DALY Smart BMS LiFePo4 24V 40A 8S Instruction Manual

1. Introduction

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your DALY Smart BMS LiFePo4 24V 40A 8S. This Battery Management System is designed to optimize the performance and extend the lifespan of 3.2V Lithium Iron Phosphate (LiFePo4) batteries, offering comprehensive protection features.

2. What's in the Box

Upon unpacking, please verify that all components listed below are present:

• 3.2V LiFePo4 BMS (1 unit)
• Bluetooth Module (1 unit)
• NTC Sensor (1 unit)
• Sampling Cable (1 unit)
• UART Cable (1 unit)
• Instruction Manual (1 unit)

3. Specifications

4. Setup and Installation

4.1. Preparation of Materials and Tools

Before beginning the wiring process, ensure you have the following tools and materials:

• DALY BMS unit
• Balance wires (sampling cable)
• Ceramic scissors (insulated, for cutting wires)
• Detection board (for verifying wiring)
• Multimeter (for monitoring voltages)
• Soldering iron and solder (recommended temperature: 420°C; for novices: 350°C)
• Battery pack (e.g., 10-string ternary battery or 10-string LiFePo4 battery)

4.2. Sampling Point Determination

Accurate identification of sampling points on your battery pack is crucial for correct BMS operation. The sampling points correspond to the positive and negative terminals of each cell in the series.

• The first sampling point (B-) is the total negative electrode of the battery pack.
• Subsequent sampling points (B1, B2, B3, etc.) are the connection points between the negative electrode of one cell and the positive electrode of the adjacent cell in series.
• The last sampling point (B+) is the total positive electrode of the battery pack.

Important: Before connecting the BMS, verify each cell's voltage. Use a multimeter to measure the voltage between consecutive sampling points. Each measurement should correspond to the voltage of a single cell (e.g., ~3.2V for LiFePo4). The total voltage across B- and B+ should be the sum of all cell voltages.

Video: Daly BMS Sampling Point Determination

This video demonstrates how to correctly identify and verify the sampling points on a battery pack using a multimeter, ensuring proper connection to the BMS.

Video: Test Battery Voltage Before Connecting with Daly BMS

This video guides you through the process of testing individual cell voltages and total battery pack voltage before connecting the BMS, a critical step to prevent damage.

4.3. Wiring Steps

Follow these steps carefully to wire your DALY Smart BMS:

1. Prepare the Battery Pack: Ensure your battery cells are securely assembled. Apply double-sided adhesive to fix the balance wires along the battery pack for neatness and security.
2. Connect B- (Total Negative): Connect the black wire of the sampling cable (B0) to the total negative terminal of your battery pack.
3. Connect B1, B2, B3... (Cell Connections): Connect the red wires of the sampling cable sequentially to the positive terminals of each cell, starting from B1 (the positive terminal of the first cell, adjacent to B-). Ensure each wire is connected to its corresponding cell's positive terminal.
4. Connect B+ (Total Positive): The last red wire of the sampling cable should connect to the total positive terminal of the battery pack.
5. Solder Connections: Carefully solder each balance wire to its designated sampling point. Use appropriate soldering techniques and ensure strong, clean connections.
6. Verify Wiring: After soldering, use the detection board or a multimeter to re-verify all connections and voltages. Ensure all indicator lights on the detection board are on, or that multimeter readings are correct and increasing incrementally.
7. Connect BMS: DO NOT insert the balance cable into the BMS unit until all wiring is complete and verified. Once verified, carefully plug the balance cable into the designated port on the BMS.

Video: Prepare Materials Before Daly BMS Wiring

This video outlines the necessary tools and materials for DALY BMS wiring, including the BMS, cables, multimeter, and soldering equipment.

Video: Daly BMS Wires Welding Video

This video provides a step-by-step guide on how to properly weld the balance wires to the battery pack, ensuring secure and reliable connections.

5. Operation

5.1. Smart BMS Features

The DALY Smart BMS offers advanced monitoring and parameter modification capabilities:

• Bluetooth App: Connect your smartphone via the included Bluetooth module to check battery status and modify parameters in real-time. The app supports both Android and iOS systems.
• PC Software: Utilize the UART, RS485, or CAN communication interfaces to connect the BMS to a PC. The PC software allows for detailed monitoring and configuration of battery parameters.

5.2. Initial Activation and Parameter Settings

The BMS may require initial activation and parameter setup:

• Activation: The BMS can be activated by charging the battery for the first time.
• Default Values: The serial number of the BMS and protection parameters (Li-ion, LiFePo4) have default values from the factory.
• Capacity Setting: The battery capacity (AH) of the battery pack needs to be set according to the actual capacity. If the capacity is not set correctly, the percentage of remaining power will be inaccurate.
• Initial Password: The initial password for the Smart Board APP to change parameters is: 123456.

6. Maintenance

The DALY Smart BMS is designed for durability and protection. To ensure its longevity and optimal performance:

• The BMS features double protection with injection patent technology and a patent shell, making it waterproof, dustproof, shockproof, and anti-static.
• Regularly inspect all connections for tightness and corrosion.
• Keep the BMS clean and free from debris.
• Ensure adequate ventilation around the BMS to prevent overheating.

7. Troubleshooting

If you encounter any issues with your DALY Smart BMS, please refer to the following general advice:

• Wiring Errors: If the BMS is not functioning as expected, re-check all wiring connections against the provided diagram and ensure all sampling points are correctly identified and connected. Use a multimeter to verify voltages.
• App/Software Connectivity: Ensure your Bluetooth module is properly connected and powered. For PC connections, verify the UART/RS485/CAN cables are correctly installed and drivers are up to date.
• Protection Triggers: The BMS includes overcurrent, overcharge, overdischarge, short circuit, and temperature protection. If the system shuts down, identify the triggered protection event via the app/software and address the underlying cause.
• Contact Support: For complex issues or if you require active balancers, parallel modules, or other accessories, please contact DALY's online customer service. They offer 24-hour one-on-one customer service and lifetime technical support.

8. Applications

The DALY Smart BMS is suitable for a wide range of applications, including:

• Electric Scooters
• E-Bikes
• AGV Forklifts
• Electric Tricycles
• Low Speed EV
• Photovoltaic Energy Storage
• RV & Home Energy Storage
• Emergency UPS
• Solar Street Lights

9. Warranty and Support

DALY BMS products are designed with high-quality components and undergo rigorous testing to ensure reliability. The product is ISO/FCC/RoHS/PSE/CE APPROVED.

For any technical assistance, questions regarding active balancers, parallel modules, or other accessories, please contact DALY's online customer service. We provide 24-hour one-on-one customer service and lifetime technical support to ensure your satisfaction.