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Paragon PowerWall
#11
I hope you are not planning to use full 5kW from your inverter much?
This would make battery current quite high for 48p packs?
Eg 5kW at approx 3.5V/cell 14s = 5kw/49V = 102A + maybe 15% efficiency loss in inverter = 117.3A
117.3A/48 cells = ~2.44A/cell
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Running off solar, DIY & electronics fan :-)
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#12
What size printer where the baskets made on? On't fit on a Prusa i3mk3s
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#13
(09-06-2020, 03:36 PM)Korishan Wrote: Looking good.  Plus the cleanliness and orderliness is always a plus Big Grin

this is rack for storing tested cells, soon I will start building the first battery, based on 18650 baskets 14s60p something like this, sketched in a CAD program:


 





(09-07-2020, 02:32 AM)Redpacket Wrote: I hope you are not planning to use full 5kW from your inverter much?
This would make battery current quite high for 48p packs?
Eg 5kW at approx 3.5V/cell 14s = 5kw/49V = 102A + maybe 15% efficiency loss in inverter = 117.3A
117.3A/48 cells = ~2.44A/cell

the plans have changed a bit, I am making a slightly larger battery, so 14s60p and such batteries should be 4 modules, I plan 14s60p x 4 = 14s240p




(09-09-2020, 11:06 PM)SLaSH_007_1 Wrote: What size printer where the baskets made on?  On't fit on a Prusa i3mk3s

my printer is Tevo Black Widow, table size 350mmx240mm, I have several designs of such baskets, if you need any specific ones, give info, I will do it for you, no problem Smile

https://www.thingiverse.com/paragon_34/designs

https://www.prusaprinters.org/social/466...gon/prints
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#14
So your final powerwall you want to use 4-cell holders, and individually fuse with replaceable fuses? Sure is the most flexible design but boy that looks like a heck of a lot of work, and not very space efficient.
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#15
(09-10-2020, 06:59 AM)rev0 Wrote: So your final powerwall you want to use 4-cell holders, and individually fuse with replaceable fuses? Sure is the most flexible design but boy that looks like a heck of a lot of work, and not very space efficient.


exactly as you write, I have a lot of space for this project, a separate room, and a 5m long wall at my disposal and I want to use it Smile

you're right a lot of work, but later very easy access to cells and fuses, additionally it is easy to locate damaged cells and quick replacement an additional plus is a very good cooling for cells that are not squeezed into tight packages
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#16
Have you looked at the actual parts you plan to use? I suspect it's going to be really difficult to solder it all together like in the CAD. And if you add gaps for working space, you might need a ladder to access the top rows.
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Modular PowerShelf using 3D printed packs.  60kWh and growing.
https://secondlifestorage.com/showthread.php?tid=6458
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#17
(09-10-2020, 08:08 AM)ajw22 Wrote: Have you looked at the actual parts you plan to use? I suspect it's going to be really difficult to solder it all together like in the CAD. And if you add gaps for working space, you might need a ladder to access the top rows.

Yes, I thought it all over, at least I think so Smile, i will have access to any place without a ladder,  everything will be assembled on an OSB board, only later the whole thing will be hung on the wall as one of four such modules

maybe this weekend I will start to put together something, I will show photos of how I'm doing
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#18
This might be an interesting variation to your design (scroll down a bit) to reduce both cost and space. Perhaps with 2x or 3x18650 cartridges.
https://secondlifestorage.com/showthread.php?tid=6578
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Modular PowerShelf using 3D printed packs.  60kWh and growing.
https://secondlifestorage.com/showthread.php?tid=6458
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#19
(09-10-2020, 11:25 AM)ajw22 Wrote: This might be an interesting variation to your design (scroll down a bit) to reduce both cost and space.  Perhaps with 2x or 3x18650 cartridges.
https://secondlifestorage.com/showthread.php?tid=6578

Great idea thanks for the link, I would prefer, however, that the cells were single, but it is a good idea you can quickly increase the battery capacity, and no need to expand with new handles,

and that's what bothers me one thing, what diameter of these wires between the cells (handles) in my project will be ok, a 15s60p battery, enough copper wire 2.5mm, or two such wires twisted together?

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#20
today i started having fun with building batteries, soldering mass and patience slowly but surely Smile



 

 

 

 

 

 

 

 

 

 

 

 

 

 

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