LiPo Charger USB v18.02

Overview

Lithium polymer battery unit. Charges and maintains battery from USB 5V, output 5V over USB, allows data to pass through.

LiPo is same as lithium batteries. The Po (polymer) refers to how it's packaged - [1]

Goals

• No need to remove for basic operations
  • Charge through panel mounted USB port
  • Upload Arduino skectches through USB port
  • On off switch

Tentative BOM

• USB A Female Breakout Sparkfun

• LiPo Battery Sparkfun
  • Sparkfun

• LiPo Charger "Battery Babysitter" Sparkfun

• Boost Converter w/ charger Sparkfun

• 100K Resistor mouser

• Female Headers

• Male Jumper Wires

• USB B Panel Mount - mouser
  • Panel Mount Cover - mouser

• On/Off/On DPDT Toggle Switch grainger

Case

3D printed to mount and encase circuit boards in a end-user-friendly manner.

$fn=32;

SFusbbo();

translate([1.08+(0.1),0,0.2195-0.1165])
SFbbs();

translate([0,0.8+(0.1),0])
SFlipow();

LiPoUSBCase();

module SFbbs() {
    difference(){
    union(){
    cube([1.325,1.3,0.065]);  //PCB
    translate([0.42-(0.3155/2),1.3-1.32,0.065])
    cube([0.3155,0.225,0.168-0.065]);
    
    //usb heigh w/pcb 0.168
    //height to center of usb   0.1165
    //usb width 0.3155
    //usb depth 0.225
    //usb center to next edge 0.42
    //usb pcb width 1.32
    
    translate([1.325-0.305-0.1,0.515-(0.315/2),0.065])
    cube([0.305,0.315,0.2845-0.065]);
    
    //batin center to next edge .515
    //batin width 0.315
    //batin height /pcb 0.2845
    //depth 0.305
    //from edge 0.1
}// end union

    translate([(1.325/2)-(1.1/2),(1.3/2)-(1.1/2),0]){
    translate([1.1,1.1,0])    
    cylinder(d=0.125,h=0.065);
    translate([1.1,0,0])    
    cylinder(d=0.125,h=0.065);
    translate([0,1.1,0])    
    cylinder(d=0.125,h=0.065);
    translate([0,0,0])    
    cylinder(d=0.125,h=0.065);
    } //hole group translate
}//end difference
    
    //hole c2c 1.1 x 1.1 D = 0.125
}

module SFusbbo() {
difference(){
    union(){
    cube([1.025,0.8,0.065]);  //PCB
    translate([(1.025/2)-(0.52/2),0.8-0.908,0.332-(0.225)])
    cube([0.52,0.572,0.225]);  //USB
    } //end union
    translate([(1.025/2)-(0.8125/2),(0.8/2)-(0.6125/2),0]){
    translate([0.8125,0.6125,0])    
    cylinder(d=0.125,h=0.065);
    translate([0.8125,0,0])    
    cylinder(d=0.125,h=0.065);
    translate([0,0.6125,0])    
    cylinder(d=0.125,h=0.065);
    translate([0,0,0])    
    cylinder(d=0.125,h=0.065);
    } //hole group translate
} //end difference
    //height to USB center 0.2195
    //usb height 0.332
    //usb thickness 0.2775  0.225
    //usb width .565    0.52
    //usb depth .572
    //pcb width with USB .908
    //wall thickness 0.9
    //bottom through hole sticking out 0.16
    //hole c2c 0.8125 x 0.6125 D = 0.125
}

module SFlipow() {
    cube([1.08,0.524,0.065]);  //PCB
    
}

module BAT2000() {
    cube([2.68,1.97,0.065]);  //PCB
    
    
}

module LiPoUSBCase() {
        translate([(1.025/2)-(0.8125/2),(0.8/2)-(0.6125/2),0]){
    translate([0.8125,0.6125,0]){    
    cylinder(d1=0.11, d2=0.09 ,h=0.2195);
    translate([0,0,-0.16])    
    cylinder(d=0.18,h=0.16);
    }
    translate([0.8125,0,0]){    
    cylinder(d1=0.11, d2=0.09 ,h=0.2195);
    translate([0,0,-0.16])
    cylinder(d=0.18,h=0.16);
    }
    translate([0,0.6125,0]){    
    cylinder(d1=0.11, d2=0.09,h=0.2195);
    translate([0,0,-0.16])
    cylinder(d=0.18,h=0.16);
    }
    translate([0,0,0]) {   
    cylinder(d1=0.11, d2=0.09,h=0.2195);
    translate([0,0,-0.16])
    cylinder(d=0.18,h=0.16);            
    }        
    } //hole group translate
    
    
}
 

Wiring Diagram

edit

See Also

• MicroTrac Controller v18.02
• USB - Wikipedia
• Shottky Diode - Wikipedia