SASKATE 3.7V Lithium Battery Over Discharge Module User Manual

1. Introduction

This manual provides detailed instructions for the SASKATE 3.7V Lithium Battery Over Discharge Module. This module is designed to protect 3.7V lithium batteries from overcharge and over-discharge conditions, ensuring the longevity and safety of your battery-powered equipment. It also offers short circuit and overcurrent protection.

Figure 1: SASKATE 3.7V Lithium Battery Over Discharge Module (Top View)

The image displays the compact green circuit board of the module, featuring several surface-mounted components including integrated circuits and resistors. Four circular connection pads are visible on one side, and two larger rectangular pads on the other.

2. Setup and Wiring

Proper wiring is crucial for the correct operation and protection provided by the module. Follow the instructions below carefully.

2.1 Wiring Diagram and Connections

• B-: Connect to the negative terminal of the battery.
• B+: Connect to the positive terminal of the battery.
• P+: Connect the positive terminal of the charger or load.
• P-: Connect the negative terminal of the charger or load.

Figure 2: Module Back View with Wiring Labels

This image shows the reverse side of the module, which is a plain green circuit board. Clearly labeled connection points (B-, B+, P+, P-) are visible, indicating where the battery, charger, and load should be connected.

2.2 Initial Activation

Important Notice: Please activate the board during the second connection. Otherwise, there may be no voltage output. This typically involves connecting the battery and then applying a charge for the first time to initialize the protection circuit.

3. Operating Principles

The SASKATE Over Discharge Module continuously monitors the voltage of the connected 3.7V lithium battery.

• Overcharge Protection: When the battery voltage reaches the overcharge detection voltage (4.28±0.05V), the module will stop charging to prevent overcharging. Charging will resume when the voltage drops to the overcharge release voltage (4.26±0.05V).
• Over-Discharge Protection: If the battery voltage drops to the over-discharge detection voltage (2.5±0.1V), the module will cut off the load to prevent deep discharge, which can damage the battery.
• Overcurrent Protection: The module provides protection against excessive current draw, typically activating between 1-3A with an overcurrent release at 3.2±0.2A.
• Short Circuit Protection: In the event of a short circuit, the module will immediately cut off the output to protect the battery and connected devices.

Figure 3: Module Features Overview

This image shows the module with an overlay of text summarizing its key features: "Application field: 3.7V lithium battery 18650", "Overcharge protection, overdischarge protection", and "Short circuit protection, over current protection".

4. Maintenance

The SASKATE Over Discharge Module is designed for durability and requires minimal maintenance.

• Handling: Handle the module with care to avoid damaging the electronic components. Avoid bending or applying excessive force.
• Environment: Keep the module in a dry environment, away from moisture, dust, and extreme temperatures.
• Cleaning: If necessary, gently clean the module with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Inspection: Periodically inspect the wiring connections to ensure they are secure and free from corrosion.

5. Troubleshooting

If you encounter issues with your SASKATE Over Discharge Module, refer to the following common problems and solutions.

6. Specifications

Key technical specifications for the SASKATE 3.7V Lithium Battery Over Discharge Module:

7. Warranty and Support

For any questions, technical assistance, or warranty inquiries regarding your SASKATE 3.7V Lithium Battery Over Discharge Module, please contact your retailer or the manufacturer directly.

Please refer to your purchase documentation for specific warranty terms and conditions.