Hello Martin, I have been watching many many instructional videos regarding charging Li-Ion Batteries and BMS around it. But, none of the instructions were able to explain as elaborately and as the simplest way, you have explained. Your teachings just went into my brain and I could understand the basics of charging the above cells. You are a great Teacher. Thank you.
I am a software engineer that studied electronic engineering. Figured I wanna get my hands dirty with some electronics. Going to build my first electronics project which is a solar powered battery bank. This lekker video will definitely help me ! You are a great teacher !!
Thank you very much for providing what I believe to be the best intro to BMS video on UA-cam. Clear explanations, no hype. I definitely benefited from your video!
Yes, I agree with S.Kumar. Lesson taught in a clear and concise manner, very easy to understand even for someone like myself, who has zero knowledge. Thank you, Martin. Keep such good videos coming. Cheers!
I've been watching a lot of battery videos with reasonable comprehension, but everything you said was so clearly explained and well presented I understand it all perfectly now! Thank you, you're a champ :)
It's been several years since I studied physics, so I'm pretty rusty and never got too advanced. But I was able to follow and I learned a lot, so thanks! I just got an electric bike with a big lithium battery, so I was curious for that reason. Good to know a BMS is a safety feature in addition to a way of extending the battery's lifetime!
Excellent video. Although i have many chargers and balancers to charge up my batteries i have one charger that only charges through the balancer wires and that i can see now that charges each battery individually which is why i always liked it as the batteries always charge up well balanced.
Good Tutorial ，some suggests below : 1 - 18650 batteries whether in series or in parallel into the battery pack is a certain requirement for the battery, especially when used in series, the battery voltage, internal resistance, capacity as much as possible requirements, the voltage difference of 20mV, internal resistance difference of 10 milliohm, capacity The difference between 20mA is reasonable, 2 - especially the batteries with too much internal resistance connected in series will cause fever, and serious will cause smoke to catch fire. Be careful! 3 - There are also battery packs to pay attention to the problem of short circuit. Note that only high-temperature adhesives, barley paper, nickel and other accessories are used to avoid scratching the battery skin and scratching the skin. Dont suggest to diy the lithium ion battery pack if you are not known all these knowledge of battery balance management detais .
Wow, Thanks. I've been converting my JarCat Catamaran to electric, and have really feared treading into the Lithium ion battery packs. I've got 2400 watts of AGM's, at 210 lbs. 660 watts of solar, and an MPPT charge controller, but, I'm really looking forward to the conversion (and understand it a bit more) and the weight/power savings. Thanks again. Really good Job.
Martin you are an outstanding teacher very good presentation of the BMS and how they work keep up the good work and I hope to see a presentation of the Lead Acid Batteries because that's what I use in the e- bike that I have. I got me one of those e-bike kits conversion kits and it's being working good but the batteries are big and heavy. I going to buy the some Tender Lithium Iron Phosphate Batteries and I would like to know if they do have a BMS within the battery.
excellent explanation. so my new LiFePo4 died after 2 months living outside. coldest temp 14°F. Presume the BMS failed as 12V battery was .2v when i tested it. charged back to 2.0v overnight. Will a new BMS work to bring it back to life ?
I know this post is quite old. But perhaps you can help. I have a 5S setup. and the same Balancer your using @15:00 mins. But I cannot find any schematic of how to wire. I lookat at your video many times trying to see how you have the batteries wired up. can you poss show a wiring schematic of the pins on the side of the unit? or or? Thanks - Sam
ElectronFun.com Thanks. You have a great channel. I hope you find time to do more videos. I have added it to the list of channels on my home page. Cheers, Martin.
mjlorton My regular job is quite demanding, but I'm doing what I can to start making more videos. You are one of my favorite UA-cam creators and I would never have expected you might add my tiny channel to your list - thank you so much!
Thank you! Trying to decide if i dare to buy a complete imiev electric car battery pack ( the car was in a crash so i can buy the cells quite cheap ) but i have so many questions about lithium bateries. Thank you for helping me understand the general idea behind bms! Tomas/ sweden
Hi. Very educational video. Thanks. Im trying to put together a battery pack for my motorcycle with each cell 2.1 amps. 5 rows in parallel and three cells in series to give 12.6 V fully charged at 10.5A. As Im a newbie, I do not know which BMS I should use and how to connect. your assistance if possible will be highly appreciated.
Great video Martin. I can not wait to see the review on my SBMS. It will probably be one of the most detailed feedback that I will get about the SBMS. I'm already thinking about the new version and all the feedback from SBMS users is extremely important.
I work on boats that have inverters in them, that wind up doing exactly what you describe. You get situations where the chargers arent "smart" enough and wind up destroying big battery banks that are tied in series. You get one batter get low on water or get a bad cell and the charger on the inverter only sees nominal voltage and just keeps dumping current into the bank until it over charges the good batteries. Ive always wondered why they dont put this type of technology into these inverters.
great tutorial as ever,thank you. Q. I have noticed that on power tools the balancing wires are fed into the power tools trigger via the battery pack , Why would this be when the balancing leads are for charging? Thanks
I've been looking at building a small battery bank myself and have ordered a few BMS's off eBay for Cell's between one and six to play around. I have been thinking if using the single BMS's will work in a large battery pack, but I am worried about a the battery's trying to charge one another anyway with that kind of set up.
Hello, really great video. I just bought a scooter and this scooter has a 52V and 22.4Ah. How will I know if all the individual cells are charging equally. I think the battery comes with BMS . Is there a device I can use externally to check if cells are charging same level. Thank so much.
Hello martin ... my question is . Can i use 18650 laptop cells with deferent capacities with BMS ? Such, 19650 mah with 2200 mah With 2000 mah .. its 3s pack by the way
Very good video, thx . I have a LiMn battery that I bought as new but I ve never used, which was stored during one year. It does noy want to take charge from its charger now. Can you help me to restore it?
thank you.I test electrodacu's sbms4080. for some days as solar charger and on my ebike too.it's exactly what I need for my precious lithium cells. looking forward for the review!
Thanks for sharing your knowledge I have questions with respect to cell balancing please help me 1.when this cell balancing will occur is it when charging the battery or when any cell goes more then rated voltage. 2.As in the video in order to enable the cell balancing you took cell to its highest voltage level in real life it may leads to exposion correct me if am wrong 3.can you please explain below scenario if am following passive cell balancing where a resistor is used to discharge the excess voltage of cell I have 3 cell of maximum voltage that it can store is 5v nominal voltage is 3.3v 1st cell is at 1v 2nd cell is at 3.3v 3rd cell is at 2v Here when cell one reach 3.3 v the second cell voltage will 5.6v which may leads to exposion In all the above I have connect the cell in series
I have a question I hope someone can answer. I just bought some LifePo4 batteries for my off grid system. 4 - “KiloVault” 3600 Wh each. They have a built in BMS and I want to maximize longevity. I plan on only ever going down to about 25% DOD. So my question is about the top end of charging. Is it ok to only charge them to say 99% state of charge each time? Or do I have to worry about some type of finishing charge like lead acid? Thank you in advance.
thank you so much. I have a question Suppose that we have 3S3P battery pack and we balance first 3 series cells of first parallel line. Do we have to do it for other 2 parallel line?or is there another way?
how can the BMS tell the difference between the voltage of the charger and the voltage of the battery pack? as in the diagram they are connected together?
Very nice video Martin, thanks for it. I have a question, I want to make an 18650 battery pack of 4 batteries in series and I wonder what is better: to have Battery Management System for the hole pack or to have 4 Battery Management System for each battery in the series?
I have a doubt. what if one or more sub packs are dead? SInce the bms balances each sub pack by bleeding it to the level of the lowest sub pack will it also kill the rest of the sub packs? Or does it have a mechanism to cut off that particular sub pack from the rest of the battery while charging and balancing?
Dear, i have a E bike batterij 36V 13 Ah (don't Know the capacity of the individual cells). Fully charged i am measuring 40.7V. After driving+/- 30 km the bike is cutting off at 37V (action radius should be +/-90 km). This is going on with Bafang motor bike but also with Tongsheng motor bike (so problem at battery level?)! On the battery capacity level indicator i have 3 green LEDs remaining (so battery about 70% capacity) After measuring different packs of batteries i measuring between 37 and 37,2 V. What can be the problem? Thanks for your reaction. Greetings
That is definitely the problem in the battery pack. Did you build the battery pack yourself? How many parallel connections are in that e-bike battery pack?
So say i want to build a power wall. Does it make sense to run all my packs in 48v or should i run smaller packs say in 12v and then run those moduals in series.
The easiest/cheapest way to do it is to use the device he is using for balancing. Wire every set up with the wires and then balance the set to your minimum voltage you will be using. Lets say 3.2 volts. Do this with every set in your battery pack. Now all single cells in your entire battery are discharged and all at 3.2 volts. Now charge the battery to your max voltage, say 4.1 volts. Once done charging check every set once again by plugging every set in one after another and they all should be balanced at 4.1 volt. Now all induvidual cells should stay within range and balanced over time. Just plug every set into the device every 6 months or so, or 100 cycles for example, to check if they haven't drifted apart to much. They should now stay ballanced to eachother to within very small margins naturally. Especially when using houndreds of cells it can become a nightmare as well as very expensive to realtime manage every individual cell in a battery. Doing it this way you keep it simple and if you just check every once in a while you will be able to catch any issues before it becomes a problem. And all you need to do is just wire up every set that is in series with the cables so you can just plug it in when you want check up on them.
Thanks Martin for your explanation about BMS. Your Video is very helpful for me to make an E bike battery. Ik have some knowledge about electricity and now I´m busy to make a battery for my E bike. Can you advice me about a good BMS with the next specifications 36V-11,4Ah (40 cells). I really don´t know which one I have to buy!Greetings from Dick (from Holland)
You explained BMS better than anyone else Ive come across, thanks.
Hello Martin,
I have been watching many many instructional videos regarding charging Li-Ion Batteries and BMS around it. But, none of the instructions were able to explain as elaborately and as the simplest way, you have explained. Your teachings just went into my brain and I could understand the basics of charging the above cells. You are a great Teacher. Thank you.
Your explanation is great Martin.
Really enjoyed watching this.
I am a software engineer that studied electronic engineering. Figured I wanna get my hands dirty with some electronics. Going to build my first electronics project which is a solar powered battery bank. This lekker video will definitely help me ! You are a great teacher !!
Thank you very much for providing what I believe to be the best intro to BMS video on UA-cam. Clear explanations, no hype. I definitely benefited from your video!
simplifying things and explainign is an art, and only peolpe who nderstoodthe concept can do that, you are one such expert! thank you
Yes, I agree with S.Kumar. Lesson taught in a clear and concise manner, very easy to understand even for someone like myself, who has zero knowledge. Thank you, Martin. Keep such good videos coming. Cheers!
Hi Martin , understood the working of BMS in one shot from your video even for a person who is new to batteries and related electronics like me.
Thanks Martin. Nice introduction to battery management systems and cell balancing. Looking forward to your review of Dacin's SBMS.
totally agree with my friend.
Julian Ilett Thanks Julian.
@@proyectosledar eying cc to get your own home and I will have the same as
Thank you for sharing your knowledge. And your edited presentation is very well done.
I've been watching a lot of battery videos with reasonable comprehension, but everything you said was so clearly explained and well presented I understand it all perfectly now! Thank you, you're a champ :)
Your video is so helpful in getting me brain actually understanding BMS now :) Thank you so much !!!!
Miguel Bodega Thanks for the feedback.
Amazing!... I learned more here in the first 2 minutes than anywhere else on UA-cam!!! in a week !!!
This is a very helpful description. Thank you for sharing it.
Great video, very easy to understand! Better then a video just showing the wiring =)! The drawing was perfect
Excellent video. Thanks for the clear description!
Awesome presentation; well spoken with great illustrations.
Love the way that you explain things in a way that even I can understand. Thanks!
Thank you a great job on the information and delivery of the subject matter video.
Excellent video! Thank you for the clear explanation!
It's been several years since I studied physics, so I'm pretty rusty and never got too advanced. But I was able to follow and I learned a lot, so thanks! I just got an electric bike with a big lithium battery, so I was curious for that reason. Good to know a BMS is a safety feature in addition to a way of extending the battery's lifetime!
Great video. Finally got my head around battery balancing.
Adam Al My pleasure, thanks for the post Adam.
Hi Martin, this video is by far the best I have ever seen on BMS ! Thanks a lot!
very clear and good explanation. thx u
Excellent video. Although i have many chargers and balancers to charge up my batteries i have one charger that only charges through the balancer wires and that i can see now that charges each battery individually which is why i always liked it as the batteries always charge up well balanced.
Good Tutorial ，some suggests below :
1 - 18650 batteries whether in series or in parallel into the battery pack is a certain requirement for the battery, especially when used in series, the battery voltage, internal resistance, capacity as much as possible requirements, the voltage difference of 20mV, internal resistance difference of 10 milliohm, capacity The difference between 20mA is reasonable,
2 - especially the batteries with too much internal resistance connected in series will cause fever, and serious will cause smoke to catch fire. Be careful!
3 - There are also battery packs to pay attention to the problem of short circuit. Note that only high-temperature adhesives, barley paper, nickel and other accessories are used to avoid scratching the battery skin and scratching the skin.
Dont suggest to diy the lithium ion battery pack if you are not known all these knowledge of battery balance management detais .
Awesome, BMS. a technology all its own...
Looking forward to the next one with the Solar controller..NICE work
Peace
Wow, Thanks. I've been converting my JarCat Catamaran to electric, and have really feared treading into the Lithium ion battery packs. I've got 2400 watts of AGM's, at 210 lbs. 660 watts of solar, and an MPPT charge controller, but, I'm really looking forward to the conversion (and understand it a bit more) and the weight/power savings. Thanks again. Really good Job.
Great video. Can you pleas provide a link to the the next / specific video (i.e., specifically referenced, at the end of this video). Thank you.
Martin you are an outstanding teacher very good presentation of the BMS and how they work keep up the good work and I hope to see a presentation of the Lead Acid Batteries because that's what I use in the e- bike that I have. I got me one of those e-bike kits conversion kits and it's being working good but the batteries are big and heavy. I going to buy the some Tender Lithium Iron Phosphate Batteries and I would like to know if they do have a BMS within the battery.
Thank you now I understand the importance of balancing the cells
excellent explanation. so my new LiFePo4 died after 2 months living outside. coldest temp 14°F. Presume the BMS failed as 12V battery was .2v when i tested it. charged back to 2.0v overnight. Will a new BMS work to bring it back to life ?
great explanation.many thanks
Great video with excellent explanations! Thanks.
I know this post is quite old. But perhaps you can help. I have a 5S setup. and the same Balancer your using @15:00 mins. But I cannot find any schematic of how to wire. I lookat at your video many times trying to see how you have the batteries wired up. can you poss show a wiring schematic of the pins on the side of the unit? or or? Thanks - Sam
Hello Martin, where can I find the bms you used in the video? Thanks for share!! Túlio
Great video Martin! I finally know what BMS is all about. Thanks for sharing!
ElectronFun.com Thanks. You have a great channel. I hope you find time to do more videos. I have added it to the list of channels on my home page. Cheers, Martin.
mjlorton My regular job is quite demanding, but I'm doing what I can to start making more videos. You are one of my favorite UA-cam creators and I would never have expected you might add my tiny channel to your list - thank you so much!
Thanks Sir,,,🙏Can I charge 4 Li ion mobile batteries (also 18650) by Laptop BMS Circuit it also have 5 wire as you shown...🙄🙄🙄
Thank you! Trying to decide if i dare to buy a complete imiev electric car battery pack ( the car was in a crash so i can buy the cells quite cheap ) but i have so many questions about lithium bateries. Thank you for helping me understand the general idea behind bms! Tomas/ sweden
Hi. Very educational video. Thanks. Im trying to put together a battery
pack for my motorcycle with each cell 2.1 amps. 5 rows in parallel and
three cells in series to give 12.6 V fully charged at 10.5A. As Im a
newbie, I do not know which BMS I should use and how to connect. your
assistance if possible will be highly appreciated.
Great video Martin. I can not wait to see the review on my SBMS. It will probably be one of the most detailed feedback that I will get about the SBMS. I'm already thinking about the new version and all the feedback from SBMS users is extremely important.
Good day. Is the ah of the bms matter? Like for instance i will use a bms board with 35ah but in actual ah of a battery is 38 or 45 or 60 ah.?
thank you so much... it is very much interesting and easy to understand.
GREAT EDUCATION tHANK YOU REGARDS
I work on boats that have inverters in them, that wind up doing exactly what you describe. You get situations where the chargers arent "smart" enough and wind up destroying big battery banks that are tied in series. You get one batter get low on water or get a bad cell and the charger on the inverter only sees nominal voltage and just keeps dumping current into the bank until it over charges the good batteries. Ive always wondered why they dont put this type of technology into these inverters.
great tutorial as ever,thank you. Q. I have noticed that on power tools the balancing wires are fed into the power tools trigger via the battery pack , Why would this be when the balancing leads are for charging? Thanks
crystal clear explanation
Is it possible to replace a laptop's battery protection circuit which is locked by a code or simply use a new circuit?
Thank you Martin, very useful.
K GANESH RAMA RAO My pleasure, thanks for the feedback.
I have 5kw solar panels without power bank, I have 10 uxh125-6fr. Can I use these as a power bank.Do you have any idea how to set up the system ?
very good explanation,thanks
Very nice video, thanks for your time.
great job! I'm a lot smart now which may not be saying much based on where I started from!
I've been looking at building a small battery bank myself and have ordered a few BMS's off eBay for Cell's between one and six to play around.
I have been thinking if using the single BMS's will work in a large battery pack, but I am worried about a the battery's trying to charge one another anyway with that kind of set up.
Hello, really great video.
I just bought a scooter and this scooter has a 52V and 22.4Ah. How will I know if all the individual cells are charging equally. I think the battery comes with BMS . Is there a device I can use externally to check if cells are charging same level.
Thank so much.
Hello martin ... my question is . Can i use 18650 laptop cells with deferent capacities with BMS ? Such,
19650 mah with 2200 mah With 2000 mah .. its 3s pack by the way
Oh just the video I was looking for! Thank you very much Sr!
Very good video, thx . I have a LiMn battery that I bought as new but I ve never used, which was stored during one year. It does noy want to take charge from its charger now. Can you help me to restore it?
Off I go to see if you have any more videos on BMS and its make up. It would be great if someone showed a schematic of BMS for DYI.
Thank you, sir. Great information!
very good explanation thank you
Amazingly explained. Thank you.
Amazing video thanks.
thank you.I test electrodacu's sbms4080. for some days as solar charger and on my ebike too.it's exactly what I need for my precious lithium cells. looking forward for the review!
Great video. 👍
A very helpfull tutorial, now I get it ,thanks Martin
Thanks for sharing your knowledge
I have questions with respect to cell balancing please help me
1.when this cell balancing will occur is it when charging the battery or when any cell goes more then rated voltage.
2.As in the video in order to enable the cell balancing you took cell to its highest voltage level in real life it may leads to exposion correct me if am wrong
3.can you please explain below scenario
if am following passive cell balancing where a resistor is used to discharge the excess voltage of cell
I have 3 cell of maximum voltage that it can store is 5v nominal voltage is 3.3v
1st cell is at 1v
2nd cell is at 3.3v
3rd cell is at 2v
Here when cell one reach 3.3 v the second cell voltage will 5.6v which may leads to exposion
In all the above I have connect the cell in series
amazing explanation...
I have a question I hope someone can answer. I just bought some LifePo4 batteries for my off grid system. 4 - “KiloVault” 3600 Wh each. They have a built in BMS and I want to maximize longevity. I plan on only ever going down to about 25% DOD. So my question is about the top end of charging. Is it ok to only charge them to say 99% state of charge each time? Or do I have to worry about some type of finishing charge like lead acid? Thank you in advance.
what is the required bms for 14.4v 30ah lipo battery pack ?
good video sir
Very good video. Thank you!
Good job - thanks Martin.
Great and so useful ,
Hello dude I'm building a 24 volt 7p 7S battery for my ebike could u tell me a good Bms I could get for it thanks and keep up the good work dude
thank you so much. I have a question Suppose that we have 3S3P battery pack and we balance first 3 series cells of first parallel line. Do we have to do it for other 2 parallel line?or is there another way?
Superb explanation! Thank you :)
Do you have a name or link to the balancer you are using in this video?
excellent information
Good job dude
so in parallel is better? you wont have any probs?
how can the BMS tell the difference between the voltage of the charger and the voltage of the battery pack? as in the diagram they are connected together?
good job explaining., thank you.......
Very nice video Martin, thanks for it.
I have a question, I want to make an 18650 battery pack of 4 batteries in series and I wonder what is better: to have Battery Management System for the hole pack or to have 4 Battery Management System for each battery in the series?
for 4 cells it really doesnt matter, so it really doesn make sense to have multiple bms units. just use one.
I have a doubt. what if one or more sub packs are dead? SInce the bms balances each sub pack by bleeding it to the level of the lowest sub pack will it also kill the rest of the sub packs? Or does it have a mechanism to cut off that particular sub pack from the rest of the battery while charging and balancing?
Wow,outstanding video...!!! Thank you so much 😃
can you please explain JST connection and how we can use it ?
I have a 6s bms on a 6s (22,2v) lipo battery but i don't know what the maximum voltage that i can put into the bms. Please help!
Very helpful, thank you
sir can u explain block diagram of the battery management system ... and how i madethis BMS...
I thought the minimum discharge voltage is around 2.5v?
Dear, i have a E bike batterij 36V 13 Ah (don't Know the capacity of the individual cells). Fully charged i am measuring 40.7V. After driving+/- 30 km the bike is cutting off at 37V (action radius should be +/-90 km). This is going on with Bafang motor bike but also with Tongsheng motor bike (so problem at battery level?)! On the battery capacity level indicator i have 3 green LEDs remaining (so battery about 70% capacity) After measuring different packs of batteries i measuring between 37 and 37,2 V. What can be the problem? Thanks for your reaction. Greetings
That is definitely the problem in the battery pack. Did you build the battery pack yourself? How many parallel connections are in that e-bike battery pack?
which BMS are you using in the video?
Can a BMS work as an ideal diode for batteries batteries in parallel ?
So say i want to build a power wall. Does it make sense to run all my packs in 48v or should i run smaller packs say in 12v and then run those moduals in series.
The easiest/cheapest way to do it is to use the device he is using for balancing. Wire every set up with the wires and then balance the set to your minimum voltage you will be using. Lets say 3.2 volts.
Do this with every set in your battery pack. Now all single cells in your entire battery are discharged and all at 3.2 volts. Now charge the battery to your max voltage, say 4.1 volts.
Once done charging check every set once again by plugging every set in one after another and they all should be balanced at 4.1 volt.
Now all induvidual cells should stay within range and balanced over time. Just plug every set into the device every 6 months or so, or 100 cycles for example, to check if they haven't drifted apart to much.
They should now stay ballanced to eachother to within very small margins naturally.
Especially when using houndreds of cells it can become a nightmare as well as very expensive to realtime manage every individual cell in a battery. Doing it this way you keep it simple and if you just check every once in a while you will be able to catch any issues before it becomes a problem.
And all you need to do is just wire up every set that is in series with the cables so you can just plug it in when you want check up on them.
excellent
many specs of the 18650 said discharging cut-off 2.75V, but you said 3V, we are talking about the same
Thanks Martin for your explanation about BMS. Your Video is very helpful for me to make an E bike battery. Ik have some knowledge about electricity and now I´m busy to make a battery for my E bike. Can you advice me about a good BMS with the next specifications 36V-11,4Ah (40 cells). I really don´t know which one I have to buy!Greetings from Dick (from Holland)
Do your device support 10s ? If I already have A bms on thr battery and I want an extern display to monitor like this how to do ?
Very, very helpful, thanks.