How to Use 12.8V 30000mAh 3C 4S5P LiFePO4 Battery Pack: Examples, Pinouts, and Specs

The 12.8V 30000mAh 3C 4S5P LiFePO4 Battery Pack (Manufacturer Part ID: IFR 32650) by Pro-Range is a high-performance rechargeable lithium iron phosphate (LiFePO4) battery pack. It features a nominal voltage of 12.8V, a capacity of 30,000mAh, and a discharge rate of 3C. The pack is constructed using 4 cells in series (4S) and 5 cells in parallel (5P), ensuring high energy density, long cycle life, and enhanced safety.

• Solar energy storage systems
• Uninterruptible Power Supplies (UPS)
• Electric vehicles (EVs) and e-bikes
• Portable power stations
• Robotics and industrial equipment
• Marine and RV power systems

The battery pack typically includes a Battery Management System (BMS) with the following connections:

Note: The exact pinout may vary depending on the specific BMS used in the battery pack. Refer to the manufacturer's datasheet for detailed wiring diagrams.

1. Connection to Load:

   • Connect the positive terminal of the battery pack to the positive input of your load.
   • Connect the negative terminal of the battery pack to the negative input of your load.
   • Ensure the load does not exceed the maximum continuous discharge current (90A).

2. Charging the Battery:

   • Use a LiFePO4-compatible charger with a maximum charge voltage of 14.6V.
   • Ensure the charger’s current rating does not exceed the recommended charge current (typically 0.5C or 15A for this pack).

3. Battery Management System (BMS):

   • The integrated BMS protects the battery from overcharge, over-discharge, overcurrent, and short circuits.
   • Ensure all balance leads are properly connected if using an external BMS.

4. Wiring Example: Below is a simple wiring example for connecting the battery pack to a load and charger:

   +-------------------+       +-------------------+
   |   LiFePO4 Pack    |       |      Load         |
   |   +         -     |-------|   +         -     |
   +-------------------+       +-------------------+
            |                          |
            |                          |
            +--------------------------+
                     Charger
   

• Avoid Overdischarge: Do not allow the battery voltage to drop below 10.0V to prevent damage.
• Use Proper Chargers: Always use a charger specifically designed for LiFePO4 batteries.
• Temperature Monitoring: Avoid charging or discharging the battery outside the recommended temperature range.
• Storage: Store the battery at 50% charge in a cool, dry place if not in use for extended periods.
• Safety Precautions: Do not puncture, crush, or expose the battery to fire or water.

If you are using this battery pack to power an Arduino UNO, ensure the voltage is regulated to 5V using a DC-DC step-down converter. Below is an example of Arduino code to monitor the battery voltage using an analog input:

// Arduino code to monitor battery voltage
const int batteryPin = A0; // Analog pin connected to battery voltage divider
const float voltageDividerRatio = 5.7; // Adjust based on resistor values
const float referenceVoltage = 5.0; // Arduino reference voltage (5V)

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

void loop() {
  int rawValue = analogRead(batteryPin); // Read 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 1 second before next reading
}

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

1. Can I connect multiple packs in series or parallel?

   • Yes, but ensure the BMS supports such configurations and balance the packs before connecting.

2. How do I know when the battery is fully charged?

   • The charger will typically indicate full charge when the voltage reaches 14.6V and the current drops to near zero.

3. What is the expected lifespan of this battery pack?

   • The pack can last over 2000 cycles at 80% Depth of Discharge (DOD) under proper usage conditions.

4. Can I use this battery pack for starting a car engine?

   • No, this pack is not designed for high instantaneous current required for engine cranking.

By following the guidelines and best practices outlined in this documentation, you can ensure safe and efficient use of the 12.8V 30000mAh 3C 4S5P LiFePO4 Battery Pack.