How to Use Battery Charger Protection Board: Examples, Pinouts, and Specs

The Battery Charger Protection Board (Manufacturer: Dollatek, Part ID: ELA20598) is a compact and efficient circuit board designed to safeguard rechargeable batteries during charging and discharging cycles. It provides protection against overcharging, over-discharging, and short circuits, ensuring the longevity and safety of the battery. This component is ideal for use in lithium-ion (Li-ion) and lithium-polymer (LiPo) battery packs.

• Power banks and portable chargers
• Electric vehicles and e-bikes
• Solar energy storage systems
• DIY electronics projects using rechargeable batteries
• Battery-powered tools and devices

The following table outlines the key technical details of the Dollatek ELA20598 Battery Charger Protection Board:

The board has a simple pin layout for easy integration into circuits. The table below describes each pin:

1. Connect the Battery Pack:

   • Attach the positive terminal of the battery pack to the B+ pin.
   • Attach the negative terminal of the battery pack to the B- pin.

2. Connect the Load or Charger:

   • For charging, connect the positive terminal of the charging source to the P+ pin and the negative terminal to the P- pin.
   • For powering a load, connect the load's positive terminal to P+ and the negative terminal to P-.

3. Verify Connections:

   • Double-check all connections to ensure proper polarity and avoid short circuits.

4. Power On:

   • Turn on the charging source or load. The protection board will automatically regulate the charging and discharging process.

• Battery Compatibility: Ensure the board is compatible with the type and voltage of your battery pack. This board is designed for lithium-ion and lithium-polymer batteries.
• Current Limits: Do not exceed the maximum charging or discharging current of 3A to prevent damage to the board or battery.
• Heat Management: Avoid operating the board in environments exceeding the specified temperature range (-20°C to 60°C).
• Polarity: Always connect the battery and load with the correct polarity to prevent damage to the board.

The Battery Charger Protection Board can be used to power an Arduino UNO from a rechargeable battery. Below is an example of how to connect the board and a simple Arduino sketch to monitor battery voltage:

1. Connect the battery pack to the B+ and B- pins of the protection board.
2. Connect the P+ and P- pins to the Arduino's VIN and GND pins, respectively.

// Simple Arduino sketch to monitor battery voltage
// Connect the battery's positive terminal to an analog pin (e.g., A0)

const int batteryPin = A0;  // Analog pin connected to battery
const float voltageDividerRatio = 2.0;  // Adjust based on your resistor divider
const float referenceVoltage = 5.0;  // Arduino's reference voltage (5V for UNO)

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
}

Note: Use a voltage divider circuit if the battery voltage exceeds the Arduino's analog input range (0-5V).

1. Board Overheating:

   • Cause: Exceeding the maximum current rating.
   • Solution: Reduce the load or charging current to within the 3A limit.

2. Battery Not Charging:

   • Cause: Incorrect wiring or damaged battery.
   • Solution: Verify all connections and ensure the battery is functional.

3. Short Circuit Protection Triggered:

   • Cause: Accidental short circuit in the load or battery connections.
   • Solution: Disconnect the board, fix the short circuit, and reconnect.

4. Voltage Readings Are Inaccurate:

   • Cause: Incorrect resistor values in the voltage divider circuit.
   • Solution: Recalculate and use appropriate resistor values for the voltage divider.

• Q: Can this board be used with NiMH or lead-acid batteries?
  A: No, this board is specifically designed for lithium-ion and lithium-polymer batteries.

• Q: What happens if the battery voltage drops below 2.5V?
  A: The board will disconnect the load to prevent over-discharging and protect the battery.

• Q: Can I use this board for a 3-cell (3S) battery pack?
  A: No, this board is designed for single-cell (1S) battery packs. For multi-cell packs, use a protection board designed for the specific configuration.

By following this documentation, you can safely and effectively use the Dollatek ELA20598 Battery Charger Protection Board in your projects.