I purchased about 10 packs. Here's some caveats not mentioned. They are stuck together so be prepared to rewrap them with new sleeves. Some appear as though they've been dropped. This was only apparent during rewrap period. Had about 10 rejected cells after capacity testing. Overall batteries do test to rated capacity. However most only reach 4.15v. Fair deal, just a lot of mining.
I bot 50 packs for a powerwall. I'm having to re-sleeve half of them. I also get 2650 to 2750 and the date stamps are 2016 and 2017. Jehu is over-selling these. Add the dents and voltage limits and 3-week shipping. I may send them back.
How do you know the amount of amps it needs to charge? This is confusing the heck out of me. So you have 13s7p how do you add the amps required to charge per hour? Lets say 2600 in ah is 2.6ah x 6p=15.6ah 18.2ah x 13s=202.8 Amps. Am i way off because i cant find a straight answer in forums. Thanks
you would charge the battery based off the 6p max charge rate for each cell witch is about 1.3 amp per cell so 6 amps would be max rate i would charge them at. The way he has it configured is 6cells parallel and 13 in series you always calculate total amp hours/ watt hours based off the parallel configuration the series configuration is to just increase the total voltage of the battery. Just for reference each of those cells can handle 5 amps each continuous discharge and 1.3amps charge rate
Have access to a whole bunch of 20400 batteries for free. Is it worth or possible to try to make a battery pack for an ebike? Sorry don't know much about this.
It is some sort of white residue that I can't identify. If I rub real hard, some comes off. Also, the pink wrap comes off it you take these cells apart. Jehu doesn't want to show us that.!
Just out of interest (i dont know so asking) does the BMS have the capability to get hot like a battery pack does if so (again I don't know) would it be better to have wrapped after all the batteries have been wrapped in the yellow non shorting non fire wrap stuff and then attached. Not a criticism or telling as honestly I have about 2.5% of the knowledge you do in your brain in relation to battery systems, controllers and BMS. Please say if i'm out of whack and why if their is an obvious reason. Love the work you do for spreading the knowledge worldwide (youtube) about how easy it is to change our presumed habits for transport. Thumbs up on the vid, know how much this piece means on the youtube algorithms.
most bms don't get hot enough to melt anything because they are limited to a certain current load and are almost all thermal limited. only time iv seen bms get above 50C was when i was balancing the cells on a battery that were way out of sync
I can see that you have connected only two points (+ and -) for every pack while other's are connecting almost every single battery in a pack to a different pack's batteries (if it make sense), is there a reason for that? I guess connecting every single battery would make the whole pack not redundant if a single battery on the each end would fail? Can someone explain me this?
Hello . My name is amjad. I have an ebike that needs a lithium battery that is 48 volt 14.5ah. So if possible that you can make a video on how to make the 48 volt 14.5ah lithium battery? Best regards and thank you.
Hi! which component allow/controller you to charge a 48v battery at higher amps? Most battery seems to have 5amps limit but I need to charge at 7amp max using two solar panels with Genasun solar controller. thanks!
@@daviddelatorreperez4 Tu mismo lo puedes actualizar, David. Ve hacia arriba en la pantalla principal. En la derecha encontraras tres puntos. Presionalo y busca los "captions" ahi. No se si el tiene que actualizar algo. Creo que esa opcion ocurre automaticamente si el usuario lo pide. Saludos.
NO WONDER ONLY 109 comments, Guy apparently doesn’t like to answer questions from people who take time to view his channel n in turn is making him rich! Basically screw ur comment is how I see it n I’m unsubscribing 👍🏼
i am sad because everything come from china but somewhat somewhere in the middle everything go through USA and this 100$ battery will cost me 500. Maybe what I need is a canadian Jehu
i wouldve added more nickel strips per series connection, youll most likely be able to only pull 10 amps out of that before the series strips begin to heat up
Not only are the nickle strips too small, the parallel cell groups are touching each other and if it were not for the thin shrink sleeves the battery would short between parallel cell groups. That's fine if the battery is stationary but it's not safe to use on a E-Bike that moves and vibrates down the road.
@@barryrudolph9542 Yes, additional fish paper between cell groups is a must for this application, better still to use real spacers (only a few $ more).
8mm x 15mm nickel strip will only carry like 8 to 10 amps continuously. You have two of them per p-group, but your p groups are good for about 30 amps so he's a bit light on conductors.
Why dont you do another post and tell us how long that pack lasted. It was a nice build but... Model: ICR18650-26F Size: 18650 Style: Flat Top Nominal Capacity: 2600mAh Continuous Discharge Rating: 5.2A Nominal Voltage: 3.6v 6 in parallel = 6 x 5.2A = 31.2A your feeding in series 13 times. ~3.6v X 13 = 46.8V Nominal Those 2 5mm or 6mm you have linking the parallel packs in series come in cheap nickle plated steel and pure nickle and I have no idea the thickness so I just pick middle of the chart and say .15mm which can only carry about 6 or 7 amps respectively at max each and if they are nickle plated you can drop another few amps off each and thats max which will run them hot and weaken over time. 6A x 2 = 12A or 7A x 2 = 14 amps either way you better not be running more than 350 or 500 watt motor max or you will burn right through that pack and even then it's debatable. Yes a lot of chinese manufactures make their battery pack the exact same way and that's why they had all those 2 wheel hover board fires
I was thinking the same thing. Not only will that pack overheat and destroy itself, it will likely take out the bike and rider also. This from the king of bus bars. WTF!
You pull 5amps from these and you are going to have a fire my friend. Rated when new at burst is 5amps wouldn't pull more than 3 amps from these used cells
Nice relatively easy and cheap solution, but those two nickel strips for the series connections between packs aren't going to handle much current. I'd add at least 4 more!
Any schematics for 48v I’m new at this but mechanically incline ( have wired things ) just not bike batteries! I’m looking to need for 1500w rear hub drive Thank you 👍🏼
How many amps can you get from that? Just curious, when I built my 14S, I got so much crap on the size of nickel strip and how many I used to create a series connection. Luckily I did some research before I built it. I have a 1500w bike(not complete yet). Most people that built them with 13S had issues here and there with the power after awhile. So I found out that a 14S battery was better as long as the controller could handle the amperage. Here is the video that helped me the most on my decision to make one-ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-alHocJk7DHg.html Of course, you can find my build on my youtube channel. I still owe all my skill to you Jehu you Rock......here is my build, I hope you like-(14S10P 34ah Triangle E Bike Battery Build)-ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ILeYqb9sZQY.html Here is my BMS part of it-(DIY BMS & Active Balancer - 14S10P 34ah Triangle E-Bike Battery )-ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qnQNzUR4aZw.html Kinda Crazy I learned most of my stuff from watching your videos......Hoping one day you feature me and help me get some subscribers....LOL 362K, I remember you at under 20K...You Rock!!!
Forgot to mention......I also made a cool charger-(DIY 90V 20A Adjustable E-Bike Battery Charger Pelican 1150 ( dps1200fb ))-ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ogmdTuobs8w.html
Would recommend a max out of 20amps or about 3.5 amps per cell, x 48v = just about 1000 watts of continued draw. Iiif you are brave. I had a 72v pack made from these and had a thermal runaway on a bank. Explosive cells if not used correctly.
Jehu - On Easter, I had an 18650 ignite in my pocket. I spent 30 days in the BICU (Burn Intensive Care Unit). I'm still healing after massive skin grafts. I'd love to share my little story along with some pix. Hit me up if you like. This stuff can be dangerous so a Jehu-Branded PSA couldn't hurt.
LOL, or not lol actually. I burnt a hole through my pointing finger a long time ago when I tried to charge a Li-ion battery. You know those short fat ones used on the early point and shoot cameras. It ended up venting and as I let go or the wires...which I was retardedly charging the battery with, the hydrogen lit up and like a very intense torch, it burned a hole right through. A large fire torch was passing right through my skin, bone flesh and nail. I spend a whole year with the ability to pass pencil led through my finger! Great for impressing kids in college. It's been a good 20 years now and I still have a little scar with some kind of dark metallic stuff stuck in there. I'm a happy and stable person, so I assume it's lithium..lol.
So Wrong. 25 amps input. way to high. Your array of little wires won't handel 25 amps evenly so you are wacking the first set of cells with way to much power.stupid........???????????...... Should be like 5 amps or better 3 amps and let time do it's thing.
I still can't understand why you take so much time to detail how to unwrap three layers of shrink wrap, but "here we go" your way past the specific details on how to build this supposed "simple" battery. Someone like me who has tried to follow you for years and fill in your activity prior to the "here we go" by piece-parting other videos as fill-in has to be as frustrated as me. I do want to thank you for your videos. I'm not trying to hate here. I know they take time and effort and are many times not appreciated. That is not the case here. I'm just saying, wouldn't it be better to make your videos count even more? Can't you sort videos out specifically for beginners with excruciating details so those of us who want to learn how to put these batteries together can participate? You are leaving hundreds of potential consumers on the table frustrated and clicking off your channel. Shouldn't a beginner type video be for a three year old? Again, I'm not trying to criticize your work. I really appreciate what you do. I just wish I could be part of the movement too. Thanks. :)
Sorry but, if you are getting lost on building this battery, you should not be playing with batteries. Nope I will not show you how to strip wire, or how to solder, or how to stick tape. This is not what this video is about. I can not start every video explaining what a battery is, and why we need them. Sorry
@@MySocialExperiments I think everyone has slightly different ways of doing things. The video would simply take too long. Bounce around to other diy builds and learn. You can piece it together like that, and learn nuances from different battery makers. I find it interesting
Don’t build your packs this way. Series connection on every cell , no excuse not to when built in rows like this. This is a very poor example for people trying to learn and seeing you do it they probably feel it’s ok. Maybe in very very low current applications it would be ok but a pack should always be built to the cells capabilities. If the cells can output 60 amps the design of buss bars should easily handle that.
With only one tiny series connection between the packs you definitely don't want to put that on a ebike. You normally know your shit, what's up with this one? Did I misunderstand how you connected the series connections ?
Missed one step - after charging is done youv needed to cut them all out and wait for one day do see the voltage in every one 18650 and throw away the ones who has lower voltage (minus 1 parallel). Now there is some "dirty sheeps" in pack/
Now the 6p packs are not in parallel anymore. It behaves like 13 individual cells and you can see in which 6p pack it is expected to be a bad cell. Then you can disassemble that 6p pack and find it :) Mostly all cells are pretty bad if such a 6p pack is bad. I would not have installed batteries that were below 2.5 V for a long time for high current applications. But he will see how the pack performs. Some old cells wih high resistance may get hot while charging. Difficult to terminate in such a big pack.
I only came here for what happens from 6:00 - 6:30 and you fast forward the whole part and offer no explanation. I think it would be more usefell to learn how to do that than watch you cut open batteries
Jehu, I was just looking for your email address to send you an email with some questions I am trying to get answers for regarding building a battery for my chopper motorbike. Or is there another way to contact you more directly? This video is really something I have been looking for, for the very project I want to do. I have some regenerative ideas I can't seem to get an answer for as well, I'm thinking you may be the man to get those answers from. Please message me with a more direct way of contacting you. Thank You, Keep Safe All, -Matt
What ist better? 7s10p, 7s20p? For a 24V Powerwall... And can i fix multiple Accupacks 7sxp (with single BMS) in parallel? Like 7s20p-4p? where can i get information for diy Solar Accu Packs, and normal Configurations? Ist it better to assamble 48V Packs, or 24V, 12V Packs... With 48V The Current should bei only 1/4 Like an 12V Pack
I've watched lots of video's on ebike battery pack.I got this battery from yeah ,Aliexpress it was suppose to have Samsung cells.Not,anyways its a 48v. The center row of cells from one end to the other is not spot welded.I checked them with my meter around 4v.Should I spot weld them?
I'm sure you meant no harm but there's someone who doesn't know what a BMS is or how many batteries in series how many batteries hooked in parallel and you didn't explain any of this you're going to get some hurt. Have you ever had two hundred amps blow up in your face. 100 almost killed me!
hi, I want to make a balance charger using tp4056 for 48v battery 12s 3p does that mean I need 12 tp4056 modules connected in series and then to the battery like BMS wiring?
Been looking something like this. I have 7 of these things and want to build a solar power back if anyone could point me in the right direction, much appreciated
Great batteries. Famous 26f cells. Look at batteryclearinghouse or batteryhookup for the 3 cell Pegatron.modem packs of you want the cells for even cheaper($0.55) per cell. These packs are nice because they come in 1s6p already connected, so they are less of a chore to process into a usable pack.
i wouldn't trust that battery to pull anymore then 15 amps the way he currently has it put together if he added few more series connections to each row it would be suitable for an ebike
I want to start similar project. Could you please suggest where can i get hold bulk collection of laptop batteries what would be a right price for a laptop battery based on number of cells it may contain i mean what would be right price per each cell , considering lot of work that is involved after that
I've been following you for a little while. I'm going to make this battery I just ordered the packs from your web site. Wish me luck. I'll have to look back on some of your past videos for more details on the bms and pack build.
Make two 7s packs to = the 48 volts, then make a removable series connector for the two packs, easier to charge on most common chargers, and ditch that BMS, use 2 dollar volt meters to monitor the battery. Just saying, Nice job, I've actually learned most I know from you, so thanks, Ron Stark.
DON'T RUN MORE THAN 10 amps!!!! usually one nickel bridge is safe for 5 amps (you can push it to 8-10 amps but you will generate a lot of heat. If you want to run 2800 watts of power (~60 amps) you need a total of 12 NICKEL STRIPS to have minimal voltage sag and heat.
Ty this answered a couple of the main questions I been struggling with. Gave me more things to think about but still couple steps close to the goal I'm working on.
