200Ah LiFePo4 battery assembly with DiyBMS mount

thingiverse

Designed for building a pack of LiFePo4 cells into a battery with nice cable management, and most importantly to put a DiyBMS cell module on top of each cell, and avoid a cable mess :) Read about DiyBMS, a project by Stuart Pittaway, here: https://github.com/stuartpittaway/diyBMSv4 The 200Ah cells I used are common AliExpress cells with dimensions (L x W) 173 x 54mm. Height doesn't matter. When top and bottom is mounted, four 5mm rods with washers and nuts go through holes in the modules to form a pack. Not for compression, but to keep things together. Small dents allow rows to be clicked on top of each other. The lid hide the cables and busbars for safety, but allow the modules to get rid of heat when balancing. The space created between the cells made extra isolation unnessesary in my view. The cell module temperature sensor cable fit in a groove under the top mount, so the sensor is a bit apart from the potentially hot cell modules. I added a piece of heat shrink over the small break-out temp sensor. Works very well. I printed all in PLA with moderate infill, maybe 20%. Designed in Fusion360. If you need CAD files to modify for other cell sizes, 280Ah etc. being wider, get in touch with me.