ModuLOL - 3S - Modular Battery System - 18650

prusaprinters

<p>Hello,</p><p>This is the second version of the “ModuLOL” modular battery pack system. (3S /12V)</p><p>The idea is to have a battery pack and several attachable current consumers.</p><p>Mainly I use the flashlight and the fan (for BBQ).</p><p>Important: I am not good with electronics… dont trust me. There will be quite some skill needed for soldering. And soldering Li-Ion batteries is actually not recommended.</p><h3><i><strong>1. &nbsp;Project overview</strong></i></h3><p>We have the battery pack with three 18650 Li-ION batteries in series connection (12V), one 3S-BMS board and a switch. And for connection we have a dovetail geometry with a XT60 adapter.</p><p>All this melted together with a big chunk of tinsolder. (spot welding recommended, but I dont have this)</p><p>So with the BMS we have over charge protection, discharge protection, shortage protection. The only this is the charging. I am not sure the BMS board can deliver a good charging curve. So I charge the battery pack with an external Li Ion charger (IMAX B6AC)</p><p>&nbsp;</p><h3><i><strong>2. Battery (Case Part 1)</strong></i></h3><p><strong>BOM</strong>:&nbsp;<br>Switch with built in size 19,2x 12,9 mm.<br>Slotted screw M3, (3x)<br>Square M3 nut. 6x6mm 1mm thick. (3x)<br>BMS Board 3S. (the blue long one, 10A, BMS, PCM)&nbsp;<br>18650 Li Ion battery (I took old ones from my laptop with 1000 mAh) (3x)<br>Male XT60 adapter</p><p><strong>DESCRIPTION:</strong><br>The battery case is built with 3 prints.<br>First print the insert and solder the Li Ion batteries to the BMS board.<br>Then solder the switch to the insert and the XT60 with some cable to the BMS and the switch.<br>Print the the housing and put the soldered fillet inside.<br>Then print the top cover and pull the XT60 with cable to the cover hole.<br>Screw the top case with the M3 to the housing. Probably the screws needed to be shortened.<br>Use another M3 screw to fix the XT60 to the cover.</p><p><strong>PRINT INSTRUCTIONS:</strong></p><p>The hull could be printed without support.<br>I created a thin layer at the bottom for adhesion. needs to be cut out after.</p><h3><i><strong>3. LED 16x</strong></i></h3><p><strong>BOM:</strong><br>XT60 adapter (female)<br>Slotted screw M3<br>Square M3 nut. 6x6mm 1mm thick. (3x)<br>White LED ca 3,2V (16x)<br>Some cable + resistor</p><p><strong>DESCRIPTION:</strong><br>This is a simple 16x 5mm white LED adapter.<br>I put 4 rows with 4LEDs in series connection.&nbsp;<br>Dont forget a resistance (like I did)</p><h3><i>4. … DIY</i></h3><p>I created some consumers like a fan or a 10W LED.<br>These parts were built with very old electric parts I had around.<br>Therefore I would suggest if you have some ideas take the adapter geometry of the LED and design your own part.</p><p>Some 3D files I put in here without instructions.</p><h3><br>&nbsp;</h3><p>&nbsp;</p>