Powerbank 6x18650

thingiverse

I had 6 18650 batteries from an old notebook battery and searched for a powerbank to print.Most designs either need a spot welder to connect the batteries or are designed for less than 6 cells.My powerbank is designed with enough space to use spring contacts to connect the batteries.Parts needed:1x PowerbankBody1x PowerbankCover1x Powerbank Button4x M3 screws ca. 10mm6x18650 lithium batteries (from a notebook battery)6x positive battery connectors6x negative battery connectors with springs1x Powerbank controller with LED display https://www.ebay.de/itm/304875126233wires, soldering iron, hotglue gun. Assembly: Print the body parts and the button. Solder all positive battery contacts in a row and attach them to the +terminal of the controller. Repeat for the negative battery contacts (with the springs) and solder them to the - terminal of the controller. Insert the batteries into the body and mark the spots for the negative and positive contacts. Attach the contacts to the body with hotglue. Insert the button into the round hole of the powerbank body the round side of the button facing outwards. Insert the controller into the body and position it with the switch facing the sqaure side of the button. Check if the controller can be switched on using the button. Hotglue the controller in place. Charge all 6 18650 batteries to the same voltage.Insert the batteries into the spring contacts and make sure they are connected in parallel. Close the powerbank with the 4 M3 screws.