How to Use 리튬폴리머 TW501220: Examples, Pinouts, and Specs

The 리튬폴리머 TW501220 is a lightweight, high-energy-density lithium polymer (LiPo) battery manufactured by Mini Battery. This compact power source is ideal for applications requiring portability and efficiency. Its slim design and reliable performance make it a popular choice for wearable devices, IoT gadgets, drones, and other portable electronics.

• Wearable devices (e.g., fitness trackers, smartwatches)
• Internet of Things (IoT) devices
• Remote-controlled drones and toys
• Portable medical equipment
• Compact consumer electronics

Below are the key technical details of the 리튬폴리머 TW501220 battery:

The 리튬폴리머 TW501220 typically comes with two wires for connection:

1. Connection:
   • Connect the red wire to the positive terminal of your circuit.
   • Connect the black wire to the ground or negative terminal.
2. Charging:
   • Use a LiPo-compatible charger with a constant current/constant voltage (CC/CV) charging profile.
   • Ensure the charging voltage does not exceed 4.2V.
3. Discharging:
   • Avoid discharging the battery below 3.0V to prevent damage.
   • Use a protection circuit module (PCM) to safeguard against over-discharge, overcharge, and short circuits.

• Safety: Never puncture, crush, or expose the battery to fire or water.
• Storage: Store the battery at 40-60% charge in a cool, dry place if not in use for extended periods.
• Balancing: For applications requiring multiple batteries in series, use a battery management system (BMS) to ensure balanced charging and discharging.
• Arduino Integration: When using with an Arduino UNO, ensure the battery is connected to a voltage regulator or a shield that supports LiPo batteries.

// This code reads the battery voltage using an analog pin on the Arduino UNO.
// Ensure a voltage divider is used to step down the battery voltage to a safe level
// for the Arduino's analog input (maximum 5V).

const int batteryPin = A0; // Analog pin connected to the voltage divider
const float voltageDividerRatio = 2.0; // Adjust based on your resistor values
const float referenceVoltage = 5.0; // Arduino UNO's reference voltage

void setup() {
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  int rawValue = analogRead(batteryPin); // Read the analog value
  float batteryVoltage = (rawValue / 1023.0) * referenceVoltage * voltageDividerRatio;

  // 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
}

• Use a voltage divider circuit to safely measure the battery voltage with the Arduino.
• Replace voltageDividerRatio with the actual ratio based on your resistor values.

1. Battery Not Charging:

   • Cause: Charger not compatible or faulty.
   • Solution: Use a LiPo-specific charger and verify the charging voltage is 4.2V.

2. Battery Drains Quickly:

   • Cause: Over-discharge or high current draw.
   • Solution: Avoid discharging below 3.0V and ensure the load does not exceed the maximum discharge current.

3. Battery Swells or Heats Up:

   • Cause: Overcharging, over-discharging, or physical damage.
   • Solution: Stop using the battery immediately and dispose of it safely.

4. Arduino Fails to Read Voltage:

   • Cause: Incorrect voltage divider or wiring.
   • Solution: Verify the resistor values in the voltage divider and check all connections.

• Q: Can I connect this battery directly to a 5V circuit?
  A: No, the nominal voltage of this battery is 3.7V. Use a boost converter to step up the voltage to 5V if required.

• Q: How long does it take to charge the battery?
  A: Charging at the standard rate of 0.5C (50mA) will take approximately 2-3 hours.

• Q: Is it safe to use this battery in extreme temperatures?
  A: The battery operates safely between -20°C and 60°C. Avoid using it outside this range to prevent damage.

• Q: Can I use this battery in parallel with another LiPo battery?
  A: Yes, but ensure both batteries have the same voltage and capacity, and use a balancing circuit.

By following these guidelines, you can safely and effectively use the 리튬폴리머 TW501220 in your projects.