DIY Stealth Enduro Battery! Create a Powerful 72V 40AH Battery for Cheap!

[@scotja12]

I found this video in my search to build my own Ebike from start to finish. I saw that Myles and his team not only built these batteries for sale, but were also located in Canada. I have spoken with Myles via Email and Phone. Myles is an extremely helpful resource to all things E-vehichle. I have now sourced the majority of my Stealth Bomber parts through Myles. Give this man some time and he will provide you a masterpeice.

[@ElectricBikeLaboratory]

Wow those are some kind words, highly appreciated! Great to deal with you as well Jason ! 😊

[@IdahoEagle77]

One of the reasons I haven’t built any sort of electric bikes yet is because 72V batteries are so stinking expensive. Are these battery builds pretty safe to use with an e-bike? Man, this is awesome. Subscribed. Would love to see more battery builds like this on-the-cheap.

[@shadoclothing2376]

This is an awesome and somewhat informative video for anyone wanting to start up a company as a battery supplier, manufacturer, wholesaler, But for anyone not interested in starting up a battery manufacturing company and is just interested in making a battery for their own personal use, ebike (etc).... The cost of supplies and tools could never possibly negate the cost of just doing the proper research needed to buy from a reputable supplier in china.

[@RobertPetrucha]

Sure it can. I made a 72v 12.8ah pack by tearing down two of these packs to the cells and building it in a dp-9 case. From aliexpress I got side cutters, 5m battery cable, JQ-DHJ02B spot welding PCB, 10 pack of xt60 connectors, 100pcs pure nickel strip, and a 33M roll of kapton tape. All for about $85 shipped, hooked the spot welder up the battery from my truck. The spot welder works great for $30 but you need to keep your battery charged up or quality of the welds starts to drop. For my pack I had to do something like 300 welds. I kept a battery maintainer and a jump starter hooked up to it. Or you could run a couple car batteries in parallel. Now labour and safety... This was a completely new skill for me so it took me days of research and labour to pull it off and I was worried the entire time about burning my house down if I made a mistake. If I did it again I'd probably set up to work outside in a spot that I could just let it burn if something went wrong. If you don't know what you're doing and you value your time and safety this is not worth it, but it's cool to ride around on a pack I made. I've got my controller limited to 2kw but my pack can do 3kw easily and I've given it a few bursts of 4kw with no problems. The packs, case, and bms were $380 shipped so in total I spent $465. Over a third of my cost was in the case and BMS so if you're building a larger, caseless battery like a stealth bomber and get a better deal on a BMS you'd be saving even more.

[@yamenkilane3473]

Hello, can I add more packages, meaning it becomes 8 packages instead of 6 packages, and it becomes 51 amps, and I enlarge the BMS to 80 amps? Please reply quickly, my friend. Thank you.

[@ElectricBikeLaboratory]

Yes you absolutely can!

[@mitchlehmann9292]

Where was the series connection made?

[@PaulPaid]

What is the nominal and max amp output of the finished battery?

[@twoguyspies2056]

Is there a more in depth video on this battery? I would like to build one, but need a little more information.

[@-Gunnarsson-]

My first battery build was a 42v 40ah. Abit scary to handle 😂

[@CaptainCurt07]

*How are the cells connected, Where youd get the diagram configuration so I can copy, Im new to battery building so I didn’t quite understand 100%* Thanks

[@ElectricBikeLaboratory]

Hi there , they are all connected via nickel spot welding in this case. The packs are our ECO packs (36V) that are 3 stacked on top of each other and then each group is connected (group directly above /below connected). Hopefully this helps!

[@wtfvids3472]

@@ElectricBikeLaboratory ECO packs?

[@ElectricBikeLaboratory]

​@@wtfvids3472 Yes there are links in the description

[@wtfvids3472]

​@@ElectricBikeLaboratory i bought 300 cells to replace my own 72v 48ah battery's dead cells. can i just reuse the same bms?

[@yazmat96]

@@wtfvids3472if you ricreate the same diagram of the older one I don’t see why it would not work. I’m curious if we can create a bigger battery, whit the same voltage of the original but whit more amperes, and reuse the same bms.

[@freedommoser4542]

I understand you attached a 60a bms to the battery but if I were to build this same setup for a razor using a sotion fw01 motor and powerful controller would I be able to use a 250amp bms or would that be too much for the battery. Secondly what is the max charge for this battery before damage and what is the minimum voltage before needing a charge. Thank you!

[@ElectricBikeLaboratory]

This particular battery has 12 parallel groups rated at 10A each so 120 is really the max current you would want to draw. Max charge voltage is 84 volts and minimum is 60 volts

[@OnwardVision]

When you connected them in series you just used 3 12awg wires from + to - then - to + between the 2 packs?

[@ElectricBikeLaboratory]

Yes

[@retrograde330]

What happens if the batteries are of different voltage, what then?

[@ecocentrichomestead6783]

I understand how to build the batteries. My problem is I live in a remote place and can't find a trustworthy source of parts to mail/internet order from.

[@Wise22Man]

Great video… Do you know what the overall dimensions ended up being?

[@brucegreen4756]

I have a GT08 scooter. Is it anyway possible you could build me a battery that last longer?

[@Keepuptaspol123]

Do the parallel tabs not have to flow any current at all?

[@ElectricBikeLaboratory]

Correct, very low current flow from parallels. All current flow is in series connections

[@directandrew]

What model LG 18650 are typically inside the harvested packs?ICR, INR or IMR chemistries?

[@simasivanovas8853]

1 tiny strip connecting each rows of cells? what is that bike running 250w motor and 10-15A controller? these strips gonna glow red if running more than 20-30amps

[@ElectricBikeLaboratory]

What are you talking about ? The strips connecting the parallel cells ? You realized that parallel connections carry almost no current right ?

[@akinnon2000]

Very good series thanks ! :)

[@ElectricBikeLaboratory]

Thank you!!

[@Rhysy4-1YT]

would really like to see you do the same for e scooter

[@jobdlugosz179]

Do you guys sell these? I would love to buy one, possibly in a life Po4 version.

[@ElectricBikeLaboratory]

We sell them but they are only on Lithium Ion

[@jobdlugosz179]

@@ElectricBikeLaboratory That should work, how much usd for a 72v 30 ah pack?

[@thetrispyone7812]

how are the 2 pairs connected together?

[@ElectricBikeLaboratory]

3 x 12AWG Cables

[@bestestname6757]

What motor and controller did you pair this up with?

[@ElectricBikeLaboratory]

Hey there, we paired up with an MXUS 3K Turbo motor and KT 56-90v 60A Controller

[@aski1529]

so if i want to connect 2 batteries in parrallel i need to connect group1 to group1 and group2 to group2 etc🤔

[@ElectricBikeLaboratory]

If you want to connect 2 separate batteries in parallel, you can just connect them both with a Y Splitter. Make sure the batteries are same voltage. If you're building a large pack from smaller packs, and stacking them in parallel, then yes you need to connect all of the groups on them. Hope this helps!

[@aski1529]

@@ElectricBikeLaboratory yes i think 1big battery is better and maybe safer

[@ElectricBikeLaboratory]

Yes I agree ! Good luck let me know how it goes ! 😊👌

[@robintaylor3860]

Have you built any LTO battery packs?

[@ElectricBikeLaboratory]

I have not built any LTO, so far just Li Ion and Lifep04

[@robintaylor3860]

@@ElectricBikeLaboratory I have a couple of 48 volt 40 ah packs BMS 200 burst 100 amp continuous. Fast charger capable of 6 minutes to charge full. No MSDS Data. Biodegradable non toxic and non reactive to fresh and salty water. Disadvantage capacitance is about 118wh per kilo = 56wh per lb. Mine are 20,000 charge cycles and the spendy kind up to 100,000 charge cycles. 99% discharge rate full to empty= no lagg.

[@ElectricBikeLaboratory]

Yeah they are super impressive in their performance. Those are some crazy stats

[@robintaylor3860]

@@ElectricBikeLaboratory yeah I don't think I will have to replace them, ever.

[@ElectricBikeLaboratory]

If those become compact at some point they will definitely become the ultimate battery!

[@chrisperrywv]

I have some similar batteries to these… but I feel like you skimped on how you actually paralleled them and how you hooked up the bms…

[@ElectricBikeLaboratory]

We did we do have videos of those as well , send us an email and we'll send you the links to those.

[@TimSpeilberg]

How can I buy the same one you made from you?

[@ElectricBikeLaboratory]

We have this one on our website and if you have a frame that can hold 21700 cells or if you need a frame we have them. Were going to be selling a 72V55AH pack that fits in these frames for a really economical price . Website is www.affordableebikes.ca

[@akinnon2000]

Didnt you have anything to do with the ecopack's before starting this process ? No need to check each cells voltage you can just rip it open bulk and strap the modules together ? That's really nice.

[@ElectricBikeLaboratory]

Yeah they are super convenient! The vast majority of the packs hover right around 37V when we open them up and we do a quick check on them to make sure no dead cells of course but it is definitely quite a simple process :)

[@tabishahmed7836]

How do you check dead cells without dismantling the pack ?@@ElectricBikeLaboratory

[@CD31337]

​@@tabishahmed7836Do a capacity test on each parallel group ensuring there are no hotspots or increases in IR on any of the cells

[@jayhoody121]

What would a48v 60ah or 70ah battery go for ?

[@ElectricBikeLaboratory]

Feel free to message us directly

[@jayhoody121]

@@ElectricBikeLaboratory 🤩🤩will do

[@jayhoody121]

@@ElectricBikeLaboratory email ?

[@kevintran7720]

can you buld one for me

[@electricbikeretrovintage]

You skipped the part when you connected the bms.

[@ElectricBikeLaboratory]

Yes apparently I didnt turn the camera on 😭

[@michaelham6967]

How can I get ahold of you?

[@ElectricBikeLaboratory]

Got your FB message best way is usually by email [e-mail]

[@ppnayar700]

Hello, I am using Benling Aura electric scooter. The battery is 12 Volt ( 72 Volt 40 Ah battery) The cut off 84 Volt. Can you supply a new battery in the same specifications under Warrenty? Price?

[@ElectricBikeLaboratory]

Yep we can email us at [e-mail]

[@ppnayar700]

@@ElectricBikeLaboratory Hello

[@JP-qq2kn]

How much $ CAD for one of these built n shipped?

[@ElectricBikeLaboratory]

We're doing $175 per eco pack constructed into a pack + $100 for BMS (installed)

[@olderface9939]

FINALLYYYYY THANK YOUUU

[@shandrarathke7787]

I would love to have you build me a battery. If that is possible. Let me know

[@ElectricBikeLaboratory]

Yes, send us an email at [e-mail] , thanks!

[@catalinnicolaevici2061]

I might still go for the MolicelINR-21700-P45B for me what's your wheel KW?? I still have to do some investigations but I found 8KW brushless motors and wheel on hub for around 400$ from China also you get a speed controller for the motor but I have to be 100% sure there data is correct. I would be so mad if I spent 400$ from China. And man! Can you send me a link for real 15kw-20kw wheel motors please!! I want the bike I build to 😱 me lol 😂😂

[@retrograde330]

3:07

[@retrograde330]

2:10

[@Spunky_Lass]

That’s cool

[@ElectricBikeLaboratory]

Thank you ! :)

[@StickEm.z]

Why would you not just buy brand new lithium ion batteries? and run them in parallel. instead of buying prebuilt battery packs to then have to dismantle it. and redo the work again. Is there a benefit from it or something?

[@yamenkilane3473]

Can you answer me, my friend?

[@ElectricBikeLaboratory]

Sorry just responded to your last one! You can add as many as you'd like ;)

[@yamenkilane3473]

Thank you I did it 72 volt 75 amp 10 pack battery

[@gasisthepastendoil]

How is that supposed to be cheap?

[@Dus306]

price this out... then price out another 72v 38 ah battery lol

[@emptyempty1310]

Looks like a bomb

[@ElectricBikeLaboratory]

A few wrong moves and it is a bomb! Definitely for the experienced or patient and willing to learn and take it very slow. Something like this is no joke

[@emptyempty1310]

@@ElectricBikeLaboratory I'm not mathematical so I decided not to mess with building one

[@ZaneCovey-z8n]

All I can say is you are wearing rings while building a battery 🤦‍♂️

[@catalinnicolaevici2061]

Also I realized if I did go with the Molicel my battery would be outrageous In price! But I'll save weight and have quite possibly the most engery dense pack around. Could you imagine if that sucker cought 🔥 lol 😂 Runaaa wayyyy!!! Man! Each small 21700 cell is 45A 🤣🤣 I have the data sheet. It the battery choice in electronic super cars!. Yea...... I better either build my own circuits for the battery cause I can and do know how or find a company that won't twist my arm at least printing out the BCB bord for it. It might need it's own liquid cooling for the circuit boards running off a standalone pack for the pump and fans like a real vehicle or bike or a built PC. Man.... what am I getting into I better do some serious research. First the wheel! Then the battery! And then I'll worry about if it's Feasible to build.

[@kopparsulfat]

Stealth bomber... What a ripoff that was.

[@kopparsulfat]

@MustafaHussein-tf2sy way to expensive

[@Dus306]

get the clone frame

[@kopparsulfat]

@@Dus306 Talaria sting r are even better