My EVEs had some bloating until I put them in a restraining fixture and flattened most of it. I think they will be fine.After nearly two months of waiting, my 302 Ah CATL cells showed up today:
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Apparently the CATL are indeed more prone to bloat than the EVE.
did you squeeze them flat all at once, or gradually/stepwise? I've read that they tend to swell more at higher states of charge and that bringing them to a low state of charge may help them to reassume their original shape and allow assemblyMy EVEs had some bloating until I put them in a restraining fixture and flattened most of it. I think they will be fine.
Did they offer to replace or exchange the bloated cells?After nearly two months of waiting, my 302 Ah CATL cells showed up today:
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Apparently the CATL are indeed more prone to bloat than the EVE.
I just used plywood on the ends and threaded rods. I torqued them to about 5 inch lbs at 3.3V then charged them to 3.4V and re torqued to 10 inch lbs. Cycle them a few times and re torque to 10 inch lbs when you get to about 3.4V. They will flatten out some but you will still be able to tell which ones were bloated the most.did you squeeze them flat all at once, or gradually/stepwise? I've read that they tend to swell more at higher states of charge and that bringing them to a low state of charge may help them to reassume their original shape and allow assembly
Did you contact DOCAN to find out what they will do for you?After nearly two months of waiting, my 302 Ah CATL cells showed up today:
View attachment 75633View attachment 75634
Apparently the CATL are indeed more prone to bloat than the EVE.
Just wanted to update the new URL for DONCAN for their US side of the house ... THIS is the URL that you want to use ... 3 months now and we have not had a single issue. Also as many of you have also tested - virtually everyone of their cells tested higher (0-6Ah) higher than the 280 rating. Yes I know that for the first 3-4 complete cycles most batteries always seem to push out more amps but so far - after a few hundred batteries - zero issues with the DONCAN folks at all ...
Still our GO-TO people ...
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Jenny Wu Docan Tech Ev Lf280 3.2v 280ah Lifepo4 Lithium Ion Batteries Houston Stocks From Jenny Wu Lifepo4 200ah 3.2v - Buy 2023 Europe Us Grade A Eve Lifepo4 230ah 3.2v Cell 48v 250ah Prismatic Lithium 200ah Solar Akku Marine Forklift Battery Pack,Lifepo4 Cell 310ah 320ah,Lifepo4 Solar Lithium...www.alibaba.com
I will send you a PM. Thanks.
Mine are for an RV and in side by side testing have only had success with the weld on studs as compared to random failure with screw in (on quality 200ah cells purchased from prior to learning about Jenny Wu / Docan). I do believe the screw in failure is directly related to the number of times you are interacting with the cell bolts. Heliciols helped a lot but after putting in 16 on 8 cells i'm never going through that again. They weld on just work all the time without issue.Are these 280N or 280K models? BTW, I couldn't find any info on which are preferrable on forum search. N models are presumably better as they are later iteration?
The link also lists 304AH model for the same price (see pic). Not clear if they are EVE or CATL.
Jenny, could you clarify?
Thanks.
So are you convinced that laying the calls sideways like that is OK? Can you site any information that supports that idea? I'm not arguing against it, but it isn't what I had come to believe....Best experience ever, picked up at Houston location and could not be happier, 302ah 51.2v awesomeness, THANKYOU AMY, nw upto 1002ah, Joe.
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That is some valuable experience. Loosening and tightening the nuts over and over is likely to cause stud failure. Your cells are also more likely to shift around in your RV than they would sitting on a self in a stationary setting. The aluminum that the studs screw into is soft.Mine are for an RV and in side by side testing have only had success with the weld on studs as compared to random failure with screw in (on quality 200ah cells purchased from prior to learning about Jenny Wu / Docan). I do believe the screw in failure is directly related to the number of times you are interacting with the cell bolts.
I used a helicoil on one terminal after I stripped the threads. Then I started using loctite. I am happy with mine but if I was to buy more cells, I would check into the welded studs.Heliciols helped a lot but after putting in 16 on 8 cells i'm never going through that again. They weld on just work all the time without issue.
During my screw in stud repair I used the products recommended in another users youtube video. 1000 grit sandpaper on the round "puc like pad" along with Deoxit. Again beating a dead horse here - way more time, cost and unpredictable behavior vs. my weld on studs so i am waiting patiently for 16 new LF280K's from the incredible @Jenny WuThere is one issue with loctite or welded studs that I haven't resolved. It is difficult to clean the terminals with the studs in the way. Unclean terminals is a serious problem.
Thanks for the video Ray. Someone recommended the dowel like you have but I had trouble getting the sandpaper to stay on.Hi Ghostwriter-
I think I got to the same place you are. In my last video on the subject, I hit the tops for a few seconds with 400 grit on a nifty little attachment on my drill. I really try to get the effort down to the minimum. I suspect you also use an anticorrosion agent on the aluminum, right? What am I doing that you aren't, other than the reading poetry to the terminals part?
38 here this morning. Still no freeze this year which is kind of scary. Last year's icepocalyppse killed off all the bugs but this is going to make for an armageddon of bugs next year if we don't get some cold weather. Am I really hoping for cold weather?
Anyway, here is what I'm doing now. It gets lots of comments and some of them say I don't go far enough. To me, safety is all about the connections and your torque check every 6 months should be on everybody's list as tedious as it might be. I'm guessing the people that don't change their AC filter won't be bothered to do it though. Cheers