16S 'all-in-one' release and installed [DIYBMS]

DIYBMS 16S monitoring board - production ready and installed into home battery.

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16s monitoring board videos

Link to battery build video

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Number 0-9 Cable Markers (150Pcs 1.5mm²)

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[choban]

I thoroughly enjoyed watching all your videos in one sitting. I'm blown away by your talent and dedication. You're truly remarkable!

[rubenfernandez]

Excellent work. I'm testing the all-in-one together with the v4.6 controller and it works very well. I did a test and the integrated current meter also works on the negative side of the battery. This opens the possibility for battery systems with voltages higher than 85V, using a voltage divider.

[wahabhabeeb]

From Nigeria. I have always enjoyed your videos.

[EngineeringNibbles]

Been looking for an affordable one of these for large series strings!

[dittagecoeco]

Awesomeness! Thankyou Stuart, ciao from Italy

[kiwiscanwifi]

grwat one.. would love to see the active balancer built in to your passive plug in board.. save half the cables.

[anthonyevans]

Hi Stuart, great video, as a patreon also, its great to see this development. any idea on the total cost per board Stu, both in just the pcb from jlc and the final build cost? I have 4 of the bms systems running managing batteries in my little circle of friends systems. Id be interested in testing one of these tho. Also, I see a reply of yours about the possibility of you selling them, thats a great idea, altho may I add a word of caution. We bought a diverting device years ago (before the battery storage) called a Robin Emley device, to divert the unused solar into a immersion system. Worked flawlessly. Robin sold them in "kit" form, with very little home assembly required. some less techy folks wanted it fully built, thats where his problem came. As his device was so good, and a hobby type "diy" device like this, it outperformed major seller devices and was 10th of the price. They didnt like this and reported him to trading standards. As a "built device" if selling he had to obtain a CE mark accreditation, something very expensive and time consuming to do, and not worth his investment. So, please bear this in mind, as some BMS manufacturers may see how good your device is, (and it is) and may want to create issues for you as they see you as a threat and taking buisiness away from them. Sold in "kit" form with very little to do at home (even as little as bond a heatsink perhaps) then you do not have to get CE marking accreditation. Loving you work Stu, and thanks for doing it.

[hottractor]

Ha ha, 'a bit of a mess', I'd be happy if mine was that nice looking. :)

[maciejbromberek]

Hi Stuart. thanks for the great work. I have ordered some pcbs from jclpcb. they do not include the connectors. can You send links to the connector types for the all in one. maybe You have also the links where to buy them?

[mototunski]

thank you for your great job, Stuart; is it possible to add an event "any cell balancing" to deactivate an active balancer breaking its the RUN jumper circuit?

[StikDragon]

looks really good, nice work. i'm planning on upgrading from a medium sized lead acid installation to LFP next year and I'm keen to DIY it so your project is of interest to me.

i was thinking that another advantage of your older model with individual boards on each cell is that interconnect resistance shouldn't be an issue, right? this all-in-one solution will see any resistance as an extra voltage on a cell during high load. my use case is probably going to involve a few 70mm^2 40cm cables linking a four separate 4S batteries into one 16S. each of those cables will see maybe 10mV across them under full load and i think the AIO will interpret that temporarily as a higher voltage on those cells. do you have any thoughts?

you said there's a 100mA balance current in this particular model. how did you decide on that value? is there a rule of thumb (eg. "[X]mA per 100Ah of battery") or is it just something that you've worked out empirically? from your real-world testing of this system when a cell (i assume you're using something in the ballpark of 300Ah?) needs to burn off some energy what sort of time is it taking to do so at 100mA? I'm trying to get a feel for if 100mA is sufficient for the 1800Ah battery i'm planning. my gut instinct is "no" but i'm keen to borrow your experience here :) I'm going to use good quality cells, so i don't expect them to need a lot of balancing during use but i also expect this to last for a great many years and it's unclear to me how well matched the cells will stay over time, and i don't want to find that in five years' time there's one cell that's spending 100% of its time balancing and yet still creeping up in voltage.

if i needed a higher balance capability then would it be trivial to replace the load resistors with larger external ones, or will that require changes to other parts of the BMS?


i'm also considering building this as 3 smaller banks each with their own BMS. what support does your solution have for parallel BMS operation? any other considerations?

cheers

[GauteKorsnes]

Hello Stuart!
How does it work when you are using both active and passive balancing at the same time?
And, do you plan on using the relay output of the battery board for activating the active balancer?

Keep it up, this is awesome work!

[andrewbowden]

What is the power consumption of the boards? I was thinking of doing the individual monitors, but the more I think about it, it's likely that this new 16s board uses less.

[christopherstaples]

now that is tempting, is it going to be like other bms's that can only work as 16s or will it allow 12s 13s etc to be used as well ?

[witekgrzegorczyk]

Hello Stuart
Can connect 16x cell monitor with firmawere 4, 9 + 1 pc "all in one" to BMS ?

[fahrimertdincer]

i wonder is there a posibility to change disyn to use 6v cels or 12 v or 24 v cels to create 48v battery whit that you can use your old batterys

[jnsaff]

There was a mention some time of a plan to sell these or a group buy. Has anything come from that?

[willempje]

At 9:03 there is a big resistor in view. Resistors just burn energy into heat (what our planet is dealing with).
Why not try to get excess energy from full cells to cells that can take charge?
My 2 cents for today.

[cgmarch]

Hi Stuart. I know this is offtopic.. maybe you can help
The 500a Victron shunt..is it 0.25% precison? Any markers on it or the documentation? Thank you for all the work you are doing

[chriswykes]

What torque do you tighten your terminals to ?