Outstanding work, friend; my bad luck i am on my second board from china, aliexpress, the first, Neey, 35 euros, was bad, drawing 18 amps steady and trying to melt wires, got refunded after 2 short videos i had to send them, now the second one, from another vendor and each one took 1 week from china to portugal... ( where the courts' INjustice system sucks big time, incompetent and slow, truth be told, lol) ... this module also 16S, 27 euros, does NOTHING, just sits there and draws 1. 32 Amps steady from the battery, on the nr. 1, wire, the minus, black wire, and does NOTHING, even after 5 or 6 hours, all cells are the same, cell 2 at 2.98 and cell 12 at 3.29; now, i will have to open another dispute with aliexpress , likely get refunded again, and do WHAT? order a 3rd one, i guess, my cells are old and i need it; and another week wait; if i get lucky with the 3rd one.... i am a bit of a technician,i repair solar inverters,and yes, my wiring is perfect,1 cell voltage step from pin to pin; that is how it must be checked before connecting the 2 connectors,the 9 pin and the 8 pin ones.
Hey man, I stumbled across your channel while trying to learn a thing or two about batteries for a problem I have, and I was hoping maybe you or one of your knowledgeable viewers could help me out. (Please excuse me if my English isn't perfect.) I have a Shark Wandvac 2.0 vacuum cleaner without a battery. It originally comes with a 14.4-volt Li-Ion battery, but sadly, where I'm from, you can't buy any replacement batteries for it. The vacuum only has two connectors for the battery, so I asked myself if it would be possible to get a simple 4S1P 14.4V battery pack and connect it to the vacuum cleaner. However, none of the batteries I could find have a BMS built in (apparently, these things are quite necessary to prevent issues like blowing up, so I thought it would be better to have one of those). Now my question is: Is it possible to get one of those battery packs and just solder it to the vacuum, and I'll be good to go? Or do I have to fear my vacuum blowing up on me while using or charging it? I sadly don’t know if the original battery has a BMS (is that even possible with only two connectors?). If not, I'd guess that the necessary protection circuits are built into the vacuum itself and the charger? I hope what I typed out is somewhat comprehensible, and I would be really thankful for a response. Thank you so much in advance!
When it comes to Super 8 scanning this feels way better than those Wolverine scanners (and all brands that use the same OEM). Python code and camera sensor can be changed if needed.
Hi Stuart, Great effort you put in and we all enjoy it, thanks! Is there an example available with the combination of passive and active cell balancing? I am currently using the single cell module and understand that I can combine it with the V4.90. Will all cells be automatically addressed?
Max looks overpriced without an ADC. I’d use dsPic33F with up to 32 multiplexed input channels 10/12bits for €4 (with an MCU for free and high resolution PWM if you’d like to use them for an active balancer like a DC/AC full bridge to a multi-coil transformer, or DC/DC single cell charge pump, or for a CCCV charger as a part of a complete solution) rather than Max14921 for €16 without an ADC and MCU, or two LTCs for €32 without an MCU…
@@StuartPittaway That's a mystery. Because 1000Ku AnalogDevices price is $8.72, Digikey 16.46 eur one piece, and 8.40 eur for 1000Ku, Mouser 14.8 eur one piece, and 9.05 eur 1000Ku. How did you get it twice cheaper than AD sells? -)
That’s interesting however 99% of all will take eta3000 (something..), connect a capacitor to it and that’s it ) But that ancient balancer is good for an education purpose.
I really struggle to wrap my mind around what could be going on in your life that is MORE important than the production and distribution of this product. You apparenly don't realize what you have here. In my opinion it is foolish to not dedicate all of your energy to the improvement, production and distribution of this product ASAP everything else takes a backseat
Come on man you know the world needs this product...charge what you need to charge to make profit and dont feel bad...you dont have to justify anything...I dont care about price I want this now but your store is shut down that's no good.... You're witholding your greatness from us....like come on man shopify fees are what's going to stop you from delivering this to the world? JEEZE. The world is fucked
Your results absolutely kick the crap out of anything less than $5,000 - easily. This stuff looks amazing for super 8mm and I've been at this for a quarter century. Well done!
Thank you! I could probably get much better results with some tweaking and a better light source. I just didn't need better quality than what I produced.
Sorry, this store is currently unavailable. That is what the shop link gives me. After three failed attempts to buy something affordable that can fit all my 21700 cells I am looking at building something myself. I want an UPS style function for 217000 that I can control through home assistant.
What happens if you use a 3s pack on it and leave 1 input (B4) off? I want to buy an 8s balancer for my toolbox to periodically connect to different packs as a way to balance packs that have drifted too far for the resistive BMS to correct.But I have 3s,4s,and may come across 8s possibly.
I designed the cabinet using Free cad. Then sent the drawings to a local laser cutting company. They cut and bent the steel sheets and then I assembled
YOU SHOULD MAKE THEM BUILT AND AVAILABLE FOR SALE. :) You would gain some $$ out of it and will help people. Anyway 100mA balancing is a JOKE. it would take months to balance. You should do active balancer or at least 1A passive. better toa void passive as it just a waste of energy.
I did make and sell these but out of stock at the moment. Active balance is definitely the way to go, which is why these can remotely control the balancer board.
Hey Stuart thanks for the update! Glad to see you are still making good progress on this project :) I've had some issues with the all in one board I bought from the web store and was wondering if you could point me towards some troubleshooting options? When wired up to my 7s pack, all cells read the correct voltage, but over time cell 3 starts to slowly drop and cell 4 slowly climbs until it hits the max value of 4.5v. I've checked the voltages on the cells at the all in one board connector when it does this and they still read within acceptable values so I'm guessing there is a hardware issue? I posted about this on form as well, but I haven't seen a response yet
Thank you for pushing the cell limit further, it is helping with a project I'm building. Final cell count when we would be finished will be 224 LFP cells if you ever do another cell count update We are aiming at maxing an 800V inverter (Deye 50k), at 3.57v per cell fully charged (for longevity and additional security)
does the external shunt need a fw upgrade for this soc calculation fix? are the random controller reboots on loosing wifi fixed now in this one or was this only fixed in the experimantal fw 2024-02-06-14-07_experimental_bugfix wifi 276 i have this experimental fw and no reboot issues, dont want to have them again thanks Stuart
@@mosfetkiller3851the soc change is only for the on board current monitor. Can I ask you to test this version with the WiFi problem and see what happens? I don't get those problems so would love somebody to confirm is ok
@@StuartPittaway i can test this firmware and tell you if a problem exist with reboot. but can you update the firmware of the external shunt for de soc calculation please? thanks
@@StuartPittaway i have now running the new fw no reboot on loosing wifi signal for now, i keep testing and wil let you know in a week. can you please update the external shunt firmware for the soc calculation? thanks
You should take a look at meningd code and implement it. I have been using it since november ( 8 months ) without faults. It works flawlesly. There are some improvements to be made. My setup consists of 3 x diy bms in paralel , with high availability turned on , intra can comunication between diy bms , data agregation works like a charm. Please, take a look and implement it.
1 Cycle is charge and discharge, that means you should use a total energy 4,704+4,250=8,954MWh in 4:58 , not from only charge process ? 4750kWh is a Chargne energy, not Total energy...?
Thank you so much for your great work - the newest updates are exactly what my wishes for the project! The BMS doing his job now with my 128 LiFepo4 Cells for over one year now without an single error till now.
PCB's are nit a problem. Maybe we can think about some changes in the component list to switchover to more easily available components? I want to make DiyBMS system for myself so badly!:)
One question: When I update a FW for controller, is it necessary to update FW in modules too? I did not found this at forum, and search there is a bit complicated. Thank You.
@@StuartPittaway Well, it is third update since 2022, that I did, but why I asking: After last update everything seems OK, but modules (4.40), that was not updated, do not balance, at controller web seems, like modules burns energy, but they do not, even red LED do not lit and temperature of modules do not change. So, I suspect, that modules should be updated to same version of FW.
Hello Stuart, congratulations. I want to make a bms for 42 or 44 cells. I don't found where you explain this. But for sure is somewhere. Maybe i have to buy 3 controlers board (3*16= 48) (and then they can "talk"?). Thanks!
That is an excellent explanation of how this balancer works. Thank you very much for taking the time to explain it. I was hoping that the board had some means by which it would shut itself off when the balance was within specification, but that may be wishful thinking. I would like to leave the balancer connected with the BMS, but I was hoping it go to sleep when not needed.
