Balance leads on DIY Battery packs how to

[@mhk1058]

Brilliant, 7 years later and still the clearest explanation how to wire up a balance lead.

[@zups5]

100% I hate other videos, this is the clearest by far. None of the usual jargon or nonsense about your cat or dog. Loved it!

[@wyrick6869]

This did make more sense to me than most videos, for whatever reason. Thanks KTW.

[@julianazzopardi2718]

Mate, you are a legend! I've returned back to your video after some time to recall the info, your explanation is setup so well, making it easy for us to understand the process precisely ❤

[@solarnewbee7868]

Just wanted to say thanx for the info. Made myself a 4s today and without your help wood be lost on the balance lead hook-ups. Keep doin what your doin for us newbie's!!!

[@Siziksu]

Really great tutorial! This is the exact info I needed to do my DIY 3S 18650 balanced battery. Thanks a lot!

[@ryanmacewen511]

Great explanation on how these leads get wired. I'm old school NiCd RC fellow. I'm new to the Lipo scene. I was recently manually balance charging LiO 18650 cells in some Milwaukee packs which have sat for years unused, but new. I have a 4 cell (individual charging slots for 1 cell each) charger from the vape/flashlight market. I made some cell adapters to place into the charger with some test leads (j-hooks) to attach to tabs on assembled packs. The goal being to charge each cell individually with each port of the 4 port charger. I used this successfully to bring cells up to 4.2V each. However, I was only able to use one charge bay, and do it one cell at a time. I bought a different 8 cell charger (for loose cells), but it would fault out when more than one cell was connected. I made a bunch of blank cells with wire leads to place in charger bays. I'd like to try to use them all at once, as I have large 12ah tool packs I'd like to bring into balance. Would using diodes maybe help? I'd like to avoid removing tabs. Should I just break down and buy a hobby balance charger? lol I actually have a lot of 4s, 5s, 7s leads from other projects.

[@alirezabaniasad530]

Thank you very much for this excellent video . Could you please help me with my tenergy tb6b balance charger? I have lost the balance connectors and i need to charge three 18650 cells just like the video.but i don't know if i need to connect just these four cables ? Or the two red and black output port also? Thank you for your help

[@4714audirs6]

Simplicity is the key! Most of us, trying to make some simple battery stuffs is very usefull this kind of video. Great, Like!

[@xadionwc3]

can you do a 3s2p? exactly the same video but with 1 additional battery on each parallel.

[@felixlegendre2145]

im trying to make that same 3c setup (around 11.4V) but double the current in parallele is it possible without having a bmc?

[@Mstom178]

do you have to have the wire in the middle of the two battery cells? or can I place it more near one side vs in the middle of the two batteries cells?

[@lordango]

Best explanation for balance leads.

[@TIMSOFNVISHOUS]

Can you do a video of how to connect a balencer lead from a I charger x6 to a battery

[@MrsRabbit8]

Thank you! This is exactly what i was looking for.

[@MrBrymstond]

I heard both sides of this story from many people and although this works it less accurate because the leads are supposed to be far right is directly connected to negative and the rest go to the far positive end. But this works for me as well. Why I bring this up is because you can tap off of each of the batteries while connected in series by connecting a wire to the first battery positive and negative or connect to the first battery negative and second and the second battery positive and you will get 7.4v then connect the negative from the first battery and the last = 11.1v which leads me to believe the leads go to the far most positive and also leads me to believe there's a better method and it works perfect every time... The batteries that are wired in series will never balance out on their own so what I do is charge each battery pack individually... On a 3S I use a MPPT to charge each so I would use three separate isolated from the others by using three solar panels and they shut off when each reaches 4.2v and 12.6v total but as soon as I start to drain they start to charge and you can do this using 3 - 5v solar panels and 3 - charging modules... You can also do this by using 3 wall phone chargers connected to 3 TP4056 and it works, if you don't isolate each TP4056 by using 3 separate sources of power the chips will fry. Something to toss around.

[@DIYTechRepairs]

MrBrymstond note that this is not about solar and balancing a pack ;) its about adding balance contact for purposes like charging a pack with a balance charger. example rc or ev wehicles

[@raffman4266]

You are a very good teacher! Well done! Kudos to you sir!

[@RogerBY]

TY I just wired up 2s3p on imax b6 . I have 2 battery packs done now for ebike light. First balance was 4.2v and 4.11v and it brought them back in spec 4.2v 4.2v.

[@jokdigitalvideo]

Just what I needed thanks a lot .you have a new sub.

[@DIYTechRepairs]

Glad I could help

[@WaschyNumber1]

It's better to use correct cable colors, black for minus and red for plus, so it's easyer to see how to connect the balancer connector to the charger ect.

[@joshuanorris5860]

Thank you sir, this answered my question exactly :) Im going to get into soldering and make my own charging squids :)

[@laporpo78]

Thanks for the great tutorial. My question is if I use only 2 cells, can I use just the 3 wires excluding the last wire on the furthers left? The other thing is can I mix cells that are different in mAh (2400mAh & 2600mAh)?

[@MaxGoddur]

Can you recommend 14 lead wire harness and where to purchase for the BMS connector? Two routes to go purchase all the parts to make my own wire harness or just buy the pins, tool for removal of pins and crimping tool.

[@DIYTechRepairs]

14s jst contacts are very very rare to find. Best is to buy a cheap bms and then use a flat head smal screwdriver and move the pins.

[@fespinosa434]

Great video!!!! Thank you...please make more.

[@andrewadams20]

This perfectly explained what I needed to know, thank you!

[@bullwhip53]

Great video!

[@MrTomasekk]

Nice tutorial. I have one question - could be 4S/5S/6S balanced cable used for balancing 3 batteries? And if so, how to connect cables? Thank you for answer!

[@drabberfrog]

As long as you're going right to left on the balance cable connecting the batteries like the video showed then you should be fine. The balance cable doesn't have any controller inside that'll get mad it's just a little piece of copper and plastic.

[@TheRoadTaken]

I smashed the heck out of the like button!

[@93jdmmike]

Will this work with Nimh battery’s as well

[@DIYTechRepairs]

No. Wrong voltage. Nimh runs at 1.2v nominql

[@93jdmmike]

DIY Tech & Repairs I know it’s the wrong voltage I’m talking about The balance connector I make 5.5-6v nimh rechargeable battery packs with 4xAA battery can I add a balance connector

[@DIYTechRepairs]

@@93jdmmike sorry yes you can add balance comnectors in same way. Make sure the Charger handles it

[@93jdmmike]

DIY Tech & Repairs I have a icharger

[@brucetaylor7095]

Nice video mate, very clear and a great tutorial. Well done!

[@milvolts1]

Thanks for video, is it possible to use a 5s wires on a 4s pack or a 4s on 3s pack. And are the leads after the first negative you connected, positive or negative? Because you placed them between the batteries and the last one you placed was on the positive of the battery. Looking forward to your reply. As always your videos or top notch

[@nikolaosberatlis3942]

Why does one need balance leads? Can't one charge the battery pack with 12.6V?

[@DIYTechRepairs]

Yes you can but lithium are dangerous IF One intrnal pack in a series gets overcharged or overdischarged. Therefore you need to Keep track or each cell in a pack. And to maintain the pack a bms with balancer is needed. Lead acid you dont have it because you balance by overcharging instead. Lithium would let the Magic smoke out :)

[@lm0315]

Would this be the same way to balance charge cells in Parallel?

[@DIYTechRepairs]

No this is when you want to balance a pack already assembled. for instance a 3s pack.

[@Bigginger61]

Excellent bit of instruction Thank you

[@nitraaten]

does the capacity checker balance or does it only show they voltages?

[@DIYTechRepairs]

Huub this one os only a meter and nothing else. but there are units out there that do balance

[@startcherif]

very nice video

[@oscarzeledon3962]

How would I wire it if I wanted to do 2 batteries in parallel?

[@DIYTechRepairs]

Just add Them in parallel

[@andrewgardner7104]

Thanks great video your explanation even I could understand.

[@Isaacthompson]

Cool thanks!

[@srirammech100]

Hi I am working on electric motorcycle project. I have planned for 10 - 12KW battery pack. Expected voltage 72 and 90. Can you provide some options for this pack? Max weight expected 50kg. Thank You

[@DIYTechRepairs]

10Kw and 50kg is just barely depending on cells. If you go with 3.4Ah cells you would be able to get there. A 3.4Ah cell would be roughly 3.4*3.7 = 12.5Wh. 10 000/12.5 = 800 cells. Lets say the weight is 50g/cell . That give you a weight of 40kg. Then you need to add some extra for that and you end up with easily 45kg or more. But on a bike with some power you might need high current cells and those generally is a bit lower capacity. Lets say you take 20A current cells with 2600mAh per cell. Thats 1000 cells and 50kg :) Then for 72V system either go with 18s or 19s depending on what the components can take. Same goes with 90. Need to check max and min voltage of all parts. Last: Buy some cells and build :)

[@srirammech100]

Can we use polymer pouch battery? But weight is been increased when using those pouch.

[@DIYTechRepairs]

Yes you can use pouch. But you need to be a bit more gentle and build a better case for it. Pouch is more fragile and will easily catch fire due to no outer protection at all. But on the other hand many of the pouch types do deliver alot more current. Search for "Lipo fire" and you will see what or how a lipo can catch fire.

[@srirammech100]

Can we use LiFePo4 cells lithium iron. It is safe?

[@DIYTechRepairs]

SRIRAM RAM lifepo4 is generally more safe than both liion 18650 and lipo. so it depends if u need that oe high current :)

[@rogergravel6638]

Awsome tutorial 5 stars rating

[@noleftturnunstoned]

What happens when you add parallel groups?

[@DIYTechRepairs]

,you get more cpacity

[@noleftturnunstoned]

@@DIYTechRepairs I meant, how do you balance the cells in the parallel groups. Sorry for not being clear.

[@DIYTechRepairs]

@@noleftturnunstoned either balance leads between Them or 2 BMS systems

[@noleftturnunstoned]

@@DIYTechRepairs Hmm, that seems confusing. I think there us something that I just don't understand. I guess I have to do more research.

[@DIYTechRepairs]

@@noleftturnunstoned when you parallel 2 cell you basically add Up those capacity and it becomes One cell. More info on the forum. Link in description

[@jheckmann]

It looks like here, the white wire is to the left, but in the image on your website, the white wire is to the right.

[@bennyboney]

Thanx alot for this video,it helped me alot

[@crazycarl9484]

Just what I needed thanks

[@freetrailer4poor]

I just though of an simple invention I have not seen. What if you had a device that limits battery voltage to 4.00V if it ever gets higher than that it dumps to a resistor. Thus if you hook 3 of these devices to each battery above, the cell voltage could never get above 4V. Thus you don't need BMS as the battery can never get above 4V. Each one might only cost less than $3. Then you could reuse the device if you decide to go from 12V to 24V to 28V to 48V. It would make wiring simple too. Safety would increase too since a buzzer could go off if the voltage got too high in a cell. This video gave me the idea. Eltrdacus is smart he has the bms built into the charge controller.

[@DIYTechRepairs]

pirucreek thats a bms u talk about. all passive or bms system in sense of dissipating the excess energy do above. its the most common approach and exist in many bms systems :) though they will only do 1a or so continous. my solar system can chatge 300a :) also note that above tester i used do exist with balance function and they use resistors for that. but good idea.

[@grimr27]

thank you very easy to follow..

[@tygy9986]

very good!!!

[@amberleycosmo]

Great video mate!

[@MrRenoman2011]

Thanks awesome video and info

[@leeoliver2969]

Nice and clear, thank you.

[@chrisprocter7626]

good video thanks for posting

[@Markle2k]

I've read people saying that the balance leads should be equal in length. But with the standard resistance of 22AWG wire being in the range of 85 milliOhms per meter and manufacturing tolerances in wire being a few percent, isn't this nonsense on a battery at the physical dimensions of a hobby pack? Can I just trim (or extend) the wires so that they form a tidy bundle?

[@DIYTechRepairs]

Markle2k depends on charger. rc batts have different lenghts.... i do them in different too and that have worked fine with my icharger so far. ie they have kept the correct voltage after.

[@LaurenceAllen]

Thank you for doing this

[@davecasey1582]

Awsom video

[@robviolin1]

good video - thanks.

[@carpetcrawlerunited]

using a soldering iron on litium cells is a dangerous way to connect them together. hey aren't tolerant to heat compared to ni mh or ni cd. the wiring instructions for the balance leads was most helpful

[@davidfarmer2049]

you didnt show how you put an 8 arrangement into 6 slots......

[@copterofflorida4932]

Good job .

[@pneumaticfx9897]

Thanks for this

[@dejanzdravkovic9010]

Schönes Video 👍

[@MrJefferson105]

Thank you spot on

[@MCsCreations]

Really, really nice. :)

[@flyjim99]

Those balance monitor gadgets are not that accurate. Comparing the reading from 2 of them to a good multimeter shows the inaccuracy.

[@johnclarke6647]

4:26

[@ahmedalteeb]

Nice

[@hadablockers]

What the fuck did you say @ 6:51????