The complete Guide to using 3S 40A Lithium BMS Battery Charger
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- Опубликовано: 31 май 2024
- In this video the 3S 40A Battery Management System (BMS )module, all components is explained, battery pack preparation for 18650 Cell shown, how to charge, and tests listed below preformed. OverVoltage Protection OVP, OverCurrent Protection OCP, Undervoltage Protection UVP and Short Circuit Protection SCT have been demonstrated.
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Chapters of this tutorial
00:00 Start
01:27 Introduction
06:15 Components
11:27 Schematic Viewed
13:45 Battery protection (schematic)
15:37 Short Circuit Protection
17:56 Preparing Battery Pack
23:01 How to charge battery
26:06 Charge Current Test
28:23 OverDischarge protection test
30:52 OverVoltage Protection test
31:57 ShortCircuit Protection test
we have over voltage, over discharge, short circuit , under voltage protection
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#wattHourBMS
Hello, Free and I ship it for free. If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
How about Papua New Guinea?
Got another one to give? 😂
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15:21 15:21 15:21
There is no way this guy isnt an educator in real life. This was too good.
One of the most comprehensive videos on BMS. Thank you kindly.
Glad you enjoyed it! Please subscribe. I appreciate it and helps my channel grow. Thank you
@@WattHour Great and detail video! I currently building a 3s pack with samsung vtc5a ( max discharge 35A ). What wires should I use? 8awg are enough? Does this apply to the connections with the bms? Thank you!
Earned a subscriber! I’ve been looking for instructions on building a custom 8s charger for 18650 cells and this is what I needed to understand the technical aspects of these boards!
THIS CHANNEL NEEDS MORE RECOGNITION !!! HE EXPLAINS IT SOOO WELL
Thank you. please share it with your friend via email and Facebook or other means.
I've seen many sketchy and questionable videos about BMSes and am happily surprised by the quality of your explanation and your review. Many thanks for your work 👍🏼
You deserve much more subscribers.
Very in-depth, probably the most in-depth analysis of this module on the internet. It was valuable to see the actual model number of the original design in this video (hx-3s-fl25a-a), because the module I was using was completely nameless, but identical, so it was hard to find info on it.
THANK YOU SO MUCH for this great video! This is exactly the style of board I was going to use in a project for a chirstmas gift but wanted more information to make sure I use it correctly. Great detailed explanation! Thank you so much!
Your explanation was really helpful for a novice like me in understanding the BMS. Tqvm!
Very nice video , I have used these boards for a few battery packs I build 2 years ago. They haven't failed me yet. I have the version you are holding at 6:35 and the battery terminals have a metal plate on them so you can spot weld nickle strips to them instead of soldering wires. It's set up so the strips line up perfectly to the cells to keep the strips short. I paid about $3 USD for each in a pack of 3. Very cheap.
Best explanation on RUclips. Awesome video. Just subscribed
Actualu, I try to seek every youtuber that build batterypack, but they didn't explain about bms as complex as you are
Hats of for you sir, excelent explanation :3
I am glad you found it useful. Please subscribe. I appreciate it and helps my channel grow. Thank you
Lots of good info. Thanks for showing all the features, especially the short-circuit protectdion.
Finally a guide for newbies, I wish I've found this earlier, very good and in depth explanation. Thanks!
Hello, If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
best video about bsm's! comprehensive and accurate, yet simply explained.
Hello, If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
I don't understand all but I can understand some. I want to say it's a great explanation. Thank you so much.
Beautifully explained, in detail and data given and cct demystified,………!
You have done an excellent job , . Many thanks …….!
I am sorry to say your pronounciation confused me, on occasion but I thoroughly enjoyed your video because of your details and thorough explanations. As someone who is just getting involved in electronics experimenting after many years working in an unrelated field, I appreciate your explanations. Keep producing these videos!
Very well explained. Keep up the good work. Subscribed to the channel 😀
I’ve been looking for this channel for a while now. I seen it playing but at the time couldn’t sub and later when I went to look at my history it was gone. Finally I have it saved now and subbed. Thanks.
this video was under my other channel youtube.com/@Robojax. I moved it here which is focused on Energy and chargers etc. you are welcome.
@@WattHour 😂 wouldn’t you know.....
I’m subbed there as well.
It was meant to be. ❤️ 😂
Great video, explained like no other video I have seen so far. Thank you, Sir.
You are welcome!
Thankyou. I haven't been considering the current I supply when charging. I just connect anything that outputs the correct voltage. Car battery was on the list till you helped me see the light. I've got plenty of Buck converters with current adjust just gathering dust & waiting for a purpose like this.
Outstanding video sir! Thank you so very very much for taking the time to make such a very good tutorial for everyone to learn from!!! Thank youuuu!!!!
Awesome man, very thorough
Excellent presentation, Thanks
Thank you for this video. I learned a lot.
This is was the best video about BMS! Thanks !
I was figured out about make a test recharging the batteries and consuming it at the same time.
My doubt was if BMS manage it or it's just 2nd Kirchhoff law. Of course with a power supply at the same level of the recharge voltage in BMS.
Hello, If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
@@WattHour thank you very much. But i'm from Brazil. A little bit far away lool. Thanks for all attention!
Well explained. Thanks a lot Sir!
Thankyou for a very informative tutorial.
good information
love from India🇮🇳
Very interesting and good explanations and nice experiments setups - THANKS.
Great explenation! Thanks for the nice job!
you are welcome. Don't forget to subscribe. I really appreciate it.
Very excellent vlog . bro . I will salute your hard work. And the vlog is very informative. Liked from india. Perfect knowledge and very good picturisation . nothing is left very nice and elaborated vlog nicely explained.
Really helped. Thank you so much.
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Very informative. Thank you
thank you man ;, realy very rich content and very educational so detailed , this was realy helpfull
excellent overview!
Great vídeo. Greetings from Mexico.
Sensacional explicação.
Great video thanks for this information
Excellent video 👍
I searched eBay for "12V 3S 40A Lithium BMS" (without quotes) and results return "Standard", "Enhanced" and "Balanced", but don't know which I should be using. I'm thinking of putting together a few packs for use with my UPS's using the battery boxes on eBay (searched for 12V 10Ah 3S 7P). Thanks for the very educational video!
you are welcome. the more you pay the more features you get.
Awesome and amazing Video about BMS 🥰
Glad you liked it!
Complete video on EVERYTHING ABOUT BMS.
if you still have doubt ,
"watch the video again"
Thanks.
Clear explanation bro make more like this
Thank you, I will
Thankyou for explanation.. 👍
Hello, If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
Appreciate the tests! What's a good discharge rate for the thermals for this board? I'm hesitant to buy this and find out I can't do 30A
Thank you!
Great video!
Hi, I don't know but I can't reply to you under other videos you posted. I have a page where I can see all comments on one page and I see your 4more comments under three videos but two of them don't allow me to reply. It does not show your name. your name is just a dot (.) and that could be the reason. Just wanted to tell you because I can't reply for most of your comments.
thanks for detailed video
You are welcome
You are a genius 👏
Thanks from Bangladesh
Well done, thanks
Nice video shot, thanks for sharing, keep it up :)
Awesome video!
You are welcome. Please subscribe. I appreciate it and helps my channel grow. Thank you
thank you
Thank you very much.very informative vudeo
You are welcome
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11:03 OC is not Over-Current protection output, but an Over-CHARGE output, which turns the MOSFET off to stop charging once the battery reaches a certain voltage.
Also, I have a BMS board (actually a protection board) which has its P- (negative output for the LOAD) taken from the Drain pins of the MOSFETS.
Hello, If you live in Canada or USA, I am giving away this DL24P 180W load and energy meter. Make sure to sign up for it ruclips.net/video/-UblSfUEY-0/видео.html
I made an ups with 3s 25a BMS and 6cells of 18650. My router supports 12v 1.5amp. Can I use a 12v 5amp adapter to charge the ups alongside to power the router.
5a-1.5a=3.5amp for my 3s battery pack (6*18650 batteries total (🔋🔋+🔋🔋+🔋🔋))
Is it alright to use 12v 5a charger? Is it going to quickly reduce the battery lifespan?
Excellent, thanks!
The best thank you for me is to subscribe to my channel. Your subscription is stamp of rating to my channel and others can find me too. Thanks
So for some reason on my BMS and I have 3 brand new ones when I hook them up the voltage on the pack reads 12.50volts but on the B- B+ it reads 11.50v everything has been hooked up to balance wires and when I test the balance plug each series of cells reads 4.15v so the only thing that’s not the correct voltage is the bms. Can I move the wire from B- to the 0v side of the board? When I do that it reads the 12.50v but I’m not sure if this is bypassing the bms or not.
I am pretty sure that your RUclips upcoming star for exploring n testing... i subscribed.
Keep it up sir.
Thanks for the sub!
Thanks
Thank you very much.
You are welcome!
Good video! thanks for all the detail. Question: Can you use fewer cells than the board is designed for? Can you only install 3cells on a 4 cell board and have it work properly?? Thanks
Do I need to connect (weld, solder) batteries to the BMS board in sequence (from plus to minus or vice versa) how is it in the laptop battery so that the board does not go into protection?
Very informative
Glad you think so!
Great directions you've maid.
Would you be kindly tell how about to reduce batteries charge cycles amount?
How to unplug the load from batteries while the charger power supply is on and we need to power on the load from the initial power supply?
How to commence the charging only if voltage dropped to a precise value? For example I don't want to get my batteries charging everytime, but after a certain discharge (voltage drop)?
Thanks
Great explanation, Helps a lot. I have one question, What is Q3 used for?? I'm wanting to try to build my own version of this type of BMS but some boards have that transistor and some dont...
Wow this channel is a hidden gem. Nothing like this on youtube.
2.3v is very low for over discharge protection. I've been trying to find a cheap board like this, but with higher discharge protection voltage (like 2.7-3v), but all of them seem to go so low that I'm worried for the lifespan of the battery
The discharge value is determined by the manufacturer. if they say, it will be okay.
@@BAMB00STER4EVER Exactly! 2.3 is way too low for most 18650s and all of these cheap boards have the same specs. I connected 3 batteries too a board similar and one cell is dead since it let it go way low. Another thing I did was put 2 low 3.4 (ish) voltage cells with a one that was 4.0v and it overcharged the 4.0v cell rather than stop charging it while the other cells caught up.
The connector with s1,s2 is a temperature sensor input point.
I came accross a weird stiuation. My 2S3A BMS has no voltage reading on the output, so I assume it's faulty. But when I reverse the input polarity I get a reading (slightly less than actual V). So, would it still provide some protection?
Very helpful thanks
but wanted to know the no. of maximum cells the board can handle as is divided by 3 . 0 v to 4.2 v and 4.2 to 8.4 and 8.4 to 12.6
or is possible to doable the each cell by 2cells in series v will same but capsity will doabled
Hi. I have also a 3s bms but the output is less than the supplied voltage when measuring from the P+ & P-. Does it mean, one of the mosfet is dead? I noticed this issue with few bms I have used before after using for some time. I am curious what could be the problem. thanks
I have made a pack for my drill battery with 4s 40a bms(balanced, li-ion batterys 3,7v) and i charge it cc 1,25a cv 16,8v (buck dc-dc converter) but never goes up to 16,8v from charging ..Stops until 16,3 and the battery itself has 15,85v after take it out οf charger and then increased a little bit on its own(≈ 16,0v).Means not fully charged 4,2v. Any explanation??
Hello, thank you for the video. I am using such 40A bms but with 10mosfets version (REV2.3 was printed on the back side). Suddenly I noticed that battery voltage is 0.4-0.6V higher than output voltage. The voltage difference is noticed between B- and P-. I tried to short B- and P- as some people suggest but no reaction, problem still exist. This was not always like that, at the begging of use it was fine. Have you ever experienced such problem? Any ideas how to solve it?
Thank you Mr. Mohamed for your helpful videos, can we connect these bmss in series
Nice explanation on this topic. I have a question however: I'm using one of these managers to assist a pack of four batteries (4S) to feed a 14.4 cordless drill. There is a problem, the overcurrent (short) protection trips every time I pull the drill trigger. I wonder if I solve it by shorting the current sampling resistors (and shutting down the overcurrent protection) or there is a better solution for that. Could you please advise?
I have been playing with a knock-off set of 18/20 V Dewalt batteries. Dewalt seems to have the charging BMS in the charger rather than the battery pack. They have individual cell voltages as well as the main connections in the connector. When it is in the tool, there is no overcurrent protection such as there is in the BMS. Having the BMS in the charger cuts costs, for the sack of a more complex connector.
The video illustrates just how complex lithium batteries are and the real danger of not charging them properly. There have been a number of house fires locally due to charging scooter batteries.
The Dewalt battery pack has 5 pairs of parallel cells in series. So the BMS works with a pair of cells rather than one.
Try adding a 10-100uF capacitor across the output terminals it should help with the starting current.
I only have a power source of 12v 1A which I suppose would not be enough for charging a battery pack with this BMS connected. So I charge these cells individually by disconnecting them from the BMS using tp 4056. When the cells are charged, I put them back to the BMS, keep it for a few hours yo get properly balanced. Is this way advisable? (I do this Because I don't have a good current capacity 12v supply for charging my battery)
thanks for this! very helpful. I've been thinking about combining this with a lithium polymer pack for easy charging.
i do have one question though, if your input voltage is at 12.0 for example, will the battery still charge to the maximum of 12.4 volts? or would you need to raise the input voltage. thanks!
Very nice information
I am glad you found it useful. Please subscribe. I appreciate it and helps my channel grow. Thank you
@@WattHour Thanks
Can a 2s battery system be connected to a 3s BMS..and input voltage given accordingly, like 8.4 volts?
Also, these BMS, do they automatically do trickle charge ( if initial battery voltage less than threshold)
And do constant voltage charging when battery reaches upper threshold and automatically cut off when charging finishes?
Does the BMS handle all these and just a constant current source with appropriate voltage needs to be attached to the BMS?
Also, if constant current is set on the power supply, how does the bms do the trickle charge/ constant voltage charge at low currents?
Love you from Bangladesh ❤❤❤❤❤❤❤❤❤❤❤
Need help. I have the exact same 3S25A model. How can I bypass overcurrent protection? It prevents my 12V DC motor to start. I tried shorting current sending resistor but that did not help. Thanks.
I realize your video is now over 3 years old but I still have questions. You showed three cells charged to the max and then applied 17 volts to show over voltage protection. I'm wondering what would happen if you applied this same voltage to a drained battery pack. Would the individual cells accept a charge at this point? Is there an internal voltage regulator that would drop it from the 17 volts to the appropriate levels for charging and then cutoff at maximum charge?
And what happens if one of the cells is internally shorted such as the middle battery in this case? Would the BMS still manage to charge the remaining two batteries? Would it simply cutoff all charging? Your individual battery volt meters, are they going to read correctly if the middle battery was shorted internally?
I don't have a module that have constant current adjustment, can i charge through it my battries, and my cells are not all same voltage can i connect those to bms or first i need to full charge it individually.?
when the overcharge was tested, how do we know if the controlled voltage was not a result of internal circuit in the batteries are functioning?
Excellent video. I have noticed that some BMS boards have a temp sensor input.Can you elaborate on it’s application?
its actually a normally close temperature switch. it go open circuit when it temp rating is exceed. (usually 40C) this will also cause the main mosfet to turn off. after it cools the switch will again close and circuit will resume normal operation. If board does not come with temp switch one can be added but you need to remove the zero ohm resistor that is used to bypass the missing temp switch. it usually next to where temp switch is soldered.
Very informative. If you can add the cell balancing observations to the video also, that would be really useful
thanks. It is here ruclips.net/video/l2APm5olDiA/видео.html
Thank you :)
You are welcome. Please don't forget to subscribe. I appreciate it.
Great video & detective work! But I think you might be missing something re the 2213 balancing circuits (or maybe it's me). Yes, if somehow a cell were over 4.2 V, the 2213 would drain it till it reached 4.19. But...we're more interested in what happens during charging. Here, if the available charging current is enough, there's nothing to stop a cell from going above 4.2 V. The 2213-controlled FET will be on, diverting ~70 mA away from the cell and reducing its charge rate, but it'll continue to charge until the OV chip disconnects everything. The simpler boards only have a 2213, so that's the bigger problem I'd guess...
This is what I was searching for. I was testing this BMS yesterday, and it didn't seem to have cell-level over voltage protection at all. Essentially makes it useless IMO.
@@anelinnonmaa How would it go over 4.2 volts per cell if there is only ever 4.2 volts provided to it?
@@anelinnonmaa Yes, very useless.
@@vhfgamer 3 batteries in series when fully charged will be 12.6 volts and you need to supply at least 12.6 volts to this board for it to charge the batteries to 12.6 volts... you can actually supply the board with a bit more than 12.6. I have a similar board, it says it will handle up to 13 or 14 volts, I forget which it. This board, in many ways, is for the most part useless.
@@ForwardGuidance Well when I provide 12.6 volts to the board, what comes out is 4.2 volts per "cell".
Can I add two cells in parallel in this bms to make a 3s2p pack, to increase capacity?
Im planning to build an uninterrible power supply (UPS), can I use this BMS in that? or in other words, can this bms discharge the energy whenever the power supply is not supplying energy?
Where do you get the documentation for the device marking codes? That is also a hard task to achieve.
Fantastic explanation of the BMS and step by step review of the BMS features. Really it has given me the knowledge about the BMS.
I wish to change the Ni-cad cells of my cordless drill to Lithium - ion batteries. The voltage of my cordless drill is 12 V. What are the requirements for this conversion and the electronics involved in doing so. Also kindly enlighten me that is it possible to use a BMS for a 3sand4p set-up of lithium ion battery. If so what's the procedure for it and the charging parameters, such as supply volt and current, then the BMS Board to be used. Your reply will help many people who are afraid to convert their drills, and toys having Ni-cad cells to lithium ion batteries. Hope to see your guidance soon.
I am glad you found it useful. converting this module is impossible. as I mentioned each chip is made for specific voltage and you can't change it. may be we can add components to make it work but it won't be fully automatic. as for 3S4P, when you connect 2 or 3 battery in parallel, this module will see them as ONE. except the capacity increases. But series will change the voltage and it won't work. it will kill the module.
@@WattHour Thank you so much for immediate attention and response. Now I am clear that altering the ni-cad cells based drilling machines or for that matter is not possible with lithium ion batteries and BMS. That's why people show only the single cells with BMS.
@@WattHour His drill is 12volts. A 3S pack charged is 12.6volts. The voltages are correct so why won't it work? Do these drills draw more than the 40A rating of these BMS boards? An electric motor usually just runs slower with less voltage so I would think the pack would work until you got down to the low voltage cut off limit for cell protection.
I've purchased four empty 12.6volt battery boxes from Ali Express. These come in kits and include 18650 holders, the nickel strips and a BMS rated at 20A or 40A that's exactly like ones in your photos. Some of the kits use a 3S7P configuration while the others use a 3S10P (3 series X 10 parallel) configuration.
Your video made it clear that there's no way these BMS boards can balance charge any more than 3 cells! Ali Express has a lot of vendors selling on their site much like Amazon does here in the States so they are not to blame for these questionable 18650 battery box kits. I do now wonder how safe they are without battery balancing.
Thanks for the video. I am still struggling on what type of charger I should use for a 3S 6P Panasonic NCR18650B with a 3S/10A BMS. I have a 12V/3A & a 16.8V/3.3A charger, which charger is more efficient/suitable to charge the pack?
you can use this for 3S. the parallel does not matter. input I forgot what was in the video but it can be I think 15V or watch the video. the 6p means 6 cells are in parallel. so voltage does not change. it just adds the capacity. so it will last longer and it will get charger in longer time.
Thanks sir
Welcome
Good 👍