View attachment 78744Here ya go. I have some 26550 lifepo4 cells I’m going to test the electronics with, but I’m waiting on some cell holders to come in the mail. My main batteries are in Hawaii, the boxes final destination.
As for placement advice, you’ll need a metal pick to punch holes in the boxes ribs so that you can drill a small hole for the zip ties. I used a caliper/micrometer to measure and make the locations of the holes I need to punch through for the terminals, shunt readout and battery disconnect. I used a dreml with a small cut-off wheel to cut the hole for the shunt readout and hole punch drill bits to make holes for the terminals and battery disconnect. I am using flexible bus bars to avoid needing to compress the batteries and will put foam between the cells to allow for expansion. I may also raid the batteries up off the bottom the box to allow for more width of the batteries to expand, as the box is slightly tapered in form with the opening being wider than the base. I will be punching a hole in the side of the lid next to the 12v bus to allow for hooking up 12v devices. I have a clamp that fits in that hole and clamps the wires going through it so they can’t be pulled out. The clamp is a standard piece that goes in gang box electrical junctions and can be found at any hardware store. The shunt is powered by the 12v bus and fused. The 50 amp fuse and holder for the 24v - 12v buck converter can be found at auto parts stores. I’ll power mine up when I get the battery holders. I’m going to top balance then just like I will do with my eve cells, as dry run. I will put kaptom tape over any exposures terminals after I test and tighten. I’d like to get a flir camera to examine the setup for any hotspots. I think my test batteries can only supply 40 amps, so I won’t be able to test the bms on over current protection.
