Wiring Tesla Battery modules Active Balancer
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- čas přidán 13. 09. 2024
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Just wondering: could you not have used one balancer per 2 Tesla modules (so 12s) instead of one balancer per module (6s). Means half as many balancers required? Or am I missing something (only at the design stage of my future large system so I could be wrong)
Cheers :)
yup running like this (one balancer per module) is not the best way, one balancer could balance to different voltage than the other one and now you would have an unbalanced pack due to balancers
Brother if you take a small flat head you can push and pull at the same time and tho's wires will come out. Then you do not need all them wires and no need to cut. If you need you can reuse them..
I was just poking around how to treat these batteries and learned that although you want to keep them in the mid-range state-of-charge especially staying away from the higher percentages for longevity it is still recommended to occasionally bring them to 100% or 0% so the BMS can more accurately balance the cells. The reason is stated as this: With LFP batteries it is only practicable to balance at an SOC close to 100% or close to 0% SOC because this is the only time the individual cell voltages are far enough apart from each other for a BMS to accurately measure the difference in SOC. Which would explain why bottom balancing is better than top. That way higher-capacity cells are kept at a lower state of charge. Otherwise they would needlessly be at a higher state of charge where they would degrade faster.
I have gone over this info in my other videos even when I had my other batteries. Did you see those videos.
@@ModernOffGridDIY I think I've seen the last one and a half years worth of your videos but I don't remember this particular point so maybe I missed 1 or it was in an earlier video. And all this had me thinking the beauty of the active BMS is you can top balance if you know a cloudy week is ahead. Then when your batteries get near empty the bms would take power from the higher-capacity cells and put it into the lower capacity cells enabling you to get more kilowatt hours out of your bank before it goes dead.
@@SiriusSolar good stuff buddy
These aren’t LFP. NMC can be balanced throughout the voltage range but you’re right about trying to avoid balancing in the middle and why bottom balancing is superior when it comes to getting the most out of your pack
Hi modern offgrid diy, nice video and a lot of kwh's.
Tried to visit the site but after disabling all the cookies (ggrrrrrrr) i did end up at a use,ess site.
Can you send me a link to this active balancing units?
Active is the way to go but there are very little ones that do the job well and reliable is my feeling
It’s been a while, how’s the system running? If you had to do it over what would you do different? Also, can’t find those balancers, do you have an updated link please?
Yes sir. System is running great. I wouldn't do anything different its working so good. The Balancers not sure where to buy them now would have to look around. How's things with you.
Do you connect the battery temperature sensor to the active balancer? What’s the difference between balancer and BMS?
What a mess of wires... good info good video :)
Hello. Great work. Can you please tell me the name of the connector pins that you used to connect the battery to the balancer? Thank you
Hi, Im building a Tesla battery pack 18S. And Im using a DALY 20S BMS. 1st Question- the only Black Balance Lead goes connected to the negative terminal of the battery pack or to the (-) connection of the Tesla battery thru board installed in the battery with the farthest negative connector of the battery pack? 2nd Question is what shall I do with the last 2 leads from the BMS, cut them?
Aloha, bad link. Please update or tell us the model number of your BMS. MAHALO
Yes company that was selling them went out of business back when covid 19 hit
Hello,
This is a great video.
Please tell me the 2 main chips in the Testla board if possible.
In addition, Can you talk about what plus point of your module balance than Testla board?
Holy cramp this is awesome
Hi there, great video. I also have a question on the number of balancers. You are using a 24s balancer which means that two is more than enough for the build. Is there any reason why you are using one balancer per battery?
Yes. I like redundancy just in case 1 stops working I always have extra to fall back on.
He is running a 12S system, so one balancer can hook up to two Tesla packs. If you cross-strapped the B1's across all the packs, up through B11 independently, all of the Tesla packs could run on one balancer. Cross-strapping would put the 76 parallel cells in parallel with 76 or 152 additional cells in this system. Six balancers in this configuration is just additional expense, without redundancy.
Bro your video was the best I've seen very easy explanation 👌
Can you use the other open red wires on one active balancer for two battery modules? Meaning b1, b2, b3, b4, b5, b6, the b7 to 1, b8 to 2,... ?
i went with Jack Rickard EVTV BMS controller, it works great and no modification. Plus you only need one BMS controller and you can go up to 65 Tesla Modules. Just get the Can wire harness they sell.
Cool. I considered them but I did not like the Clunky interface. Just was not my cup of tea. But if its working for you thats awesome.
I looked into them but they are expensive!
@@efraseleman55 i agree with you if you got only like 1 or 2 modules, but i got 8 modules and possibly more later !
Using that balancer do the cells have to connected in sequence cells 1,2,3,4 to the board or can it be connected in any order 1,3,2,4?
I would assume as long as you hook to the right place you could hook in any order.
Howdy! I love your work, videos, enthusiasm and insight! Keep up the good work!
Question: I recently bought 4 tesla smart 57v batteries for off grid solar. Im using an outback flexmax 80 which has the thermal sensor and other safety settings(max charge etc) Im using an sma sunny island inverter which has a temp sensor as well as settings for low power shut off etc. i feel pretty safe, but want to add bms for extra protection. This looks like the one for me. I bought parallel boards to connect all 4 batteries together for balancing, but maybe instead i should get 4 separate balancers like you have here. Balancing all 4 big batteries with only one small balancer may be too slow/unsafe...? It sounds safest to have a bms that can interrupt the large power cables to/from inverter/charger, but that seems tough to find (some large relay controlled by the bms etc) i see this balancer can pull power to bring down overcharged cells. Will this, or another solution you know of, disconnect bad cells to help prevent fire? Up until now I’ve been using FLA with the most caveman rig possible and its been flawless, safe & cheap but not so efficient. And advice is greatly appreciated.
I would recommend using separate bms or balancers to me much more safe plus if one was to ever stop working you can wire that pack to the other bms or balancers. Here's the link where I got mine works great. activehomeproducts.com/products/1a-2a-active-equalizer-battery-balancer-high-current-bluetooth-display-app-2s-24s-bms-li-ion-lipo-lto-lifepo4-lithium-titanate
Modern Off Grid DIY thanks!! I see they sell various models of balancer. It looks like the 16s type B is what I’d use for my batteries. My batteries are 15s groups of 22p (im pretty sure) also, what’s the name of the app used for monitoring them? Im hoping it’s available for ios...
Couldn’t find a link to the bms but found it on AliExpress
Where did you get the battery modules and how much did you pay for them?
Nice setup, how did you mount these batteries to the wall?? thanks
Actually I came up with a Unique way. I'll make a video on it for you.
@@ModernOffGridDIY Sounds good, looking forward to it. Also, which version batteries are yours? I know tesla came out with a bms board with different plugs, just curious if that bms you are using with work with both. thanks
@@ModernOffGridDIY Any tips for mounting them. I'm ready to move forward on my project and need some idea. Thanks!
@@ModernOffGridDIY I would like to know too thanks.
@@ModernOffGridDIY Checked your videos and you've not shown how you've mounted them yet have you?
Where did you buy the male connectors for the active balancer?
That was cool broooo🤓 and the batteries on the wall is perfect really great sir😊.
Hello, can I just use one BMS that is capable of 24 cells for four battery modules in 48v, why you use one for each module?
There's 6 parallel strings within those modules. Those parallel strings need to balanced. Therefore you need 1 BMS per module.
Looking for balancers capable of this. I noticed your link is down. Any recommendations for Battery Balancers?
Hi
Have got a few questions relating to the following ?
What’s the best and safest charge rate ?
What’s the safest configuration for your cut of charge ?
What Volts should be the lowest possible on the modules at 48 volt ?
And the highest charge ?
Thank you so much for your time
You are doing a great and wonderful thing here
Thumbs up
These packs have a tremendous capacity for accepting (and delivering) charge. It's basically impossible for you to charge them too fast or discharge them too quickly (besides maybe a full short which would be very bad). They are rated at something like 500amps which at 50V is ~ 25,000kw. That's a huge inverter or a very large diesel genset.
@@MichaelSchwabTX i have discharged one of this module at 100 amps and battery got pretty warm so I think 500amps would be too much for these modules
@@greg23842384 they are rated at 750 amp if watercooled
How much input will you need to heep the battery pack charged?
Great work ❤️❤️👍
Hi any help I bought Tesla model 3 24v. 5.2 kWh how to wire 6s active bms 1.2 balancer
Howzit bruh? where did you get the tesla batteries? You stay on BI? Thanks!
sorry for my question, but how do you control the on and off of the battery with this balancer. the BMS normally turn of the battery when it get the to the numbers. do i have to set it in the inverter? i have a different type of battery, like the nissan leaf installed already. does are 48v but it set it to go to 54v top and 46v down. i dont think that the tesla can handle the same setting. i think in that case i need a BMS to handle the charging situation on the tesla.
Where did buy the battery? Let me know thanks. Aloha from Oahu.
Hi. The batteries are in 48v. How much voltage can you charge them. Because I want to star my tesla bank. Thanks.
What bms is that why did you did not list it who on watt is useless booking information
I am just curious. Why do you think the original Tesla BMS is inferior to an aftermarket BMS? Why not leave the Tesla BMS board in place and use a BMS controller like the SimpBMS to control them all?
Good question. He didn't address why the ones he removed didn't work out for him.
They require tesla cambus activation as far as i am aware (unless they don't but most videos I seen everyone replaces them)
Why not use Simp BMS? You can use original slave from Tesla
Cost. Nothing wrong with the Simp BMS but it does eat the pocket. A cell tap board can be bought for $30 and then it opens you up to a lot more affordable options for a BMS.
Why not use the stock built in active balances ?
Awesome
So... I went through all the comments, because the links are not functioning, and no clear mention of the BMS is mentioned. Can you provide information on them, please?
Website closed when covid 19 hit. Many companies closed because of the outbreak.
Does that mean the company that manufacture the BMS in your video is the same company (linked url) that sold them?
I dont know, I'll have to look around for it, be careful lots of fake stuff out there. Im glad I purchased extras for my System just in case I would ever need to use them I have them. Should have purchased back when the company was open there where great but this dame covid 19 stuff really hurt lots of companies. Sad.
My battery pack Is unbalanced and now the car wont give me more than 35% of its capacity, thats the dealers diagnostic, i have a jac esei1 2020 and i live in México, the dealer wont give me supoort and right now i dont know what to do to fix this issue, maybe you could help me? Maybe u know someone of your partners that live in México and could help me? Please.
I have a 3840 ah battery im looking for a bms my batterys ar lifepo4 wat do you recommend 🤔
Good structure
I just got my first Tesla pack. It didn't have BMS.. so what color wires are what? As far as number one so one so forth
1. Brown
2. Red
3. Orange
4. Yellow
5. Green
6. Blue
I have one of those balancers for 48v system, and they work great...but they are quite expensive if you buy that many..did you get some kind of a deal?
No deal wish I did. Just helping others find the things they need. I don't ask for deals from anyone the money is not a big deal for me. Small price to pay. I am a local business man here in Hawaii I'm blissed I make good money. Hard work pays off.
Greetings, why did you swap out the other Tesla batteries? Did you have trouble with them. I opted for the 7s config because I have a 24 volt system. The 6s just seems a little low for a 24 volt system. If I had a 48 volt system the 6s is a much better deal. Just asking. Thanks
I had know problems with the other batteries someone made me an offer and I sold them he really needed them so I was glad to help.
@@ModernOffGridDIY that is good to hear. I have been charging my Tesla batteries to 4.04 volts per cell. Do you recommend less than that? I thought its is sufficiently below 4.2 volts but I think a watched one of your videos where you charge to 60 volts. In a 16s config that 3.75 volts per cell.
@@offgridinthepacificnorthwe3210 other batteries was 15s the batteries I have now is 6s. If you stay 1 volt below the top your good to go.
Just remember that you'll occasionally want to bring them to 0 or 100 percent state-of-charge dependent upon the type of bms where the BMS can more accurately do its job.
@@SiriusSolar what is the advantage of doing that. I had understood that Lithium Ion does not have a memory or the need to stir the electrolyte like a FLA. Am I missing something?
Can you send me a diagram on how to hook them up I bought me a ranch and i want the same system you have
Hi, I am a newbie and would love to build a system similar to yours. I have never done it before. Do you offer your expertise to help or do you have a complete list of items required to build a system like yours. Thanks. I love using Tesla battery for my house.
Check the description I offer 1 on 1 help if you can't find the link let me know and I will send it to you.
Good morning. I have a question for you. What's the voltage on your system? And what are you charging them to? Because I'm thinking about getting some.
Tesla S3 cells like this have a terminal voltage of ~24V. With 2 in series he has a bus (into the inverter) at about 48-50V when topped off. At full discharge it will be around 39-40V.
@@MichaelSchwabTX thank you for the information but you got them too long so I got lifepo4 and it seemed to work really good
What is net weigh Tesla pack
I think it is totally not necessary to install those Active Balancers at all on your Tesla battery module of 5.3kwh block!!!
What you need is BMS only?
You know why?
You did not couple each block of 5.3kw by yourself by getting different tesla cells to build the block by your self. If you had done the pack by using different cells then you need active balancer.
Active balancer is not BMS so you still need BMS there. If not you will damage the battery.
What you have there now is only an Active balancer with no BMS.
If i am wrong correct me.
How to mount to the wall? Can you show me how you mount the battery to the wall?
My batteries are still mounted to the wall but I plan on removing them to a different location hoping to do that soon.
@@ModernOffGridDIY Thanks for the reply: My question is How does it mount? Drill hole at the plastic or anything else? I can't find any way to mount it to the wall.
If there are 440 cells per module how does 16 modules comes up to be 85Kwh,400V max and 350V Nominal and how to determine the Range per kWh?
Also how are the cells arranged and what are those things that you called Bust Bars?
400V when SOC is at 100%
@@khan209i i have got an other one , if a li-ion cell is marked at 4.2V max 3.7V min then when can we say that it's empty?
3.7V is your min voltage that's we have BMS to measure voltage for each module if they are connected in series. li-ion cell voltage should never drop below 3.4V if it does then it considered dead
@@khan209i........ i am amazed by your incredible knowledge of electronics...... thanks man 😊👍🏻
What's the difference / pros and cons of the first set of Tesla batteries versus the set you have now?
Nothing really. Just Different voltage, the first ones was easier to mount to the wall.
@@ModernOffGridDIY I just ordered 240 kilowatt hours for a decent price but I'm not liking the balancers they have built-in. I may end up selling them and switching to Nissan leaf, Tesla packs or something more industrially large.
@@ModernOffGridDIY is it the same amount of kilowatt-hours as before?
Speaking of voltage those inverters that require 500 volt batteries are looking enticing. They're under a grand and they also have multiple mppt charge controllers built-in.
Close to it
Wonderful video as usual. Are these just balancers or they perform the function of BMSs as well?
Active balancer.
@@ModernOffGridDIY Thank you.
Can't i leave and use the custom bms that came with the pack?
No
Can I use a single 24v pack without installing BMS?
Sure you can but if you want peace of mind I would look into options.
you only need 1 bms for every 2 packs since you are running 2 in series. you just need 3 bms's in total to run all 6 packs. That would be the correct way to do it, you should not use 1 bms for every pack.
I understand your point on the matter. But they have all the same set points and have been working perfectly for years now. Plus I want to have redundancy.
Hi all, the Active Battery Balancer seems to be no longer available :( Does anywon know where I can get a Balancer/BMS for the larger Model 3 batteries. I have a full pack (4 batteries) and am wanting to replicate just as the video. I'm in the UK but I'm sure I could find a way to ship from anywhere :) My problem is I'm unfamiliar with this part of the equipment so am not sure what to look for on the Internet and when I do find something I don't know if it will do the job nor how well. Balancers/BMS's for S and X batteries are common but Model 3's seem rare so any help gratefully received. Thanks all
I'm not to sure you have to look at the battery voltage of the pack and how many are wired in series. The Tesla battery modules I had was 6s
I think I am more confused after watching this. LOL What do all those red wires attach to???
The small red wires are balancing wires. They attach to a circuit called a BMS (battery management system) that actively drains a small amount of current from cells that are slightly overcharged when the pack is charging. This allows those with a slightly lower charge to fill up giving you much more capacity. The problem with lipo (and lifepo4) is that ideally charging stops when the pack voltage reaches a max V. If you go beyond this without a BMS, some cells with slightly higher voltages will overcharge/overheat and cause damage . To prevent this, we use the BMS to bleed off some of the excess charge on those cells specifically allowing the weaker ones to top off.
Now, why are some weaker/lower in voltage than others? Heat and other factors play a roll in charge/discharge rates by effecting the internal cell resistance. This makes it impossible to always have them drain/fill exactly the same. Without a BMS a pack like this will quickly become out of balance and eventually cell voltages will go down lower and lower eventually even reverse charge. This is a recipe for fire, and does permanent damage.
NEVER run LIPO without a bms.
Gut 🤗👍 Super
nice, wish the price cheaper
Top 👍🤗
None of the above links seem to work...
Lots of companies went out of business because of the covid 19
How much price of each pack
Price per pack change all the time
I ordered a 2s to 8s unit for $14 now they are $28
That's cheap $28 is nothing. I own the most expensive model over $200 each. Well worth it thu. They offered a 48hr discount the other day you got it on a deal. I bought more solder tubes when they was running that sale.
Hello.
Please can you renew link to balancer? Thanks
Ditto. Seems the link is out of date.
Company shutdown global virus
@@ModernOffGridDIY Since the site is down is it possible to say here what brand these BMS are to find elsewhere? I've been looking at Dilithium, REC, Electrodacus, ZEVA and SIMP. Just looking for simple balancing and charger/load shutoff loops.
I also had problems with the link. Please give us an alternate.
👌
It looks like your bms can support up to 24s configuration and you're running a 12s setup(50.4 volts)... you could run that entire wall on 1 BMS, instead of 1 bms for each pack. please message me and I'll help you clean that install up! look at it this way, each module is 6s74p pack.(25.2 volts full charge.) 2(packs) in seris is 12s74p. and 3 of those in parallel is 12s222p. That is your entire wall, 12s222p. so you only need 1 BMS that can do 12s.
Also, If you have the money to build that system, why dont you spend the time and on the tools to pin, depin, and crimp new connecters. You can make new ethernet plugs, balance plugs, and so on. then you don't have unsightly wire joiners. All the connecters have a name and you can purchase the tiny metal pins inside them and crimp them onto the wires.
Joseph Kepner hell I can use your help.
@@fakeittillyoumakeit3370 pm me and I'll call you
@@highonahill I am stumped. I purchased a 10s BMS. I am hooking up 3 Tesla 24v packs in parallel. I know I need to have equal voltages before hooking them up. Which wires of the BMS should I hook to each battery? Thanks very much
@@AndrewRoberts123 it's sounds like you need to do a little more research and I need more information about your planned setup config. 3 tesla modules is not specific enough. Are you paralleling the packs or running them in series? Also 10s bms is pretty useless for either config.
@@highonahill They are the 5.2 kwh 444 cell units. They're going to be connected in parallel.