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The finish-ish of a pcb based 14S 80P powerwall
#1
Afternoon all,
Just a pic of the start of my powerwall.
Pcbs are my own design.

lordxenu, Redpacket, Korishan And 7 others like this post
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#2
Modular, flexible, and professional finish.
0,8kWp running
2 kWh battery in Build
Ultra low cost
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#3
Interesting. Do you have anything to connect or support the battery boards on the opposite end of the main board?
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#4
(08-09-2018, 02:28 PM)Cherry67 Wrote: Modular, flexible, and professional finish.

Thanks.

(08-09-2018, 02:37 PM)Mazlem Wrote: Interesting.  Do you have anything to connect or support the battery boards on the opposite end of the main board?

I'm toying with the idea of using some kind of slotted apparatus, but those edge connectors grip well and the pcbs are the same height, so the shelf might just be good enough.
Also, if you need to grab something out quickly, the less in the way, the better.
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#5
Nice work .... looks good.

Is there some kind of cell level fusing ?
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#6
(08-09-2018, 03:35 PM)wim Wrote: Nice work .... looks good.

Is there some kind of cell level fusing ?

Thanks and yes, difficult to see, but there's a fuse wire between the two pads above each cell.
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#7
I see ... you can even put glass fuses instead ... nice  Smile
grumble likes this post
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#8
Looks really nice and interesting cause I don't like the soldering on cells. Most likely due to my handling, I'm quite handy but soldering 18650's doesn't really go well for now.
Have you already been able to test out a full pack ? How is the heat dissipation at the terminals from the cell holders ? I remember Jehugarcia was experimenting with something similar and when he tested the pack under load, the terminals got way too hot.

So hopefully you're design got that sorted out and you're willing to share the PCB layouts ?
I certainly would be interested.
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#9
(08-09-2018, 09:34 PM)yoeri_w Wrote: Looks really nice and interesting cause I don't like the soldering on cells. Most likely due to my handling, I'm quite handy but soldering 18650's doesn't really go well for now.
Have you already been able to test out a full pack ? How is the heat dissipation at the terminals from the cell holders ? I remember Jehugarcia was experimenting with something similar and when he tested the pack under load, the terminals got way too hot.

So hopefully you're design got that sorted out and you're willing to share the PCB layouts ?
I certainly would be interested.

No testing yet, but I'll let you know how it goes.
I saw Jehu's vid, but can't remember how many amps he was pulling.
I run a 48V system, so will spread the load to a minimum.

I'm sure to share if they work well.
Korishan likes this post
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#10
Looks like a well thought out, neat and interesting design.
I hope testing goes well.
grumble likes this post
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