1. Introduction
This manual provides essential information for the safe and efficient operation of your DALY Smart Battery Management System (BMS) for LiFePo4 8S 24V 40A batteries. The BMS is designed to protect your battery pack from various electrical anomalies and allows for monitoring and parameter adjustment via Bluetooth-enabled mobile applications or PC software.
2. Product Features
- Common Port Design: Supports both charging and discharging through the same port.
- High Current Capability: Supports up to 40A continuous discharge and 20A charge current.
- Programmable Protections:
- Over-charge protection
- Over-discharge protection
- Over-current protection (charge and discharge)
- Over-voltage protection
- Low temperature charging protection (down to -1°C)
- NTC temperature protection
- Short-circuit protection
- Smart Functions: Precise State of Charge (SOC) calculation with automatic learning, automatic charge battery function, and static balance function.
- Bluetooth Connectivity: Monitor battery status and adjust parameters wirelessly via Android or iOS mobile applications.
- PC Software Support: Manage and monitor the BMS via a PC interface using a UART cable.
3. Specifications
| Feature | Value |
|---|---|
| Product Dimensions | 5.04 x 2.6 x 0.71 inches |
| Item Weight | 12.8 ounces |
| Brand | DALY |
| Connectivity Technology | Bluetooth |
| Power Source | Battery Powered |
| Wireless Communication Standard | Bluetooth |
| Compatible Devices | Mobile Phones |
| Discharge Current | 40A (Continuous) |
| Charge Current | 20A (Continuous) |
| Over-discharge Current Protection | 60A ± 6A (Configurable) |
| Overcharge Current Protection | 60A ± 6A (Configurable) |
| Overcharge Voltage | 3.75V ± 0.05V (per string, Configurable) |
| Over-discharge Voltage | 2.2V ± 0.1V (per string, Configurable) |
| Charge Voltage | 29.2V (Configurable) |
4. Package Contents
Upon receiving your DALY Smart BMS, please verify that all components are included:
- SMART BMS Unit (1)
- Balance Wires (1 set)
- Bluetooth Module (1)
- UART Cable (for PC connection) (1)
- English Version Wiring Manual (1)
5. Safety Information
WARNING: Improper installation or use of a BMS can lead to serious injury, fire, or damage to property. Always exercise caution when working with high-voltage battery systems.
- Ensure all connections are correct and secure before applying power.
- Always disconnect the power source before performing any maintenance or wiring changes.
- Wear appropriate personal protective equipment (PPE), including insulated gloves and eye protection.
- Do not short-circuit the battery terminals or BMS connections.
- Operate the BMS within its specified voltage and current limits.
- Keep the BMS away from water, moisture, and extreme temperatures.
- If you are unsure about any step, consult a qualified professional.
6. Setup
6.1. Wiring Diagram
Carefully follow the wiring diagram provided. Ensure that the balance wires are connected to the correct cell terminals in sequence, starting from the negative terminal of the first cell (B-) to the positive terminal of the last cell (B+).
6.2. Initial Activation and Connection
- Verify Wiring: Before connecting the BMS, measure the voltage between adjacent balance cables to ensure the wiring is correct and matches the nominal voltage of a single string.
- Connect BMS: Plug in the NTC temperature sensor and the Bluetooth module to the BMS.
- Activate BMS: Press the button on the Bluetooth module to activate the smart BMS.
- Download App: Download the "Smart BMS" application from your mobile device's app store (Huawei or Apple App Store).
- Connect via Bluetooth: Open the Smart BMS APP and connect to the corresponding Bluetooth device ID.
- Initial Parameter Setup: For the first power-on, the battery capacity must be set to the actual capacity of your battery pack. The initial password for parameter settings is 123456. Adjust other parameters as needed under the guidance of your battery manufacturer.
7. Operation
Once the BMS is properly installed and configured, you can monitor its status and the battery pack's health using the Smart BMS mobile application or PC software.
- Real-time Monitoring: The app displays critical information such as total voltage, individual cell voltages, current, temperature, and State of Charge (SOC).
- Parameter Adjustment: Access the "Parameter Settings" section (password: 123456) to fine-tune protection thresholds for voltage, current, and temperature according to your battery specifications.
- Automatic Calibration: The battery is automatically calibrated when charged until the voltage reaches a high level 2 alarm.
8. Maintenance
Proper maintenance ensures the longevity and optimal performance of your battery pack and BMS.
- Regular Inspection: Periodically check all wiring connections for tightness and signs of corrosion or damage.
- Software Updates: Keep the Smart BMS mobile application and PC software updated to the latest version for improved features and bug fixes.
- Environmental Conditions: Ensure the BMS and battery pack are operated within recommended temperature and humidity ranges. Avoid direct sunlight or extreme cold.
- Cleaning: Keep the BMS unit clean and free from dust and debris. Use a dry, soft cloth for cleaning.
9. Troubleshooting
This section addresses common issues you might encounter with your DALY Smart BMS.
- BMS Not Activating: Ensure all balance wires are correctly connected and the main battery terminals (B- and P-) are properly wired. Press the activation button on the Bluetooth module.
- Bluetooth Connection Issues: Verify the Bluetooth module is securely plugged into the BMS. Ensure Bluetooth is enabled on your mobile device and the "Smart BMS" app has necessary permissions. Try restarting the app or your device.
- Incorrect Voltage Readings: Double-check all balance wire connections. Loose or incorrect connections can lead to inaccurate cell voltage readings.
- BMS Shuts Down Unexpectedly: This often indicates a protection trigger (e.g., over-current, over-voltage, under-voltage, or temperature). Check the alarm messages in the app for details. Address the underlying cause (e.g., reduce load, check charger, inspect battery cells).
- Balancing Issues: If cell voltages are consistently out of balance, ensure the balance wires are correctly installed. The BMS has a passive balancing function; for severely mismatched cells, external balancing might be required or cells may need replacement.
- App/PC Software Not Displaying Data: Confirm the Bluetooth module or UART cable is properly connected and the BMS is active. Ensure the app/software is the correct version and compatible with your BMS model.
For persistent issues not covered here, please refer to the detailed wiring manual included in your package or contact DALY customer support.
10. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your vendor. DALY provides technical support for their products. For assistance, please visit the official DALY website or contact their customer service department with your product model and purchase details.
