SJY LiFePO4 Lithium Iron Phosphate Battery Pack User Manual

1. Product Overview

The SJY LiFePO4 battery pack is a high-performance lithium iron phosphate battery designed for various applications including UPS, boats, golf carts, RVs, and solar inverter systems. These batteries utilize Grade A prismatic LiFePO4 cells, offering superior safety and a long cycle life compared to traditional Lipo or cylindrical cells.

Key Features:

• Grade A Prismatic Cells: Ensures high quality and performance.
• Long Lifespan: Over 6000 cycles, providing an estimated 8 years of life.
• Built-in 100A BMS: Provides comprehensive protection and supports upgrades.
• Removable Battery Case: Facilitates easy replacement or repair of cells.
• Compact Size: Designed for versatile application scenarios.
• Available with LCD Screen or Smart BMS (Bluetooth connectivity and Active Balancing).

2. Specifications

Battery Type Specifics:

3. Safety Information

⚠️ Please mind potential fire risk and strictly follow the instruction manual for charging and storage. For disposal, please check your local authority's website for more information and dispose of the lithium-ion battery safely in accordance with the applicable legal requirements.

BMS Protection Functions:

• Overvoltage and undervoltage protection
• Over-current charging protection
• Overheat charging protection
• Under-temperature charging protection
• Overheat discharge protection
• Under-temperature discharge protection

4. Setup & Installation

Connecting Batteries in Series/Parallel:

The SJY LiFePO4 battery packs support both series and parallel connections, depending on the model and desired voltage/capacity. Always ensure all individual batteries are fully charged before connecting them in series. For optimal balancing, connect them in parallel for 24 hours before series connection.

Connecting to a Solar Inverter:

The battery packs are designed for easy plug-and-play connection to a solar inverter using only two cables. No need to match specific inverter protocols.

Installation Video Guide:

Video 1: This video demonstrates the process of connecting four 12V 100Ah batteries in series to create a 48V 100Ah system, measuring individual and total voltage, and then connecting the battery bank to a solar inverter. It also shows how to select the battery type in the inverter settings.

1. Measure Individual Battery Voltage: Before connecting, use a multimeter to measure the voltage of each battery pack to ensure they are similar.
2. Connect Batteries in Series: Connect the batteries in series using appropriate cables. Ensure the wires are of consistent length in practice, even if the video shows different lengths for demonstration. Secure all connections tightly.
3. Test Total Voltage: After series connection, measure the total voltage of the battery bank to confirm it matches the expected combined voltage.
4. Connect to Inverter: Use the total positive and negative wires from the battery bank to connect to the designated terminals on the inverter.
5. Start Inverter and Select Battery Type: Power on the inverter and navigate through its settings to select the correct battery type (e.g., LiFePO4) for proper operation and charging.

5. Operation

Digital Display:

Depending on the model, your battery pack may feature either a Voltmeter or a Coulomb Meter for monitoring. Voltmeter models (e.g., 12V 200Ah, 24V 100Ah) provide voltage readings. Coulomb Meter models (e.g., 24V 200Ah, 48V 100Ah) offer more precise capacity and charge/discharge information.

Smart BMS (for 'BT' models):

Models with 'Smart BMS' (e.g., 24V 100AH-BT) include Bluetooth connectivity for remote monitoring and an Active Balance feature for enhanced cell longevity and performance.

6. Maintenance

Removable Battery Case:

All SJY battery models feature a removable battery case, making it easy to access and replace or repair individual prismatic cells if needed. This design enhances the serviceability and longevity of your battery pack.

BMS Upgrade Support:

The built-in 100A BMS supports future upgrades, ensuring your battery system can adapt to evolving technology and performance requirements.

Charging and Storage:

Always follow the recommended charging parameters and storage conditions to maximize battery life and ensure safety. Avoid extreme temperatures and ensure proper ventilation during charging.

7. Troubleshooting

If you encounter any issues with your SJY LiFePO4 battery pack, please refer to the following general troubleshooting steps:

• No Power Output: Check all cable connections for tightness and proper polarity. Verify the inverter settings are correctly configured for LiFePO4 batteries. Ensure the battery's voltage is within the operating range.
• Charging Issues: Confirm the charger is compatible with LiFePO4 batteries and is functioning correctly. Check for any error codes on the charger or inverter. Ensure the battery temperature is within the acceptable charging range.
• Unusual Behavior: If the battery or connected devices exhibit unusual behavior (e.g., excessive heat, strange odors), immediately disconnect the battery and consult a qualified technician.

For persistent problems, please contact SJY customer support for assistance.

8. Warranty & Support

SJY is a professional lithium battery manufacturer with 13 years of experience, specializing in digital, power, and energy storage batteries. Our products are backed by extensive experience and quality assurance.

Company Information:

• Experience: 13 years in lithium battery manufacturing.
• Certifications: Over 200 certifications.
• Staff: 500+ employees, including 30+ R&D personnel.
• Facilities: 10,000+ sqm factory buildings.