4S Li-ion battery pack

thingiverse

This is my other version of a 14.4 V (4S) battery pack for Li-ion batteries of the 18650 type, available at https://www.thingiverse.com/thing:3905901. It includes a battery management system (BMS) and can deliver about 3000 mAh with only a mass of 255 grams. It utilizes a commercially available battery holder instead of DIY construction like in the other version and adds the BMS along with a 3D printed case bottom. To assemble this pack, you will need the following additional parts (BOM) besides this printed part: A 4S BMS A 4S battery holder Four Li-ion batteries, type 18650 Four self-tapping screws, size 2.9x9.5 mm Wire with a cross-sectional area of 1.5 and 2.5 mm² Total material cost, including the batteries, should be under 30 euros, and you can build the pack in less than an hour. I have published comprehensive building instructions (in German, with pictures) for both versions at http://www.oe1cgs.at/144-v-li-ionen-akkupack/, which also include sources for buying the necessary parts.