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Smart 18650 Battery Charger with OLED

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Bambu3Design

Bambu3Design

@Bambu3Design_5403999

3D-printed smart 18650 battery charger with OLED, real-time current monitoring, voltage, battery level, and mAh tracking

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Model information

Source
Printables
Category
Electronics
License
Creative Commons — Attribution — Noncommercial
DetailsFiles (2)Makes & comments (Makes: 0) (Comments: 0)Remixes (0)Collections (7)Related

Build your own 3D-printed smart 18650 battery charger with real-time charging monitoring!

This project combines a custom 3D-printed enclosure, an ESP32-C3 SuperMini, an INA219 current sensor, a TP4056 charging module, and an OLED display to create a compact and practical battery charging station.

⚡ Features

  • Real-time charging current monitoring in mA.

  • Charging capacity tracking in mAh.

  • Battery voltage measurement when not charging.

  • Estimated battery percentage displayed on the OLED.

  • Automatic battery detection with a "NO BATTERY" message.

  • Automatic switching between charging and idle modes.

  • Standalone operation without Wi-Fi or a computer.

🔧 Components

🖨 3D Printing

The enclosure is designed to accommodate the electronic components and provide a compact, organised charging station.

The design is suitable for PLA or PETG printing.

🔌 Wiring Diagram & Arduino Code

The complete wiring diagram is included in the project images to help you connect all the electronic components correctly.

The Arduino code is also available through the download link provided in the description.

https://bambu3design.com/smart-18650-battery-charger-with-oled/

🎥 Build Tutorial

A complete step-by-step tutorial, including assembly, wiring, programming, and testing, is available on my YouTube channel: Bambu3Design.

Download the 3D model, print the enclosure, and build your own smart battery charger!

Tags

displayprintedbatterychargerchargingsensorelectronicssmart18650printingprotectiontestermonitorreverseprojectvoltagepolaritylithiumcurrentionpercentage