The vertical EEL Battery DIY Kit. Is it OK for the cells to be stacked?
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- Опубликовано: 29 сен 2024
- I'm building a new battery. Just because I haven't got enough😄
I really like these DIY battery kits as they come with all bits and pieces and are easy to build. Today, we are trying out the #EEL #DIY Standing #Battery Box Kit. It comes with a Seplos BMS with communication ports, flexible busbars, solid castors, some sticky foam, but... no manual!
The built process does not take long, until we have the battery ready setup and charging.
I'm a big fan of these DIY boxes and especially for beginners, they are a fantastic learning experience.
I also ordered 16 of their B-grade EVE LF304Ah cells with the battery box. They look really nice and have a B stamped on the QR code. In one of the next videos, we will test them and see how good or bad they are.
What do you think about stacking batteries like here in this box?
EEL DIY Battery Box Kits come in 3 models: stackable, freestanding with wheels and wall-mount. All information and links are here: off-grid-garag...
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Suppose you can let the battery lie on the back for first few sessions of charge to get the bubbles out?
This still does not guarantee the bubbles are coming out. It's need the compression for that to happen. The layer will expand and squeeze them out but only if compressed.
@@OffGridGarageAustralia Thank you for the feedback and knowlege. Let the videos keep on coming we appreciate and enjoy it!
Is it possible to swap out the BMS to a JK BMS? Is this something you could try to do Andy to show those of us who would really like one but don't want the SEPLOS and already own a JK? Please xx
The JK BMS will fit into these cases and batteries, no problem. It is much smaller but also lacks the communication side of things.
You also won't be able the display at the front or the buttons of course. So only access would be via local BT. So you would end up with all these holes and\or none functional display and PCBs with LEDs...
If you're talking about the new JK BMS, we have to wait and see if it would fit. I know it will be compatible (in size) with the PACE BMS and can also replace the coms ports of the PACE
@OffGridGarageAustralia Thanks Andy your a gem! I will wait and see what happens with EEL in case they decide to upgrade to the JK. My offgrid shipping container house thanks you and so do l xx
@OffGridGarageAustralia: On which port did you place the RJ45? is this also the port to connect multiple EEL Batteries to the Victron Cerbo-S?
Which RJ45 do you mean? The BMS has three RJ45 ports.
One is for the inverter coms and two are for connecting parallel batteries/BMS.
@@OffGridGarageAustralia After watching your RUclips film, I bought 3 Eel battery boxes.
In the manual, there is no way to tell which port is for what. I now understand from your answer that the can is for the connection to the inverter. Then the other 2, RS485, is for the parallel connection between all EEL battery's. Is what I am writing correct?
After watching the film "Quality batteries from EEL? Testing the EVE LF304 B-Grade cells." I saw that you use the connection of RS548 for communication.
Or was this just to connect it to the laptop. So which one would you use for connection to Victron's Cerbo-S?
In the manual on page 16 you can see the setup for de can bus dip address.
I believe each box has to be set up this way for them to work together.
@@karelkareltje6036
Yes, you are correct with the RJ45 ports
To connect to the Cerbo GX you will need the Victron Type A cable and connect it to the left port of the BMS marked as RS485/CAN.
Id you have only one BMS/battery, leave all DIP switches off.
Plenty of videos on my channel showing the Seplos BMS and Cerbo connection in all details. In fact, there is a whole playlist about this: ruclips.net/p/PLPomydD54sgC9MpkFBHniAWLa1e3S27LG
3ter 😊 Schöne Grüße aus Ostfriesland
🥉fuer den Holger aus Ostfriesland
Hello Sir, Greetings from Turkey, I would like to tell you a little about myself. I am a man who was born without two arms. I want to buy an electric car, but the batteries of the electric car I bought are gel batteries and I do not have the money to make a lifePo 4 battery to replace those batteries. Can you help or sponsor me in this regard? 72 volts I need a 200 amp Life PO4 battery. If I give my address, can you send it?
FIRST!!!
I don‘t think so…
@@andreasvolk6657why's that?
🥇
Not only excellent content....but also excellent video editing . 👍🏼
Thanks a lot!
Yestarday I woke up in the middle of night and heard your music playing in my head.. Thanks for the videos :) Well, of course the beautiful white box will be full of black finger prints in a while.
Interesting, I got basically the same case (the horizontal version) and grade A 304ah cells. I was barely able to even fit them in the case (with the epoxy sheets in between) and got a good compression with the end plate. Using even just one foam pad would prevent me from attaching the end
Btw they have their own RUclips channel with how to videos :)
That’s how I figured out how to put everything together
Seplos supplied longer screws for the compression plate and all cells have EVA tape in between to smooth out curves and little swelling.
Yeah, I know they have these videos but a link in form of a QR code would have been nice...
I have installed LFP cells sideways (not flat but sitting on the narrow edge) in a motorcycle conversion. After 2 years I found several cells leaking at the poles causing serious corrosion. I guess placing them upright would have prevented that. The other thing is when compressing them with 300Kg (not in this case) you want possible air bubbles to travel to the top. This would be compromised by laying them horizontally. Therefore a No No from me.
Thanks for sharing.
Andy this is a nice build and after your digging for information. This makes your video a starting point for the build and where to find the information ℹ️ thanks ☺️
Indeed. But ggl starts offering such awesome pro videos after you “not interest” tens of Asian amateur “trash”. And no search works either. You have to pay ggl with viewing some bs until it put this video into “recommended”
Compression is not about battery life for me, but reducing stress on cell terminals, which will not be important with those bus bars. Looks like a NICE kit to me.
Same. The bus bars are really nice.
I think brackets must be strong enough to let a safety valve do its job, and just resist to expanding a cell.
You need to be really careful when using a full metal spanner when tightening the positive posts (need to get a insulated covered spanner)
Why is that mate? The power was turned off at the time...
@@OffGridGarageAustralia it is always turned off until it wasn't, best to just be safe then have a massive ark or/and very hot spanner (bms/mcb on most of your battery packs should trip first but still a risk of bms/inverter or charge controller damage in short conditions especially with DC )
the DC cables was clearly powered here in this video as you was using a resistor to charge up the capacitors so it didn't spark when you put the cable on the post
I love your videos by the way
Andy if you worry about bubbles not coming out the first few cycles and no compression then put it on its back as you are going to do (dis)charge tests anyway.
That's what i would do and you have a crane to ease things.
I'm not too worried about the bubbles and it's a good long term test...
Hi Andy! Thank you for a great series of videos, very useful and explanatory. What about the 2 BMS cables at the bottom of the cage? Did you just mount them, waiting to see what was happening when switched on? Viele Grüsse aus Dänemark!
Hello Andy, which box is the best with battery compression ? What is your opinion, vertical or horizontal is better for the battery ? Do u have JKESS Battery box ?
correct me if i'm wrong but it sure seems like all these DIY kits are using the all the same guts inside (BMS, cables, bus bars, displays, comm port module) and just making their own case designs (barely, in some cases.) While i'm still on the fence of this (what should really be called) semi-DIY setups, one aspect I just realized is, it'll be a heck of a lot easier and safer to hang empty cases on the wall and load the batteries into them, then trying to lift the loaded cases into place.
In latest model EEL made two good modifications. There is a cover on top of case you can access top compartment to change fuse etc. Also there is a holder for NEEY ballancer
p.s. printed manual included!
Sad to say, EEL is gaining a reputation for NOT standing behind their products. The measure of a company is how they handle problems. And right now it looks like EEL is failing miserably. After initial back & forth "Howard" goes silent.
One customer posted photos of a 4-cell unit that had obvious crush problems on one end, with a battery bolt pushing into the closest cell and the fuse broken. The top was not bolted down at the factory, which might have added structural support. After a bunch of tests and rigmarole they offered 28 screws to bolt the top down - assuming the customer can straighten out the sheet metal. The customer will have to replace his own damn fuse, and they have stopped communicating. With the cell damaged he's not willing to risk it and he now basically has a boat anchor.
Another customer had much the same issue - the front end (where the battery connections are made) bashed in while the outside of the box looks fine. EEL did send a new fuse in that case and the cell was not visibly damaged.
These are just two from a small Hymer van FB group. Others in the group have had no problem with EEL batteries they added. Caveat Emptor.
Try rubbing a permanent marker over the QR code, then wipe off excess, then rescan
I think side batteries will be ok, gravity doesn’t affect the flow of electrons.
EVE has emphasized that this is not the proper storage for their battery in 2024 again.
They warn to do it so cause cycles are no longer under warranty and the burst valves are no longer working and can go up in case of an emergency.
They have replied to a mail and they are clearly warning which means in case of anything going wrong your insurance will not pay. the terminals have to be on top. Nothing else.
We have gotten one before this mail arrived us so right now this whole battery case is laying on the back on a shelf. Sad but true
Thank I have been looking at these vertical cases I have been tending towards the Seplos version with the terminals at the back. I am really interested in seeing the difference with the EEL
I have one of the Seplos vertical cases and it was nicer to build then the one Andy has in this video, the top comes off making fitting the BMS much easier. In service for 80 days now, no issues other then the normal low power balancer. Lots of space to it a neeeey active balancer which was the way I went.
We will have a look at the Seplos Vertical Box soon. Got it already here...
I have the Seplos Mason 280-L and i like it very much. Its exactly as your other Mason box only vertical. I ordered 10pcs including LF280K to resell here in the Netherlands.
i started watching your videos to learn something new but now i am addicted 😅
Super Lifepo4 👍😊
ahhhhh new video!!! I just found out that there is a new eel version with round corners and here you are
Really? Is that a new design???
@@OffGridGarageAustralia The EEL round corners horizontal box is, at first i thought this was it
Hello Andi!
I'd be very curious about the performance of the grade B EVE cells. How long can they supply a current of 150...200A? How do the individual cell voltages change during such a heavy load test?
I have tested B-grade cells vs automotive certified cells here in this video with 200A. No difference: ruclips.net/video/6PyANZWtKnY/видео.html
Very nice video and edit! By the way, I already build 6x of them and I they have now an manual inside and 16x of that foam. My advice is, do not put the foam on the cells, put it on the isolation pads, but only the half of them. Then you are very flexible where to put them and change it if needed. 👍
By the way, you can make some kind of compression with that metal bars, I press the upper plate with some ratchet strap down to the wheels on each side and then screw on the upper plate in the back and metal bars in the front. Then the upper cells are also well compressed against the other. 👍
It would be great to have isolationg switch in the battery.
Hello! I live in France. I ordered 3 x 280a battery kits like your one.
I told EEL ( Stella) that i want exactly the same batteries as yours with double nuts.
Thanks a lot for your videos very helpfull 👍
bienvenue dans le club j'ai fais de même les batteries arrivent cette semaine mais j'ai apporté quelque modification grâce à lemoult'e batterie et moi même
bonne contruction et merci andy pour cette multitude d'information
sg
Aujourd'hui 32 KWh en 2 boitiers tout installé prêt à l'emploi en 48V 320 AH 200A bms pour 3750 euros frais de port inclus (china)
*JK-PB2A16S2OPX4.3 include bms module? Where are this bluetooth module? On the bms board or hub board or under the display?*
On the BMS board.
Hi Andy ,and thaks again for this video!👍 EEL battery pack vertical model,Interesting...
and about your:"What do you think about stacking batteries like here in this box?"
I am particularly interested in knowing if there is really a difference in the functioning of the cells? their longevity? to the different parameters due to this position of the cells??
The manufacturers don't really communicate about this? But I think that certainly this position of the cells can perhaps have a slight difference in their functioning?? interesting...😉
Official statement from EVE:
EVE recommends either upright or flat but not sideways. Read comment #74 here with the official reply from EVE:
diysolarforum.com/threads/eve-280-cells-should-these-be-clamped-tight-or-spaced-for-expansion.7892/post-94866
Hallo zusammen.
Hätte eine Frage. Vielleicht kann mir einer weiterhelfen.
Wenn ich 2 oder 3 EEl 48 V3 Batterien zusammen schalten will. wie müssen die Kleinen Dip Schalter stellen... und was für eine Batterie ist die Master.. Danke für die Hilfe. LG Harry
Andy, at 12:10, I question the instruction advice not to use EVA foam between the cells, does that mean no insulating plates at all, no EVA or epoxy? That seems a big NO-NO to me as the only thing preventing the metal cases of the cells shorting together would be the thin shrink wrap, and a short between cells could spell disaster right?
Use the EVA or epoxy boards depending on the fatness of your cells.
Andy used epoxy sheets where he didn't use the foam.
@@CollinBaillie Thanks, I saw he had something between the cells but was not sure if it was EVA or Epoxy glass. How important is the EVA foam in stationary applications, and how important is it if you are compressing the cells?
My point was more about the instructions, as it might lead people not to use any insulating material between and around the cells. Something that I've see other people do at their own peril.
My preference might be to use both and if only one, the epoxy-glass sheets as it would be more temperature resistant and offer more short-circuit protection.
@@jackoneil3933 It's a very good point.
Thinking about it, the foam basically offers a way to fill space, which is compressible. The FR4 sheet doesn't offer the compression.
You raise a point of stationary or mobile. I guess this considers movement or vibration, and the two different installations would experience this to varying levels.
I see your mobile/stationery installation and raise your with a heating/cooling expansion and contraction. Also a form of movement. Would EVA foam or FR4 sheeting be better here?
Personal opinion would be to use the rigid FR4 sheeting on the outside faces of the cells to protect from puncture by external objects (including the metal case itself in which the cells are placed) and EVA foam between cells.
Of course with the static, pre-defined dimensions of the case, you're limited if your cells take up enough space that EVA foam (even the 1mm thin stuff) just won't fit. If you're making a raw pack and say wrapping it with fibre tape and some whole-of-pack shrinkwrap, you can build it how you want.
Another consideration: Does the EVA foam act more like an insulator than the FR4 sheets? Will your pack retain heat longer using a porous foam vs a solid sheeting?
It makes for some careful consideration.
All that said, the EVA foam is probably mainly to fill the gaps when your cells just aren't dimensioned large enough for the case to hold them all together tightly. Using just FR4 sheeting is perfectly acceptable if they are already a "tight" fit without the foam.
The instructions are not great. Not as detailed as Seplos has done them.
I've explained the cell installation and isolation at 12:40
Great ❤ i love your effort
Thank you.
This is Miya from EEL Battery~Feel free to consult me at any time
Great Video. I am in the process of designing my own battery enclosure for LF280K cells and wanted to go vertical. But after seeing your video, I think it would be batter to do a horizontal instead. Thanks for the video.
Thanks for the feedback. It all depends on the space you have and if you want to compress the cells or not.
Hi, Gruß aus Deutschland. Du hast doch laut deiner Videos gute Beziehungen zu den Batterie BMS Herstellern.
Ist es nicht möglich etwas zu programmieren so eine art Reset Knopf der anhand der Zellspannung das SOC kalibriert. Oder anhand der Gesamtspannung des Packs.
"I like batteries on wheels" = Tesla I guess?
As well... but also these batteries in my garage. Super handy and less regulations ;)
Hey. You should test new Seplos batterys with their build in inverter. Produckt looks intseting but is it good and realible thats the question.
link?
18:10 20A resistor on the BMS?
Yeah for balancing I think
Wow 20A passive balancer.... ;-)
Good to warm up your coffe ☕ 😂
Hi Andi, can you provide the BMS model? Only the 10e v16 can be found online, with integrated ports. the ELL vertical case features BMS and separate communication ports, can you indicate some details?
Yes, that is the Seplos 48200 10E V16 in the EEL box.
@@OffGridGarageAustralia but can you buy it only from EEL BATTERY? I haven't found another seller online with a similar product. All V16 BMS are with communication ports integrated on the mainboard.
Did I see an ICE lawn mower?;)
There is a newer version of this kit which has the 5a capacitor balancer or the 4a neeyy active balancer
I thought these are the older versions with the balancer built-in and the new ones don't have this any more...
There is nothing about the balancers on their website any more.
Thnak you, Andy, for the video. After watching it, I ordered one DYI box to accomodate my 302 Ah batteries. It look approximately two months to arrive from China to the USA. The box I received was slightly different with all the components displayed at the top. The installation was a bit hard due to flexible link not being exactly aligned but the biggest surprised was after I tried to connect the cables from the PCBs to the BMS. When the cable was plugged in, I could smell something burnt. When the BMS was energized it was displaying only 8 cells and giving an error message that the temperature sensors are sowing incorrectly. I went through the connector pin location and found that the connector on one PCB was soldered in reverse (so much for QA/QC). After contacting EEL support, I was promised replacement PCBs and the set arrived approximately two weeks later. After the PCBs were changed the BMS started to show all the cells and all seems to be working fine except the temperature reading, which also displayed warning message. Contacting EEL support about this issue was without too much trackinion and I decided to purchase replacement BMS. After installation of the new BMD, all works as supposed. ELL is not taking responsibility for fried BMS (I suspect the temperature sensing circuits were friede to volatge going to these circuitdue caused by incorrect installed connector) to the poor quality of their QA/QC program.
Boa tarde meu jovem! Que maravilha o seu sistema, eh muita energia para ser consumida, meus parabéns.🎉
Very interesting Andy. Love it. I stumbled on your site and channel while researching a 12v build for my overland Ute I’m building. My question is, do you do or know if someone that does ‘build your own’ lithium batteries/system for off road use? Especially the vibration and dust issues associated with them. I’m looking at a 150-200amh system. Thanks appreciate it.
5:37 I know for sure i know nothing about . But the prices, oh the prices. I would have never even thought about making my own battery. Until i came across nkon site preorder for eve 304AH for 83,95€ with VAT when ordered 16 pcs. So thats what i did. 1454 € with transport and VAT. A grade and ordered from eve. I quess the battery prices are whatever they make them to be.
nice video as usual, could you share all your bms setings 1-86 ty
For the Seplos BMS? Coming up soon...
Andy , They did not send you the instructions because they knew you were a guru at putting them together! lol .will be nice if they change to the Jk BMS Tho.😃 The 304ah cells are cheap right now at QSO .I just put an order in for some. .would be worth looking into for these units.
Yeah, OK, I need 16 more cells for the Seplos box I still have here...
You could test it on your 2.0 set up? As i was thinking of doing it on my set up to see how it reacts against the other banks.🤔@@OffGridGarageAustralia
1880 euro inc VAT for 16 cell LF304 B grade with single M6 in the Netherlands.
I think 2000 for LF304 A grade, but with double connector like in this video, and I could not find an easy way to order a battery box for that, or even add on cables.
I have tested my batteries to be around 1010Wh.
Instead of using a resistor to precharge capacitors, I use 2 x 24V incandescent globe is series. I had to precharge a 48V 11kW inverter, and this was the easiest method (globes easy to source close by compared to a resistor) that I found on line.
Great tip, thank you.
You can use DC cutter between inverter and battery
Very good 👍
Seeing as all the cells are free to begin with, why not connect them all in parallel and top balance them to 3.xx voltage you want instead of in series and dealing with balancers and dealing with cell overvolt protections, balancers etc before installing it?
We will see the impact of *not* top balancing cells that are almost a year old before assembly, as another thing Andy is testing, they will be top-balanced afterwards - the resulting capacity difference may be minimal (2-5Ah perhaps), as suggested by previous builds. The extreme majority of fully assembled battery packs sold do not top-balance them before shipment, and those packs work just fine.
As explained, it's always a bit of a test with such cells. The seller claims, they are all matched, so balancing them before assembling should not be necessary...
@@stefanvanzyl9090 Ok, makes sense. :)
will we hear something about NEEEEY for this set ??
I have seen the NEEY on the EEL website. Not any more though...
Andy did they give you any time frame for change over to jk bms. Please keep us informed as was about to drop money on 2x jk but may wait till eel start putting them in box.
I ordered the EEL box without bms. They gave me a good discount for that. Ordered the JK separately.
I think i need to make some changes to the communication holes on the eel box
Yes, the JK has a different communication board and maybe mounting holes for the BMS PCB itself.
It is size-compatible with the PACE but not the Seplos BMS.
Yeah, get the boxes without the BMS as mentioned here if this is an option...
This may sound stupid but why cant u link batteries up to 240 v and not have an inverter
You need AC, but batteries deliver DC.The only way to get AC from DC is by inverter, no matter how high the voltages are.
240V DC will be fatal and is definitely not a DIY task any more. Super dangerous!
Hi Andy first of all thanks for all your videos you help a lot, let me share my experience with my EEL box they send the pcbs that have the links to take the voltages of the cells to the BMS with the wrong female connectors, I talk with them and the solution was that I had to cut the connector to have a perfect fit... this I know... and they refuse to send me a correct part... I will never buy nothing from them... chinese... they are fantastic... with their faults... with our faults they are more active... but with their faults... very relaxed, Thanks to let us share our experiences, all the best!
That double cabe from the BMS to Negative 9 and positive 8 I believe (there won't be a voltage difference on the same busbar) is a Seplos thing isn't it? Its like a 16s seplos BMS are two 8ses combined internally.
Hi Andy, I really enjoy watching you videos 👍 much better that TV . Could you please tell me how long that battery would run a 1kw load at 230 volts AC please , or how to do the Maths calculation or formula to do that . I understand 14.5kwh of the battery but not what you will get out of it after going through the inverter to power a 1kw load . Thanks
Andy love your videos, I'm guessing 33:05 is the Seplos Mason 280L? Any hints as to when you will be releasing your review on this?
Great video again! The new EEL DIY kit already has the Neey balancer included. That is to be considered.
It's not on their website though. I have seen their offer with the NEEY but thought, it was a limited offer and they don't do this any more...
I have understood that the batteries are not supposed to be squeeze with 300kg force, but the ends are tightened "tightly" to cells and the ends must withstand a force of 300kg, the force produced by of the cells.
Hello, been a subscriber for a while, and love your videos. So it's been 2 months, what is your assessment of placing the batteries on their side? I have a pending project where this would solve some space in a remote well pump setup. Your thoughts??
My method of madness to get all the foam pads in. Got the flat laying V4 box for the decent compression plate. But stacked the cells with the case upright. First all the plastic plates and some foam pads. Screes in and compress itnsome. Than remove the plate and add some more foam pads. Until all foam pads and plastic plates are in and compression plate sat snugly where it was supposed to sit. Plate is straight and no excessive forces in the process.
Also found how to build video from eel that had the temperature sensors screwed in with the balancer cables. Don't look ok to leave them flapping in the breeze.
Yeah those terminals. lol
Very well done - being the guinea pig - the manufacturers owe you a free set of 3 batteries.....i think.
6:15 i have 2 Shoto rack batteries which placed face up, and i believe batteries are lied down as well for couple months now. I hope they will be fine.
One would assume that the whole point of this particular case is to be mobile hence the casters on the bottom. But if you do want to lock it into a wall then just put some ratchet straps crossed it which are secure to the wall behind it 😂❤
I wonder why you did not top balanced this cells before buiding the battery?
I explained it in the video, I think.
The seller matches the cells, right, so why do you need to top balance?
@@OffGridGarageAustralia I did not know that in Australia "B" grade cells are shipped matched. But I would balanced them before connecting them in series as magazine regardless.
Andy, you've got almost every possible style and type of battery, which is great and gives us a lot of valuable information and comparisons (as well as the different BMSs).
Probably the only type of battery you haven't tested are DIY PCB batteries, where the whole battery pack is connected together with just one (or two) large PCB board(s), in which all the busbars and all the balance cables are integrated. This kind of PCB to build battery packs has Taranis Energy for standard cells or jehugarcia for its 74Ah cells . What do you think about this kind of PCB for battery packs?
Heard about them but never seen one for sale anywhere. Is this a thing for DIY batteries?
I'll look into it...
@@OffGridGarageAustralia Yes it's for DIY battery building and yes it's on sale.
Which do you like better, EEL or Apexium
Disadvantage of vertical stacking is that there might be electrons leaking out I think.
The electrons all pile up in the bottom battery
@@wallacegrommet9343 YES! Indeed!!
Ah... it has this tray underneath the battery stacks. Is that what it is for? I was wondering what this weird looking pump and cable is for which leads back to the top cell...
so you lay it flat for the first month and then the gas bubbles should be out. that solves the no compression thing
Good video. I like when you mentioned other brand and zoomed into the box. "Seplos"
Yeah, still got this sitting here and waiting for more batteries to come in so we can build it!
Hey Andy, looking forward for the build of the Seplos Box 🙂 Any plan when you will do this 🙂?@@OffGridGarageAustralia
That is exactly the case I am trying to get, funny to see you doing a review on it as I’m looking at it but it cost too much for me.
You're not in AU by any chance?
@@OffGridGarageAustralia No I live in Canada, about $400 for shipping to Canada, I enjoy your video content Andy.
@@frostyfroze7352 That's a bit too far. Otherwise I would have shipped it to you.
Andy look into the battery's from ufo you gonna like it
I saw them. Can't really tell what the difference is though.
@OffGridGarageAustralia good battery and good price and touch screen
you have bubble batteries , i have Lithium Batteries 🤣
I paid 1888 USD for grade A brand new batteries from qishou and you paid this for grade B? Its expensive.
you did not listen. he bought the material 6 months before. prices are coming down rapidly. furthermore i would never trust dealers there. i buy only eve cells from a trustworthy dealer. if you got the same eve cells at this price (a-grade) for this price then its a good deal.
Heya, those diy bild kitt's looks very nice indeed and they work pretty good too
Batteries should never be mounted / placed / setup, unless the manufacturing specs specifically state they can be mounted a certain way. Why: because a fire can kill you.
As I said, they can be mounted in all directions but upside down.
And, what fire?
Padrão
While the EEL battery does not compress the cells, the cells have little room to EXPAND. Is this enough??
The expansion force will be a lot higher than the clamp force of the top plate. It's not a proper compression, more of a fixture.
Guten Morgen Andy. So, I guess my question would be..... What do yo do when you need to daisy chain them? This means having to run A bus bar system because you can not use different lengths of cables as this leads to heavy and unstable back EMF or Eddy currents I think is the more accurate term, inside the cables.... That will also mean a lot of noise on your DC system under heavy loads....
Well, I'm not sure about these cable lengths, but I'm using all these test batteries with a variation of daisy-chaining, different capacities, aluminium bus bars, different cables sizes and lengths and had no, really no trouble at all. I have run over 6000 watts from these systems with no problem ever while charging/discharging.
Yes, some batteries will charge faster/slower than others but with LiFePO4, it is not a problem.
I'll show this in one of the next videos...
Love all your videos, but this build seems to be missing some things. No circuit breaker? no T-class fuse? and where did that ANL fuse go? did I miss that?
You missed the fuse I showed and installed. Circuit breaker can be an option but with a fuse, not necessary.
I just have thought that the cell at the bottom will have a different compression compared to the top one due to the weight of the cell on top of it. Will prowse on once open a leaking cell with this configuration. So i thought, that not a good idea to stack cell on top of each other compared to flat on the floor where each cell have the same compression.
Additionally with 280/ 304ah which around 6 kg each. Cant imagine how stress gonna be for the bottom cell to have 48/50kg weight on it.
As I explained in the video, if compressed with 300kgf, the additional wait of the batteries is negligible for the bottom cell.
Can't wait! It looks like fun but NRTL Listing is a thing in the US.
Is the EEL D.I.Y battery box ,specific size for the 304ah cells or can small AH cells be used ?
They have this size that takes the 280-320ah type size cells and they also have a box for the 230ah cells.
280Ah and 304Ah have the same cell size. The 230Ah cells are smaller...
Looking at you batteries - you must be power independent for something between 200 and 300 years 😜
If they would be all connected, yes, for a lifetime 😄
Where are the Aliexpress links for the On/off switch and connector to the 10/E BMS ?
Added now, sorry.
I have heard on a german youtube channel that it doesn't matter how the position is of the batteries accept upside down. My Seplos Mason 48V DIY kit battery is facing upwards. I reinforced the backside (now bottom) with plywood. Made a frame with rollers.
That is the information I have as well.
Your night shift workers must be on strike!
Would it make any sense to lay the case on its back for the first few charging cycles; to allow the bubbles to escape despite the lack of compression?
Am I missing an inside joke about allowing bubbles to escape from the batteries?
I thought the swelling was inside a sealed case, no gas ingress or egress.
I have knowingly (not from EEL) received B cells with potential swelling. They appear to have been shipped by sea with the boxes on end. All cells with swelling were on the same side in each box. They are supposed to be shipped terminals up for that reason. Like the one comment said, do tests with it lying down, after a few cycles , swelling if any should be done.
Never seen any documentation from EVE in what orientation the cells should be shipped.
Once they are swollen, it will never go away again.
Nice yes l have two 5kw rack battery installed standing on end ,as that's all the space I have in box being only 300mm depth fit 2 x 147mm height in space
Yeah, the floor space requirement is certainly a benefit of these vertical batteries.
MUST BE NICE TO BUY 2700 DOLLARS FOR BATTERIES AND JUST LET THEM SIT IN THE CORNER FOR 7 MONTHS. WTF ???
Why are you shouting? Keyboard fckd?
Question on jk bms . I got one just today but it will turn on for only about 10 seconds then shut down . All cells are about 3.3 volts
Any error messages while it's on? Check the resistance as well and make sure you haven't got a short or so. Could be a cabling issue but hard to tell...
Hi Andi, hi All, I am just in the process of assembling the horizontal (black) EEL boxes with 280Ah grade B cells. I love the assembly. My cases came with enough foam sheets for all cells. Maybe the 280Ah cells are just this much narrower than the 304Ah cells? I had to use my largest screw clamps (and some wood pads) to compress the front plate to the cells to reach the threads with the silver screws. And slowly one by one the screws all went to fully tight. Whatever slight bulges there were, they are now gone. Thus (I believe) the optimum form factor is achieved for the initial charge. One thing to the bus bars: The orange insulation is too long on all bus bars on one side (the other side from the little screw hole for the BMS connection). In my situation, if I attached the bus bars to the terminals just like this, one side would not get the full contact area on the terminal. Therefore I cut the orange material back just a cm or so. I think, this is quite important to prevent overheating due to bad contacts.
Now I am very curious about the commissioning, especially the top balancing. 😊
The 280Ah cells have the exact same dimensions as the 304Ah cells, no difference! The stackable box has a different design and comes with proper compression option.
The bulging never goes away again, no matter how hard you would compress them. The EVA tape just compensates for the uneven surface of the cells.
Shame that this DIY box has just one terminals, the others have two, which is better for connecting multiple batteries in parallel. Probably in a short time there will be a comparison with Seplos vertical DIY battery box :).
Otherwise, I like this and the other DIY boxes. The rounded corners are nicer, but harder to replace with the new DIY modified ones. DIY boxes with sharp corners have the advantage of being easier to DIY modify - for example, replacing a simple front sheet with a new laser-cut one for some other better BMS ...
Yes, good point, I forgot to mention that it has only one pair of terminals. The rounded corners are also more expensive to manufacture, I would expect. At the end, it's a battery case which sits in the corner... so colour, and finish is not important.
Yeah, I'm keen to see the Seplos vertical box now ;)
Maybe the design is made for single use. Cables on two sides and the display on the third one. Not easy to put some cases together...
Yeah, that is something I don't like with their design. Having everything on one side makes the case wider due to the larger recess next to the batteries. Here, everything is above the actual cells...
Soo nice and clean.
Are there any boxes for 18s?