The JK BMS with integrated active balancer. This is the one!
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- Опубликовано: 5 окт 2024
- This is one of the most exciting delivers I got for a long time. It has finally arrived: the JK BMS with integrated active balancer. The all-in-one solution, the Jack of all Trades under the BMS'.
After some initial problems to get it started (the manual was in Chinese), I am very impressed with the first few tests I'm running: over voltage, over temperature, over current... all disconnects the charger and automatically reconnects after the fault has cleared. Even the app for Android looks very mature and is working without any glitches.
Is this the BMS we have waited for? It really looks like it!
All information, specs and links for the JK BMS are here:
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Thank you So Much Andy for testing all these BMS's, making all the same mistakes we would have done and doing all the research , FREE for all of us to learn and enjoy, you are are the mother Theresa of the solar world, ok maybe not, Ghandy is better suited for you ! 😇🙏
Thanks a lot Gilles! Appreciate your kind words.
You have made sourcing and comprehending this topic so much easier.
Hats off to you Good Sir! 🎩
So I bought one. Came 2 days ago. Installed no problems. Started with 6v battery. Worked fine. Balanced my battery on first charge cycle. Excellent product. No more Daly. Thanks for the video.
Hey, that's great feedback. The internal balancer is amazing, right? I really like the functionality and ease of setup.
Hey bud, just curious, I'm looking at both the Daly and JK bms to replace my ANT BMS on my ebike due to the inadequate balancing force and the fact it is passive on the ANT. What is better about the JK over the Daly? I am looking to run 250 amp peaks. Nominal will probably be around 100 amps at cruise velocity. Will the 200a JK do 250 amp peaks??
I bought the150A version based on your movie. It arrived quickly and your work made it really easy to set up. Thank you so much.
It is through this invaluable video that I found out how to turn on the BMS without that dratted switch which has to be bought separately here in the Philippines. Thanks for this.
After watching many videos of your chanel, i eventually decided to buy this BMS for my 80ah 7s li-ion battery that i've got from an electric stacker (the BMS was dead so they gave me the battery).
Thank you for sharing your experience.
Thanks. I've just installed this one permanently in my battery shelf. It works great.
Wow. You actually show all the features working instead of most posters assuming all the features work. Very much appreciated!
Thank you Andy. I have finally received not one but two from China (the first one was lost then miraculously found). Just about to connect it all up and your videos have been a tremendous help. Cheers from Spain.
Would be unable to setup without Andy's help!
I really like how the active balancer was still working 2A in one cell when you did some bms shutdown limit tests too. Good info n vid. I have Iphone, so I hope the App is as good as this one of urs. Thanks for all this great info Andy.
Thanks Evan. I believe the app is the same for iOS and for Android.
So this BMS is completely configurable through BY from iOS or Android…mo PC with Termite required?!? If so, take my money! Could you provide link to ENG user manual?
Thanks for the video! I ordered this BMS after viewing your video a couple of years ago. My batteryproject has been delayed until now. So today I will start installing my JK BMS (JK-B2A24S15P). AND you helped alot so I will not get stuck with a BMS that would not start ;) Thanks to you I do now know the +5V start-trick :)
My battery is a 20S33P li-ion battery that I have built for my electric moped.
I've been running two of those for the past year without issues. Probably the best BMS in this price range one can get.
You helped me start my unit a long time ago :) Still running without problems. Thanks ;) I fear the price of this unit will go up like a Falcon rocket now :)
@@mrzed6597 NP :) I vaguely remember. I've done so several times for other people as well on the forum - at least there appears to be a manual in English floating around now. There should be enough vendors out there to prevent too much of a price hike. That said, with component shortages worldwide as they are, that might impact pricing as well.
@@upnorthandpersonal I fear it will be like the cells. A year ago EVE 280Ah was $1800. Now it is $2300 (for EU). More demand, higher prices.
I agree with up North and Personal. I have two of these running now perfectly for quite some time.
@@upnorthandpersonal is there a direct link to EVE?
Ce BMS est étonnant et incroyable ! je ne savais pas qu'il existait c'est vraiment un BMS HYBRID et très complet.
Pas si complet, Il est bien mais il manque la gestion de la résistance de pré-chargement et impossible de gérer plusieurs bms sur la même interface rs485.
Supper Nice BMS! Couldn't setup without your help!
Andy, I've learned more from your videos than from any other source. Carry on!
Thanks a lot Mark!
I can't thank you enough for making this useful video!
My hesitation to build my own battery have been solved
Thank you very much. Good luck with your battery build.
@@OffGridGarageAustralia📌 *Есть мысли, чтобы при отключении городского 220в, автоматически включалась JK BMS* ❓🤔 В Щитке стоит АВР
🎉🎉🎉🎉🎉🎉yesssss now you are in shape, I was waiting for this video since you started, I have 4 years working with this BMS and not a problem at all there are the best for your needs, congratulations 🎈🍾🎉🎊 you finally find the one 💪🏼💪🏼💪🏼💪🏼
4 years? Jeez, now I feel like I've been living under a rock.
Thank you. They are on the market for quite a while. Good to hear they last a long time.
I immediately bought one the other night after you posted this video. Just have shipping confirmation today. Thanks for the recommendation. I look forward to another video about what you learn about this.
Coming soon. Don't be scared by the next video though 😌
Please share the link with us
@@jwsolarusa it's in the video description...
Hi there I just got the new jk 200a with the display.
It only has a red and black wire on the cable not hooked to anything. You connect these momentarily to start it. That was nice.
The cable going to the display does not have the 12vdc power to power the display. I'm using alligator clamps across 4 cells to power it.
And it is mostly in Chinese so I asked if you can change language somehow on it.
It was 29 bucks. With the app I think it is not really a got to have item.
The app wouldn't see the bms. So I had to go in my phone app settings and give it permissions. Then it worked.
This is the 2a 24cell 200a I'm using on 8cell batteries so I had to get a 24 to 48v boost to power it.
All in all I think this is a great device. I'm glad I got it. Nowi have to fully charge and draw it down to get the meter calibrated.
Of course we want more testing and we love the looong videos!! Keep it up Andy and don't forget to calibrate in between ;-)
Thank you. I tried to keep the video shorted but it's just toooooo much to show 🍻
Power off voltage is the voltage at which the BMS itself turns off to prevent slowly draining the battery.
Funny side note: the very expensive LG RESU 10h does not have it (or set too low). A unit's battery was completely drained when it was 1,5+ years in a storage. Lithium batteries loose max 3% SoC/month.
Ah, right.. that's a good tip, thank you. Makes perfectly sense. So turn off voltage will turn of the BMS once one cell hits this voltage?
@@OffGridGarageAustralia Yes, exactly.
Just in case, like me, you have a BMS already and simply want the equivalent Active Balancer, JK also sell the same thing but as an active balancer only. If you already have your battery assembled and taped up, they also have an adapter board that you can plug your existing BMS wiring into from the battery, the adapter goes in to the active balancer, and has ports to cable to your old BMS.
Ah, great information Trevor. Thank you. That's very good to know. Such an adapter makes a lot of sense.
Yes, Finaly a great BMS - Just like mine. You will love this!!!
I already do!
What is really important with solar is that the charge current is as high as continuous discharge current. Great find.
Both 200A for this one. Far more than I need.
No !! A real metal case ?! Crazy talk !😂 Our great grand children will have no idea what we're talking about ! My first good laugh of the day ! Thanks !!
I know, it sounds, crazy, right?! 😂
Also known as JK Heltec BMS. As we said half a year ago it is the best product for these cells. You did a big detour, but at the end everyone comes to the same conclusion :) There is a big thread about this BMS on Will's forum. With the description how to start it with 5V using a lab power supply. Also RS485 communication with RasPi.
Do you know of any US resellers that stock these?
@@CROSpunkie Sorry, I am from EU. So I do not have a clue :) I ordered directly from China.
link please
Where is wills forum
I knew about these BMS' for a long time already but I also wanted to explore other options, like the Daly and the QUCC with relay, the active balancers and smart balancers. All this all in one unit makes totally sense.
Had really hard to find a good BMS, i needed minimum 120a x3 and overkillsolars is only 100a. So I just ordered 3pcs 150A of this BMS to my first off-grid planning (even stocked in Poland :) . Thank you for reviewing different BMS! /Greetings from Sweden
I own a JK Smart BMS and I'm super happy with it so far...
Highly configurable, no need for extra messy wires for balancing...
I just think that, for big packs, they could allow fir up to 5A balancing and, of course, thicker cell wiring.
Just hope they keep updating and supporting!
Based on your review, I bought two of the JK-B2A20S20PHC (maybe I'm destroying one, yet better to have two than needing one). Thanks for your work!
The settings look similar to the ANT-BMS. Only the that one has no active balancer. Really good video
Thank Holger. Never seen the Ant BMS or the app. I thought it uses the same xiaoxiang?
Andy,
Nice to see your channel. Very good
Hey, thanks
Hi Andy I've been using what looks like the same BMS (JK BMS) for over a year now, works a treat, the only pain is having to have 3 volts above battery voltage to switch the BMS on. Once its on it does stay on, the reason I got this one is for the 2A balancing, my other one was balancing too lower amperage.
I'll have to figure something out in regards to the start voltage. It's not ideal having that but manageable.
The BMS seems ideal as it combines a great BMS with an active balancer.
Yup, im running into that issue consistently :( today, i just cant get either bms to turn on at all
@@OffGridGarageAustralia Was this topic followed up here! Or are there updates on the part of JK that enable switching on through another function?
@@bstaab2590 That has been sorted with an upgrade on the BMS. It now comes with a start button and a display. I tested the 4S version with display here on the channel: ruclips.net/video/LDalnC01MZE/видео.html
Is the new version with start button and display only available as 4S version (that’s the only link on website). If not, can you please provide link or part number for 12S+ with start button?
This seems to be the one! 8s available now also! Awesome! Thank you.
8S, I can't find it on their site. BMS starts with 14S LFO..
I like the opening few seconds of the video, very funny.
I think a lot of people will not get it unless they or their offspring have played the game.
😊
Just recieve the item today
Thanks for the detail video Sir!
I just ordered that same model, I've never put a pack together before infact I don't even have the cells ordered yet, but I'm getting 16 280ah eve cells, I've got 5600 watts of panels and 4 12v 200ah lifepo4 batteries in sires for 48 volts, so I'm gonna build this pack and wire to parallel to my batteries
I'm in Canada about the same price but ca$
Dear Andy, for LiFePo4 this particular BMS (and as far as I can see all from this line) in fact CAN be used for 8S setup. LiFePo4 - from 8S, Li-Ion - like from 7S and LTO - yes, from 12S onwards). This is taken from specs page on Ali.
It even works with even lesser cell counts but then you need to supply it with an external 12v supply to the B+ pin on the balance connector.
Heya, oke oke that looks like a very good bms can't wait for the next vlog with testing this bms I still need 2 bms's
It will be interesting to see if the RS485 port can be interfaced with the Victron products. Do the talk the same protocols.
Yes, they do. Brad is working on this at the moment and I will announce it her on the channel if he gets this sorted. He's working on solutions for other equipment as well, DALY, QUCC BMS' and other than Victron gear.
Can you give it a try and a feedback if it works?
The only possible issue is that all mosfet based BMS, if they fail (IE due to high voltage spike from broken solar charge converter), will fail with a short. Thereby allowing full access into the battery. For that reason I'd be more inclined to use a BMS with a separate contactor
Yeah, OK, fair enough. The BMS should be the safety device for the SCC. If the SCC fails, the BMS should turn off. So you mean we would need a third instance of safety. Something like SCC->BMS->contactor?
@@OffGridGarageAustralia There was a case on the forum where a 24V SCC got into short allowing the PV 100V 10A directly to Daly 24V BMS (FET's shorted too) and to the LFP cells. Cells bloating, magic smoke released. Since then we are searching for a cheap preventive solution to this possible battery killer error.
So cool. Glad you found and shared. Now… to find one for 12v!!!
You can use it with a dc to dc booster from the same 12V to get the B+ line between 40V to 100V to use it anyway. Remember just that the dc-dc booster could drain the battery if left connected without charge for a long time.
Wish I could get one for my 24v system as well.
@johthe will this work with the BMS as well though? It works with the active Balancer I showed recently but with the BMS???
@@OffGridGarageAustralia Now we have to test it, don't we. I reason they can not tell it works with lower number of cells since it does not come with an extra DC-DC booster included in the package and it would be false advertising if they would announce it working with less. That is why it varies with cell chemistry to get over the 40 volt minimum to use and drive it directly with the monitored battery. That said it could also be that someone of us is wrong..
Nice 👍 thanks for sharing.This video is 2 years old now, why are thwy still selling separate BMS and activ balancer ?
Andy - we all had to learn how to start this BMS I use a 2S pack of 18650 and connect positive to B- and just touch negative to P- (it takes less than 1 second).
I have to figure out something elegant for that. Like a start button at the battery shelve ;)
@@OffGridGarageAustralia a small 2s pack with a press button on the positive should do the trick. I understand in the beginning you need it more than once, but as soon as the battery is up and running, how often will you switch off the BMS ?
Ahahaha! I was reading the specs for that BMS when you reminded me of my little adventure. ^_^
Couldn't resist 😂
@@OffGridGarageAustralia I'm ok being "the idiot that proved the value of T-class fuses" ^_^
I saw your adventure! Be careful!
As some one who does power systems and off road equipment I can tell you, all ways crimp and solder! then double wall heat shrink!
Thank you for your very useful videos!
From my understanding, when voltage drops below 2.6V, it turns off the discharging MOSFET, but it is possible to automatically recover by charging to 3.0 V.
When voltage drops below 2.5V, the BMS shuts itself down to minimize battery drain. It will need the Vbat+5V power supply trick to restart.
Does it shut down if one cell goes below 2.5V? Is that a feature? Have you tested that? I'm curious...
JK has to be the best I've found! I have had the JK (balancer only) since the beginning of my setup and absolutely love it. (I use it for monitoring) and only balance at above 3.4v as a maintenance tool every now and then . This combo BMS/Balancer is the one I also will upgrade to at some point. Great Vid! Thanks for sharing
I also use two active balancers from JK. The problem with them is that it does not have the automatic start and stop function of the balancing depending on the cell voltage, at 3.5 volts for example. How do you start the manual balancing when you need it? leaving it on permanently could destabilize the cells.
@@mihaitaiosub Spot on. That is not available on the balancer only version. I leave the balancing off and only turn it on for the occasional maintenance. I wish it had the feature to turn on and off at certain levels in the settings.
@@danfitzpatrick4112 That's what I did until a day ago. Yesterday I made a small electronic change to the two devices that allows me to leave the balance on, without the device to do the balance in real time. I really trigger the balance with an external relay energized by the Victron charger depending on the total voltage of the battery bank, in my case I set it to 54.8 volts.Now it works perfectly. If you are interested in the change I can teach you.
Thanks for sharing, Dan!
Yeah I had a totally different brand and type too where you needed to use a multimeter on diode tester and connected across the b- and p- to get the BMS to turn on after you first connected the balance leads
I've seen some where you just short b- and p-, and others that have a separate trigger wire to touch 5v to turn them on. I suspect this one can be triggered on by doing what they said at 12:55 (touching 5v across b- and p- then connecting the battery) which would usually fry a BMS but this one seems to be made for it.
You've been saying "Please! please! please!", expecting a lot of packages eh?!
Great video! As always :)
Thanks Michael. Getting new stuff all the time and I was waiting for this for sooooo long now...
thanks for help .
092521/1608h PST 🇺🇸 092621/0908h Brisbane 🇦🇺 Good day to you, Andy. Thanks much for exhibiting relentless quest for perfection. But for me, my CNS got hay wired and I’m in total confusion. Don’t worry, it’s my intelligence or the lack of it. I do really appreciate the mirth and the technology mixed together from Brisbane.
Take care, Sir; please continue your quest, research and results for the public. Errr.. I saw a glimpse of Oettinger !
Have a nice weekend and 73s…
Hey Andy, that BMS is very similar to the BMS on my electric bicycle setup. The resistance is really nice, because my bike battery is made from used 18650 cells, so I was able to learn about a high resistance and it protects the bank before it causes further damage. Also It needs start voltage to turn on also, but it turns on during the bulk charge cycle or in my case with the bank is low or dead, i am dumping as muck voltage as the 48v laptop charger can pump into it and because the charge voltage goes more than 5v over the bank voltage, it triggers it on.. and it starts doing its thing. The BMS on my bike turns off if you dont charge it after a few weeks, like something internally is ran off capacitor voltage or something.. but it turns on as soon as i plug it into the charger. The only time this bothers me is when the bank is 100% charged aand i have not charged or used the bike battery for a while, when i plug it into the bike, the BMS is not actively working at that point until i plug the charger into it again to charge it. Mine is like 30ish days it lasts before turns off..
Thanks for sharing, William. Yeah, I wonder how I can do it when I have the battery in place. Not that the battery or BMS will turn off often but the occasional disconnect can happen and I don't want to connect a power supply all the time to trigger it again. Maybe the external e-bike charger is enough though... needs more testing...
@@OffGridGarageAustralia if that bms is like my bike bms, as soon as solar starts to charge the battery it should trigger it during the bulking stage.
@@williamhustonrn6160 Hi,
I received this BMS based on this video. So I have no clue about making batteries or connecting this stuff, and learning as I go along. My understanding is that I plug in the BMS and hook it up to the terminal where the charger terminal connects, when it's connected to the charger the extra voltage above 48v will activate the BMS?
I also will be using my battery bank and this BMS in a DIY scooter. So I just need to make sure it works right. Thanks.
THANKS GERMAN AUSSIE MAN 😎👍🏻🍺☕☀ IT ACTUALLY HELPED ME A LOT :D AS THE MANUAL IS CRAP! AND THEY KEEP CHANGING EVERYTHING! HINT: APP ONLY WORKS IF U SEND YOUR GPS LOCATION TO CHINA! (it will not find the JK BMS via Bluetooth unless LOCATION SERVICE (GPS) IS ON AND IT U ALLOW THE APP TO USE IT)
That's a nice all in one solution Andy. I will sure be looking for that when I build my system. Cheers! "SPAT"
Thank you Bill 🍻
27:07 "... the only i have not seen here is a pack overvoltage..."
You are correct that to get to that pack overvoltage, it needs to reach cell overvoltage first. What I am interested is an overvoltage from the "source" wherein BMS disconnects itself from the SCC if incoming voltage is too high
Dont forget Daly BMS’s are widely used. It is all i can ask for to use in my 14s e-scooter. Its 12Ah and peak output of 18A. It doesnt need anything too fancy
Hi Andi,
which BMS is now the best you ever got hands on and tested for a 16S large capacity battery ?
and
which active balancer is the best you ever got hands on and tested for a 16s large capacity battery ?
as there are 12A active balancers popping up on the stores now, did you also have a chance to test one of those ?
Grüsse aus München (und ich denke ich darf dir auch Grüsse von Christian (der Kanal) ausrichten) 😜
I liked the part where the Oettinger Pils is the solution of the day :-)
An important point for the JKBMS setup is the voltage calibration. Measure the voltage exactly at the battery connectors and set this voltage in the BMS-Setup. The BMS works well in total but the SOC finding is a mess. Why the did not make an entry to setup the SOC in the setup menue manually? Daly BMS has this option and it is more favourable to enter or correct SOC from time to time.
Hi Andy, although this video is already 2 years old still very valuable. I'm currently setting up 2 48V batteries with these JK BMS's and found this video very helpfull. Thank you very much for this. But despite this I still have question left and that is regarding the size of endlug you mounted onto the black and blue cables. When I look at the diameter over the strings (5mm) the diameter of the lug should be more than 5mm. I would say 5.5mm which belongs to the size 16mm2 lugs. Do you agree on this? I would love to get your answer. Thank you for all the great work you are doing I learn a lot from your videos. Kind regards, René
One thing to know about active balancing that is often missed if it’s not done correctly it can cause extensive wear and damage to cells. I would stay away from it unless you know it’s done properly and purchase a separate unit
Has anyone here figured out a good way to jump start the JK BMS without an external power supply? I was hoping to avoid buying one since I only expect that it would be useful one time...
Great Video Andy! Appreciate detail - and if a video runs long it means more detail, more learning and more knowledge shared. Just bought this BMS on your recommendation. I would really like to see a video on simplified starting procedure (using a 9v battery for example). I have visions of a tiny 9v battery just exploding with the wrong hook up lol!
These Videos are FANTASTIC and made me start to design my own system. I have a question from Scotland though; Will the JK BMS work with the Multiplus 2 directly without a shunt? If so, how does the MP2 know the state of charge of the battery? Many thanks
Gavin
Thanks Gavin and welcome to the channel. Yes, you can just operate a battery, a BMS and the Multiplus II without a shunt. The Multiplus II will measure the battery voltage itself and disconnect if the battery is empty. No problem with that.
@@OffGridGarageAustralia This is good! however we still would like to know whether it will display the battery charge percentage when connected to the raspi Venus OS using a mk3-USB interface? We are keen to know the State of Charge at all times.
Thanks for your time 😀
Any thoughts on the above Andy?
@@GavinWallace18 I don't think it will display any SOC or battery state without a Victron battery monitor or shunt.
The B2A24S20P specifications now state that it will work from 8S-24S for Lifepo4 batteries.
And it should also work for 4s/12V systems with a small booster installed. I'll test this soon...
@@OffGridGarageAustralia I just placed an order for this based on your tests. Should arrive sometime around the first week in November. Thanks!
Looks really good. Ticks (almost) all the boxes for me, but I really wish they would also make some that are 4S and handle 250A, that's a sweet spot for some of the things I do.
But for a home setup, it's ideal. Having so many settings is great, but for some people it may also be overwhelming, and it's sometimes a little too easy to make a mistake which causes problems. But hopefully it's pre-programmed with generic safe settings for the majority of people.
Good find Andy, I'm sure one will be on my bench before too long.
* Not sure about the main cables though, they look a bit small for 200A continuous!
Thanks Paul. That's the big - on the list. It wont' work with packs below 15s configurations. The same with the active smart balancer I showed recently. 30V minimum voltage. I wonder if that is because of the active balancing and they need that voltage for the circuits somehow.
@@OffGridGarageAustralia It will work with 2-24 cells, but it needs a 40-100V supply on the B+ terminal, which can be generated by a DC/DC step-up converter. The B+ terminal is supply only, it can be different from the battery +. The current consumption for B+ is max 10 mA at 100V, so a very small step-up converter is needed.
Yip I am also hoping for a 4s one
Could you open it up and check the quality of cable connections to the BMS and what kind of cooling they have those MOSFET's? Thanks. I have older versions of active balancer and they work great.
I will open it and check that. The cooling is not too important as the internal resistance of the FETs is only 0.3mOhm. At 200A, that's only 12W of heat generated.
@@OffGridGarageAustralia True. However, one has to take into the account quality of solder job on those wires (which is wrong execution of how to attach wires to begin with) and fact that we are dealing with lowest cost china made FET's.
Love the thinking behind this product and have been looking at these BMS/Balancers since last December but 7AWG wire and its attachment to the board has me bit worried. Looking forward to your next video. Thanks
@@DMIINC2013 I wouldn't be surprised if this has Infineon or International Rectifier MOSFETS in it. Low RDSon MOSFETS are not that common, and even my low cost inverter had these in them. I remember opening the BMS as well, I just don't remember the FET they used...
promissing looking indeed andy, following with great interest
I'm really excited about it.
so far i've been testing my seplos bms's , they have as added benefit that they allow intercommunication up to 6 bms's and inverter.
however, its never bad to have an alternative
Danke für die tollen Videos. Sie halfen mir eine Kaufentscheidung zu treffen.
Grüße aus Deutschland
Danke Dir!
Thanks for the excellent all-in-one BMS review. I really like the Voltage Threshold setting so balancing only occurs during the charge cycle above the Set Point voltage. The only thing that worries me about this product is the 200A current being passed through the PCB, much prefer a separate high current contactor or relay like the QUCC product. Really hope they upgrade the firmware on the stand alone balancer products as well. I'm using the 2A version on a 120Ah battery and discovered the same thing you did, continuous balancing in the flat part of the cell voltage range tends to unbalance the cells. Perhaps a future video you could go into more detail about the CAN and RS485 communications.
Thank you. Nothing I have tested so far was 100% perfect. The JK BMS though comes very very close and I would give it an over 90% rating so far. I'm not worried about the 200A for two reasons: I'm not going to push more than 100A through it anyway and the internal resistance of it with 0.3mOhm is so low, that even with 200A it causes only 12W of power loss. Heat stress is not a problem with this BMS.
@@OffGridGarageAustralia the 0,3 mO is also a factor to take into account I had not recogniced or would not have realized.
But 200A x 50V would mean 10.000W and 12W is not that big deal just 1,2 promille.
My 1000 kWh battery usage needs 1200 kWh feed in to get 1000 kWh out, which would mean 0,0012 x 2.200 kWh = 2,64 kWh for the pure BMS and on top of cause a bit for the operation of the balancing part I guess.
Have u attempted the cascading feature to use 1 device for a 14s 7 p, configuration? multiple strings in parallel??? 1 device! i am having difficulty understanding the wiring schematic in the manual. Have been looking for a couple of years now; on youtube, and no one else has shown how they do it!!!!!
No, I haven't done this. But a 14s1p is not different form a 14s7p form the BMS perspective. All parallel batteries are just one battery for the BMS.
Hey, you said you can't use this BMS with 12/24v, Why can't I make a 12v 500ah pack with 20 cells using this BMS?
Love your vids, very informative!
Cheers
Considering that 2 x 7awg cables have a maximum amperage of 30A x 2 = 60A how can it hold 200A in charge/discharge?
I have the same question. This is very strange for me. Does anyone ever tried to run this BMS ant max load? What is going on with the cables?
谢谢你选择JKBMS你讲解的很好
Looks like a Solid Unit!! NICE!!
I really like it so far. Doing the balance test right now and it looks sweeeet!
why no videos joe
@@ambersmith6517 Work has been super busy and I have been worn out to do much of anything. I am editing a video meow tho!😆
Andy JK BMS have 4-8S versions of that same bms for around a $100 bucks on eBay I believe
JK BMS really really good balance features, but with inaccurate charge and discharge value, almost 10A difference.
i was laughing so hard when you pulled up that diagram with the 5v battery..like what?? lol
I would like to see an actual test of this BMS connect to inverter RS 485/can bus with more than 2 same BMS.
Yes, me too. Seems like I have to do this test at some stage with my the battery banks. But not connecting it to an inverter but the Victron system for monitoring purposes. Inverter connection makes makes no sense in my eyes...
Finally one bms to rule them all!
With some restriction in terms of 12V and 24V packs...
@@OffGridGarageAustralia give it time.... just give it some more time =)
I am using the LTT version of the QUUC. It has the black internal relay. The application is a 48V golf cart. I have LiNMC batteries in a 14s configuration with 135A. I also have 300W of roof top solar feeding a Victron 100 20 MPPT, a Victron BMV 712, and a built-in 15A battery charger. The BMS has been an absolute nightmare. I think it's defective. I cannot figure out how or when the relay works. I have ordered the JK BMS.
Andy, sorry but something you don’t tell us amateurs; what does the 24S mean in the BMS title?
The BMS can be connected to up to 24 cells in series.
A 12V battery consists of 4 cells 3.2V each. You put them in series and reach the 12V nominal voltage. That's a 4s system, 4 cells in series.
@@OffGridGarageAustralia makes sense however I presume that the 24S means you can put any number of cells up to 24 but doesn’t have to be 24?
Hi, one question. Do you think you can connect this JK BMS to the Victron GX device via CANBUS?
The start up procedure defines the difference between a car alternator and a tractor or small air plane generator!! Bazaar.
Does JK have any of their new BMS supporting 4S setup? What would you recommend for a 4S Setup otherwise?
No, the new inverter BMS is only 8s-16s.
For 4s, go with the older JK-BMS. It's the best on the markt still.
Hello 👋
Good video i wonder 1 thing, why don't you balance under 3.4 v ?
Thank you sir
can I connect in parallel two JK BMS (8s 100A)? I have two battery packs, 24v each with JK BMS. One battery pack contains 8pcs cells (3.2v).
Yes, you can parallel as many batteries as you like as long as they have the same amount of cells, chemistry and each battery has its own BMS.
Mitechguy at Treeline power system says to hook a 9-volt battery momentarily between the B- and the black lead to turn on the b m s.
Looks like a Heltec BMS to me. Just FYI, most FET based BMS will let you turn charge and discharge on or off (including the Daly). Good video, not too long. You should try your four wire tester and measure the resistance for the balance wires. The best part is no extra wires for active balancers.
Thanks John. I think these BMS' are sold under different brands but are all the same JK tech under the hood.
I filmed a lot more and tested other functions but cut it out due to the longish video already. Well, there will be more following soon 😊
@@OffGridGarageAustralia Yes, I just called it a Heltec because that is what it was called when I first saw one reviewed about two years ago. @Up North and Personal has one, and yes, I think it is one of the best FET based BMS. I like relay based BMS, but you have to have two relays, so you don't disable discharging when it is full. Then there is the problem of finding a reliable relay that doesn't draw too much current.
I'm planning to buy the 200A/2A jk bms with rs485 for my battery pack, just waiting for a couple videos/reports on how they perform (are they really as perfect as they sound)
Yes, the JK is very good. Most people use them these days for batteries from 4s-16s and beyond.
@@OffGridGarageAustralia I will buy 16 Eve 280Ah cells.
I am just unsure about the whole Minus-disconnecting problem with victron, I already blew 2 cerbos because I managed to create a rare special condition
Hey Andy-
I bought 16 280 Ah cells and the BK BMS with 2A active balancer. I have a quick wiring question, hope you can help. For a 16S configuration Is it true that the number 16 pin, 24 pin, and B+ all go to cell #16's positive terminal? Or was this RUclipsr confusing #24 wire and the B+ wire? I don't understand why #24 wire needs this. Seems #17 through #24 wires should all be removed from the connector. Just #16 and B+ wires should go to the last cell. Please clarify.
Thank you.
24V is a sweet spot for everything. I will place multiple 24v 1500VA APC UPS for the AC current, and switch 1 or more off when AC back-end is not in use.
I like 24v as well. Low enough to be safe, high enough to not need ridiculously huge cables, low enough to be able to put twice as many banks of cells in parallel (compared to 48v), high enough to be efficient enough for my needs, low enough to not turn off my panels on cloudy days...
I will have this one working with 24V soon for you guys...
@@OffGridGarageAustralia Oh you saved my day ;-) !!! BMS looks really good yes, 2A could work with big cells, I believe there is a JK BMS RS-485 Raspberry solution, and that is really required for me. I will order a 100AH pack, more then enough for me, I have problems with the cycles, with clouds you can make easy 1 full cycle a day, 10x to 90% is 1 full cycle, now cycling with AC power, so a cloud AC -> DC converter steps in for the AC network. There is some loss but battery's are also -30%
On a 100A Daly 8S BMS, I had to short circuit the battery negative to bms negative to wake it up. Wear safety glasses, better yet just use a resistor to do this, or you'll get a big spark like I did...
"My Chinese is a bit rusty"
Andy we are very happy that it is what it is! If your english was rusty we would have had some real trouble...
I can always switch to German 😂
I'm not speaking any Chinese at all btw...
@@OffGridGarageAustralia The german is totally acceptable.. (to my anyway.) I am Afrikaans and it was a subject in school.... many moons ago
Does using a BMS with active balancing negate the need for top balancing when building a new battery pack. Wouldn't the BMS top balance the cells when plugged into a charger?
Hi Andy, great channel. Slowly making my way through your EVE cell/JK BMS videos. I was wondering if you have made any progress with enabling the CAN/485 interface to control Victron CCs and Multiplus IIs? I know you have the Rasp Pi, but like many others I have a Cerbo GX. Do you think the Cerbo will work with the JK at some point? Keep up the good work!
Be sure to ask them if those BMSs can be run in parallel, as some cannot. I am sorry to here that you are going to run two parallel strings, as the link I sent you clearly stated that it is better to run 32 cells in groups of 2 cells in parallel. The link I sent you, that you verbally spoke in one of your videos, ended in "Done!", in an effort to jog your memory. I am still a fan of your big solenoid BMS with that 4 amp balancer that you reviewed a few days ago. Thank you, thank you, thank you Andy for all you do. Your videos are the ones I look forward to most of all RUclips channels I am subscribed to.
No problem using these in parallel. I've been doing that for over a year already with this BMS.
Thanks Aaron, much appreciated. I cannot see why you should not run as many battery banks in parallel each with their own BMS. The BMS' wont fight each other or interfere in any way...
I thought over the built in vs the external active balancer I decided the separated route is the better choice.
This 2 A version is. more than twice the cost if i buy the o.6A JK version and the 10A dedicated active balancer . Well it is a no brainer that i take the latter. Sure there are more wires and 2 things to deal with but so what? I do not connect and disconnect all the time and honestly dedicated device is alway better than combined device.
I have 18650 built pack for 14s100p so they are always out of balance from day one as they came from recycle battery of laptop and tablet. Way more challenge and complicate to use than the lithium phosphate type. I need that 10A active balancer to quickly balance the cells in both charge and discharge mode.
I noticed two more things:
1. At 4:34 you show that it has a Coulomb Counter! So, no more need for a shunt?
2. At 20:14 you show that you can enter the wire resistance for the sensor leads. DMI INC (in another thread) suggested that the resistance of wires (and terminals) could contribute to shunt "drift". If you're pushing 2A though long skinny sensor wires, I could see how that would be possible, and it's awesome that there's now a way to compensate for it!
I have to see how good the shunt is. The Victron smart shunt integrates nicely with the Victron gear. To integrate this BMS, it needs a bit more tweaking. Brad is working on a solution...
Happy Easter from Canada Andy. With the Easter theme do you worry you will have all your eggs in one basket with the huge BMS. Could you not have two half banks with a switch to transfer either one in the case of a problem with the other.