One could argue they are using the horizontal orientation to reduce the footprint of the vertical case, they wouldn't be able to use those sense lead circuit boards if they set them up on their narrow edges. But perhaps to the detriment of cell life.
I don't think so wether the cell is laid flat horizontally or on edge horizontally the area would be the same I think it's purely down to a lack of knowledge/common sense and bad design and we're not just talking about detrimental to cell life were talking thermal runaway.
Its the same area but I don't think they wouldn't be able to wire them up as easily like they can on their wide sides:
Safety considerations for mounting configurations of LFP cells vary depending on manufacturer. Need to check data sheet to see what they recommend. Most EV grade cells can be mounted horizontal without issue. But you still need to check.
The central wiring channels would have to be placed horizontally, but if what I'm thinking is correct then the practicality of their wiring design is potentially dangerous so who cares about how easy it is for the wires to be run when the whole thing has a higher potential to go up in flames.
Surely prismatic cells are all essentially layers no matter what manufacturer if a whole cathode lacks electrolyte and your trying to charge the thing it's going to short at best or cause thermal runaway at worse.
It is fine to do that, but the cell holders need to fixate the cells nicely or there will be problems. It seems that there is a metal bar under the pcb. Looks fine.
Completely false. You are referring to an old diagram which is outdated and from old manufacturing methods. None of the cathode is going to be dry in new cells. And even if you cycle it in any orientation, it will not short or cause thermal runaway. You are wrong.
Thanks I was starting to freak out some.
Seems so after what Will said I took another look and in new prismatic cells they use a jelly roll(ovoid) shape so the plates are continuous but surely there's other manufacturers who use the old method same as Winston and people aren't necessarily checking about orientation, or even people buying used cells and using Seplos cases.I still think more people should be aware seems a important point.
the Nylon CALB's had the same restrictions, and while I cannot for the life of me remember where I read it, i was pretty sure that the same applied to the aluminum prismatic cells. could be wrong. the biggest issue I see is that everybody is ordering cells from various levels of resellers... who give you data sheets that they have created not ones that the actual factory have created. (yes some do, but many do not) I went with my last order of cells with winston as I could get all fo the data straight from the company that made the cells, not jimmy changs battery wholesale shop on the corner of Chiang Kai-shek & Mao Zedong street.
Think I'll just go back to searching for ess with that orientation in mind then who knows what batteries are supplied with them better to be safe than sorry, it's obviously going to be a while before the electrolyte drops to that level but I'd rather just have a lower output battery than a
diysolarforum.com
Thanks. Yeah, I am planning on hooking up the spare Nissan Leaf battery I just took out of my leaf when I upgraded it to a 30kWh pack a month or so ago. So I have 24kWh just sitting around unused right now. With Dala's battery emulator the cost to benefit ratio is incredible when reusing these EV car batteries. But yes, they're 360-400v battery packs. That's why I'm in search of HV ESS hybrid inverters for this little project. Thanks for pointing it out just in case. There's still so much to learn I'm probably missing a lot more key points still. So it all helps.
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there are purportedly two different "amy's" who supply a lot of cells on the forum the one that seems to have the highest trust rating here would not answer my questions about the safety of the cells terminals when they went to the new styled square with two threaded hole terminals (I think it was called the eve280k v3 or some such name) several members had received cells with bent terminals, so when I questioned her on how they would guarantee no damage to the terminals she ghosted me. that is when i said screw this middle man bogus BS and went straight to Winston. yes I paid a lot more, and in my books I think I got a lot more. (at least in the peace of mind category.)But I'm curious as to your experiences importing stuff from China to Japan. I've been in talks with a few vendors the past two weeks for solar panels, roof mounting hardware, PV cable, MC4 connectors as well as a Solis S6 inverter. One of them being sunpal and the other being sunevo.
But just yesterday I was reading here:
The Sunpal Co. LifePo4 Lithium Battery Scam - My experience and advice
I wanted to share my experience here, mostly for the benefit of others to ensure nobody else goes through the horrible experience I had with Sunpal Power Co., Ltd, Hefei, Anhui, China, a seller I found on the Alibaba platform (see link to supplier profile). If this sounds like one of those "do...
That these outfits are scammers and to be avoided. Sad as they both have the best communicators and prices I've found, but I guess scammers have to be the smoothest talkers with the best prices to lure people the more I think about it... So now I'm in search of validated sources so I don't have a frustrating experience or being completely ripped off.
I've read by another member on here that Luyuan is a trusted source for lifepo4 cells. Is that a good one?
unknown, I bought used panels from a solar farm that was being repaired after earthquake damage (a boulder rolled through the 5 year old farm and took out half of the panels. they were on yahoo auctions about 5 years ago and I bought 20 of the sharp panels from there, the JA panels were from yahoo NOS NIB.
DDU is similiar to CIF which is what I ask for, I would not touch EXW with a ten foot pole.
Solis have both HV and 48V products. Most of us in UK and Europe are using the 48V Solis hybrid inverters. Some US-based members, like @Solar Guppy have the HV version.
The "data sheet says so" Is really a valid reason to not lie your cells the way it says. But this is just one datasheet. @Daddy Tanuki mentioned about manufacturers vs reseller documents. Fair enough, but anyone who has read recent EVE MB30/MB31 datasheets can tell these have been written by a manufacturer. They contain huge amount of detail including drawings of a compression fixture for testing and yet they don't mention anything about cell position.
maybe, and this is just a hypothesis becasue the makers realize that most end users outside of industry purchasers, IE DIY folks, do not bother to put the cells into a fixture to stop expansion. if that cell/case is filled to 80% and then the battery swells from an overcharge or a short, now its no longer 80% of the case filled.... its now say for arguments sake, 65%.... just a thought.
