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

A battery case for 18650 Lipos with room for a perfboard 80x20 mm (e.g. to house both a charge circuit and a step-up converter). Cutout for a 12x19 mm switch to separate the (+) output of the charger/protector from the input of the step-up converter.

Parts used:

• Perfboard 80x20 mm
• USB LiPo Charger/Protector TP 4056 (board version with integrated output overload/undervoltage cutoff)
• Step-Up Converter MT 3608.
• On/Off switch snap-in for cutout 19x12 mm, 250V / 3A, height beneath front panel 19mm.

Assembly:

• both boards soldered with 0,7 wire as stand-off onto the perfboard.
• use the battery terminals of the TP4056 board as contact points
• use some loops of uncoated copper wire around the plastic springs for the battery terminals.
• use isolated wire to connect the loops to the battery terminals of the TP4056
• connect ground/minus directly between TP4056 output pad and MT3608 input pad
• connect plus through the on-off switch. Can be made with 6.35 mm crimp connectors if you cut off the crimp part and solder the wires along the cut line.

Print Settings

Printer:

TronXY X5S

Rafts:

Doesn't Matter

Supports:

Doesn't Matter

Resolution:

0.6 mm nozzle, 0.25 mm layer height

Infill:

15%

Filament:

gray transparent