 USD FOB, with no direct shipping to the US from Highstar. CY cells were ~75usd ddp to the US via the grey Market. I would bet on them being "grade a cells" because I know roughly how they got sourced.

You have seem to mixed me up with Kate lol, However here's a bit of what I have that I can share. Apologies for not posting the full thing from Highstar. I was also told with these samples that even though they say they can be charged at -20C they should not be. "And if the charging...

It's supposed to be but at least with the Highstar prototypes they warned against charging them cold even if it's in the spec. The CY cells are only rated to -10. There are cold weather LFP cyclindrical cells as well and they kick ass, having tested them. Problem is it's only 26650...

If that is a compressor driviven fridge, chances are that spike is caused by the compressor starting up. At start up they use a large surge current to start up. Then then ramp down quickly to a typical sustained power draw level. This spike can be as high as 13a on 120v power. It is only...