How to build an 18650 Lithium Battery Pack with BMS.

THIS VIDEO CAN BE SEEN WITHOUT MUSIC HERE: • How to Build a 3s 1865...
This video is about how to Build an 12.6v 18650 lithium Battery pack for an electric bike or solar generator or a small Tesla Power Wall. In this video I will be using authentic Samsung 25r 18650 lithium batteries. I am building a 3s 8p 20ah 12.6v battery pack.
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BMS 25a in this video: amzn.to/2KMcKHK
This video shot and edited by Derek Smith
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Music
Hitting the Streets - JR Tundra
Half Pipe - Huma Huma
Free Dog - Silent Partner

[@WesThatTechGuy]

THIS VIDEO CAN BE SEEN WITHOUT MUSIC HERE: kzbin.info/www/bejne/ppCrhalsismad7s

[@nayBobb]

Still has music😂

[@blank.24]

8p? Isnt amp is 20 for each sell and its 20×8? 160amp? So the bms take the 160 and convert to 20/25? I dont get it...

[@oisann8223]

hey can i do this with a 4s if so can i contact you?

[@markrobinson9876]

Interesting. I want to make one myself..But I wish there was a video showing you how to actually make a battery pack. I have searched 100s of videos and they are all the same. Add the batteries, add the BMS board and it's done!!! Which wire goes where? On the BMS what is P+ P- Exactly where and why? What is the tape you use? If this video was an hour long and it took you step by step for dummies. I would watch the whole thing.! 🙂

[@MrZhyk94]

Same 😂

[@petrv.6851]

Precise work, thumbs up. Which pins are used fot charging and which for load? Thx

[@WesThatTechGuy]

B- and B+

[@michael12nonan]

This is also my question. Why didnt you solder a wire for charging?

[@nikolaosberatlis3942]

I would like to make a 3S1P using 3 18650 batteries. The batteries are protected, do I need a PCB in this case?

[@WesThatTechGuy]

they will be ok with the protection board for discharge but not sure about charging them. those cells with the bms built in are not too reliable however.

[@14kukucka]

Isn’t this BAD for individual cell Because they ar not same in meaning of charging and discharging?

[@WesThatTechGuy]

they are the same and this is a balance BMS? Not sure what you're trying to say?

[@medianb]

How dafq do you charge this?

[@WesThatTechGuy]

12.6v li-ion battery charger

[@ponkuna]

I have subscribed and watching all your nice videos. I have 3 cheaper PWM controllers and the last one I bought this Perfect Suiter PWM controller. I have 300W- 24 V solar panels I have bought over 100 recycled laptop batteries and spent hundreds of hours in charging and discharging with smart chargers and Imax B6 charger. I have made 5 battery packs starting from 3S 5P to 4s 15P packs. I just finished building my first 7S 21P battery pack. But my cheaper blue PWM and this Perfect suiter controllers are charging my 4S packs up to 13.7V only and stops there. my 4S pack can receive up to 16 .8V but I do not understand how to do that. I am frustrated and in a desperate situation. My 13.7V packs work for a few hours only and dying. Please guide me and many thanks for your help.

[@WesThatTechGuy]

what brand is the cheaper blue PWM controller? Can it charge to 16.8v and if so you will need to program it to do so. It's best if you can afford to get an MPPT controller. This will help too. It could be that your controller is just bad or needs programming. Hard to say without know what controller how many amps and volts etc. Hope this helps.

[@ponkuna]

I am back. Subscribed. Sorry and thanks.

[@WesThatTechGuy]

thanks! no problem. glad to have you!

[@fiazshah3838]

Is a bms really necessary. I've built a 24v pack from old laptop batteries and I've added a small volt meter to asses the voltage at all times.

[@WesThatTechGuy]

Depends on the application and the amount of energy being put into and taken out of the battery pack. People have their own opinions on this subject but safety is a key issue when using a BMS, if you can or want to constantly be looking over your shoulder while using the pack then don't use the BMS but if y9ou want to enjoy your nights sleep you might want the BMS.

[@fiazshah3838]

@@WesThatTechGuy it's for a kids electric scooter. I agree, the Bms would satisfy my safety concerns. I've ordered one, a 24v 6s bms. If I put 30v through the bms, would it still limit the battery to 25v?

[@WesThatTechGuy]

If you put 30v to a 25v bms the bms will shut down the charge once it reaches the 25v. the purpose of the BMS is to protect the battery from being over charged.

[@AviAceC130]

The music was a perfect touch

[@Evocatorum]

Good one!

[@francislerio495]

hi is that possible can i order from you a 12s12p battery pack

[@WesThatTechGuy]

Yes! go to www.SolarGeni.com. give me a call and I can build whatever you need.

[@sridharnaidukolluru1920]

What is the cost of cell and where it will available in low prices

[@3d-speakers945]

€3-5

[@3d-speakers945]

Depending on the quality and the maximum discharge it can handle

[@WesThatTechGuy]

you can get them at SolarGeni.com

[@CH-py8zv]

What gauge wire did you use for soldering on to your battery pack, and where to buy this wire.

[@WesThatTechGuy]

on this build I used 10g silicone wire. You can find it on my website.

[@filipzamec9671]

That music is abysmall, but thanks for the video.

[@davearduini]

I love Abysmal, they rock! 😎

[@ricknelson947]

Awesome video, thanks for taking the time to share. A little constructive criticism. I would recommend a soldering iron with a little heavier tip. I also like to hit those larger joints with a flux pen to get a better solder flow. Your + and - connections looked maybe a little cold to me.

[@WesThatTechGuy]

Thanks for the insight!

[@DroneSurf]

I completely agree. I was suffering when I see the welding. Looks cold welded. I will not trust that weld.

[@richardsiu5129]

Everyone is asking how to charge but I cant for the life of me find the correct charger. Can you please send a link of a charger I could attach directly. Thanks

[@WesThatTechGuy]

12.6v li-ion battery charger. Go to the link and choose one of the 3s lithium battery chargers solargeni.com/index.php?route=product/category&path=61_72_74

[@seanmikhaels]

cool video!, what about balancing each cell?

[@seanmikhaels]

Mark Cooper Agree, there could be tons of improvements, but i think its a good start. That particular BMS has a high current shut off i believe, and short circuit protection built in, but always wouldn’t hurt to be 100% safe and add some fuses to protect each cell from blowing up.

[@Nitrxgen]

Well... that BMS is designed for 3S and he does actually connect it the way it's intended, for the most part, with 4 nickel strips connecting to each end set of parallels. You can't really balance each cell per parallel because... they're parallel, they're connected to each other. The length of each strip may impact how balanced it is over time but those nickel strips should be pretty good while I reckon. I'm not a fan of this particular video but I dunno if I can fault him that much. I would've done a better job attaching the BMS and output cables though. I would've gotten a less cheap BMS perhaps with the wires already attached.

[@hansturpyn5455]

@@Nitrxgen you can't ballance each cell but you can ballance each cell row. The 3 cell rows should be ballanced separately.

[@micharogalewicz6249]

Looks super clean but, as others note, mostly due to lacking charge balancing.

[@ustensmoco]

One question, if you were to build two battery packs with BMS, each one is 12V, can it be charged in series (24V)? since I have a 24V charger or do I have to get a 12V charger to charge them.

[@WesThatTechGuy]

The simple answer is no. Bms is usually will work in parallel but not always and series. You can connect them and series and try your charger worst-case it just won’t charge the bms Will stop the charger from turning on

[@ustensmoco]

@@WesThatTechGuy Ok thanks you :D

[@pb30869]

How would you charge this?

[@mansgottado]

Great info.. music ruins it though

[@wimm1392]

Awesome video, getting on with the job, just plain simple to understand. Thanks for sharing

[@WesThatTechGuy]

You're welcome!

[@gmmrk35]

Can you guide me Should i use 1.2v batteries of 4300mah for battery pack

[@WesThatTechGuy]

I would use 3.7v 18650 or 3.2v lifepo4 myself. 1.2v cells are generally not for any type of high power usage they are used mostly for small solar lights etc. 1.2v is a usually a AA battery cell if memory serves.

[@paulhetherington3854]

And it's, upsidedown-- are you, blind-- deaf?

[@gmmrk35]

@naly Hwang right

[@HelamanGile]

I need to make a 48 volt battery pack I have a 108 18 650 cells

[@justfly2010]

Love your videos...You should also consider making a 12 Volt 18650 battery pack for cars/boats and motorcycle with best available bms and some bms with remote Bluetooth monitoring! ( Weather proof) Iam sure there are so many cars and motorcycle restoration guys would love to see. Just saying. 👍

[@WesThatTechGuy]

These can be found on our website.

[@tracym427]

Voltages are a little off with Lipo/Li-ion. LiFepo4 works out better for car,boat, moto

[@MaxGoddur]

Where did you get the spot welder and other parts used in this video?

[@brandenmuirhead8988]

I'd like to learn more about your spot welder. Is it a DIY welder or a shop bought one? Many thanks

[@ecorico22]

It should be a purchased item. Looks similar to a sunkko 737g+ . You can find it on Amazon

[@E-BikingAdventures]

Why use nickel for this? It's only 22% as conductive as copper and it's more expensive.

[@WesThatTechGuy]

nickels is simple, easy and cheap. It also doesn't corrode like copper. Been done this way for many years around the world. In a bigger app then copper WOULD be used.

[@donaldsmith3048]

The music sometimes makes it hard to hear and understand you!

[@WesThatTechGuy]

sorry for this! It won't happen again!

[@WesThatTechGuy]

I have uploaded a new version of the video with the music turned way down. Just launched it yesterday.

[@dogbog99]

Autistic?

[@marshalltjones]

So I just built a 3S pack (only 3 cells). The cells each measure 3.5 V (new, but not fully charged). When I measure the cells in series, I get 10.5V (not fully charged). When I measure off the power leads, I get 7.8 V. Do I have a bad board, or do I just need to charge it? Kinda afraid to apply power to it .....

[@WesThatTechGuy]

are you using a balance BMS? is so you most likely connected the balance leads wrong.

[@talhanaseer2404]

How do you wire BMS?Please explain it or give some link.

[@maazahmed9010]

What do you mean?

[@keith1585]

Soldering looks a bit dodgy but still an awesome video.

[@MaxMax-wy7bi]

So did I get it right that I can also use this BMS but with 3S2P?

[@WesThatTechGuy]

Yes you can. Any 3s config up to limitless Parallel

[@sreekumarUSA]

Thank you once again for the video. Some time back I requested a few info from you. Perhaps amidst the busy schedule you’d have overlooked, which is understandable. Here are the requests once again, kindly respond. 1) Do you sell PURE (99.6%) Nickel strips for 2P design through your AMAZON store? If so, please point to that link. If not please recommend a HONEST Vender who sells the same. 2) The Spot welding on those batteries look so perfect. I’m sure that welding machine must be a SUNKKO. What model is that and do you sell the same model, through your AMAZON store? FYI I use SUNKKO 788H that is so useless, that the welded Ni strip can be peeled off very easily. Any help from your side will be highly appreciated. Thanks and regards. Sree...

[@WesThatTechGuy]

sorry for the lost reply.heres a link for the 2p nickel strip: amzn.to/2GxxLXc Yes its a Sunkko 709A. Heres a link: amzn.to/2IjHBhf I have on SolarGeni.com Amazon store too.

[@bradmiller9993]

Ok dumb question: how do you figure 12.6 volts using a 3s configuration @3.7 volts each? I want to build a small 12v 18650 battery for my teardrop trailer with a solar panel on the roof; wouldn't 4s be better? Thanks!

[@WesThatTechGuy]

Nominal voltage is 11.1 V charge voltage is 12.6 V.

[@WesThatTechGuy]

Nominal voltage is 11.1 V charge voltage is 12.6 V.

[@WesThatTechGuy]

Nominal voltage is 11.1 V charge voltage is 12.6 V.

[@KetansaCreatesArt]

Hello Wes That Tech Guy, I made my first 3s batterypack few days ago. Using 3 x 4 = 12 cells. I did not solder or weld them. I used the spring loaded 3 cell plastic containers, and glued them back to back opposite directions. No cell touches eachother. But from the top and bottom I attached lot of wires, positives, negatives, and balance wires that goes together to the BMS at one end. Then I ducktaped the whole thing. I am using it to run powerful 100watt LEDs on my bike. Is it safe so far?

[@oli236]

For your configuration you must check the maximum discharge current of your cells, in your case it must be at least 10A. Hoping the connectors won't melt obliviously

[@KetansaCreatesArt]

@@oli236 , Hello. It worked and I used it for few months. Then I dismantled it and spot welded it with proper method. Thank you for the reply 🙂🙂🙂

[@colinfshoell]

Where do you get your parts?

[@WesThatTechGuy]

the batteries from Samsung and we have the bms' made for us. you can get them on our website. solargeni.com

[@ON3PDM]

Hi, Could you tell me if you charge the batteries via the BMS board or how do you charge and with what equipment.

[@kotsios1234567]

The way you attached the power out wires was really disturbing for me!

[@WesThatTechGuy]

Any advice would be appreciated! Can you give me some pointers maybe?

[@kotsios1234567]

@@WesThatTechGuy It is just me! I am taking soldering wires as a bit of an art! But i would twist the wires before hand fill them up with good fresh solder then fill up the pads too and then just touch them on the pads and get them stuck round and nicelly on the bms!

[@kotsios1234567]

@@WesThatTechGuy basically fill up the wires with a good amount of solder and then put them on the bms! That would make a better placement and more secure too!

[@WesThatTechGuy]

Ya I filled them prior and soldered the board but they are pretty thick so they were a bit of a pain.

[@kotsios1234567]

@@WesThatTechGuy Working with such thick wires though requires a bit of a powerfull soldering iron since that thick wire dissipates the heat really fast. Dont know if that is the case with you.

[@videoalcion]

Hi can i make one for change the battery a motorcycle and in 12v 7amp

[@WesThatTechGuy]

Néstor Manuel Mases yes

[@Ziplock9000]

A few questions. What's the over and under voltage levels on this BMS? Does it actually do any balancing? Can you charge while a load is connected?

[@divikumar5475]

It got balancing resistor, it will take many cycles to balance

[@mefirst4266]

HELLO IT CAN NOT BALANCE AT ALL !!!!!!!!!!!!!!!!!!!!!@@divikumar5475

[@francisraman4400]

Thanks for the great video! Do you think this wud b good to start a motorcycle ? will i need a cap? Thanks

[@courmax]

Is it possible for you to manufacture for me a battery pack of 4 Li-on 18650 total of14,5 V 2500mAh with BMS. This is for my robot vacum cleaner. The company Vango is out of business so I can`t get supplies from them.

[@WesThatTechGuy]

Yes we can. Go to Solargeni.com give us a call or send us an email.

[@heenaagrawal8805]

Intro for headphone users be like: o____ o_____ ' _____o _____o Only legends will understand

[@anandagaming2171]

What is the right BMS for 4s 10p battery pack ......cells are 18650 3200mah .....what is the current rating of bms ??

[@WesThatTechGuy]

We have several current ratings to choose from. 25a, 45a, 60a, 100a all the way to 300a, you can find all of my BMS's here: solargeni.com/balance-bms. Not sure if your 4s is Lifepo4 or Lithium-ion but we have both.

[@cieloarauz8808]

Nice video but no explanation of battery connection positive/ - the average could get hurt not knowing what his soldering

[@JohanDegraeveAanscharius]

You are not controlling the state of each cell, so you just make the same mistake everyone does. Once one or more individual cells give it up, your battery is gone, leaving good cells out of order. This means you are just copying the bad habits of before. You NEED control of each cell individually.

[@WesThatTechGuy]

Johan, this is NOT so. If 1 cells goes out in the series the others will still work just fine. 1 has nothing to do with the other. This really isnt any difference than individually fused cells. So not sure what you're saying? Thanks for watching!

[@isrofimakruf5326]

I made 3S 8P with BMS like that. How many volts is the maximum input of a good charger. Thnks

[@tabineshhtc]

12.6V 100% full so charger must be 12.6V

[@kevin.campbell]

what a great website

[@frankpitochelli6786]

What do you use this for, and, the soldering was less than desirable.!!

[@WesThatTechGuy]

everything I can. Mostly energy storage. This was a fast solder and iron wasn't as Hot as I'd of liked. It is much better now post video. Can't me a master of all trades you know.

[@jorogoze]

La mía es igual en todo trate de cargarla con un panel solar y un controlador de carga mppt y solo cargo unos minutos luego desconecta la carga que podrá ser

[@WesThatTechGuy]

cárguelo a 12.6v y use un BMS.

[@realtygeekph3656]

Whats the maximum number of batteries i can use for 1 BMS?

[@AndrewMurphy8383]

that depends on how many cells you going use i would say i would only use as many cells that bms is use for like 6s bms i would only use 6 18650s

[@grahamhardyvanlife5704]

You never said what size wire you used to attack to the bms board? I would hate to use wire to small and cause a fire :(

[@WesThatTechGuy]

I used 10g for this build as its a small pack with only an assumed 20a continuous discharge.

[@richpagan2825]

Where did you get spot welder? Or did you make your own? Great video

[@WesThatTechGuy]

Got it on Amazon. Thanks

[@francisguchie1973]

very nice and simple video. I would like to do a 12volt 14ah pack how many cells do i need

[@WesThatTechGuy]

Thanks! 6p3s would be 15ah. 18 cells

[@jakesnake253]

I just started watching vids like this. I have no idea what the next step is though. I would really like to see what you do with it

[@captainyak3948]

I built mine from this video and I use it for my Kayak fish finder. It last a lot longer than lead acid + it's easy to carry around (doesn't weight much)

[@mmaboxingko4298]

Jake Shepard I am on the same page as you, i can’t find a full video to see if they add a USB port on it or a AC port or something so it can be used as a big power bank. I’m confused too

[@vickisabella130]

Love your video man trying to build a 36 volt 12 amp battery do you have any idea how to start do u have any diagram how to complete it and doing it for my scooter look a lot of video but could not figure it out half of this are cut out the main part of it the video Spell greatly appreciate your help thanks

[@WesThatTechGuy]

Thanks! I don't have one now per say but if you follow this build video and just do 10s its exactly the same. Just keep adding groups of cells so you have a 10s4-5p depending on the mah of the cells you use.

[@ecchstore2939]

You forgot the short circuit preventer rings to all of the batteries's positive side.

[@WesThatTechGuy]

This is not done on all battery builds. We now have them available and use them but in the past they were never used by any manufacturers that's what the BMS is for to help with issues.

[@joshbatman]

Nice Video, just the music in the background is very distracting- other than that good tutorial Video. Thanks

[@WesThatTechGuy]

Ok thanks!

[@raygilfillan]

an excellent straight to the point video with no distractions and presented by someone not trying to be a comedian, brilliant.

[@WesThatTechGuy]

Thanks

[@amd4lyfe]

Can a connect two battery packs one chinese syncpower the other an lg battery pack together they are both 52volts the syncpower is 18ah while the lg is 23ah. I need more mileage so i need to connect an external battery pack to my scooter's internal battery

[@WesThatTechGuy]

As long as they are the same voltage you will be fine. Be sure to connect them to parallel.

[@TheAerodromeStudio]

the music is VERY distracting while you are talking. The music volume is way louder than your voice.

[@WesThatTechGuy]

Ya been told this before. It will NEVER happen again lol. Sorry

[@pavithragurusamy6887]

Thanks for video 3.7v 10ah lithium polymer battery what BMS use 3s please tell me sir 12v 10ah

[@WesThatTechGuy]

You're welcome. Thanks for watching! You would make it half the size. 12 cells... 4p3s

[@comedianmattrossey]

Hi Wes, I just found your channel and this video. I love the battery you built in this video and am wondering if you can help me? I live in Toronto, Canada. Finding LiOn battery building equipment and supplies here is proving to be very difficult. I have an electric Chopper motorbike that I bought. It's made in China, like everything! The batteries that came with the bike are lead acid, had great power, they are a combined 72Volts. I need to replace the batteries completely. Ive had the bike for 4 years, this year I wasn't able to drive it because of trying to get batteries because of covid was incredibly difficult, and when they were available the cost was stupid. Since I bought the bike I have thought that LiOn would be a much better power source and have wanted to switch over, but the cost to buy the batteries needed is incredible if I buy them already built, which is posing to be one of the biggest problems yet. Noone seems to manufacture 72V batteries, so, I'm thinking to build it myself. However I have no experience in building batteries, and don't want to screw my bike up. I also want to install a regenerating system so that as I drive the motion of driving could generate electricity that could simultaneously charge while driving. Again, having no experience in this I need help. The help I'm needing is: 1. Where can I get the supplies to build the battery for the bike? 2. Where can I get the info on building the battery? 3. Will I need to build a charger or is there something on the market I can buy for charging the battery? 4. And finally, how would I go about building a motion operated regenerating system that can be easily attached to the bike? Any help you can give would be greatly appreciated! Thank You! -Matt

[@WesThatTechGuy]

Matt thanks for watching. l can help with everything you need. I have all the necessary components to do the job. Check me out at SolarGeni.com

[@kusmanasafri1354]

Can two 12V battery packs in series become 24V and can batteries in series be charged with a voltage of 24V. Thanks.

[@WesThatTechGuy]

Yes They can.

[@karoma7898]

Are you gonna pump 25A on that thin bare copper trace on the PCB? Won't it track? Aren't those solder joint gonna melt?

[@WesThatTechGuy]

Yes with no problems. I’ve been using this battery for a year or two now with no problems.

[@praisemonday4821]

Please what bms board can u recommend for 50amp battery pack and can also supports fast charging.. max of an hour

[@WesThatTechGuy]

Check out our website solargeni.com

[@klowranc]

Why didn’t you explain anything in the video? What was the circuit board for? Why kapton tape? Etc..

[@WesThatTechGuy]

I thought it was covered pretty well. the circuit board is a BMS and the Kapton tape is for protection against direct short.

[@fraaggl]

Aren''t you afraid that the batteries in parallel could not be charge properly knowing that the bms doesnt have the voltage of each cells ?

[@WesThatTechGuy]

the bms does have the voltage of each series of cells. either way the series won't exceed the required voltage. the cells will balance themselves out between the series. You can't affordably or even effectively balance each cell in a pack like this. You can however for a simple 13s or 15s ebike pack because they are built in series not parallel. 1p13s etc. If this was a pack like that then YES each cell would be monitored. I have 300a BMS that's the size of a cake and it doesn't even balance every cell only every series of cells.

[@fraaggl]

I want to replace the battery on my elec scooter. 48v, i have planned to buy lifepo4 32700 batteries and make 8 group of 4s and a "40a 4s BMS" for each group. IS that what you would do ? I couldn't find lifepo 8s BMS...

[@tordherflower]

NICE VIDEO.ITS HELP ME A LOT,THANX

[@djillalisibachir584]

Hi i have question about my BMS 10S -Whent I measure the voltage between S1 and S10 .I find 37 V but the output the BMS to motor I find average 24 V Please where is the problem?

[@WesThatTechGuy]

too many variables to answer here. Check your balance leads. also some BMS will show incorrect voltage if the balance leads are not correctly wired in series.

[@AMXM-do5kw]

Parallel battery connection.?

[@WesThatTechGuy]

Yes 8 in parallel and 3 in series

[@maxthepiguy3658]

Do you use the same wires to charge the batteries and to power a device? Could we have two plugs? One to charge and one to power the device?

[@WesThatTechGuy]

Yes it does. This is a common port BMS, You could add another positive wire to have 1 for load and 1 for charge so you don't have to unplug to charge. Or you can get a dual port BMS. 1 for charge and 1 for load.

[@SrikanthOfficial]

Hello Can you please help me with diagram structure to build 48v 40 ah battery pack for my e bike

[@WesThatTechGuy]

Go to Solargeni.com and fill out the contact me form and I can send you one

[@Stampy36]

Wes, is it possible to make this solar charger ready? I can't find anything online

[@WesThatTechGuy]

Yes it is. do a amazon or ebay search for a lithium solar controller. Most solar controllers are programmable to match the li-ion voltage.

[@Stampy36]

@@WesThatTechGuy Wes, I'm building this now. Do I need a specific li-ion charger? Or it doesn't matter because of the bms?

[@krishnagupta9667]

I had made a lithium ion battery pack rating 14.6v 30a with the same type of bms (30a).can I charge it with a 14.6v 3a smps or i need a same rated lithium battery charger.please reply fast

[@WesThatTechGuy]

Techno India You will need a 4S charger at 16.8 V. The 12.6 V charger will not charge the battery at all. 4s nominal is 14.8 V. Fully charged is 16.8 V

[@krishnagupta9667]

@@WesThatTechGuy can i charge it with a 16.8v 3a common smps

[@stmarshall87]

Is it possible to create a 14.4Vdc 300+ watt hour battery pack with this method?

[@WesThatTechGuy]

stmarshall87 yes with lifepo4 battery’s

[@KALUGARLABAN]

Nice bro good tuturial.new frnd her

[@grahambateman3399]

Wondering if you help done this one side is showing 0.12 & the other side is showing 0.8.0 why is this thanks

[@WesThatTechGuy]

more info please? what type of battery and what exactly are you talking about.

[@izifaddag8221]

I really like this idea but maybe I am missing something. You have 3 x 18650's in series which is going to give you 3 x 3.2 volts. That is 9.6 volts. How do you manage to get 12.6 volts?? I can only guess the BMS circuit is converting to 12.6 volts, is that correct? Sorry I am confused easily, forgive me.

[@Sugurain]

Most lithium cells are rated for 3.6 or 3.7V, but when they're fully charged they usually reach 4.2V.

[@SouthFlaDiver]

I agree, 18650 are lithium phosphate 3.2 nominal voltage, where lithium polymer is 3.8v nominal 4.2v max charge. People use 4s lithium phosphate in place if 12v lead acid It seems you charged these LiFe batteries as LiPo

[@WesThatTechGuy]

when battery is charged (which you must do) its 12.6v

[@jaredjones846]

Is there such thing as a 8s bms? 8s4p??

[@WesThatTechGuy]

jared jones yes we have them at SolarGeni

[@maenikseu]

What is the recomended battery charger voltage for this type of power wall ? 12/24 v ?

[@WesThatTechGuy]

12v

[@maenikseu]

Thank you

[@WesThatTechGuy]

solargeni.com/battery-chargers/12.6v-3s-5a-lithium-battery-charger-tesla-power-wall-s120

[@rechiealvarez3985]

Sir i love this video.. I made also 3s battery.. But the input power is my problem.. Can i use input only 5v from the cellphone charger only..

[@WesThatTechGuy]

Thanks. No you must use a charger that is 12v li-ion. Max charger input 12.6v

[@rechiealvarez3985]

@@WesThatTechGuy thank u sir.. For answer my question.. Im pilipino.. But here in philipines.. But i love electronics... Because i want to put on the bluetooth speaker 12v amplifier..

[@KIAPETE1911]

Probably a stupid question but can you charge the batteries on the load out wire, If so what voltage and amperage. Could I use a laptop socket, and charge them from a laptop plug??

[@WesThatTechGuy]

No stupid questions! Yes this is known as a common port BMS, you use the same port for charge and discharge. 12.6v max charge. 11.1v nominal. Yes a laptop power supply would work if 12.6v

[@KIAPETE1911]

@@WesThatTechGuy What would you recommend? I want a USB power bank for a phone and tablet.. Im using 14 (18650 Q30) cells in parallel (42Ah). I'm aware i could connect that to a Normal USB out board with a micro usb charge port but the charging times would be horrific and not good for the batteries i assume. so was looking at BMS, so i could wire in a better charging source. There seems to be alot of miss information or just bad advice its a mine field. any tips would be helpful as im starting out. Unless there is a better way that you can suggest.. Thanks for replying!

[@raisagorbachov]

If you're using 18650s as a 10AH 12v battery pack on a solar charge controller system, do you still need a BMS?

[@WesThatTechGuy]

its best to use a BMS

[@raisagorbachov]

@@WesThatTechGuy Would it be better then to buy cells with BMS built in? That way a 20AH pack could be built easily

[@ohiohamguy]

So how would you charge that pack?

[@WesThatTechGuy]

with this: solargeni.com/battery-chargers/12.6v-3s-5a-lithium-battery-charger-tesla-power-wall-s120

[@modularliving1024]

You mean 11.1v pack . 12.6v is the charging voltage

[@WesThatTechGuy]

Modular Living yes thats correct

[@lilvirtt3577]

Does it change anything if I solder instead of spot welding?

[@WesThatTechGuy]

Nope not at all as long as you do it right.

[@damguru5625]

Wondering if I can get some help with a 4s 5p battery I have built. The BMS looks identical to the one in this video. I am charging at 17v 0.5amps and cant seem to engage the cuttoff. Not sure whats the highest point each cell could hit. On my last charge I had some hit 4.246 before I unplugged. Wondering if I'm ok to let it go ? or if I am charging it wrong... also the battery has a live load while its charging...not sure if that makes a difference. But its pulling minimal from the battery during the charge. Any help would be greatly appreciated. thanks

[@WesThatTechGuy]

DAM Guru I would try another bms. And make sure you have the proper charger

[@WesThatTechGuy]

17 V is too high for a 4s pack. Max is 16.8 V

[@damguru5625]

@@WesThatTechGuy ok I will give that ok....much appreciated

[@mahmoudhabib4322]

hi .. How do I design a charger for a high voltage 12 volt battery, for example 50 amps for a car lithium emergency battery

[@WesThatTechGuy]

Not sure how to explain how to design or build a charger but we sell the one you need at SolarGeni.com

[@rahatrahat1392]

Lovely video, can you make a video using 30 sells 3.7 voltage, for 12 voltage using BMS

[@garyscott982]

I’m a complete newbie. What is a BMS. Thx.

[@WesThatTechGuy]

Battery management system

[@ednaldopereira7968]

com 24v 20ah

[@118madhuabhi]

Good job I want more videos how to integrate batteries to vehicles

[@3660ianw]

Informative video but hard to hear with that shit music in the back ground.

[@WesThatTechGuy]

when battery is charged (which you must do) its 12.6v

[@edwinkania5286]

Thumbs up for the kick ass music!!!!!

[@maulanawahyudi7127]

Can I charge the batteries with BMS too ? or it just output

[@WesThatTechGuy]

Yes. Is both input and output terminals

[@rabbu188]

Can the battery be charged using BMS or separate module is required for the charging? if yes can you make video/schematic diagram for the same , how to connect charging kit to BMS

[@WesThatTechGuy]

yes it can be charged using the BMS or can just be balance charged. I will upload a schematic on my site soon. sorry for the delay on this

[@pwm001]

Awesome video. So does this mean 5 of these in parallel would be the equivalent of a Battle Born 12v 100Ah battery?

[@WesThatTechGuy]

Yes thats correct. Or you could just make it bigger.

[@pwm001]

@@WesThatTechGuy Wow! That's cool. Now I'm off to read more about how to design one just like that. Thanks for you quick reply! Keep up the fantastic work!

[@stephenlemler4014]

I'm thinking of trying to build a 100ah battery to do this I would need 120 cells correct ?

[@justfly2010]

Hi love your videos and subbed! Could you please tell me If this battery setup would work on my old suzuki drz 400 motorcycle which has a lead acid battery 12volts and 7 ah. Can I crank safely with out hurting the bms or the batteries? And do I need any other changes on my motorcycle? I know my regulator/rectifier puts out about 12 to 13.5 volts as acceleration increases will there be any fail on bms charging? Since change in voltage. Sorry to bother you with too many questions but this battery looks promising. Thanks for your help much appreciated.

[@WesThatTechGuy]

thanks for watching and subbing! this should be ok to crank but not sure about the amperage of your regulator. You would need to know the max amperage output of your regulator. this pack will handle an easy 200a discharge but the bms is to small for that. Hope this helps.

[@induvishwakarma8962]

How many charging voltage? Please answer me!

[@WesThatTechGuy]

12.6 V. You need a 3S lithium ion battery charger

[@MrIcemaxx]

Hi what power suply you using for charging.

[@WesThatTechGuy]

I use the 3s, 12.6v Lithium battery charger from SolarGeni

[@phuketexplorer]

Absolutely no indication of what the connections are - or where they're going to, or coming from. Wasted 7 minutes!