ps915/diy_18650_charger

Reverse Protected 18650 Lithium-Ion Charging Unit

Reverse Protected 18650 Lithium-Ion Charging Unit

I started to design a simple 4in1 PCB for charging 18650 cells while looking at my actual charging rig attached to some wood! Some time ago, i teached myself to design PCBs for hobby use. I really love PCB Design and started this little project. Its a 4x Charger protected with a 3A diode and a 2A glass fuse.

I am using this for this porject: https://blog.seidel-philipp.de/xxl-powerhouse-diy-feldakku-aus-18650-zellen/

Features

• 4A charging current
• mounting holes
• easy soldering
• "clean" design
• reverse polarity protection with fuse and diode
• easy expandable (just connect them in series)

Support me

if you like this project and what to support me and my work, you can do it via Patreon or PayPal

What do you need

I used the cheapest components to get the lowest price possible. Estimated costs per board including hardware:

• 1x PCB $4.9 (you will get 10 boards)
• 4x TP4056 Aliexpress / Banggood
• 4x glass fuse 2A Aliexpress
• 8x glass fuse holder Aliexpress
• 4x diode (1N5402 3A 200 V, DO-41) Aliexpress
• 1x 18650 holder Aliexpress / Banggood
• 16x RM2.54 Pin Header Aliexpress / Banggood

Shematics

Ordering the PCB

you can order the PCB from china:

1. Go to FUSION PCB www.seeedstudio.com
2. Upload gerber file (TP4056_4in1_charger_final.zip)
3. verify order settings

• Base Material: FR-4
• No. of Layers: 2
• PCB Dimensions: 100mm x 100mm
• PCB Quantity: 10 (you will get 10 identical PCBs - thats the minimum quantity)
• No. of Different Designs: 1
• PCB Thickness: 1.6mm
• PCB Color: Red
• Surface Finish: HASL
• Minimum Solder Mask Dam: 0.4mm
• Copper Weight: 1oz
• Minimum Drill Hole Size: 0.3mm
• Trace Width / Spacing: 6/6 mil
• Blind or Buried Vias: No
• Plated Half-holes / Castellated Holes: No
• Impedance Control: No

3. add to cart
4. pay the order! Done!
5. share unused PCBs with the community! =)

Connection PCBS

Just solder these PCBs together! Please apply solder on the open traces to increase trace width!