How to Use 5v 3A Li-ion Fast Charging Module: Examples, Pinouts, and Specs

The 5V 3A Li-ion Fast Charging Module by AITIAO (Part ID: Black) is a versatile and efficient charging solution designed for lithium-ion batteries. This module provides a stable 5V output and can deliver up to 3A of current, making it ideal for fast charging applications. It is commonly used in portable electronics, DIY projects, and any application requiring efficient battery management.

• Portable Electronics: Smartphones, tablets, and other handheld devices.
• DIY Projects: Custom battery packs, robotics, and IoT devices.
• Battery Management Systems: Ensuring safe and efficient charging of lithium-ion batteries.
• Power Banks: High-capacity power storage solutions.

1. Power Supply Connection:

   • Connect the IN+ pin to a stable 5V power supply.
   • Connect the IN- pin to the ground of the power supply.

2. Battery Connection:

   • Connect the B+ pin to the positive terminal of the lithium-ion battery.
   • Connect the B- pin to the negative terminal of the lithium-ion battery.

3. Output Connection:

   • Connect the OUT+ pin to the positive terminal of the load.
   • Connect the OUT- pin to the ground of the load.

4. Status Indicators:

   • The CHG pin will be active low (0V) when the battery is charging.
   • The DONE pin will be active low (0V) when the battery is fully charged.

• Heat Dissipation: Ensure adequate ventilation or heat sinking to prevent overheating.
• Input Voltage: Use a stable 5V power supply to avoid damaging the module.
• Battery Compatibility: Only use with compatible lithium-ion batteries to ensure safety and efficiency.
• Polarity: Double-check connections to avoid reverse polarity, which can damage the module.

/*
 * Example code to monitor the charging status of the 5V 3A Li-ion Fast Charging
 * Module using an Arduino UNO.
 */

const int chgPin = 2;  // Pin connected to CHG status indicator
const int donePin = 3; // Pin connected to DONE status indicator

void setup() {
  pinMode(chgPin, INPUT);
  pinMode(donePin, INPUT);
  Serial.begin(9600);
}

void loop() {
  int chgStatus = digitalRead(chgPin);
  int doneStatus = digitalRead(donePin);

  if (chgStatus == LOW) {
    Serial.println("Battery is charging...");
  } else if (doneStatus == LOW) {
    Serial.println("Battery is fully charged.");
  } else {
    Serial.println("Battery is not connected or already charged.");
  }

  delay(1000); // Check status every second
}

1. Module Overheating:

   • Solution: Ensure proper ventilation and consider adding a heat sink.

2. No Output Voltage:

   • Solution: Check input voltage and connections. Ensure the power supply is stable and within the specified range.

3. Battery Not Charging:

   • Solution: Verify battery connections and ensure the battery is compatible with the module.

4. Incorrect Status Indication:

   • Solution: Check the connections to the status indicator pins and ensure they are correctly interfaced with the monitoring system.

• Double-Check Connections: Ensure all connections are secure and correctly oriented.
• Use a Multimeter: Measure input and output voltages to verify proper operation.
• Monitor Temperature: Keep an eye on the module's temperature during operation to prevent overheating.
• Consult the Datasheet: Refer to the manufacturer's datasheet for detailed technical information and guidelines.

By following this documentation, users can effectively integrate the 5V 3A Li-ion Fast Charging Module into their projects, ensuring efficient and safe battery charging.