1. Product Overview
The DALY BMS (Battery Management System) 16S 48V 250A LiFePO4 Smart Protection Board is designed to manage and protect 16-series 48V Lithium Iron Phosphate (LiFePO4) battery packs. It provides essential safety features and monitoring capabilities for various applications, including golf carts, home energy storage systems, and marine batteries.
Image 1.1: DALY BMS 16S 48V 250A Smart Protection Board with accessories and app interface.
2. Key Features
- Enhanced Battery Safety: Provides protection against overcharging, over-discharging, overcurrent, short circuits, and extreme temperatures, ensuring battery pack safety and longevity.
- 2-in-1 Bluetooth/Wi-Fi Dongle: Enables easy connection to a mobile application via Bluetooth for local monitoring or Wi-Fi for remote control and monitoring when Bluetooth is out of range (requires connection to a Wi-Fi router). Parameters can be adjusted via the mobile app or PC software.
- Strong Overcurrent Capability: Utilizes high-performance MOSFETs and high-power TVS in hardware to absorb surge voltage and control regenerative current, protecting the BMS and batteries. Software features optimized absorption and release logic to prevent power-off issues from regenerative current, particularly beneficial for applications like golf carts.
- Multiple Interface Functions: Supports dual UART communication and is compatible with BT&WIFI modules and touch displays. Includes a Bluetooth activation-free function, allowing BMS wake-up directly from the APP.
- Broad Application: Suitable for RV energy storage, forklifts, golf carts, large sightseeing cars, low-speed scooters, ATVs, and industrial AGVs.
Image 2.1: Visual representation of key features including smart solutions, waterproofing, parallel connection support, high current resistance, compact size, and efficient thermal management.
Image 2.2: Examples of high-current applications for the DALY BMS.
3. Package Contents
Verify that all items listed below are included in your package. If any items are missing or damaged, please contact customer support.
| Item | Description | Quantity |
|---|---|---|
| 16S 48V 250A Smart BMS | Main Battery Management System unit | 1 |
| B-P- Output Line | Battery output connection cable | 1 |
| 2-in-1 BT or WiFi Dongle | Bluetooth and Wi-Fi communication module | 1 |
| Sampling Cable | Balance wire harness for cell voltage monitoring | 1 |
| NTC Temperature Sensor | Negative Temperature Coefficient sensor | 1 |
| CAN/485 5-pin Cable | Communication cable for CAN bus or RS485 | 1 |
| User Manual | This instruction guide | 1 |
Image 3.1: Contents of the DALY BMS package.
4. Installation and Wiring
Proper installation and wiring are crucial for the safe and effective operation of the BMS. Follow these steps carefully:
- Step 1: Solder Sampling Cables. Connect the sampling cables to your battery pack. The first black cable in the sampling set connects to the negative terminal of the battery. The second cable (red) connects to the positive terminal of the first string of batteries, and subsequent red cables connect to the positive terminals of the remaining battery strings, in sequence, until all cables are connected.
- Step 2: Check the Cables. After connecting the sampling cables, measure the voltage between two adjacent cables starting from the header. Ensure there are no wrong connections or missing connections.
- Step 3: Connect Output Wires. Connect the B- wire of the BMS to the total negative terminal of the battery pack. Then, plug the sampling cable to the BMS. After activating the BMS, verify that the voltage (battery voltage) between B+ and B- and the voltage between P+ and P- are consistent.
Image 4.1: Detailed wiring diagram for the DALY BMS.
Important Safety Note: Incorrect wiring can damage the BMS, battery pack, and connected equipment. If you are unsure about any step, consult a qualified technician.
5. Operation and Monitoring
The DALY BMS features a smart application for monitoring and managing your battery pack. The 2-in-1 Bluetooth/Wi-Fi dongle allows flexible connectivity.
5.1 Mobile App Connectivity
Connect the 2-in-1 dongle to the BMS. You can then connect to the mobile app via Bluetooth for local monitoring. For remote monitoring, connect the dongle to a Wi-Fi router, and then access the battery status and adjust parameters from anywhere via the app.
Image 5.1: DALY BMS mobile application interface.
5.2 PC Software and Cloud Monitoring
The BMS also supports monitoring via PC software and a cloud-based IoT platform. This allows for comprehensive data logging and analysis.
Video 5.1: An overview of the DALY S-series Smart BMS features, including connectivity options and smart monitoring capabilities.
6. Specifications
Detailed technical specifications for the DALY BMS 16S 48V 250A LiFePO4 Smart Protection Board:
| Parameter | Value |
|---|---|
| Product Type | LiFePO4 16S 250A common port with balance |
| Discharge Current | 250A |
| Overdischarge Current | 375±3A |
| Charging Current | 250A |
| Overcharge Current | 375±3A |
| Overcharge Voltage | 3.75V±0.05V (Can be set) |
| Overdischarge Voltage | 2.2V±0.05V (Can be set) |
| Charge Voltage | 58.4V |
| Model | R24S (11~24S) |
| Dimensions (L x W x H) | 183 x 108 x 26 mm (7.2 x 4.25 x 1.02 inches) |
| Output Wire | 2AWG/200mm |
| Cable | 24AWG/450mm |
| Weight | 600~700g (1.32~1.54 lbs) |
| Operating Temperature | Charging: -35 to 75°C; Discharging: -35 to 75°C |
| Storage Temperature | -40 to 85°C |
Image 6.1: DALY BMS dimensions and detailed specifications.
7. Safety Information
The DALY BMS is designed with multiple protection features to ensure the safety of your battery system. These include:
- Overcharge Protection
- Over-discharge Protection
- Overcurrent Protection
- Short Circuit Protection
- Temperature Protection
- Cell Balancing (Passive Equalization)
Always adhere to proper battery handling and wiring procedures. Do not attempt to modify the BMS or use it outside its specified parameters.
8. Troubleshooting
If you encounter issues with your DALY BMS, consider the following general troubleshooting steps:
- No Power/No Communication: Check all wiring connections for proper seating and continuity. Ensure the battery pack is adequately charged. Verify the communication dongle is correctly inserted and powered.
- App Connectivity Issues: For Bluetooth, ensure the dongle is within range and not obstructed. For Wi-Fi, confirm the dongle is connected to a stable Wi-Fi network and the router has internet access. Try restarting the app or the BMS.
- Protection Triggered: If the BMS enters a protection state (e.g., overvoltage, undervoltage, overcurrent), identify the cause. This may require checking individual cell voltages, current draw, or temperature. Address the underlying issue before attempting to reset the BMS.
- Cell Imbalance: If cell voltages are significantly different, ensure the balancing function is enabled in the app (if applicable) and allow time for balancing to occur.
For persistent issues, refer to the detailed troubleshooting section in the full product manual or contact DALY customer support.
9. Warranty and Support
The DALY BMS 16S 48V 250A Smart Protection Board comes with a 3-year warranty. This warranty covers manufacturing defects and ensures reliable operation under normal use conditions.
For technical assistance, warranty claims, or further inquiries, please visit the official DALY store or contact their customer support channels. You can find more information and support resources by visiting the DALY Store on Amazon.
