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. Refer to the manufacturer's datasheet for detailed wiring diagrams.

1. Charging the Battery Pack:

   • 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).
   • Connect the charger’s positive terminal to the battery’s positive terminal and the negative terminal to the battery’s negative terminal.

2. Connecting to a Load:

   • Connect the load’s positive terminal to the battery’s positive terminal and the load’s negative terminal to the battery’s negative terminal.
   • Ensure the load’s current draw does not exceed the continuous discharge rate of 90A.

3. Using with an Arduino UNO:

   • The battery pack can power an Arduino UNO via its VIN pin or an external voltage regulator.
   • Use a DC-DC step-down converter to reduce the 12.8V to 5V if powering the Arduino directly via the 5V pin.

   Example Arduino code to monitor battery voltage using an analog pin:

   // 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 used
   const float referenceVoltage = 5.0; // Arduino reference voltage (5V for UNO)
   
   void setup() {
     Serial.begin(9600); // Initialize serial communication
   }
   
   void loop() {
     int rawValue = analogRead(batteryPin); // Read analog value
     float batteryVoltage = (rawValue / 1023.0) * referenceVoltage * voltageDividerRatio;
     Serial.print("Battery Voltage: ");
     Serial.print(batteryVoltage);
     Serial.println(" V");
     delay(1000); // Wait 1 second before next reading
   }
   

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

• Safety First: Always handle the battery pack with care to avoid short circuits, overcharging, or deep discharging.
• BMS Protection: Ensure the built-in BMS is functioning correctly to protect against overvoltage, undervoltage, overcurrent, and thermal issues.
• Storage: Store the battery pack in a cool, dry place at a partial charge (40-60%) for long-term storage.
• Wiring: Use appropriately rated wires and connectors to handle the high current capacity of the battery pack.

1. Can I use this battery pack with solar panels?

   • Yes, but ensure the solar charge controller is compatible with LiFePO4 batteries and has a maximum charge voltage of 14.6V.

2. What happens if the battery is over-discharged?

   • The BMS should prevent over-discharge by cutting off the output. If the BMS fails, the battery may be damaged permanently.

3. How do I extend the battery’s lifespan?

   • Avoid deep discharges (below 10.0V), overcharging, and operating at extreme temperatures. Store the battery at 40-60% charge when not in use for extended periods.

4. Can I connect multiple battery packs in series or parallel?

   • Yes, but ensure the BMS supports such configurations and that all packs are balanced before connecting.

By following this documentation, users can safely and effectively utilize the 12.8V 30000mAh 3C 4S5P LiFePO4 Battery Pack for a wide range of applications.