NEEY - Smart Active Balancer for Li Batteries. Is this what we're looking for?

email from youtube hi offcut garage we wanted to let you know that our team reviewed your content and we think it violates our sex and nudity policy what the f [Music] nice welcome back and good morning here from the offcut garage in australia we have 2.7 amps outside it is still early but i'm sure we will get to the 50 amps outside today again well have you seen me last night what do you think i have done [Music] i've taken out all the balance leads from the active balancer and i put new different balance leads in we have a different balancer i would like to test and i'm very excited about this because this could be the solution to the problems we had before if you remember videos ago i told you i have taken out the active balancer because it causes an imbalance the active balancer is always active it is always turned on and is always measuring the voltages of your cells all the time even at the lower state of charge medium state of charge it measures the voltage and balances as soon as it detects a difference between voltages it starts balancing so it actually causes an imbalance in your battery and when you charge up again to a higher voltage you could see the deviation across your cells so we came to the conclusion it would be good to actually turn off the balancer at lower state of charge or medium state of charge and only turn it on at a higher voltage higher state of charge so it can do its top balancing again and keep the cells at the top in balance and people have come up with all kind of solutions and thank you very much for your hundreds of comments on these videos high voltage measurement relays connections or just um a manual switch on the outside of the box where we can turn it on and can turn it off from time to time all these sort of solutions now um i've got the other bms here and i'm really really happy to show you the knee i don't need nay can they not call this one like peter so we can pronounce it now it's the knee knee let's call it knee it's a smart active balancer four amps accuracy one millivolt and the battery strings you can connect to it is 2 224 s so this one can balance a 2s or a 24s battery it doesn't matter it's the same device all kind of lithium batteries lithium ion lithium iron phosphate ltos and power supply 25 to 100 volts now this put me off a little bit actually at the beginning but it is only necessary if you have under 10 s configuration so it needs at least a voltage of 25 volts to operate properly that's just what it is um we don't need to worry about this with our 16s because we are far above these 25 volts already so um and i put all these specifications here on the screen so uh 224 is all kind of lithium batteries uh here it says it here if the battery pack voltage is lower than 30 volts external power supply is ah required so the operating voltage per cell is one two four point five volts accuracy one millivolt this product is calibrated with the k k k three d m m seven five ten wow that's pretty good right i don't know what that means it's a patent balanced architecture flies across capacitors to achieve efficient balancing in conjunction with point-to-point energy transfer algorithm that sounds really good right that sounds good they sold me already on that and here comes the thing this bms comes with an app so we i've already installed the knee app i have not connected the balancer to the battery yet i want to do this live here on the channel i really live when i've got the camera running i want to see my reaction so we should be able to program and configure and change all these parameters we want and as i said before we can also program a turn on voltage so we can tell the balancer to turn on if one of the bat results goes over 3.5 volts for example then the balancer will kick in and this is exactly what we want from a balancer it only should balance at higher voltage high state of charge not all the time you don't want that okay this is the standby current of the electronics 10 milliamp when the balancer is off and 25 milliamps if the balancer is on and operational the dimensions are here and working environment temperature minus 20 celsius up to plus 55 celsius okay and guys i must say look at this case here this is very very nice built obviously a custom built plastic case here but very nice and we also have three leds here so apparently we have a blue led here for bluetooth a yellow one for fault and a green one if it is balancing and in the app we should be able to see how much current is going from cell 13 to cell number 25. i don't have to sell number 25 to cell number 15 for example so i'm very keen to see what's going on with this bms well the bad news is i have to go somewhere and help someone with an inverter here in this area i will be away for probably two or three hours or so we've got uh 8 40 now i'm late already but the battery is only at 73 percent so until i'm coming back we will have full sunshine here and hopefully we will charge the battery down to 100 or close to 100 and i probably set the voltage a little bit higher so we can see a higher deviation across all the cells then and let the balancer do its job for the very first time knee yeah it has to wait until i'm coming back all right see you in a couple of hours five hours later i really don't want to talk about this but when i um when i tightened all the nuts again on the terminals um one of them was a bit like soft you know when you tighten it and it doesn't really tighten i i don't want to deal with this right now i just don't hope it's something i'm not touching this terminal anymore it's cell number six positive terminal not touching it anymore until we take the whole battery apart until this one is in place and operational not touching it anymore don't even look at it don't even think about it no comments and of course it's 2 30 2 20 now and we're already floating for a long time for almost two hours now we are in float mode 53.6 98 we are again 98 and solar only supplies power to the load but this is not of concern today we are going to install the new balancer so let's see how this all works and if it works okay yeah don't even look at number six at this terminal there don't all right we've got two balance leads plugs coming out here one is 13 pole the other one is um the rest and i guess we just plug them in i don't know which order i have checked the cables as well i'm not sure if you have seen this in the timelapse yesterday so i measured everything from the negative all the way through to number 16. and the special stuff is here now we've got these cables here not connected at all so you can see all these cables here they are not connected we've got number 14 15 and 16 then all these ones are not connected and the most positive goes the same as the last one here in your row the yellow one so yellow and red are connected together to my most negative most positive okay let's plug them in i go only one way in let's do these ones first and hope for the best all right it's a bit hard to get in actually but we now have a well a blue light flashing for the bluetooth and this is a yellow red one i would say it's red and there's no yellowish light here scan ah here we go that is popping up okay cells okay we've got 16 cells set up beeps confirmation start voltage 0005 maximum balance current 4 amps okay we should set this one here to 3.35 right this is our float voltage sleep voltage this is when it turns off so everything below 3 volts turns off the balancer battery capacity 280 set battery type lfp set buzzer mode shut single loop we leave it as it is for a moment we can set alarms this is all success success line in resistance detect alarm success success setting is inconsistent with cells okay oh minus four amps it does so down here we can see blue and red red one is high the blue ones are is low so the balance current is 4 amps it claims up there the voltage difference is 4 millivolt only so what i will do now is i will increase the float voltage of our battery here because we are floating at 3.35 only going to the west roof charge controller and we just increase the float voltage to 55.2 just to see what's happening so the charge controller should now turn on again setting is inconsistent with cells it says still ah start voltage three point three point four volts reset right range error or is this like zero 0.001 ah this is our deviation we can set okay okay okay what is it doing now okay let me have a fiddle with this and i'll get back to you soon just need to find out what's going on here with the settings 10 seconds later all right guys this is very interesting what this bms or balancer it's not a bms it's a balancer does i could actually measure the four amps here going into this um cell number 13 here but now cell number 12 is the lowest so we have to move our thing across here see there's zero at the moment yeah four amps going down again so what it looks like it does it it boosts these cells just for a moment with four amps and then stops again to measure the voltage if they put four amps into this one cell they have a huge voltage drop on these thin cables here so they are boosting the cell with four amps for a moment take the amps off measure the voltage again for a moment and then boost again if necessary that's how it looks like it works it seems like it's doing this across all cells that means if the highest one is number 50 in here and the lowest one is number six it sends the energy across directly it's not passing on the energy to the ejecting cells it's passing on the energy directly to the cell which is low that is very interesting and we already down to 18 millivolt deviation at three point at 56 volts which is a 3.5 and it looks like it's only discharging the red the red cells here at the moment and then gives this energy into number 10 for example now 17 definitely coming down it says up here 4.4 amps for 0.1 and cell number 11 again i have set it to 5 millivolt now deviation at 3.5 volts but it seems to work yes i know now number five is our lowest again see if we can see something here a little burst alright it changed to number 10. i'm not changing staying here until number five is coming there goes just for a moment a burst and then it measures the voltage again this is what's going on we can see the deviation is down to 14 millivolts now it's coming down and i would say give it give it a couple of minutes maybe 10-15 minutes and we will see what is happening at 3.5 volts here that looks really interesting and we can really measure the four amps all right and now after 10 maybe 12 minutes we are down to one millivolt deviation that is insane how quick this went and we are still at 56 volts which is 3.5 percent and look at this 3.5 they are just over 3.5 volts and let's have a look at the bms here well this one shows us four millivolt deviation but look at this 3.5 okay let's program the solar charge controllers to go a little bit higher and see if this one still works then that is insane okay 3.55 times 16 56.8 56.8 float voltage is now higher than the absorption voltage that's fine it works so they will open up and we'll increase the voltage now to 56.8 that is insane how quick this went we had like we had like 40 56 millivolt deviation at the beginning when i started this was probably half an hour ago and this was like uh 3.4 volts and now we've increased the voltage and they're already balanced that's so quick that is cool okay i probably now i'll leave the settings as they are so one millivolt deviation and we just watch what happens 56.1 it's increasing now you should turn off my charger here right it goes a bit quicker then so and after another three minutes we have reached 56.8 volts charging with 0.4 m so almost nothing and 2 millivolt deviation that is insane okay let's go higher uh 3.6 times 16 57 57.6 57.6 okay let's go back in one millivolt deviation it measures it is a bit different to the bms app which shows us four or five millivolt deviation but you know we are not fighting about four or five millivolt deviation at 3.65 volts you know okay it's increasing the voltage now charging with 2.1 amps that's all i get full shade here on the garage in the afternoon but there's no cell running off nothing yeah we can see it is still pushing four amps across single cells that is amazing because usually um these um these balances here they are dependent yeah well this one is um these ones they are dependent on the voltage difference across cells so the higher the voltage difference the more current they are pushing but this one here seems to push 4 amps continuously regardless what the voltage difference is even at 2 millivolt deviation 4 amps bang and this is perfect for these high capacity cells look we are increasing the voltage all the time now we are still charging and you can see it we are still charging and the deviation is not going anywhere else it's staying at one or two millivolt that is insane three point five nine we have three millivolt deviation it measures all right and we are now at 57.6 volts which is a 3.6 percent and the balancer is amazing two millivolt across all the cells it is still balancing because i set one millivolt well you would normally not do that but it is for the testing purpose it is still trying to balance everything out look how close they are together two three millivolt deviation it shows us here insane all right next step would be to go to 3.64 i don't want to go to 3.65 because all my devices will freak out here so i go to a 3.64 usually one of the cells peaks and i need to go there various in very small steps very slowly to make sure the balancer has enough time to um get this voltage down of this one particular cell then but in this case with this balancer pushing four amps uh really i'm making a video here okay 3.64 volt is 58.24 okay let's go back in so the charge controllers are kicking in again charging with three amps to 3.64 volts and we have now reached the 58 really okay we have now reached the 58.2 volts charging has stopped zero zero amps zero watts going in so it keeps the battery at this stage here i've turned off all the load nothing can disturb us and we are still at 2 millivolt look at this huh is that good these are actually the guys from the hangsaw store where we bought all our balances here so they got in contact with me and said well we've got this brand new bms here do you want it and i said well hell yeah i want this bms so i bought it but it is doing a fantastic job so we are now at 3.65 3.644 volts look at this and two millivolt deviation just cross checking here in the bms app three point six four six millivolt four millivolt okay let's do a test get the light bulbs and we will discharge only one cell now very very heavy here with these light bulbs they pull like 30 amps or so just one cell bring it totally out of balance and see what the balancer does there we go okay so you can see um watch the number 30 in here on the bms always say bms it's a balancer on the balance on number 30 and this is what i'm going to reach our discharge geez i cannot talk today no this is actually not good yeah now so i've got my clamp meter around the balance lead going to in cell number 13 and we are at 3.643 volt at number 13 and i'm going to discharge this one now heavily with these light bulbs here there we go voltage should drop yep okay so let's see when the balancer puts some energy into this cell here 3.57 we are down still nothing going into this cell i wonder why it is blue on the app there is four amps turning off for amps turning off measuring four amps turning off four amps measuring that is pretty cool that's such a good system because otherwise the voltage measurement would be off but now it has stopped okay let's stop discharging this one cell so we've got a deviation of 181 millivolt now i wonder what it does in between these measurements and sending power to this one cell because at the top it always says it is balancing with 4 amps 4.1 4.2 m sometimes but we don't know from which cell to which one it goes but yeah deviation comes down definitely and all the other cells are above 3.65 volts now just a tiny bit i wonder if i measure this cell number 12 if it pushes the energy from cell to cell let's see what this one does if there's current going you can see this on the app here 3.652 it has there's the 4 amp yeah it is just flicking red on the app and then we can see the current actually going out of this cell let's watch number 12 again on the app and here on the screen there it is yep you could see it it's red and then it gets discharged by three point four amps but even now it does it and the cell is not read highlighted in the app again nothing on the app well it could be that it pushes the energy through through all the cells until we hit number 13 here it could be the case it's very hard to tell okay let's measure here number 14 for example just number 14. and see if this one pops up at some stage i'm trying to figure out how this works well guys the uh smart chunk still says we are charging with 0.6 amps into the battery from the solar charge controllers so very low current going in but we can see the voltage is actually rising in cell number 13 again so the balancer is balancing and pushing energy into this cell i just don't know from where this one really pops up because we are at number 13 there's only 14 15 16 afterwards but there are actually more cells on the lower side of number 13 well there are 12. so i wonder if it pushed the energy through through all these cells then until it reaches number 13. could be the case and there's pretty much nothing happening here on this side but here number there are four m's just saw it again this is number 12. okay this is on my list of questions i will ask them how this works because we can see these red numbers flashing across the app here and i thought it's taking the energy from this particular cell in this particular moment but even if it's not highlighted in the app we can see the four amps like now number 12 is not highlighted but still it's pushing there again pushing energy through and it might be that it uses all the cells in a chain to push the energy all the way through to all the cells until they hit number thirteen oh shut up here 108 millivolt deviation we have but we don't have any runaway cells charging with 0.3 amps only but number 13 is still rising there's number 12 highlighted now but there's nothing on the screen here ah i pushed it on hold ah you need to find out how this works really they are four amps into a number 13 and voltage is rising 3.55 we have already that is nice and all the other voltages have come down look at this we are all under 3.65 volts it is balancing 100 millivolt deviation still okay leave this running for a while and see if we get down to under 5 millivolt again it is interesting and we are back on the battery here after 20 minutes deviation in cell number 13 three point are not deviation voltage 3.64 volts pretty much in line with all the other ones deviation is four millivolt five now we're still pushing energy in from time to time you can see the four amps popping up here so it's still doing its job there it comes there was only three or something there is four four amps just for a moment and then it measures again three point six four three volts now two millivolt deviation we have i was just in contact with the um support over there and um hank so the hanksaw store is sending me a different app now they are still developing the app and they will send me one via email now i'll put this on my phone and see if it works i have discovered a couple of bucks inside this software i've sent them the screenshots and everything and they send me a new app now i'm impressed i'm really impressed with this balancer it balances with four amps all the time regardless of the difference what's going on here is the cat somewhere there ah that's chasing the big bird there the crow right yeah they don't like this now really the the bms the now really the balancer balances with four amps all the time regardless of the voltage difference across your cells it pushes four amps into the battery weights measures pushed four amps into it measures and so on so as you can see here two millivolt again at 3.65 volts almost so number 13 is now in line and number 15 is now the lowest one after 20 minutes maybe 22. so i'm really really impressed and i have also confirmed here the sleep voltage this is your turn on voltage of the balancer so if you set this one to a 3.5 for example the balancer will not balance under 3.5 only if you charge high up to 3.5 it starts balancing then and this is exactly what we want this toasty here balances all the time which causes imbalance if you haven't seen my video it is linked down there if i don't forget okay guys as always i have this balancer linked on my website link is down below under the video here um feel free to have a look it is not as cheap as these toasties here but it provides a lot more functionality fully programmable programmable it shows you all the parameters you can set a turn on turn off voltage it pushes real four amps regardless your voltage difference what else well it gives you all the information here it just works it just works i'm impressed that is really good it is a bit more expensive though i think i paid like 100 i paid already close to eighty dollars for the normal balancer here and this one seems to be working as we want it alright guys as always thank you so much for watching thanks for all your support here on the channel especially for all your donations and using my referral links on my website this is always a great support here for the channel and until the next video guys stay charged stay safe and thank you again for watching see you then bye you

Channel: Off-Grid Garage

Views: 14,861

Keywords: DIY Solar, DIY solar battery storage, DIY battery storage, how to build your own powerwall, beginner solar battery, off-grid solar, DIY off-grid, off-grid battery, off grid solar, off grid battery, off grid garage, off-grid-garage.com, Hankzor, NEEY Smart Active Balancer, Active Balancer, balancing battery

Id: sdPlRgtuawY

Length: 31min 19sec (1879 seconds)

Published: Thu Sep 23 2021