Making batteries - 18650 PCB modules

[bencapobianco]

Jehu this looks like it could be your greatest pcb project ever! And I’ve been watching your videos since the first designs of the 7s pcbs with the aluminum stand-offs. You are the reason I got into DIY Li batteries I have bought a bunch of your products and love them all!
So glad you took the pcb approach this far!! Keep up the great work/content!!!

[ryanmowry]

Thank you for devoting your life to batteries and experimenting, finding out what works! would be impossible to iterate and prototype this fast if you had a normal day job! keep it up man your killing it! 👍👍

[ncg_gusto]

would like to meet and learn from this guy more than anyone in the world right now.

[GyroplaneJake]

This product is very exciting. Please stay focused on this, as this would make a great powerwall solution. It would be awesome if you can source the case, bms, batteries and all the pcb boards to build this product for a reasonable price. I also think it could be made better if you can connect the modules a little differently so that you know you will not lose contact between the modules and possible short out the battery. You are awesome, and I am addicted to your videos and your products. Keep up the amazing work.

[garryparker]

Keep us informed on this project. We really need this

[kscntycop]

Great video. I wish people knew the quality of what you sell. You put a lot of time and effort into providing good solid quality items for the DIY community and others to make things more affordable. Love your videos. Love your products. Great customer service. Keep it up Sir!

[skipbalk]

One issue I see, is that poor connections could occur over time. Given the increased resistance of poor connections, combined with typically high amps, it could create hotspots in the core of the battery. This could cause cell degradation and/or runaway thermals. I'd suggest to just screw the plates together.

[JerryScroggin]

I love it. I have 100s and 100s of 18650s. 48v 100a is great. I also need 14.2v. Voltage drop will put it at 13.8 which what all the ham radio and cb radio folks want. Look for parks on the air.

[nickwoo]

ok I was going to build a 24v system with your powerbox but now im going to wait for this!

[chadcarter]

if you develop it as a kit, where all you need to do is add the 18650s, ill become a vendor and sell them for you... this is great

[stevensmeagol]

Love the content just wish u ship to UK (without brutal import tax) thanks for doing all hard work and research

[MarkPrince]

Congratulations 👏👏👏 brother now you are not less then a ⭐
Best regards from Philippines 🇵🇭☕☕

[fredrickjura]

Hey Jehu did you ever finish the designs of the top and end PCBs on this

[SebasTian-odoz]

The best location for contacting pressure would be *concentric around the rod holes*, not in a line between the 2 holes.
The strips might even result in a warp like this () due to them protruding slightly and the forces generating a bending moment at the edges of those strips.
This is all theoretical though but I'd take that into consideration for the next iteration if possible.
Also make absolutely sure to use a torque wrench when everything hinges on the correct and consistent pressure generated from those nuts!
Tightening a nut more in one place than the others might likewise result in some material bending/drifting and lead to faulty contacting after a longer time period.
Also why not let there be a bit bigger holes rather than those needle sized ones in the intermediate spaces of the green board... so at least a tiny amount of cooling convection could happen if the cells would be mounted "standing".

[MadProfessor]

I'm thinking about buying your 24v 18650 diy pcb kits and was wondering if I can make two stacks like 5 boards each then connect via the plug in series to make 48v system. Is this possible? or would I let the magic smoke out and make the pixies angry?

[gregcarden]

I really think you meant 18650 batteries or is this a trick??
I always enjoy all of your information on the battery packs you build
Keep sharing the info

[fredrickjura]

Hi, Jehu Fred from Kenya here, been following you for years bro, keep up the good work. Want to try this out but can only see on type of PCB on PCBway, while on the video the assembly seems to have several designs. Mind sharing the complete BOM and designs for this kit?

[LogicalNiko]

I think if you either used a larger nickel strip on those contacts, or used a wide nickel strip bent in half along the long edge to provide a "spring" contact tab you would have extremely good contact pressure ensuring that even if something was slightly out of wack there would be a solid connection.

[kennethalmond]

I'd recommend cell level fusing - you'd need spot-weld strips with the little spiral on one side.

[sipneat]

Looking at the setup, is there anyway to make it 24v? I know 48 is the "thing" but I am all 24v... Love the ingenuity!!!