LifePo4 battery preparation.

LifePo4 LF280k, torque wrench, EVA foam, batteries, unbox batteries
In this video I unbox the LifePo4 batteries, check the QR code, install the innerscrew. Use the torque wrench to set the right torque of the innerscrew. Once all set batteries are moved towards the frame. All batteries are insulated with extra EVA foam. Compress the cells into the frame.
Spacing between cells, etc
You think it's not needed to compress the cells? Check the video of collegue builder Andy from "offgrid garage": • The Battery Shelf afte... and thank me later.
Tools & parts to complete this step:
EVA foam:
s.click.aliexpress.com/e/_DDX...
amzn.to/3KXPAi0
Torque wrench model 0.3 to 30 nm
s.click.aliexpress.com/e/_DeK...
amzn.to/3zXP0e0
Utility knife:
s.click.aliexpress.com/e/_De5...
Shrink tube for busbar: (18mmà
s.click.aliexpress.com/e/_DFu...
amzn.to/3MJbsin
M6 40mm to compress cells into the frame:
s.click.aliexpress.com/e/_Dlq...
Link to all parts and tools used to built the easypowerwall:
sites.google.com/view/diy-pow...
Link toward QR scanner:
play.google.com/store/apps/de...

[@calbDIYBattery]

Nice to meet you❤

[@easypowerwall]

The pleasure is all mine. See you soon with new content.

[@UnderGod100]

I don't think that the video is too long, it's not something you'll do in a couple of minutes, so I'd rather have to complete explanations and extended steps ;-) Keep it up!

[@Shellyfi]

Nice work, one tip. You should insulate metal parts of all tools when working with batteries. Wrench shaft and extension are pale metal.

[@easypowerwall]

Haven't seen a spark yet, but you're right.....better safe then sorry.

[@defjamsgreen]

( OFF GRID GARAGE ) FAVORITE TOOL .🤗

[@johnturner7060]

Great design Looking forward to see more

[@leah-lithiumionbatterycell24]

Nice video from Frankyy🎉

[@GapWim]

Editing tip: long repetitive seqences (ex: placing all the studs in the batteries) can be a time lapse after one or two real-time examples.

[@easypowerwall]

Dear God....hmmm sounds familiar :-) thanks for your feedback, will take this into account for my next videos. Have a nice day, Franky - Easypowerwall.com

[@offgridd]

nice video although it is not forbidden to smile when you are busy with such a nice project 😃. Next week my 40 LF280K EVE cells arrive to make a 18s2p config, combined with 3 victron multiplus2 5000/48 inverters. Together with a smartsolar 250/100 our house won't even notis a total blackout for weeks😎 Nice touch this EVA foam, I'll be using two end plates pulled together by four spring loaded straps in order to keep the cells on a slight pressure of 150kg. The EVA tape will d3vide the pressure evenly around the internal roll of the kathode.

[@easypowerwall]

Thanks for the flowers on the EVA foam. About smiling on the video, I'll work on that, check the latest post (kzbin.info/www/bejne/o5qbkmqqe6eZpqM), not only intresting but funny end.

[@jaimemontalvo421]

Wow do u have a video of that?

[@walter--]

Thanks for sharing! Regarding the EVA Foam; this looks like a rubberfoam; simular to something like Armaflex. I see here 2 issues; - did you see a spec relating to heat resistance? The average rubberfoam is not very hear resistant (max 110°c?). I would rather use something that has specs relating to heat resistance. For example a silicon mat (up to 220-230`C) or something dedicated for this purpose. - these rubber mats are not dimensional stable under pressure. My experience using rubber mats is that they lose their flexibility when under constant pressure. This would mean that you will have to re-apply pressure to keep the cells under a constant compression.

[@easypowerwall]

Hi Walter. You talk about temperatures of +100°C. Batteries will be around 40°C max, only few degrees above ambient temp. The Eva foam is primarily extra electrical isolation between cells. Hope this answers your question Walter.

[@walter--]

@@easypowerwall An EVE cell can support up to 55°C; if you want to do this is another question ;-). But do you have confirmation the rubber foam supports 40°C for longer period? I don't see any temperature info. Which I would see important in this construction. What do you think about the dimensional stability under pressure over long term?

[@davidchristensen1219]

Interesting. I thought the LF280K cells all had welded studs. I haven't seen any like these before.

[@easypowerwall]

Hi David, The Basen EVE cells come in all flavours. I prefer these over welded studs. Have seen some horror pictures where welded studs went through the package because the shipping company didn't handled the batteries with care. Have a nice day. Franky www.easypowerwall.com

[@JonatanCastro-secondary]

Sorry if I missed it but do you have an estimation of the cost €/Wh considering all materials, BMS, fuses, etc?

[@easypowerwall]

Hi Jonatan, that's a good idea for a short movie. But in short, cost with batteries & inverters is 13500EUR/60KWh or 0,225EUR/wh. Note, I have charger which is not in use and second MPII is not really necessary for now. In that case it's closer to 11500/60KWh or 19ct/wh. Hope this helps.

[@JonatanCastro-secondary]

@@easypowerwall thanks a lot! I was actually asking without inverters, just the battery and whatever it takes to make it work and connect it. The cheapest ready to connect battery I found is the pylon tech and it’s around 0.29€/Wh. Looks like it’s still really worth to do a DIY battery considering all the savings you get!

[@alanblyde8502]

Tip I’ve seen it mentioned on other channels to use the blue lock tight on the studs

[@easypowerwall]

Hi Alan, I'm not a fan of this technique. If you have to unscrew the stud you need to use so much force you will destroy the terminal. It's better to apply the correct torque and check every 6 to 12months if everything is still OK. A quick tour with a IR camera is very helpfull too, will come back later on that topic in a future clip. Have a nice day. Frank www.easypowerwall.com

[@repairman2be250]

Those cells do not experience vibration at all.

[@offgriddreaming5403]

Bad idea not a tip

[@samfish6938]

You can buy rack battery $1500 5.12 kw no building just Slide into rack buy 6 for whole house

[@easypowerwall]

I agree, but there are several reasons why I choose for DIY. System had decent BMS with active balancing iso 30ma, fully serviceable, much cheaper, ... Hey and it's fun and rewarding too.

[@BB-tm7gx]

where are you buying the batteries ?

[@easypowerwall]

www.alibaba.com/product-detail/3-2v-Lifepo4-Battery-EVE-LF280K_1600121609267.html?spm=a2700.7735675.0.0.59c125ea4TXmiW&fbclid=IwAR0mUYOpZ8xxG3EWfTb0rH2i3-t6lvVYekM4AKtpCY78HHQ6WXKccbXiI3k

[@PhilippeCJR]

I had in mind the EVE cells had a "B" lasered over the qr?

[@easypowerwall]

Hi Philippe, I am not aware of this technique/behavior. Maybe other followers can confirm. Thanks for your information. F.

[@dobrzpe]

ok. just sayin' - that battery disconnect is NOT rated for 48v....

[@easypowerwall]

The switch can disconnect 75A @48V, so this should work. In normal condition I will rarely use the switch. It's there for emergency or maintenance. PW is 6 months in use not used it once. When used I try to reduce load to 0A.

[@dobrzpe]

@@easypowerwall i understand... *BUT* it's a "max of 48v" - and 51.2v is a little over. i'm sure it's not a big deal - ESPECIALLY if you don't use it often for it to potentially arc internally. and i know properly rated switches are more expensive... just hopeing to make you aware, my friend!

[@dc1544]

I have 64 cells of Lf 280k EVE cells. Pushing them together is a joke. If they have to blow they will either swell or explode from the top so compression is a joke. waste of time and resources. Biggest thing is cooler temps and good BMS for each pack. Each pack to busbar.

[@emilyanderson3535]

I am watching Offgrid garage and still get confused about this compression stuff. How long do you have your battery working. have you left the gaps between cells? Can you observe any swells right now ?

[@easypowerwall]

The cells are compressed, so they can't swell. Built the battery 6 months ago, it's in working order since a few months. 3 reasons to compress: higher battery life (not that important, 6000 cycles), 2% higher capacity (not that important). For me most important reason is "structural integrity", everything is sitting together, no loose parts/batteries...no stress on the studs...evrything is fixed. Franky

[@easypowerwall]

Hi DC, thanks for your comment. Maybe I mentioned it not correctly during the video, but main reason for compression is structural integrity. All cells are fixed, no stress if someone "hits" the frame....everything is tied together and there's no stress on the studs of the battery or any other hardware from the powerwall. Franky www.easypowerwall.com

[@easypowerwall]

Emily did you saw Andy latest movie? Hope you're convinced compression is the way to go. kzbin.info/www/bejne/b5KoZnaMqrt2bJI

[@emilyanderson3535]

@@easypowerwall Yes I did. Thanks for the reply. Compression is must have Regards.

[@tim62744]

At codes can be faked no problem

[@easypowerwall]

They can, but batteries came from basen EVE. Package was top notch, they don't need to fool customers.

[@tim62744]

Where is link to buy batteries

[@easypowerwall]

@@tim62744 www.alibaba.com/product-detail/3-2v-Lifepo4-Battery-EVE-LF280K_1600121609267.html?spm=a2700.7735675.0.0.59c125ea4TXmiW&fbclid=IwAR0mUYOpZ8xxG3EWfTb0rH2i3-t6lvVYekM4AKtpCY78HHQ6WXKccbXiI3k

[@BB-tm7gx]

where are you buying the batteries ?

[@mguarin912]

I believe AliExpress? I see that mfg there as well as these cells. Big Caution on “who” you buy them from. There are sellers advertising “A” grade new cells but ship used “B” cells. There are also some very good reputable sellers. I am sorry I don’t have the name of the good ones. If I can find the one I have I’ll stop back by.