18650 cell holder

thingiverse

This is my own design, I was disappointed with the available options already uploaded with most if not all being old and not workable eg not fitting together or not fitting a cell once printed, also due to lock down getting these from anywhere was proving difficult so while I have a lot of time I dont have all the parts to build more of my Powerwall. So this design allows for single and a 4x5 layout for easy building of packs, I dont use the singles but used them to prove it all fits together. the fit is tight and not ment to be pulled apart once put together although possible you might snap so dont unless you dont want it to be usable again. It doesn’t quite fit the std ones you can buy so just print some more or use on opposite end as the layout matches the std distance between cells so the std nickel strips work fine including the fused sheets which I use on both ends. The reason for the 6mm holes is im using this design to stack directly on top of each other and bolt all the way through a stack to form a tight pack, i will also add once designed a plate/bracket to go on top and bottom of the packs and possible inserts to prevent shorting on the nickel strips top and bottom. print it upside down and with no supports, i prefer to use a raft esp you can get flaring of the dove tails, if your printer is setup better than mine you might not need the raft but watch out for the dove tails flaring causing it to split the female sides when put together. I tested at 0.16 and the results are not very good so go lower, im using 0.12 with out any issues but print the singles and work out what works for you. I was generous with the hole size and used a high sided circle to prevent the flats reducing the diameter and allowing for some sticky cells to still fit reducing the time to process cells that can be often found on laptop recycled cells. feel free to reduce the scale if using new cells if you want a tighter fit but i needed to cover all manner of variances. the print is really solid and much strong then the cheap Chinese holders. I might look at trying to reduce the filament use and additional sizes if ppl want them so please add comments or any requests. I've uploaded a few photos including the one printed at 0.16 which is a bad print so you can see why to go smaller. I used cura to print all std settings except the bed on 60c and changed to raft, i print 2 5x4's at one time next to each other and the print time is around 8-9 hours you might be able to get 4 on one plate if your place it big enough and flat enough to not have one edge curl up. v1.0.1 uploaded of the single as i spotted a small miss alighment on one of the dove tails.