How to Use 2S 2A TYPE C CHARGING MODULE: Examples, Pinouts, and Specs

The 2S 2A TYPE C CHARGING MODULE is a compact and efficient charging solution designed for lithium-ion battery packs with two cells connected in series (2S configuration). It features a USB Type-C interface for modern and reliable power delivery, supporting a maximum charging current of 2A. This module is ideal for applications requiring safe and efficient charging of 7.4V lithium-ion battery packs.

• Power banks and portable battery packs
• DIY electronics projects with 2S lithium-ion batteries
• Robotics and remote-controlled devices
• Backup power systems
• Consumer electronics requiring USB Type-C charging

The following table outlines the key technical details of the 2S 2A TYPE C CHARGING MODULE:

The module has the following pinouts and connections:

1. Connect the Battery Pack:
   • Attach the positive terminal of the 2S lithium-ion battery pack to the B+ pin.
   • Attach the negative terminal of the battery pack to the B- pin.
2. Connect the Load (Optional):
   • If you want to power a load while charging, connect the load's positive terminal to P+ and the negative terminal to P-.
3. Power the Module:
   • Use a USB Type-C cable to connect the module to a 5V power source, such as a USB wall adapter or power bank.
4. Monitor Charging:
   • The module typically includes an LED indicator to show the charging status:
     • Red LED: Charging in progress.
     • Green LED: Charging complete.

• Ensure the battery pack is a 2S configuration (7.4V nominal voltage). Using an incorrect battery configuration may damage the module or the batteries.
• Use a high-quality USB Type-C cable and a power source capable of delivering at least 2A for optimal performance.
• Avoid short-circuiting the B+ and B- terminals, as this can damage the module and the battery pack.
• Do not exceed the module's maximum input voltage of 5V to prevent damage.
• Ensure proper ventilation during charging to prevent overheating.

If you are powering an Arduino UNO with a 2S lithium-ion battery pack charged by this module, connect the P+ and P- terminals to the Arduino's VIN and GND pins, respectively. Below is an example Arduino sketch to monitor the battery voltage:

// Example code to monitor battery voltage using Arduino UNO
const int batteryPin = A0; // Analog pin connected to battery voltage divider
float voltage = 0.0;

void setup() {
  Serial.begin(9600); // Initialize serial communication
  pinMode(batteryPin, INPUT); // Set the battery pin as input
}

void loop() {
  int sensorValue = analogRead(batteryPin); // Read the analog value
  voltage = sensorValue * (8.4 / 1023.0); // Convert to voltage (8.4V max)
  
  // Print the battery voltage to the Serial Monitor
  Serial.print("Battery Voltage: ");
  Serial.print(voltage);
  Serial.println(" V");
  
  delay(1000); // Wait for 1 second before the next reading
}

Note: Use a voltage divider circuit to scale down the battery voltage to a safe range (0-5V) for the Arduino's analog input pins.

1. Module Not Charging the Battery:

   • Cause: Incorrect battery connection or damaged battery.
   • Solution: Verify the battery pack is properly connected to the B+ and B- terminals. Ensure the battery is functional and within the supported voltage range.

2. LED Indicator Not Turning On:

   • Cause: Insufficient input power or faulty USB cable.
   • Solution: Check the USB Type-C cable and ensure the power source can deliver at least 2A.

3. Overheating During Charging:

   • Cause: Poor ventilation or excessive load on the module.
   • Solution: Ensure the module is placed in a well-ventilated area. Avoid exceeding the maximum load current.

4. Battery Not Fully Charging:

   • Cause: Faulty battery or insufficient input current.
   • Solution: Replace the battery if it is old or damaged. Use a power source capable of delivering 2A.

• Can I use this module with a single-cell (1S) battery? No, this module is specifically designed for 2S lithium-ion battery packs. Using it with a 1S battery may result in improper charging or damage.

• What happens if I connect a power source with more than 5V? The module may be damaged if the input voltage exceeds 5V. Always use a 5V power source.

• Can I charge and discharge the battery simultaneously? Yes, the module supports simultaneous charging and discharging. However, ensure the load does not exceed the module's current rating.

• Is the module compatible with fast-charging protocols? No, the module operates at a fixed 5V input and does not support fast-charging protocols like Quick Charge or Power Delivery.