This project guide details building a lithium battery protection circuit using the TC4056 chip and the DW01 protection IC. This is crucial for ensuring the longevity and safety of your lithium-ion batteries in various applications. Protecting your batteries prevents overcharging, over-discharging, and overcurrent situations which can lead to damage, fire hazards, or premature battery failure. This project is valuable for anyone working with lithium batteries in DIY projects, robotics, or portable electronics.

This project can be used in many applications, including:

• Portable power banks
• Battery-powered robotics
• DIY electronic devices
• Remote sensors

Hardware/Components

The core components of this project are the TC4056 lithium battery charger and the DW01 battery protection IC (in video at 00:05). The TC4056 manages the charging process, while the DW01 provides crucial safety features (in video at 01:15). Additional components include MOSFETs (like the 8205A, in video at 07:01), resistors, LEDs, and a suitable enclosure. The project uses a micro USB input for charging (in video at 01:07) but can also accept direct input up to 8V (in video at 02:13).

Wiring Guide

The wiring diagram is essential for connecting all components correctly. Incorrect wiring can damage the components or create safety hazards. Refer to the video (in video at 08:20) for a detailed schematic. The wiring involves connecting the input power, the battery terminals, the load terminals, and the LEDs. Special attention should be paid to the connections with the DW01 protection IC (in video at 07:33) and the MOSFET driver (in video at 01:33).

Live Project/Demonstration

The video demonstrates the functionality of the circuit (in video at 00:23). Tests include charging the battery, measuring input and output currents, and evaluating the overcurrent, short-circuit, and over-discharge protections (in video at 00:35). The thermal camera footage (in video at 00:45) shows the heat distribution during operation, highlighting the importance of proper heat dissipation. The demonstration also shows how to connect multiple modules in parallel to increase the charging current (in video at 04:00). The video concludes by measuring the efficiency of the circuit (in video at 21:40).

Video Chapters

• [00:00] Introduction and Project Overview
• [01:07] Module Overview and Component Introduction
• [02:41] Datasheet Review and Specifications
• [05:17] Detailed Component Analysis
• [08:20] Schematics and Circuit Explanation
• [11:13] Verification of Protection Circuits
• [14:33] Explanation of Protection Mechanisms
• [17:34] Demonstration of Short Circuit Protection
• [18:13] Demonstration of Over Current Protection
• [20:51] Thermal Imaging and Efficiency Measurement