DIY 48V 20Ah lithium battery without a spot welder using Maker Batteries

If you want to get one of these kits, visit www.DIYbatteries.com where there are currently both 36V 20Ah and 48V 20Ah kits available.
Music courtesy of BenSounds

[@EbikeSchool]

I hope you guys enjoyed this video. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX

[@candisbrendel7396]

EbikeSchool.com who showed you how to cross your 7's like that? my german teacher showed us in class, did you go there or see it somewhere else? I have one leg, I am in a wheel chair. did you do a wheelchair video? we mean, how to make a regular wheelchair electric? if not could you? that way we could copy it, I was a machinist until the leg came off. Col videos so far!!

[@airlmaz]

hi man! you have 6 pieces in a parallel.!! а это 17100 mah

[@EbikeSchool]

They are 3400 mAh each, so its 20,400 mAh total

[@KingCrabGaming1]

EbikeSchool.com hey, the motor I want to use pulls 20.83 amps, would this 20 amp be enough since the difference is so small?

[@EbikeSchool]

Amps and Amp hours (A vs Ah) are two different things. The first is more equivalent to power and the second is more equivalent to range. This battery can output 30A, so yes it would be enough.

[@TerpDaveW]

GREAT video. Excellent technique and final result. Thanks for providing a source of materials for avid DIY people like me!

[@gymkhanadog]

Clever way to respond to what is I'm sure a huge influx of people screaming at you "DON'T SOLDER ON 18650 TERMINALS!" Keeping the heat spread should help. I'll add my own 2 pence and say you should (probably) alternate soldering joints until you're done. Solder one end of the pack, and then the other end, then back. People who work on body panels for cars do this to avoid warpage of panels and to keep from blowing through the metal. Tack weld one area, move no less than 4 inches, tack, move, tack move. What you end up with is a panel that is warm, but not burning hot in any one area. I can see the same principal applied to these packs.

[@saikrishna-mh9hi]

Thats a cool looking pack. I think you are very good at spot welding. Your videos are pretty informative

[@sr8shoota]

I'm sorry maybe I missed something. These packs look spot welded. Do you get the cell packs pre spot welded there for the title?

[@guytrimble8171]

He sells the rows of cells already spot welded.

[@gyurterd8922]

for PEOPLE LIKE YOU, WE CAN EXPECT A BETTER WORLD. THANK YOU MICAH!!!

[@grumpy19631]

Ok that was very cool!!! Fine job. I have to get your books

[@Afmu]

Hi Micah, what kind of tin do you use to weld the nickel tape? 60Sn/40Pb? What combo is the best for this job? Good and clean work you made! Congrats and greetings from Spain.

[@user-tp7uq1cn4v]

Great videos and impeccable quality result!

[@facelessvaper]

Amazing - nice to see you up and selling your kit - I got really excited and headed straight over to the website, shame, I live in the UK, its a good job I don't need a battery just yet however I foresee the need in the future as I think my hub motor will out last my battery and at around 600 USD for a quality made one (or so they say) I am looking at other options! Keep up the good work

[@bigdaddyyo2084]

what voltage rating on bms you use for this? and can you used it into 1000w motor?

[@jasonhughes6417]

Hey, a question... these kits (and others) don’t accommodate any fuses between cells. Other videos on here have quite complex bus bar / fuse configurations (often soldered directly to the cell cap). Are such inter-cell fuses important / advisable / unnecessary / definitely overkill..?

[@frankcrawford416]

Dude! I'LL just let you build the batteries. I am not tech savvy I guess. Great presentation. Thank you.

[@edgargarcia5956]

Great video, thanks. Do you know if they can make them in a 1s4p configuration. I am trying to make a flat pack that is a 10s4p pack.

[@racielperez5199]

Hi ebikeSchool where can i find a smart charger for high voltage li-ion batterys for example 72 volts thanks in advance

[@andrewzanas9387]

Nice job. Watched a few battery vids by others and cringed when giant threatening globs of solder were melted and slapped on top where they appeared they could easily short out individual cells, and wires were moved about before the solder had had a chance to set up. I like the nickel ribbon application using a spot welder to make small battery packs and use the ribbon to disburse heat and isolate the solder from the battery. Makes for an efficient assembly of larger configurations later. Also a big plus, a neat professional looking final package. We can live with soldering whole strips of pre-welded batteries. With solder alone I'm guessing there's an increased risk of creating cold solder joints. Cold solder joints mean a mechanical joint formed but electrically it could very well be anything from a high resistance connection to an open circuit or, as you pointed out, resultant heat damage.Was the finished product charged and tested for load balancing before you shrinkwrapped it? Do you not recommend shipping pre-charged batteries? What charger and display do you recommend using or including with a package sale? What brands and configurations in battery chemistry have you tried? Right now LG and Panasonic seem to be the top brand favorites for all standards of measurement. Sorry about all the questions. There's a lot to the learning curve and it's going to be big business down the road. Your video was extremely helpful. Thanks for this. I will def check out your other videos.

[@thierryhimself2796]

Many thanks for your videos and websites. Amazing resources that I'm still running through since I discovered them a few days ago. As for this particular video and the soldering process in general, I understand that preventing the cells from heating up is the key factor of the success in the entire process. I was wondering if it would help to cool down the soldering right after it's done, by applying a frozen or cold non-conducting object on it, so that the cold kind of balance the higher temperature brought by the soldering. Maybe not for this particular case, but more generally speaking when it comes to apply soldering that does not come from a spot welder on battery cells. Any thoughts? Salut et merci from France!

[@Beamthere]

Do you have instructions/video for making a 36V 20Ah battery? What would be different in the configuration?

[@Lordbaccus]

Dude you Glossed over so many IMPORTANT details!

[@BrunoPOWEEER]

Hey Micah, really cool DIY battery kit... super easy and very quick to put together!!! Perfect for people who are just making one of few packs and don't want to spend all that money buying a spot welder!! AWESOME work... I just bought your book from Amazon as well. I got the printed version =] So much POWEEEEEEEEEEERRRR... haha

[@mikethomas6051]

Morrre power bruno!!

[@GoldenSim27]

got one and want to say a big Thanks! for making these kits available with great instructions . I am not afraid to try and build it my self, but since i am a complete newbie , this kit with pre-spotwelded good quality cells with everything included to make it ,including video instructions was Perfect! saved me a bunch of money, time and able me to make one in the shape i desired , keep it up man!

[@jeffjefry2873]

Hi...I have 48 volt 8.7 amp and got problem the bms not working ...I looking bms for that ..my ebike diamondback overdrive exo..I need you help...thanks

[@mopuccino6025]

Just great video tutorial..and good alternative if you don t own a spot welder..anyway this says it all about the whole process wether you start from scratch or the pre soldered battery packs...why not ending the video with the charging process ?just to make it complete for noobs..thanks a lot guys ,this helped!

[@RyansMarket]

One question. How do you locate and replace a bad battery if it goes rogue or reverses polarity or something? I’m not sure the what the chances are of that occurring, but isn’t it beneficial to be able to service the batteries? That’s one major advantage I see in your modular cell building kits.

[@michaelkreitz]

What is wrong with all the people posting hateful comments? Micah is trying to help the DIY community and this is how you react? Shame on you...

[@gymkhanadog]

It's the internet. More specifically, it's the KZbin comment section. View it like a cesspool. It's mostly shit.

[@fidelvc]

Can you make a tutorial for 48v 20ah battery pack triangular shape?

[@samuelspacey710]

Shame? Shame is when your bike bursts into flames taking your house with it because of a short.... facts do not give a damn about feelings when it comes to house fires

[@cutty02]

yup unhappy losers like @Samuel Spacey are what make places like youtube a cesspool. Pessimistic losers

[@Freekniggers]

fidelvc perhaps you should make a comment not a reply to a comment for you questions that are legitimate.js trying to help

[@shanmugasundaramp7904]

Can we connect bms to adrino board to monitor battery charging, discharging and battery capacity

[@royfitzsimmons6226]

Hi What BMS did you use for this 48 v 20 ah battery ?

[@goldengear6125]

If I had a amp controller rated for max 84volts and 41 volt cut off would I be able to use 2 36volt battery packs together ?

[@dhupkathi]

How do I connect a 1 KW BMS? Please so a good way to build a 1 KWH battery with 1 amp current drawn from each cell

[@hermannnicholsson132]

Hi bro.. thank you so much for uploading this video... I will be building my 18650 battery pack soon... god bless!

[@ginnynewman317]

Micah, this is great! Thank you!!

[@pheimbach]

How do you measure (check) a single cell in a parallel conection of 6 cells ?

[@damianvesik5573]

Would you recommend using the vruzend battery kit to make a 48v 20ah battery for an ebike? I don't have the equipment to do the soldering and stuff.

[@BTRflorida]

what about charging? do all the batteries charge the same amount? I thought you had to have some kind of electronic board so they all get charged the same? thanks

[@brucesweatmaniii6030]

you guys welded the first strips? Why not weld these strips too? Save time and make sure you have a better connection.

[@artfree-spirit7214]

Micah, is it safe to hot glue cells together like that? Should I get cell holders instead if I'm concerned about safety?

[@estevendejesus7400]

I was hoping you could help me out, I was trying to make a battery pack but I am having trouble finding a seller on ebay that wasn't trying to rip me off. can you post a link to where I can find these specific batteries in your video?

[@nobrokenheartsforme]

Sorry if my question seems very stupid but I dont really know much about batteries. So how would you charge this pack? Most packs come in cases and have a plug in charging port.

[@sreekumarUSA]

Lithium Chemical batteries are a complex cell structure that needs to be charged in a controlled manner. Lithium (Li) is very unstable chemical and therefore, needs to be charged through a charging device is called BMS ( Battery Management System) Please get further advanced info online. YOU MUST NOT CHAREGE THESE BATTERIES BY THE NORMAL METHOD. Please note that if mishandled, the Li-Ion battery can EXPLODE and cause extensive damage to property and personal around it.

[@simonebuono_aw]

Hi, nice video, I would like to make a similar battery for a 1500w hub motor but with 52v voltage (14s). Which battery configuration do you recommend for this motor and above all if I use these cells of the Panasonic NCR18650B how many cells do you advise me to insert in parallel to have good performance and reduced stress per single cell?

[@AY-me6sk]

Hi, where did you bought a Uxcell PVC Heat Shrink Wrap for 18650 Battery Blue and what sizes did you used for battery pack 48v 25 AH ???

[@siqthepunk]

hello sir, if I'm going to make an external battery that will be installed parallel to the internal battery, should I equate the internal battery MaH with my external battery MaH.

[@terrydubay9113]

Let start off saying I love your videos! Very informative, Clear and to the point, One of the best video editing and quality. Now you had mentioned you build battery packs for customers. What is your business web site?

[@Tony0THUNDERCAT0Reynolds]

Did the strips come ready welded, as the video says "without a spot welder"

[@EbikeSchool]

Yes

[@takismail]

this guy is a hack.

[@johnconrad5487]

so why lie in the title? also generally 18650 batteries are about 2.5 A-H and u have 6 in parallel so that makes it about 15 A-H and you called it 20 A-H.. for 20 A-H they all have to be 3.3 A-H. so now is that also a lie? you have 13 batteries in series so that makes it 48V which is what you called it. is the DIY your sales outlet?

[@EbikeSchool]

+John Conrad - Relax, they are Panasonic 18650B cells and so they are 3.4 AH each, meaning the total pack capacity is 20.4 AH. The title isn't a lie - you don't need a spot welder to build this battery pack.

[@romanf5666]

@conrad: I guess you have other problems, call a doctor

[@ronhammant7309]

Easy to see why readymades are expensive, wish I had the enthusiasm to do this.

[@carlospoor8014]

When this kit will be available again today is 9/26/2019

[@gasolinadeaviao3789]

how can i upgrade this to a 60v 20ah battery can u explain please? :)

[@murdelabop]

What are the assembled dimensions of your 36v kit?

[@shavkat84]

Hey Mike i just received my batteries , I checked voltage all batteries from 3.45v to 3.50, my question is should I fully charge them or i can start putting it together?

[@normanbuchholtz697]

Hey Mikah. This might be a dumb question but what happens if one cell is bad or has less voltage? How does this affect the total pack?

[@alireza071]

I want to solder the 0.2mm copper strips on top of the nickel strip what soldering iron will be best to do the job pls

[@uptono8475]

Có tất cả 78 viên pin, loại 3,7 vôn. Ghép song song có 6 nhánh. Mỗi nhánh có 13 viên mắc nối tiếp (13×3,7v = 48,1v). Vì mắc song song nên số vôn của nguồn ra là 48,1 vôn. Thêm 2 Diod chống ngược cộc với một tụ bù, 1 Transitor ổn áp 48v và 1 ngỏ để sạt pin. Xin cản ơn Ad !

[@Redblower]

Thanks for convincing me to get a spot welder.....

[@anthonyfortier8765]

LOLOL best comment

[@txsraappraiser]

A power wall user was utilizing several 4.2 volt packs and combine those.

[@rlwings]

Great video, thanks! ... But I'm confused about something. Why so many strips? Wouldn't one strip connect 2 rows because everything is already touching each other?

[@Stiffler1109]

Disclaimer: I'm just guessing...know very little about the world of DIY battery making. That said, I wondered the same. My guess is that the thin strips of nickel might overheat if there were only a couple. Maybe dispersing the energy evenly and with greater surface area might just be better craftsmanship of that kooky DIY'd battery, dramatically reducing the risk of a strip overheating and melting. And I've only watched the vid once, but if there was only one or two connection points and one breaks, the remaining single connection might then have all the current running through it, causing it to melt in short order, resulting in catastrophic failure of the whole batt. I'm undecided as of the moment whether I'll DIY it or buy a premade. But one thing I'm not undecided on is my confidence that a battery failure as the result of going for a good *long* ride on my 48V 1,600W Uberscoot would likely produce a situation whereby there's precisely ZERO scootage yielded after the battery is toast, manifesting the consequence of walking the 80-lb Uberlug a considerable distance back home. I believe they weigh 117 lbs with the lead acid batteries. I'm guessing (again) that a lithium batt weighs 40-50% of the guesstimated OEM 50-lb battery bag. Conversely, I like the idea of a battery whose energy flow between cells is widely distributed, keeping cool and thus keeping its lifespan and health as a rechargeable battery nice and high and long.

[@wisashelanobamoll8633]

Good evening, very nice and instructive video, thanks. , I have a question, can i use a 16s bms on a 15 row battery and just leave one connection blank, or is that not going to work out?

[@MekazaBitrusty]

I was just wondering about your earlier comment. You said measure all the packs to check they have the same voltage. What do you do if they don't?

[@EbikeSchool]

If they come from Maker Battery, then they should all be the same. But if you have cells that aren't the same voltage, you shouldn't use them in parallel. Either charge/discharge them until they match the others, or find other cells. Putting two cells in parallel that have drastically different voltages can be dangerous, as the higher voltage cell will try to rapidly charge the lower voltage cell.

[@grandpaobvious]

This is the most important question in the entire thread.

[@czarzenana5125]

Before soldering or spotwelding any packs or cells it is always good to use a load to equal the voltage of the cells or packs of cells.

[@9001greg]

@@EbikeSchool Actually same voltage doesn't matter, unless they're "fully charged" what matters is the internal resistance which can also be tested. You can have a half dead battery and a fully charged battery that are the same voltage (3.7). That would mean your "fully charged" battery is garbage and your "half dead" battery is not fully charged which would be around 4.18 - 4.20 volts in a healthy battery. Comparing voltages after fully charged and sat for a few hours, you should see them around 4.17 volts. both batteries being around this means they're probably decently healthy. Though it still is irrelevant to whether they should be used in parallel or not. That's what internal resistance is for and why it's important

[@RussellD11]

How do you legally ship your batteries you build.... I still cant figure it out lol. a 20AH kit would be 1KW and way over all the shippers maximums :/

[@billybbob18]

I would use Kester rework flux on the solder points and use lead based solder for a faster melt at lower temps and a better joint. This is DIY so you're not selling lead free products to consumers. This is the same method used by the military and NASA which should speak to the quality results. After using Kester products for over 5 years, I can now understand why military engineers rave about it.

[@grantgre]

So on your website two batteries cost $10 how many do you need for this project? It looks like you need 12 or more batteries 12*6 72 *10 =700$ ??????

[@qusaytime]

I have an electric bicycle with a 250 watt 36 volt motor with a 36 volt and 10 amp battery. Can I switch the battery to 36 volts and 15 amps ..?

[@bigcatsliontiger]

can someone who know about batteries tell me if its ok to build 13s 4p that normally needs 52 batteries with just 45 batteries . That mean the last set only will have 6 batteries connectes in series with each other and in parallel with other 3 sets of 13s ????

[@heavystatus6783]

I want 48v 120ah how I make it from where I get the whole kit What type of charger I used

[@Mizziera992]

How to make 48v 30ah or 60v 33ah? How many LifePO4 32650 batteries will I use? And what BMS capacity for 48v 30ah and for 60v 33ah? Thank you for your support.

[@prof8957]

Great video tutorial! Have you built one using LiFePo4/32650 batteries for 48v/20Ah?

[@LEARNER4LIFE1]

is there a way to build 48v battery under 10ah? i cant find any videos or tutorials

[@luisgamito8376]

you have video of a step by step construction of a 20s14p battery with bms assembly?

[@stevenadams4429]

the Milwaukee M18v red 12.0ah used on Milwaukee power tools? As I’ve came across 5 of these bnib & im keen to know if there suitable for Ebike battery build. Being Milwaukee (a decent) brand name I’m assuming the cells should be decent cells? There 21700 cells high discharge, are these suitable for a decent battery build?

[@occhimoore]

Do you sell the battery pack already assemble, or just the kit? I don’t have the tools to put it together, and even if i buy them it would be for a one time use.

[@deswr1]

Is it ok to Spot weld the BMS power cables to the batteries while their already connected to the BMS itself, would it damage the circuitry?

[@marentesvic65]

Hi,you have tutorial book? I will buy it,send me information,thank you

[@zachdortch143]

is there somehwere i can buy just that black padding material you used?

[@jebsagustin6745]

hello Sir.. can i still use the charger that came with my ebike.? Thank you so much

[@jango3157]

Sla ba yung bat mo paps?

[@eddyboh2723]

I bought a 48V/99999mAh pack but it got wet and a few weeks after it dried off, it wouldn't charge any more. But it had 3.67 volts left after testing it with the multimeter. Can this battery pack be fixed?

[@MrMostafamarhamo]

keep it up bros and thx you for your channel and videos

[@dodits1665]

Can it be possible to parallel 2 pack with same voltage with different amp? Say for example 10 2.1 amp 18650 in series parallel with 10 2.5 amp 18650 in series? Thanks 🙏

[@rijaltanjung9506]

Which battery can I use ? 15A, 20A, 30A of 18650 type battery ?

[@Thechist781]

I’m thinking about building one. My only concern is about how safe doing this would be. I don’t want the thing exploding between my legs or burning my house to the ground while in the power outlet recharging.

[@guydrukman4344]

Can i make it the same way just with 5 batteries each cell instead 6?

[@pepitocabalu7972]

Can we build a 48volt triangular shape

[@Vmaxfodder]

I want to make a 28s 9p or 11p battery . any advice for this ? any problems you can think of? thanks

[@azimzain1211]

Another great video Micah..what BMS did you use in this project?

[@davey2k12]

very informative u need a good soldering​ iron tho mine was crap lol so I made one with transformer ayit

[@gideonlapidus8996]

Good one Micah, what about using copper strip pieces with the correct current rating?

[@georgegaw7809]

The 6 pack module looks like prewelded, positives welded together and negatives together. So each cell voltage must exactly or precisely the same, otherwise the cells with higher voltage will charge the lower ones. Please correct me if I'm wrong. Thank you.

[@mikakorhonen5715]

Does it matter if using only new high quality cells? I understand if using getting cells from random laptop batterys...

[@christopherbetty5017]

Mike, I have 3 52v battery pack that is assembled but not sealed. How can I make it into 2 72v battery without disassembling them?

[@a.i.5673]

how did you get 20 ah out of 24 x 18650 cells ?

[@TheResoluteMind]

alex iva I think there were 78 cells right?

[@danthor0219]

hello you could make a video of how to create a 72V 20 AH battery thanks

[@darksenseful]

Sorry about my english but i dont understand well. I want to know if i want to do 48v 20 ah battery how much battery i must get? and how calculate is this.

[@HowlingWolfLeather]

So how many of these would it take to power something like a super Soco?

[@romandise]

and then how did you recharge this battery?😕

[@nikolaytube]

where do get heat shrink tube that large?

[@urbanaudiophile482]

is it ok or safe to make 48v 60ah battery pack for my fiido m21?

[@Roedlundd]

so what is the total Wh of this whole thing? I dont get it, 48V x 20Ah? thats not much for an ebike running something like a 5k Watt motor?

[@anandsingh8987]

Please help to understand the comparision between Li-po and Li-ion for e-bikes and if we can use it for e-bikes.

[@otablott7779]

Lipo and lion are same battery but lion are also called 18650 calls which are much more stable and safer. Lipos are very volatile and are a serious fire/explosion hazard

[@surejaselimi8912]

hi mate... im disable person and im using handcycle wheelchair... the battery is bottle... 36v 15ah... what battery is inside? and can i use 48v 20h ... in 400w motor?

[@ramihamouda6719]

I have a motor that is 48v 1000w and 65 battery avg is 2800 so how long would i expect on range can u please show the calculations

[@maxkodiak9591]

I thank you for the tutorial pity that I don't speak English but your demonstration allows me to understand the main line of the assembly but I will have to contact a technician because I don't understand the position of the connections b- c- p- which load that provides in any case thank you

[@DavidLorellHoskins]

Great instructional. Thanks

[@michaele1278]

I used to ebike to work, but that was with a sharkpack. I could just unlock it and take it with me. If I make a big pack of my own, or a triangle pack. Is there a way to quickly take it with me. I want to minimize opportunity for theft. Thanks.

[@aubinsutanto2154]

Hi Friends, I Just DIY 48V 20Ah , 2 pack , and I confuse about How I Can Paralel that Battery so I can get more Power to Be 40Ah , cause I BMS there are two port , One for Charging , and another is for Discharging. I do with Recondition Battery not a new one is need a special treatment ? Thank You