How to Use Type-c Power Bank Module: Examples, Pinouts, and Specs

The Type-C Power Bank Module is a compact and versatile electronic component designed for energy storage and delivery. Manufactured by Arduino/ESP32, this module features a USB Type-C interface for efficient charging and discharging of devices. It is commonly used in portable power bank applications, DIY electronics projects, and as a power supply for microcontroller-based systems.

• Portable power banks for charging smartphones, tablets, and other USB devices.
• Power supply for Arduino, ESP32, and other microcontroller projects.
• Backup power solutions for small electronic devices.
• DIY electronics projects requiring a rechargeable power source.

The following table outlines the key technical details of the Type-C Power Bank Module:

The module typically includes the following pins and interfaces:

1. Connect the Battery: Attach a 3.7V Li-ion or LiPo battery to the BAT+ and BAT- terminals. Ensure correct polarity to avoid damage.
2. Power Input: Use a USB Type-C cable to connect the module to a 5V power source for charging the battery.
3. Power Output: Connect your load (e.g., Arduino, ESP32, or other devices) to the OUT+ and OUT- terminals. The module will regulate the output to 5V.
4. Monitor Status: Use the onboard indicator LEDs to monitor charging, discharging, and battery status.

• Battery Selection: Use only compatible 3.7V Li-ion or LiPo batteries with appropriate capacity and discharge ratings.
• Heat Management: Avoid overloading the module to prevent overheating. Ensure proper ventilation if used in enclosed spaces.
• Polarity Check: Double-check all connections to ensure correct polarity, especially for the battery terminals.
• Arduino/ESP32 Integration: When powering an Arduino or ESP32, connect the OUT+ to the 5V pin and OUT- to GND.

If you are using the Type-C Power Bank Module to power an Arduino UNO, you can monitor the battery voltage using an analog pin. Here's an example:

// Example code to monitor battery voltage using Arduino UNO
const int batteryPin = A0; // Analog pin connected to battery voltage divider
float batteryVoltage = 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
  // Convert the analog value to voltage (assuming a 10-bit ADC and 5V reference)
  batteryVoltage = (sensorValue / 1023.0) * 5.0;
  
  // Print the battery voltage to the Serial Monitor
  Serial.print("Battery Voltage: ");
  Serial.print(batteryVoltage);
  Serial.println(" V");
  
  delay(1000); // Wait for 1 second before the next reading
}

Note: Use a voltage divider circuit if the battery voltage exceeds the Arduino's ADC input range.

1. Module Not Charging the Battery:

   • Ensure the USB Type-C cable and power source are functioning properly.
   • Verify the battery is connected with the correct polarity.
   • Check for any physical damage to the module.

2. No Output Voltage:

   • Confirm the battery is charged and connected correctly.
   • Inspect the OUT+ and OUT- connections for loose wires or poor contact.

3. Overheating:

   • Reduce the load current if the module becomes excessively hot.
   • Ensure proper ventilation around the module.

4. LED Indicators Not Working:

   • Verify the module is receiving power.
   • Check for damaged or faulty LEDs.

Q1: Can I use this module with a 12V battery?
A1: No, this module is designed for 3.7V Li-ion or LiPo batteries only. Using a 12V battery may damage the module.

Q2: What is the maximum load current the module can handle?
A2: The module can handle up to 2A of output current. Exceeding this limit may trigger the protection circuit or damage the module.

Q3: Can I charge the battery and power a device simultaneously?
A3: Yes, the module supports simultaneous charging and discharging, but ensure the total current does not exceed the module's capacity.

Q4: How do I adjust the charging current?
A4: Some models allow adjustment of the charging current via onboard resistors or jumpers. Refer to the specific model's datasheet for details.