Battery case 18650 with room for charger and step-up converter

thingiverse

A protective case for a rechargeable battery pack, specifically designed to accommodate an 18650 lithium-ion cell, incorporates space for an 80x20mm perfboard. This perfboard serves as a platform for both a charger circuit and a step-up converter. A 12x19mm cutout is provided for a switch that separates the output of the charger from the input of the step-up converter. Key components used in this design include: - An 80x20mm perfboard - A USB rechargeable battery pack with a built-in protector, the TP4056 - A step-up converter, the MT3608 - A snap-on switch designed for a cutout of 19x12mm, rated at 250V/3A and measuring 19mm in height Assembly involves: - Attaching both boards to the perfboard using 0.7mm wire as stand-offs - Utilizing the battery terminals on the TP4056 board as contact points - Wrapping uncoated copper wire around the plastic springs of the battery terminals - Connecting the loops to the battery terminals via isolated wire - Linking ground/minus directly between the output pad of the TP4056 and the input pad of the MT3608 - Routing plus through the on-off switch, which can be accomplished using 6.35mm crimp connectors by cutting off the crimp part and soldering the wires along the cut line