3 Cell Lithium Battery Protection Board From Banggood - Electronic Project
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- เผยแพร่เมื่อ 18 พ.ย. 2016
- Application of battery protection board to use with 3 lithium cells in series (3S). I show how to wire the board to the cells for driving the load and charging. the pack. The board is only used to protect the cells, it is not a charging board. You need to supply the correct voltage for your chosen cells and ensure it has current limiting. Click Here to Subscribe bit.ly/1nformatica 3S Li-ion Lithium Battery Protection Board bit.ly/3SLipoProt 8254A data sheet datasheet.sii-ic.com/en/batter... 5Pcs E1A1 ABS Battery Box Holder For 4 x 18650 bit.ly/18650BatBox DC Power Male Female 5.5X 2.1mm Connector Adapter bit.ly/DCPowerConn FG085 DDS Function Generator Kit bit.ly/FuncGen
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Helpful, thanks
Thanks for watching. Check out my other video on how to make this board a 4 cell BMS th-cam.com/video/sZOlD9pzaQM/w-d-xo.html
i have 4s board and when i apply load on center output it drops to 0.80 im starting to think its a bad board
You may have a bad board. Also consider what the load you apply is, for example an electric drill. If a load is applied to quickly it can trigger the boards short circuit protection. In this video : th-cam.com/video/rYFT4g292jU/w-d-xo.html I use a 4S board on a drill. I need to use the drill slow start to stop the short circuit protection. Starting the drill slowly then increasing the speed works OK. Please consider subscribing if you have not done so already!
Thats a 4s BMS which can be used a 3s BMS as well.
Very informative video..
Thank you! The video that shows the modification for 4 cells is here : th-cam.com/video/sZOlD9pzaQM/w-d-xo.html
A trick: watch series at Flixzone. I've been using them for watching all kinds of movies these days.
6490 views. it deserves more.
Thanks for watching. Check out my other video on how to make this board a 4 cell BMS th-cam.com/video/sZOlD9pzaQM/w-d-xo.html
What store did you get the digital meter ? I mean the onethat shows amps, volts, watts, and AH
Hi Francisco, the one in the video is an original Watt meter from Astroflight : www.astroflight.com/101
These days there are less expensive alternatives : bit.ly/WattMeter
Un saludo!
Hello Can You help, which voltage I need to put in to charge, I Have the same board, I Put in 12v 2amp Charger, never it get charged. This was the Board ()
Hi, the minimum charge voltage is 3 * 4.2 volts i.e. 12.6 volts : th-cam.com/video/miDIXwACpcY/w-d-xo.html What I use is an old laptop charger rated 19 volts at 3 Amps and put a DC step down module which I can set the voltage an a constant current determined by the cell datasheet. The module is this one : bit.ly/LedDriver You can see how it works in one of my other videos : th-cam.com/video/QYc1On0q4AA/w-d-xo.html Ciao!
I just got mine in the mail and I want to get this right so at 3:31 you're saying that VH and VM go to the Negative of the batteries, but there's a + PLUS or POSITIVE Symbol just above them, why is that? Thanks
Hello, a very good question! the VH and VM definitely go to the negative side of the cells. This is clearly shown when I measure the cells with the meter. The "positive" symbol on the board is in fact silver and not white which is the silk screen colour for the pin assignments. I can only guess that it is some kind of "registration" mark used during the manufacture of the PCB. It is in an unfortunate place to cause confusion.
Could you please tell exactly what product at Banggood this is? I really need a board that does both over discharge protection and balanced charging (with appropriate supply of course). There are so many boards out there like this that don't do both, and as you've pointed out, its never clear which is which. Plugging the phrase "3 Cell Lithium Battery Protection Board " into banggood returns no results, and the item number in the video is hard to see. thanks!
The link to the product is in the video description: 3S Li-ion Lithium Battery Protection Board bit.ly/3SLipoProt if you pair this with a constant current supply e.g. Constant Current Voltage Step Down Buck Module bit.ly/LedDriver it will I believe do what you need. Do not be concerned that the link is to a LED driver as it essentially performs the same function. Let me know if you need any other information, good luck!
Also see my video on using the "LED Driver" as a battery charger : th-cam.com/video/zTxiflmyeU4/w-d-xo.html
I recently started using this one which you may find useful : 4S 30A 16.8V Li-ion Battery BMS with Balance bit.ly/4SBMS_Bal
Looking at your battery it would seem that the cell on the left (looking at pack from the back where the BMS is mounted) would read a voltage of 4.2v, and the cell next to it (right) would read a higher voltage of 8.4v because it is in series with the first cell. What I do not understand is why you would connect the lower voltage cell (4.2v) to the VH terminal. Wouldn't you want to connect that to VM? (assuming that VH means volt-high, and VM means volt-medium). Just curious as I was mapping this out for my pack it seemed a bit counterintuitive. Please let me know your thoughts... Thank you!
Hi Michael, The cell on the left is the positive for the whole battery and this is why it is connected to VH. So yes the cells are in series but go from right to left i.e. 4.2v then 8.4v. You can also modify the board to work with 4 cells as I show in this video: th-cam.com/video/sZOlD9pzaQM/w-d-xo.html
Hope that clarifies things and ask more questions if you need to. Thanks.
Thank you for your quick reply! I think I understand now. I was measuring voltage from the positive lead to the negative lead on the first cell. When I watched your other video, I see that you measure voltage from the last (negative) cell to the negative terminal on the first cell, thereby obtaining 8.4v. I guess I was approaching it entirely wrong. Thank you for helping clarify that for me!
As Einstein says it's all relative!!
Hi. Thank for the video. I have a board like yours. May i use it for 2s battery?
Hello, you cannot use it with only 2 cells, it is designed for use with 3.
1nformatica Thanks for information
Did you have to do anything to get this board to start up? I have a very similar board and I get no output at P+ and P- but voltage at B+ and B- are normal.
Normally you should see the same voltage on P+ P- as B+ B-. What happens if you apply the charging voltage to P+ P-? You should be able to measure current flowing into the cells and the voltage rising. The only time P+ P- are disconnected is if a fault condition exists. Perhaps the cells are too far discharged or there is a short circuit somewhere?
@@1nformatica I applied charging voltage to P+ and P- and see no change to the battery voltage and there is no current being drawn by the board. The datasheet for the IC shows a shutdown condition for over discharge but I checked pin voltages and the don't meet the shutdown criteria. I will keep checking things...
Very strange. Does the board have balance circuit? Sometimes the labeling of the cells can be misleading.
Helpful but i have some questions if you have time to answer.
1) Some 18650 batterys have builton protection circuit.This means that if i want to build a battery pack with that cells i do not need protection board?
2) How to choose the correct protection board when building battery packs.What to consider?For example i try to build a 12 v battery pack with 9-11ah capacity.Should i choose a board who has output 10ah,15ah,30ah .What is better?
Hi Niklas, thanks for the questions. For number one the built in protection should have Overcharge detection, Over discharge detection and Overcurrent protection. If it has all these features you do not need an additional protection board. For number two the important numbers to look at are the number of cells supported that is the voltage and the maximum current it can pass. Note that this is just Amps not Amp hours (Ah). You need to choose a protection board that will pass the amount of current your load will take. A bigger number is not a problem but will be more expensive. Hope that helps.
so if i connect to that battery12v 10ah, 2 electric machines which i do not know the ah of each one but i know that they need totally 20 watts and an inverter 12v-240ac 300watt will this battery last for 4-5 hours or less because of the inverter?
20 Watts at 12 volts is 1.7 Amps. So 10 Ah battery should last 5.9 Hours. There will be losses due to the inverter which depends on type. High quality sine wave inverters are rated at 90-95% efficiency. Lower quality modified sine wave inverters are less efficient - 75-85%. So worst case 75% of 5.9 is 4.5 hours I think. Efficiency is also a factor of output power see this link: www.e-education.psu.edu/eme812/node/738 I would just try it and time the result!
thank you so much sir for the precious information you gave me.liked and subscribed
1nformatica one last question inverters exhept from efficiency doesn't have current draw?
i have a 12v solar panel. but on sun it gets to 14 v. is it a problem to charge with it ?
Hi, It is not an ideal solution. It depends for how long you think it will be over 12.6 volts which should be the maximum. But we are using a battery protection board which is designed to prevent over charging so it should not be a problem, the board will effectively disconnect the cells from the solar panel if it senses the cells are overcharged. Worth experimenting with especially if you have some "free" cells as it show in another video: th-cam.com/video/DU0vQd3Y8Jg/w-d-xo.html
1nformatica i am using this board
www.google.bg/search?q=18650+battery+protection+board&client=ms-opera-mobile&site=webhp&prmd=ivn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjt6viUxKzVAhXCUhQKHUSdB8QQ_AUICSgB&biw=360&bih=521&dpr=3#q=18650+battery+protection+board+3s&tbm=isch&tbs=rimg:CQ_1l2rHyr6VCIkDq2oq-RFUNi0X7fMvMu8ywXoBL5g671_1aEee7UgMIKuGed2JUwfvJiqTNZAwsz89ZxSGhDMe6zlXrQkhLuuhw3KhIJ6tqKvkRVDYsRtqPa5AYe5tYqEglF-3zLzLvMsBEmScoKHQoz4CoSCV6AS-YOu9f2EUjyMQG1x1eOKhIJhHnu1IDCCrgRwoyLoa4iQPsqEglnndiVMH7yYhG8xXiMR9CxwyoSCakzWQMLM_1PWET1WQKEUI3JEKhIJcUhoQzHus5URL5e0OC-OcAIqEgl60JIS7rocNxHmE366FBjzMg%3D%3D&imgrc=D-XasfKvpUKDuM:
This is the board
Hi, it is a different board to the one I tested. Sorry I can not advise you about it.
hey nice video :) sry.. my english is not the best...so i didnt understand everything but i just bought a circuit board like this and i cant figure out how much voltage i have to put in the circuit board ? i bought a 2s 3s and 4s board, do i have to put the voltage in exactly like the output for the li-ions ???
Hi, The answer depends on the type of cells you are using. Try and find a datasheet for the cells and it will tell you the charging voltage. In my video you can see that one of the cells shows a part number, google this and you can find the data sheet. The cells I am using are 3.7 volts nominal with a charge voltage of 4.2 volts per cell. So for three cells the input voltage is 3 * 4.2 = 12.6 volts. This can be seen in the video th-cam.com/video/miDIXwACpcY/w-d-xo.html
heyy coool thanks for reply.. :D my cells have 4.2 charging voltage too... does it have to be exactly 12,6 input ?? or can i use for exampel a 16 volt DC power supply ?...
this is my second account BtW.
tischschwein You should be close to 12.6 volts to avoid overcharging the cells. Of course this is exactly what the protection board is for! You should also limit the current. I suggest using a step down DC voltage board like this one th-cam.com/video/zTxiflmyeU4/w-d-xo.html
ok .. i find some step down dc voltage boards on ebay..i think i can manage it.... many many thx and keep up the good work :)
P.s. i will subscribe to you channel
Is the charging connector the same as the power meter connector?
Yes, there is only one connector.
Thank you very much. I thought that two cables were needed to charge/test the battery pack and another two cables were needed to power supply the used machine.
From the looks of it, when your device is turned off, the batteries will still be connected with the protection board, and draw a little amount of current. So if you don't use the device for a while, your batteries will be depleted untill the protection board kicks in at +/- 3 V per cell.
Am I right?
Yes, that is correct. From the controller chip data sheet it consumes a maximum of 0.1 micro amps during power down. I have put a link to the data sheet in the description. This is the same for all protected cell packs for example in a laptop. This is why if you watch my video on recovering cells from old laptop packs you can still find cells with over 3 volts even if they have not been charged for months if not years! You can watch the video is here th-cam.com/video/DU0vQd3Y8Jg/w-d-xo.html
Thanks for your reply. Looking at your own observation (8:40): voltage drop from 12.46V to 11.8V "overnight', suggests that the current must be (far) over 0.1 micro-amps during power down.
The cells I was using are recovered ones that were still being evaluated. I would not expect he same from known "good" cells.
great and informative thanks 😆
To find FREE batteries to use check out my other video: th-cam.com/video/DU0vQd3Y8Jg/w-d-xo.html
Uploader ,
would u pls ans these questions :
1) Is there any BMS tht u knw which cuts off th power 💪 when each cell is discharged @ 3 volt?
2) Can we choose th "cut off" voltage of any BMS ?
3) BMS can be directly used for 3 cell balance charging ?
If u or anybody kindly reply to answer , wld remain grateful. Thanks.
Hi, the module in this review is based on the 8254A IC data sheet datasheet.sii-ic.com/en/battery_protection/S8254A_E.pdf You can see in the data sheet a table of all the various types accoring to there preset parameters. The device on this board is "8254AAN" that corresponds to a discharge detection voltage of 2.5 volts, see this link : 3S Li-ion Lithium Battery Protection Board bit.ly/3SLipoProt You would need to source a different board or change the chip. I do not know of any programmable BMS boards. Strictly speaking this board will not balance cells and needs to be used in conjunction with a current limiting supply. Hope that helps!!
uploader,
Thanks for yr reply.
1) how I m going to balance charge th 3 cell package when this BMS is wired with it? As u mentioned it does not do balance charge.
2) If discharge cut off voltage is 2.5 , for ths BMS it is no good coz th cell will be damaged once bellow 3 volt. Wht u wld say?
Thanks. .actually I need sme knowledge . :-D
Hello, If cells are matched in capacity and voltage and not abused they should rarely need to be balanced. Out of balance packs are usually seen in RC model packs where they are subjected to very high discharge rates. That is why RC modelers use packs with balance leads attached and special chargers. BMS is normally only used for relatively low currents in power supplies for electronic equipment etc. I build packs normally using battery holders so it would not be a problem to occasionally remove the cells and put them on a balance charger.
With regard to the cutoff voltage 2.5 volts should not be a problem and is often shown in manufactures data sheets as in this link: www.orbtronic.com/content/Datasheet-specs-Sanyo-Panasonic-NCR18650GA-3500mah.pdf
You might like to watch my other videos on testing lithium cells: th-cam.com/video/DU0vQd3Y8Jg/w-d-xo.html capacity test: th-cam.com/video/_lDRud-Ehjw/w-d-xo.html
1nformatica
Dear uploader,
I checked th data sheet, bt did not really get tht mch abt maximum discharge voltage. If understood th graph , it is above 2.5 volt it saying . Bt all we used to knw 18650 child never be discharged more than 3 volts and many devices (in RC world) available, starts beeping @ 3.3 volt.
Do u not think every time discharging th 18650 upto 2.3 or 2.5 volt hurts th battery? Then these boards r simply rubbish .:-)
Hi, If you look at the discharge curve in the Sanyo - Panasonic data sheet you can see at the top is says "Discharge:CC:2A, 4A, 6A, 8A,10A to 2.5V at 25℃" 2.5 volts is the cutoff voltage at which point the load is removed and the cell voltage will quickly recover to over 3 volts. Sanyo - Panasonic would not do this if it damaged the cells.
bang good. sounds like a dodgy website...
Yes, I would advise caution if Googling that!! I do not know how Asian firms come up with these names. I still remember the now famous "LG" when they used their original full name Lucky-GoldStar. I kid you not!