Automatic Active Balancer - The Evolution in Balancing. But...
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- เผยแพร่เมื่อ 20 ก.ย. 2024
- I today's video, I'm going to test the fully automatic active balancer from Heltec...Well, this is, again, a slightly modified and customised hardware, especially made for 12V batteries, so it is only available in a 4s configuration.
Tha balancer has a hard-coded turn-on voltage of 3.40-3.43V and a turn off voltage of 3.3V. I'm testing both thresholds and see how the balancer works during charging and discharging.
Even the trigger voltage is not as precise, the balancer seems to be working well and balances the 100Ah test battery fast.
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Hey guys, I neglected to tell Andy that I do actually have LOTS of 8S versions of these, and I have a couple of 16S ones available (more can be ordered). Get in touch with me to enquire about them.
As we discussed after the video was made, there's a bit of an annoyance that we found later on. It's only cell 1 that is required to be over 3.4v, which confuses the hell out of me about why they have done this. But I'm onto it and I'm finding out what can be done for the next batch to make it if ANY cell peaks, it turns on. Stay tuned, stay safe, see you then... bye bye ;)
Hello Paul
Can you use 4* 4S active balances across a 16 cell?
Eg 1st balancer on first 4 batteries and so on.
@@76queen I was wondering the same thing, with a fifth unit connected to every fourth cell to balance the four 4-packs. A complicated way to do it but the only way for now.
@PowerPaulAu I was wondering as I was watching the video why it didn't limit the first cells to reach top voltage to prevent them from overcharging, but it sounds like you're into it.
@@76queen no, that wouldn't work
@@HermitHippy yes, that would be complicated and inefficient. But I do have a 16S version
This is pretty wild! I literally (two days ago) just found a solution to monitor my JK-BMS with an ESP32 through Home Assistant (ESPHome). This was a PERFECT solution.
After watching this video I got to thinking... I wonder if I can use a Home Assistant automation to do this balancing? Well, well... IT WORKS! Home Assistant is absolutely amazing.
I went in and easily created an automation that triggers the balancer to "on" when voltage of the entire pack goes over 54v. Then another to trigger the balancer to "off" below 53v.
Problem solved!
I monitor and trigger all kinds of things in my home. Maybe I'll get to a video on it soon..
Maybe give home assistant a try Andy? If you do, it will keep your creative mind busy, it's addictive fun to me. 😉
Dan
Do you have any link ?
I'd also like to see how you are doing this!
This is good to know. I am in the process of building and I want to do this. Are you using HomeAssistant just for automations or is it useful as a monitor? I know I saw a home assistant Solar Forecaster I wanted to use to automate grid charging of my batteries when solar is expected to be insufficient.
Do you have tut how?
Oh, I remember and miss those electric blue skies Andy! I spent a little time in Perth and after returning back 'up-top' to America and Europe, I used to tell people who lived in polluted Los Angles, Dank, soaked Oregon and twilight, rigid Alaska, "You don't know what fresh air, blue skies and pure sunlight are until you go down-under"
@Paul Freeman, thanks for creating such devices together with Heltec, thanks for sharing Andy
Good morning Andy
I’m not really into building my own batteries but I can’t not watch your videos they’re all so informative and entertaining thanks for the amazing videos and help along the off-grid solar Journey
👍🏼👍🏼🇺🇸🇺🇸❗️❗️❗️🌞🌞🌞
Fantastic video Andy, as usual, you nailed it! Thanks for sharing so much useful info on your channel. Cheers.
I was waiting for your video from last 5 days
Likewise, what a relief.
You could use any of the cheap ones, open the solder jumper add the relay output of a victron device (mppt) closing the contact of the voltage fitting to you battery.
Or relay output from a BMV or a Cerbo.
I use a simple over/under voltage relay and use it to turn my active balancer on when the bank voltage goes above 27.2 volts and then turn off when it drops below 27.1 volts (for my 24V battery). The relay I use can also turn on at the low end of the voltage range if I want it to bottom balance, but I have not enabled the undervoltage setting on the relay. Seems to work pretty well and its cheap and simple.
A week too late! I just soldered in a switch for my Heltec 4s balancer to be able to toggle it on an off manually. This version is a great improvement.
Hello dear Andy, great topic!! An alternative could be found in using the Cerbo GX or BMV (from Victron) in activating the active balancer (Heltec or others) at a SOC of about 97% and shut off active balancing at 95%. This require some engineering because one have to implement the shut-on and shut-off arrangement. Still a great Dutch fan from out France….
I’ve just installed a 16S active balancer and use the relay on my Victron smart solar charger to turn it on or off based on the pack voltage. We’ll see how it goes.
Hmmm, this is a step in the right direction. But I think the default behavior is opposite of what it should be. It should start balancing if ANY of the cells are above 3.43v. This would be ideal IMO.
Personally I start balancing at 3.4v, no reason for it but my preference.
I completely agree, and I'm trying to sort this out with Heltec for my next order. This was actually something they don't mention in any of the literature that's not even available. So it's trial and error just like Andy is finding out.
120322/0357h PST 🇺🇸 120322/2157h Brisbane 🇦🇺 Danke Schoen, Herr Andy. This information is. Great relief, because the new HELTEC AB can, now be incorporated into the LiFePo4 pack, permanently, not worrying about its power consumption. Since my system is 2X12.80V/4S, the device will fit my needs. 73s…
Andy, I have learned so much from you!!!
Why the BMS manufacturers not add that kind of active balancer in the BMS 🤔
☕☕🤔🤔
Always the best technical informative videos Andy
Best regards from Philippines 🇵🇭
Yes a new video!
Right now - after a long winter seeing the 16x 280Ah LF280K cells idleing - i've got one cell pretty much peaking out switching the solar charge off once reaching 3.65V. The other cells seem only to be around 75% charged. The whole block used to be 1A top-balanced to 0.003V deviation using a JK-BMS.
So now the battery again needs a good new top-balancing...
Just to have it mentioned.
Btw. The Victron Smart Solar charger used to push with up to 70A once the charge is allowed by the JK-BMS. Once reaching 3.65V the JK switches the charge of. Shortly after it opens the charge again which makes the charger pushing up to 70A towards the block. The very short moment between turning the charge on and off again is enough to push more charge into the highest cell. That resulted in me seeing 3,7+V in the highest cell. So even though the JK cuts the charge at 3.65V you'll overcharge the highest cell if the charge-current is not drastically lowered and you leave the system alone...
Thanks Andy - great stuff as always 👍
Great video again Andy. Thank you👏
Hey Andy @Off-Grid Garage...just a weird idea... can you use four of these 4s Active Balancer from PowerPaul and balance a 48v battery? Hey Great Video by the way!! Watching from the Philippines :)
It would technically work as long as you overlap them, but it wouldn’t be as efficient due to having to have “multiple” transfers from the active balancers potentially between low and hi cells compared to a single 16s balancer taking the highest voltage cell and dumping directly into the lowest volt cell.
Hey Andy, thanks for the video, great stuff.
And congratulations for todays solar yield of 65kWh (still rising)! Waiting for the video about it. You said you will wait until 21st of Dec with the big test, you lied about it :)
When do you plan to open the "Not Quite Right Solar Seconds Store"? For all the real good stuff.
I hope helltec sees the video and releases an extra version with these functions itself. Have you already asked heltec?
Howdy - for the US people - I will have these in a couple of weeks: Heltec Active Balancer on>3.40-3.43v, Off
My Heltec 5A is relay controlled by my Victron BMV712.
I would like to do the same, can you detail how? settings? connections required please?
@@Tex260Z In the BMV relay settings. You can set the voltages you want to have it turn on and off.
But surely, the victron monitor acts on the battery bank's nominal voltage, not individual cell voltage? Then I do not see much difference at all between that solution and what this heltec is doing. It is slightly different, but more of a 'both are bad solutions'. you certainly won't be triggering the heltec once ANY cell reaches 3.4v....
@@edakimling133 I can understand your point. I like the idea of the BMV turning the Haltec on and off. Even if it's based on total pack voltage.
Not interested in any balancer that requires all cells to be above 3.4v first. Imagine when you have 16 cell system. Probability to lose the race for one cell to go overvoltage increases with 16 cells with a wider SoC spread likely. Starting the race when first cell goes over 3.4v gives you more balancing time and better chance to achieve balancing before highest SoC cell hits overvoltage.
On the BMS that provides enable control to active balance. Check if the enable control line from BMS disables external balancer for a moment when BMS is making cell voltage measurements.
The BMS still needs to manage cell voltages for low and high cell voltage shutdown. You don't want high active balancing current to influence the BMS cell voltage measurements. Balancer current influence will be worse on BMS cell voltage readings when there is little to no charge current dominating cell overpotential voltage bump up of cells due to charging current. Same charge current is applied to all cells, but balancing current is not equally applied. 5 amps of balancing can slump or boost a cell voltage by 15-25 mV when there is little charge current to dominate cell overpotential voltage.
If it does shut down balancer when BMS makes voltage measurements, you could also share common sense lines to cells without worry of balancing current causing voltage drop on sense lines during BMS voltage measurements, greatly reducing the 'rats nest' of wires.
Hi Andy, another great video. I noticed at the end you mentioned 3.55 volts. I live in a place where it gets pretty cold in the winter. I use 3.55 volts in my programing, can you guess what I use for the low voltage cut off? It's not the same voltage you use in sunny hot Australia. It would be interesting to see you do some load testing at colder temperatures, say 5 Celsius, maybe colder? Interesting things happen to LiFePO4 voltage once things get cold.
I don't think Andy will move or turn his garage into a igloo!!!!!
@@glencooke494 ha ha, I don't see him doing that either. He does have a world wide audience though. I bet it would help some people.
@@boatelectricaldiy He might be able to put one of those seplos things into a chest freezer maybe? He has the power to run that now!!
Andy have you tried the new ish daly APP ?
It has active balance with turn on voltage settings 🤔
The ultimate would have those thresholds able to be changed by the user. Set with trim pots, Bluetooth access to reprogram or another method.
A BMS should have something like this plug&play so the more advanced BMS with remote access (eg. Bluetooth) can control the parameters & the turn on/off. Mix & match with expected cell size & charging rates.
Looking at the bottom, they have become a lot more complicated already vs passive balancers.
Off topic but just a quick point. I recently purchased the ZKE Tech A20 and quickly realized that’s the 20 amp rating is deceiving. It can only charge 20 amps at 3.2v. When charging a 12v pack it maxes out at a little over 6 amps. The max charging is 85 watts
Excellent
Thanks
Aluminium bus bars, what a revelation 🤙🤙🤙
hi Andy,
i think the balancer has to start if the first cell goes over the upper hysteresis limit 3.43V (turn on threshold)
otherwise it may happen, the most high cell is already above 3.65V till the last cell rises above the turn on threshold.
And you can use the only availible 4S version for higher cell counts by simply overlaping them. eg for 8S use 3 balancers. the 3rd additional one in the middle for cell nr 3,4,5 and 6.
for 16S i would recomment 7x4S balancers.
in my 4times paralel 24V 7S/60P 18650 distributed DC-System, with random combined used 18650 cells, not selected for equal capacity! because over servicetime they will spread away in any case. i use at each location separate a standard helltec 7S balancer in always on mode.
theese balancers help me as well at the top end to get all cells close to 100%, and at the bottom end i can get out the last few energy from my batteries. of course only with very little current (fused with 15A per 60P block).
In paralel i use an 24V 8S LiFePo 20ah ebike battery with an standard helltec 8S always-on balancer. And in paralel i use old 12V Pb-batteries with HA01 balancers.
So, i have crazy mixture of many kinds of batteries distributed on my property. all of them seperately balanced, and seperately fused to max 15A due to the old installation wires (1.5mm²).
now i'm 3 years off grid, no problems up to now. and the system is still growing...
Hey Andy!!! Here's an experiment for Active Cell Balancing: Use your Victron BMS to trigger "on" the Heltec or xS Flying Capacitor Module. Trigger point for "on" could be 3.35V x # of cells in series, but it's programmable through the Victron app. In short, remove the solder bridge on the Flying Cap module and wire it to the Victron BMS. Cool idea huh? Look forward to you trying it (hopefully).
Sounds great! still trying to get someone to explain which settings in the MPPT I need to set to accomplish this???
I prefer the active balancer with JBD where we may be able to sense each battery voltage and then can pragmatically control the balancer.
I pretty much appreciate your technical details.
Keep it up, Andy!
Hi there i realy like all of your vedeos ived watch!!
Its realy helpfull !!
This is a step in the right direction.
Speculating as to whether a 16s battery could use 4 of these 4s balancers - may minimise risk of a runaway cell if cell 1 in each group of 4 is above 3.4v instead of cell 1 in a group of 16.
That would only balance each 4 cells. It wouldn't keep each group of 4 in balance with any other group of 4.
However I do have a 16s version anyway.
I agree with @JustDoItYourself that turning the balancer on when *any* of the cells goes above the threshold would be better. I wonder why they did not do this? Is there something about the HW design that makes this difficult?
Likely because they were trying to make do with existing hardware. Individually checking each cell would require more hardware.
I'm communicating with Heltec about this, it's slow and painful but will hopefully have a good solution soon.
Given what @Paul Freeman posted about only cell one controlling the function you are probably correct about needing additional hardware. However, the unit already has to know the voltage of each cell so it seems like the change would be in the control logic, not the voltage-sensing circuitry. I would *guess* there is a programmable logic array that needs to be changed.... and that does not seem too hard. (I say that with very little knowledge of the design so I could be way off base.)
@@centerrightproudamerican5727 The capacitor transfer balance does not do any voltage comparison other than shutdown of balancer when less than about 2.7v. The actual operation just charges capacitors from individual cells, parallels all caps to balance their charge, re-separates caps and re-applies to individual cells.
Andy I think you have served an ongoing apprenticeship while we all follow, with our own add ons. p.s did you do anything with the lead acid I have missed or still to come. Apppreciate you have been a little pre occuppied with good looking results.
18:52 yep, those are the right words, Andy. I totally agree!
Andy actually made a mistake there ;) I do have both 8S and 16S versions :D
I think I still just prefer to use a low voltage cut out relay on those pads that way if one cell goes high fast the pack voltage will rise enough
I would prefer on at 3.45 and off a 3.37 to 3.4v. Stopping at 3.3v is too low.
Heya, oh nice these are also in 16s version good to know
Any chance some of these will ever make it to the USA?
Please remove the extra glary plastic lcd-display protective cover next time.
But the bms will cut charging as any cell gets too hi in voltage.
52K on a rainy cloudy day, today was cloudy and I generated 0.2 kwh from 4 100watt panels, time to step my game up, my best with these panels is 2.6k on a clear day :)
How about Automatic switching on during discharging. Because my battery bank doesn't work below 40% SOC. In fact, it is because of the drop in voltage of a single cell when it goes less than 2.5 Volts.
This all cell over 3.4v could be a problem. I recently received a couple of Basen 460Ah pre-built packs and they are horribly unbalanced. I cannot charge them to anything higher than 14.1v without one cell spiking to 3.65v and shutting down the BMS. At that time, the lowest cell is still only at 3.38v with a delta of 270mv so even if this balancer was inside, it would not come on and balance. I have tested the battery for capacity, and it only gives 445Ah out of the 460Ah it should. At the bottom of the capacity test the low cells again spiked to close to 300mv delta. I contacted Daria at Basen and at first was told "put a charge on the low cell to bring it up to voltage". but this is in a sealed case. After I asked how to open the case, they changed their response to "This is perfectly normal" GGGRRRR!!!
Is the BMS sealed inside and you get the information through Bluetooth? Sure they installed a balancer along with the BMS. Is it turned on?
Thanks Andy
Great Video again, i Always Like your clear and detailed explanation, thank you so much. IT Sounds good there will be a Billion and more Videos shortly. Did i see a PowerMr balancer in one of your Videos🤔 IT would be nice to listen what do you think about IT, because i use one for 48v constellation (4 Basen 12v in series) Maybe there would be a Chance for a short Statement from you🙋♂️
can't find anywhere paul's website to order this? You Andy and others allude to just go to his website...but I searched now high and low and no site to be found. This is rather bizarre...
Hallo Andy
Bei mir schaltet meinen Balancer ein Relais vom Victron Cerbo GX.
Muss mein Seplos BMS aber extra über RS485 auslesen um an die Zellspannungen zu kommen.
Das wäre doch eigentlich ein Hit wenn das Standard bei Victron wäre...
Grüße
Must be a single guy to work all hours a of the day or night. Good work
Naturally everyone is equal but some are more equal. For example thee who donated are as equal as anyone else but only more so! ;)
Andy, what is the problem when the active balancers are working all the time (exept below 2,7V) ? The runaway of one cell during charging is more likely when the balacer start only when all cells are above 3,4 Volts, I guess. I think balancing at low voltages will pay off as well, when higher voltages are reached, so theres less left to do, and the risk of completely unbalancing (cause only one cell was run away) is eliminated. Is anything wrong about my thinkings?
If the balancer runs all the time, it will unbalance your battery if you're not fully charging it every day. We have tested this many times here on the channel with 16s and als 4s batteries.
Keeping the balancer on all the time will not work with LiFePO4 chemistry due to the very flat voltage curve. Only above 3.45V the cells can be balanced.
Balancing anywhere else will 'destroy' your top balancing. Balancing at low voltage (below 3V) does not provide any benefits unless your load is smaller than the balance current. But then again, it will completely destroy your top balancing. The balance will not be fast enough to restore it once reaching 3.45V.
@@OffGridGarageAustralia Thank you for your detailed Answer. In wise foresight yesterday I ordered a voltage limit detection controller, right after I saw your video were build in one into your QSO-Battery. Thank you so much for sharing your experience, for your vivid humorous funny english videos : )
I do Solve this problem in a different way that is not related to any 4s-8s-16s or other.
You can use your balancer that you already have.
I connect to the on/off switch of the balancer, a wifi switch shelly 1, that can work in dc voltage.
I then connect the Shelly to my wifi where also the raspberry victron venus os is connected.
On the venus I can see all the voltages using a cable rs485 as already Andy showed some videos ago.
With few flow on node-red I can switch on and off the balancer with the shelly and you can put your own rules
8s or 16s can be resolved by hierarchical BMS balancer setup - e.g. 4 groups of 4 cells using 5 balancers?
There is now a 8s and 16s version of the Heltec balancer with these features:
Have a look almost at the bottom of the website: off-grid-garage.com/battery-management-systems-bms/
I’d like to purchase the good bus bars from Paul. How do I get a hold of Power Paul Australia? I looked him up and only see him on Facebook. I don’t have face book to communicate with him.
I’m sure you’ve had the question many times, sorry.
Love the videos!!
Hey Andy.... I need the 16S Automatic Active Balancer. so compile a list of people from around the world. I am Urban living on the small island of St. Kitts. I am off grid using PIP5048MXG in parallel. Each inverter has 8 solar panels.
another great video Andy. The price difference is not insignificant as others have pointed out. Currently AUD 150 (+$65 for a screen) for JK Vs AUD 350 for JBD. Is it really twice the BMS. I'm I right in saying the JBD can not be used with Victron Venus because of a lack of CAN or can it be used if no LCD is attached? Thanks.
@Off-Grid Garage - 01:50 - Temperatures of 240 amps at the moment? Temperatures, hahahaa. I'm the 1st one who noticed that....
i think i have read that the active balancer starts at 100 mv difference , so just turn it on when you load the battery and all should be fine.
Maybe something hooked up to the switch part to make the AB adjustable?
If a cell is hugely out of whack with its SoC then doesn't that mean that cell will never get balanced?
Yep. That logical AND as a condition is a deal breaker.
Can't you control the active balancer with a voltage controlled relay?
Yes you can. There is a switch pad right on the original PCB.
Hello Andy! Thank you for all of your videos they are great! I was talk to Heltek and they clamed that this balanser onely detect B1 voltage. That mean if B1 will be 3.43v it will starts no mater if other cells will be below 3.40v. Could you check it please?
Hello, does this balancer work on nickel hydro batteries, knowing that the cell is 7.2 and in series two 15-volt cells? Thank you.❤
So how often do you tap balance, your batteries?
Hi, Andy.
I was hoping to learn how you connect that BMS to work correctly with (8) 280Ah batteries in Paralleled for a 12 volt system, I have it connected as if you were using just 4 batteries.
Sorry for asking you.
I use this for my RV living arrangement, plus I am very, very, very seldom ever close to shore power, so I live on my solar..
Thank You.
Is it eight 12v batteries in parallel? That would not need a balancer.
Or maybe 2 in parallel and 4 in series? If so, then you use the same 5 wires for the 4 battery groups as normal.
@@JasonWW2000 Thank You.
I have now built a 3P4S 12 volt system.
Yes, that is 12, 280 Ah batteries with a 500 AMP Daly Smart BMS.
My biggest problem is that 3 cells are always at 3.7 and the other 9 cells are at 3.5 at the end of a sunny day here.
I simple hit the breaker for my solar panel and by morning all 12 batteries are at 3.5.
So I bought a 16 S Flying Balancer and will use 12 leads and hopefully this will help.
Thank You Andy for the reply and video.
@@guohuaye12 You only have a 4S setup meaning there can only be 4 different voltages.
When paralleled, the 3 group cells are always at the same voltage. They physically can't deviate.
You only have 4 different groups to balance. If you wire all 13 leads (not 12) its just going to show cells 1, 2 and 3 at exactly the same voltage, cells 4, 5 and 6 at exactly the same voltage, etc... It should work, but it might sense that the wiring is incorrect.
I assume you have lifepo4 cells so 3.7v is overcharged. Its possible that 2 or all 3 of those cells are "healthier" than the rest and simply take a charge better than the others. I would recommend moving those cells around. Swap one of these healthy cells into each of the other 3 packs. Then take the 3 leftover cells and group them together. Now the healthy cells are spread around more evenly. Now try charging them and see if they charge at a more even rate.
@@JasonWW2000
WOW! Thank You. 😄
Yes I do have LifePo4 batteries, they don't all match (three different brands) but they are all still holding 80 to 90 percent charge with no problem.
Great idea, I can move those three around, they are next to each other right now.
Naturally I striped a ternimal and I am repairing that this morning with some Loctite that makes threads, it has worked on twom of my other cells.
And yes I will of course attack all 13 wires (the black b-1 to 1st negative.)
Thank you for taking the time help this old ( nearly 80) guy.
You're the best, I've subscribed to you in the beginning.
Thank You
Rick living in sunny Arizona.😎
@@JasonWW2000
I would like to say.
I know it is about 05:00 am where you live and myself and my friends (also your subscribers) want to Thank You.
Great system. The true test will be winter time..
Sweet🤪💥
hello. im just studiyng about lifepo4 cells, for build an efficent ebike soon.
i planning make 16sets battery ,with 3,2v cells ,no paralel connect
that Mullerenergy balacer looks oversized.
it would solve the problem if they just add manual on/off switch to the active balancer?
so when battery have low voltage, and already discharged, just turn on for a couple of hours.
That will work as well. I have such a switch in one of my larger 48V batteries as well and just use it to activate the balancer.
th-cam.com/video/ZplbAAqnrjo/w-d-xo.html
What's the point in only shipping in Australia. There is only a few dozen of people living there 🙂 Nice evolution of ballancing though, I will keep watching this product to see what happens! Good luck. Worldwide shipping for the win!
The point is the $$$. If you're happy to pay for my time to fill in the customs forms, then drive to the post office and stand in line to lodge it, and then return home, then it'll be worth my time. I have to keep it economical though.
@@PowerPaulAu Agreed- having shipped a faulty item return to China recently I can only concur. It’s a PITA.
@@PowerPaulAu Sorry for any offence Paul. I was just trying to appeal to the Auzzie sense of humour! I think what you have done with this and the time and effort you must have given it is awsome. Good luck in delevoloping it further.
Hi Andy! Please, help me with my soldered 15S LiFePo4 battery pack. Every time, when I'm trying to charge the battery, the last two cells goes to overvoltage and bms blocks with cell overvoltage protection. I use the ANT bms with approx. 130 mA balancer plus additional inductive 1.2A balancer, but they can't solve the problem.I have no ability to reassemble the battery pack. Thank you for you help!
You now could have a 1000 kwh battery system.... so many solar panels and so much power you have......
I am using Daly BMS 100A with 4S prismatic cell 3.2v and 280Ah. Can I use this Heltec balancer with Daly BMS ?
Yes, absolutely.
3.5 V on, 3.4 V off - on ANY cells - would be better.
If it only starts after all cells are high why even use it and you only actually have it only top balancing?
Hi Andy and Thank you again for this video,yes it's a shame they don't do it in 16S (or else you have to buy 4?!) but not sure they would be perfectly synchronized??
Another thing Andy, I saw that you had to connect your JK BMS with the screen to Only see the cell voltage..
It's crazy because I looked for 1 screen that only gives the voltage of 16 cells, and I found only 1 only on Aliex, obviously
(search: single cell voltage tester 1S-24S) and it's too expensive!! it's almost the price of a BMS?!
I am very surprised that manufacturers like Heltech, or others,
does not offer this simple product?
Only to be able to control the voltage of each cell? ..
Other online searches have yielded nothing, only an 8S?
If you find? it's interesting?
Good day Andy, and thank you again for your video.
I can supply the 16s or even an 8S version
Hey Andy, Been looking at your VRM and noticed your batt temp is constantly 2 to 10 degrees warmer than the OGG. Do you think it is from the higher charge/discharge rate or from something else?
Andy, You should market a Scottish version of that T-shirt, only a minor redesign needed.
Move the decimal point one digit to the left!!! 😭😭😭
It's been cloudy all week here in Ohio with the sun only coming out at the end of the day just teasing me
So is Daly 16s active balancer curently the only one that offers active balancing with turning on at specific voltage for 16s pack?
Sorry din’t see the pinned comment. Hopefully new version will be available for EU customers too.
I bought a voltage relay to do that. 20 bucks.
VERY good!
Pull of the plastic protection cover on your battery display. Reflection (nearly) gone! I promise. ;-)
Hmmm, I need to ask them if they will do a similar thing for my LTO car battery build...
I wonder how many I would need to buy :-/
Thanks
Thanks for your generous support, David! 🙏
Ich versuche genau das mit den Relaiausgängen meines Cerbo Gx in Verbindung mit MP2 zu realisieren.Der 16S Balancer hat eine Lötbrücke welche ich geöffnet und durch einen Schalter ersetzt habe.
Leider ist es mir bis jetzt nicht gelungen über zb. das Generatorrelais den Balancer Spannungsgesteuert zu schalten.Ich würde diesen gerne bei 54V einschalten und 53,8V ausschalten.
Das wäre doch mal ein Vetsuchsaufbau für Dich !
Is there an 16s version? If yes, where can I buy it?
Judging by the way he said only available in 4S i guess not 🤔
If they sell well in 4S i bet they will follow soon enough?
See Paul Freeman’s comment above
Entferne doch mal die Schutzfolie evtl. hast Du dann weniger Reflektionen :D
Oder mehr........ ;-)
@@Juergen_Miessmer .....oder weniger.
I need help in opening tripping of my batt.
I use active ballancing modules as my cells are mismatched. I cant afford replacements. My little unit is connected full time, once the battery strings are charged a rarely noticed voltage indifference only when it wasn't installed.
Привет, Энди, мне понравилось твое видео с тестом, спасибо за интересный обзор. Мог бы ты поделится ссылкой на магазин, где заказывал усовершенствованный балансир 3,4-4,3в.
Super Video dazu danke 👌👍
Can I make s switch on possitive wire Red to turn off the balancer? or a switch on Negative black wire to turn off the Balancer? or have to make both? I don't want to pull the balance wires to turn on or off. Thanks
If the cells are top balanced why do we need a balancer? The purpose of the balancer is to top balance the different soc cells. :) The main problem of these balancers is that its very hard to turn on and balance if one cell is already reaching 3.45V. If all the cells are over 3.4.. then even the 150mV passive balancer does the job overnight.
Not really...the passive balancer DRAINS the higher cells to have same voltage across. But because the cell's voltage is not indicative of the SOC, you could have a decent amount of power lost. With an active balancer, the idea is that when over 3.4, it helps move energy around...and thus the SOC is achieved equally among all cells. So by the time 3.65v is reached, ALL cells will reach it.
And even if you top balance with grade A batteries to start with, due to small differences in resistance...which also changes over time, they will drift apart. It's just the way things are. These active balancers basically need to be perfected and then incorporated into the BMS. This is still ongoing in the industry, so meanwhile people like andy are testing things out and letting us know which devices come close to what we ultimately need...
Use this active balancer for li ion (4.24 volt )
Do you have any solution for limiting current between parallel packs when reconnecting at different soc?
One question:
Is it necessary to top-balancing the batteries at the first time? They would be charged with the charger and activ bms in the same way, or not?
If you charge them slowly to allow the balancer to do this job, it will work without initial top balance.