Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
FAQ
#11
You mean like this?

3s4p Battery  (or is that 4s3p?)

Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
(this chat is not directly affiliated with SecondLifeStorage; VALID email req'd)
Reply
#12
Neither is 3s4p, that much I can tell Big Grin

Do you really think we should differentiate between XsYp and YpXs? Do you want to use this to show whether a battery has been built series first or parallel first? I've never seen YpXs in use.
XsYp has been used for quite some time, especially for setup that were wired in parallel first although the series connection is mentioned first in the notation.

If we want to do this then we have to define which one is which. No matter what we choose, your pictures show the same thing Smile

I guess this is what you want to show?


The first one, 4p3s, is four parallel strings of three cells in series. And the second one is the other way around, it is three cells in series four times paralleled.
It took me 5 minutes or so to find the proper wording, this is really confusing and I think it makes everything even worse since it is almost the same Big Grin
Especially since 3s4p is well established for the left example.

Let's take another example, you know my powerboard. I will use a 7s30p setup but I will take seven modules of 30p and put them in series. Is this 30p7s then because I parallel them first?
Reply
#13
Yeah, I typed it backwards.

The difference between the two makes a huge difference on what kind of bms system you use. In a XsYp configuration, 1 bms can handle the whole thing. In a XpYs system, you a need a separate bms for each series. Or at least a more complicated bms setup.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
(this chat is not directly affiliated with SecondLifeStorage; VALID email req'd)
Reply
#14
Yes, I know, but does it justify an own category? Or am I missing something here? Is it already a thing to differentiate between 3s4p and 4p3s? I think it isn't and we are making stuff up. But I could be wrong, don't know. What I do know is that it might be too late now because XsYp is well established for what we now want to call YpXs.
Reply
#15
Yeap it makes a huge difference actually
For instance i got 14s80p as packs but those could also be represented as 2p14s if we count all those 80p as a single cell Smile (Just to make it more difficult)
or even better they are 2p14s80p (not sure if you can put it that way and i dont think we should get into it either)

Im dis-qualified for paint so i cant draw up images for it Smile

darkraven: Both your images look the same but its hard to say since there is lines missing?

The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#16
Hi All,
To KORISHAN : what is the software you have used for your last battery drawing (yellow cells) ?
Thanks.
Hydroélectric 800W PELTON Générator - 6 x 270W solar Panel
Oct 2017 : 850 cells collected : Test in progress
Reply
#17
They aren't missing, I left them out intentionally as we all know they are there Smile

You've done it the other way round now. The top one should be 3s2p and the bottom one 2p3s. See what I mean? This is confusing and pointless, because while there is a difference it doesn't justify its own category. Also it is very hard to figure out what is what because as a battery it is the same.
Reply
#18
Dark no you read it backwards Smile  For instance i got 14s80p packs. That is 80 cells in paralell and then 14 of those in series Wink

And this is important
Because on a 80p14s you would need 80 BMS runs meanwhile on a 14s80p you need 1 BMS run.

Another example the packs i bought are 4s100p. They have 4 cells to meassure.
100p4s would have been 400cells to meassure. Quite a difference
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#19
Why would you read this backwards? That's what I mean, there is no way to tell which is which. Because it is the same thing. I know that you need to monitor more cells when you do the series connections first. And this is a fact, yes, but it isn't important. This is rather the reason why almost nobody is doing this.
Reply
#20
Its not read backwards and its easy to tell which is which. (Atleast for me)

14s80p measn that you got 14 packs in series that have 80 cells each.
80p14s would read that you got 80 packs in parallell that have 14 cells in series.

For me that have been doing RC packs for big drones and other big things last 10 years almost now that have been a big deal in when for instance buying and building packs.
Quick example: https://hobbyking.com/en_us/multistar-hi...-pack.html
This battery consist of 6 packs in series that each have 2 cells in series. Actually 12*8Ah cells Smile

And yes its quite important on how you hook it up when you want it to be balance charged or run a bms to it. Atleast for me it is.
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply


Who read this thread?
99 User(s) read this thread:
hbpowerwall (11-15-2017, 02:37 AM), daromer (11-20-2017, 07:11 PM), mike (11-30-2017, 03:21 AM), goodnowm (12-26-2017, 09:37 PM), ruby2 (11-20-2017, 08:06 PM), Korishan (11-24-2018, 01:35 PM), Wattsup (12-14-2017, 11:06 AM), Project (10-15-2017, 08:23 PM), jdeadman (11-14-2017, 03:46 PM), camils (10-15-2017, 09:02 PM), wim (11-21-2017, 04:04 PM), frnandu (10-20-2017, 10:12 PM), watts-on (11-20-2017, 11:46 PM), David.Hyatt (11-30-2017, 03:26 PM), Hanssing (11-14-2017, 05:44 AM), Stefaan De Ridder (11-03-2017, 12:44 PM), Chiptosser (12-15-2017, 10:54 PM), SolarWind (12-07-2017, 02:21 AM), Mario Costa (12-16-2017, 03:05 PM), Eric Koshinsky (12-06-2017, 04:54 AM), ivnz (10-21-2017, 02:27 AM), Geek (12-06-2017, 10:50 PM), electricJolt (11-04-2017, 03:12 AM), Rad (11-20-2017, 04:47 PM), Longbush Powerwall (12-26-2017, 10:27 PM), SWEwall (10-16-2017, 07:16 PM), Jon (11-14-2017, 05:48 PM), floydR (11-14-2017, 03:04 AM), DarkRaven (11-20-2017, 07:26 PM), Gerard Achternaam (10-19-2017, 07:02 AM), frenchclem17 (12-22-2017, 03:40 PM), Grumplestiltskin (10-26-2017, 08:42 PM), TimFr (12-10-2017, 07:12 AM), m6yru (10-23-2017, 01:27 AM), emerca (11-14-2017, 11:43 AM), aflecha (11-07-2017, 04:04 PM), Tostaki (10-31-2017, 02:54 PM), howiegrapek (10-19-2017, 04:00 PM), cristof (11-13-2017, 10:24 PM), Oz18650 (10-24-2017, 10:18 PM), accoelho (10-20-2017, 06:26 PM), neurocis (11-21-2017, 12:47 AM), Bryn (11-03-2017, 01:43 PM), shonalex (10-19-2017, 11:36 PM), enit69 (11-04-2017, 12:44 PM), teccs (10-30-2017, 04:21 AM), DaxNagtegaal (10-19-2017, 10:42 PM), Jack Murray (11-10-2017, 03:17 PM), ad8mustanggt (11-21-2017, 02:00 AM), jek10 (11-05-2017, 12:07 AM), oviwan (11-02-2017, 07:41 AM), vladimirvitez (11-14-2017, 12:51 PM), Pavel Razzorenov (11-02-2017, 05:34 PM), AmDD (11-01-2017, 12:50 PM), Chris K (11-01-2017, 10:59 AM), Spkerking (12-06-2017, 09:42 PM), PowerLio (12-01-2017, 09:01 PM), eiri1234 (11-05-2017, 06:09 PM), aoe (11-20-2017, 04:29 PM), ghealy (11-08-2017, 08:26 AM), cubo (01-04-2018, 03:10 PM), Ginger Yang (11-07-2017, 07:20 AM), Iulian Constantin (11-08-2017, 06:13 PM), dseidl (11-11-2017, 04:57 PM), bigblue (11-21-2017, 06:52 AM), Avelino Dysangco (11-13-2017, 01:17 PM), navneetjn (11-21-2017, 04:22 AM), Klommer (11-26-2017, 08:25 PM), sneakyRedPanda (11-19-2017, 06:18 AM), rdh824 (12-01-2017, 08:24 PM), paranco (12-02-2017, 08:30 AM), maunz (12-11-2017, 09:37 PM), Jez O'Hare (03-08-2018, 11:50 PM), taylor166 (12-19-2017, 12:42 AM), scotta42 (12-21-2017, 02:07 AM), drchips (01-04-2018, 11:45 PM), maibineadi (01-10-2018, 07:33 PM), mbrunton (02-04-2018, 09:12 PM), DK100 (04-26-2018, 03:47 PM), Atomic (02-22-2018, 06:50 PM), John Southern (03-27-2018, 12:06 AM), Cravnspd (03-20-2018, 07:21 PM), technickal1 (03-06-2018, 07:40 PM), Matt Barrand (03-17-2018, 08:06 PM), MichelH (04-03-2018, 09:12 AM), johnnytyler (05-23-2018, 11:21 AM), oldserg (06-08-2018, 12:48 PM), CBlack (07-18-2018, 09:50 PM), EP3R-T (06-27-2018, 01:35 PM), neowolf (07-29-2018, 03:30 PM), Troy Hatchard (11-02-2018, 02:02 AM), fmecno (09-06-2018, 10:17 PM), NPNZ (10-23-2018, 07:58 AM), qrp_power (11-24-2018, 01:17 AM), selinofell197 (05-02-2019, 06:13 PM), -lafayette- (12-22-2018, 06:52 PM), intra (08-29-2019, 07:44 AM), Havskum (03-05-2019, 10:30 AM), GeneralDJ (03-18-2019, 10:30 AM)

Forum Jump:


Users browsing this thread: 1 Guest(s)