Yes the offer was from Xuba (szxuba.en.alibaba.com) about $84 each plus shipping.Yes, my above comment was about Dongguan Huanhuan. I have only seen two datapoints, but both have been negative.
Is Xuba also offering to sell you 300Ah CATL cells?
CATL is a respected manufacturer who reportedly is supplying LFP cells for Tesla Model 3s made in China. They may be grey market cells that that do not pass the quality expected by Tesla. They could be well suited for energy storage.Yes the offer was from Xuba (szxuba.en.alibaba.com) about $84 each plus shipping.
Earlier you said $84. Is the above a different vendor or a delivered price?price offered so far is $102 per cell.
That was Xuba. Deli green is $102Earlier you said $84. Is the above a different vendor or a delivered price?
CATL has no thread when it comes out from the manufacturer. We need to drill holes. Its holes will be the same as EVE's
That PDF looks somewhat strange to me. As said by @Dzl I haven't seen cells over 280Ah with those dimensions.the two pdf that dongguan Huanhuan sent me.
CTP (Cell to Pack) will never goto Grey Market or be available for folks like us.CATL is a respected manufacturer who reportedly is supplying LFP cells for Tesla Model 3s made in China. They may be grey market cells that that do not pass the quality expected by Tesla. They could be well suited for energy storage.
NOTE
In the space of 6 hours I have done a complete 180 degree turn about these cells if they are being sold by reputable sellers like Xuba and Deligreen.
Did the video show them laser etching and the guy has no eye protection. That’s crazy.Welding for battery cells is usually done in 2 ways:
Spotwelding: can be done DIY, you can get spot welders prebuild or build yourself. They are mainly used to spotweld nickel plated strips to eg 18650 cells
For these bigger cells, a thin nickel strip won't work (unless you're only pulling a few amps), so you have to get to the heavier stuff.
You can drill a hole and tap a M6 thread in it. Assuming they are identical to the EVEs, you should be good to go by drilling 6mm deep, but that remains a risk, unless someone is willing to test how deep they can go before damaging the cell.
Also, since the terminals are aluminium, everything counts. Manually drilling and tapping usually isn't the best way, easy to go slightly off, making the hole a little wider, thus less thread and even higher chances of stripping the threads. Highly would recommended a bench drill (Or whatever that's called in English) to make sure you're drilling exactly straight.
Another option is laser welding. With this you can get any terminal on it, but the equipment is way out of DIY.
Personally, unless the seller is willing to add terminals/studs or make a thread I would skip them.
I assume the process of formation and matching is the same with every manufacturer. Where does CATL send the cells that are not up to the standards of Tesla to put in their packs?CTP (Cell to Pack) will never goto Grey Market or be available for folks like us.
From what I understand, the CTP Packs are recycled into the system if not up to spec. It's not just any ol LFP or standard chemistry. CATL is not very open about much in general terms. It's just info I gleaned from the various tradies & EV sites that I lurk about in.I assume the process of formation and matching is the same with every manufacturer. Where does CATL send the cells that are not up to the standards of Tesla to put in their packs?
I can see lower spec cells going into lighting packs or other ESS uses. It may be a more profitable way for them to recover costs.From what I understand, the CTP Packs are recycled into the system if not up to spec.