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FAQ
#21
(10-19-2017, 03:04 PM)Korishan Wrote: You mean like this?

3s4p Battery  (or is that 4s3p?)


More important.... we do have a volunteer who is qualified to make the pretty pictures... Wink

I vote for Korishan, his are the pretty'est Big Grin
daromer likes this post
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#22
I do to. Korishan for the pain-master
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#23
Actually, that was first time using Paint 3D Tongue Surprised it came out that good in a few quick mins (reason why I labeled them wrong in the 1st post)

Wow, just went back and read the last couple hours of replies and there's a lot of confusion. I shall now attempt to make a better larger picto-gram. Here goes.....
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#24
I've done RC stuff as well, I'm very familiar with this sort of thing. However, I still stand by my point that I've NEVER seen yPxS in use. If we do now, no one will understand that the only difference is wiring of the BMS if there is one. That's why no one uses this in the first place.

But since you think this is important and this is a group work, go on and write the explanation for the FAQ Wink
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#25
DOH! I dont wanna write it haha Tongue

Nah i can perhaps write something together about it. I know that i found a decent explanation somewhere hmm Il get back in that point.

Yeah we all need to get together when it comes to this sorta things.
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#26
Ok, here's a rough draft of the 4s3p vs 3p4s


 


Anything I need to change on it?  I'm gonna work on the lines a little better. Kinda difficult to draw 2D lines in 3D program  Rolleyes

Ohh, another reason to make the distinction at some level, is if someone does a series with just Xs1p and the parallels the strings, voltage imbalances could occur especially w/o the bms. If they do the 4s3p method, then the chances of a cell going low or negative voltage is very very slim.
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#27
Whatever you do, do not change the color of the cells any more... (maybe a bit brighter green...) Wink

It is very clear there is a difference .... but i still get confiused why en when to use 4s3p or 3p4s.
In my mind you build packs of xp and you put them in xs, always and put x strings of them in parallel.... so if in your drawing of 4s3p there are packs of 10 cells instead of single cells it would be 3x 4s10p, right?
Shoud this not be an other type ? (remember the poll a while back with system A, B and C)

Maybe it would be better to draw (xp) packs instead of single cells... (we all do kind of make packs)  Big Grin
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10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#28
The first image Korishan did draw is packs. Packs of 4 and 4 you could say.

For instance i build 80p packs. Connect 14 in series. Aka 14s80p.
But then i paralell those strings and currently have
2*14s80p Smile
The Ultimate DIY Solar and build place
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
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#29
(10-19-2017, 08:51 PM)daromer Wrote: The first image Korishan did draw is packs. Packs of 4 and 4 you could say.

For instance i build 80p packs. Connect 14 in series. Aka 14s80p.
But then i paralell those strings and currently have
2*14s80p Smile

You could also say 2p14s80p right? Or is it 14s80p2p? ..... is this stuff confusing? Big Grin
Maybe something like 2p(14s80p)
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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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#30
2p14s80p would be correct, or 2*14s80p. Both shows two strings of 14 packs that are connected in series with each pack having 80 cells in parallel. This is the reason why it makes a difference on the designations.
If it were 80p14s, then there'd be 80 packs that are connected in parallel with each pack having 14 cells (single) connected in series.
Unless it was 80p14s4p, then it'd be 80 packs that are connected in parallel with each pack having 14 strings of 4 cells in parallel connected in series.

There's a madness behind the reasoning. Err. I mean, a method behind the madness Tongue

Perhaps I'll draw up all 4 type of connections so that it a lot more visible. But I'll stick with a 4 pack max for simplicity sake Wink
Proceed with caution. Knowledge is Power! Literally! Cool 
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