PCB Module for Micro USB Lithium-Ion Battery Charger

Arshmah Shahkar

It is a Lithium-ion battery charger that allows charging any device that can work on a 5V DC power supply. It provides nominal voltages of 3.7V per cell. To charge small portable devices like solar cells, headphones, mobile phones we cannot carry a heavy or large battery charger, we need a small battery charger module with the best battery management capacity. The size of this PCB battery module is very small, control of charging is very accurate and it can fully charge your devices.

Why Micro USB-B?

In my design, I am using a micro USB cable connector type B, as it is commonly found in portable devices like mobile phones. The size of this connector is small and it provides you with a greater speed of data transfer from one device to another.

Stages of Charging a Battery:

There are three stages of charging a battery:

  • Preconditioning charge
  • Constant-current fast charge
  • Constant-voltage trickle charge

In a pre-conditioning stage of charging the battery will slowly charge to the maximum level i.e. 5V after that, it will remain constant and in the last stage, it will decrease slowly.

The benefit of using the lithium-ion battery is to make the charger more stable in terms of charging again and again. These batteries provide better power efficiency than the other batteries.

Design files:

I have created the PCB design in KiCAD which is very simple to use. I have uploaded my PCB and schematic file online on Inventhub for the users and manufacturers. Anyone can view or download my design to implement and fabricate. This will help me save my time in terms that instead of visiting the manufacturer for fabrication, I can send him the release file of the project, he can download the ZIP file format from Inventhub and can fabricate my PCB.

Bill of Materials:

To complete and assemble my board design, I have uploaded my component’s list on Inventhub which contains each and every detail of the component’s size, footprint, and quantity. My component provider can download the file in CSV format and can deliver my components as per my design requirements.

To get detailed information on design implementation please visit the link below:


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