1. Introduction
The DALY Smart Active Balance Battery Management System (BMS) is an advanced solution designed to manage and protect various lithium battery packs, including Li-ion, LiFePO4, and LTO chemistries. This BMS features active balancing, comprehensive protection functions, and multi-channel communication capabilities for efficient and safe battery operation. It supports a wide range of cell configurations from 4S to 24S and continuous currents from 40A to 500A.
2. Packing List
Please check the contents of your package against the list below:
- Smart Active Balance BMS Unit
- P-&B- Cable (Standard: 10AWG for 40-60A, 7AWG for 80-100A, 4AWG*1 for 150-200A, 2AWG*1 for 250A, 4AWG*2 for 300A, 1AWG*2 for 400-500A. Optional: 7AWG*1 for 40-60A, 6AWG*1 for 80-100A, 2AWG*1 for 150-200A)
- Screws (2 Pcs)
- Sampling Cable (Standard: 450mm, Optional: 800mm)
- B+ Cable
- NTC (One standard, two optional)
- User Manual
- Packaging Box
- RS485/CAN Port Cable (Standard package only for BT RS485 CAN version BMS)
- WIFI Module (Standard package only for BT WIFI version BMS)
3. Setup and Installation
3.1. Wiring Diagram
Proper wiring is crucial for the safe and effective operation of your DALY BMS. Refer to the diagram below for connecting the BMS to your battery pack and communication modules.
Key Connections:
- B- and B+ Terminals: Connect the main negative and positive terminals of your battery pack to the corresponding B- and B+ terminals on the BMS.
- Balance Wires: Connect the individual cell voltage sensing wires from your battery pack to the balance port on the BMS. Ensure correct order and polarity.
- Communication Ports:
- UART: For PC Host communication.
- RS485: For PC Host communication.
- CAN: For PC Host communication.
- WIFI Module: Connect for mobile APP and IoT Cloud management.
- GPS Module: For location tracking (if applicable).
- Key Switch: For external control.
- Buzzer: For audible alerts.
- Heating Module: For temperature management.
- DIO: Digital Input/Output.
- NTC1/NTC2: Temperature sensors. NTC-1 is standard; NTC-2 needs to be customized.
3.2. WIFI Wireless & Remote Monitoring
The DALY BMS supports WIFI connectivity for remote monitoring and management via a mobile application and cloud platform. This allows you to monitor your lithium battery without distance limitations.
Connection Steps:
- Connect the WIFI Module to the designated port on the BMS.
- Ensure your router is powered on and configured for internet access.
- The BMS with the WIFI module will connect to the Cloud Server via your router.
- Download and install the 'Balance BMS' mobile application on your smartphone.
- Access the Cloud Manager at databms.com for PC-based monitoring.
- Follow the app/cloud platform instructions to register your device and begin monitoring.
4. Operating Instructions
4.1. Active Balancing
The DALY Smart Active Balance BMS features a continuous 1A active balancing current, ensuring that all cells in your battery pack maintain a consistent voltage level. This significantly improves battery life and performance by preventing overcharging or over-discharging of individual cells.
4.2. Communication and Monitoring
The BMS offers multiple communication interfaces for comprehensive monitoring and control:
- Bluetooth (BT): Built-in for local monitoring via mobile app.
- WIFI: For remote monitoring via mobile app and IoT Cloud platform (databms.com).
- RS485 & CAN: For PC host communication, allowing detailed data logging and parameter configuration.
- Mobile APP (Balance BMS): Provides real-time data, status alerts, and configuration options.
- IoT Cloud Management: Centralized platform for managing multiple BMS units, viewing historical data, and performing remote diagnostics.
4.3. Protection Functions
The DALY BMS provides comprehensive protection for your battery pack:
Basic Protection Functions:
- Overcharge Protection
- Over-discharge Protection
- Overcurrent Protection
- Short Circuit Protection
- Temperature Protection
Extra Protection Features:
- Pre-charge Protection: Prevents high inrush currents when connecting to a load with capacitance.
- Misconnection Protection: Safeguards against incorrect wiring of balance leads.
- All-in Protection: Comprehensive protection for all aspects of battery operation.
- Parallel Protection: Ensures safe operation when multiple battery packs with BMS are connected in parallel.
5. Maintenance
To ensure the longevity and optimal performance of your DALY Smart Active Balance BMS and battery pack, follow these maintenance guidelines:
- Regular Inspection: Periodically check all wiring connections for tightness and signs of corrosion or damage.
- Cleanliness: Keep the BMS unit clean and free from dust, dirt, and moisture. Use a dry, soft cloth for cleaning.
- Temperature Management: Ensure the BMS operates within its specified temperature range. Adequate ventilation is important, especially for higher current models with cooling fans.
- Firmware Updates: Check the DALY website or app for available firmware updates. Keeping the firmware updated can improve performance and add new features.
- Avoid Physical Damage: Protect the BMS from impacts, vibrations, and extreme environmental conditions.
6. Troubleshooting
If you encounter issues with your DALY BMS, refer to the following common troubleshooting steps:
- No Power/No Indication:
- Check all main power connections (B- and B+).
- Verify the battery pack voltage is within the BMS's operating range.
- Ensure the balance wires are correctly connected and not loose.
- Balancing Not Occurring:
- Confirm that the cell voltages are indeed unbalanced (check via app/PC software).
- Ensure the BMS is powered on and functioning.
- Check for any error codes or warnings in the monitoring software.
- Communication Issues (Bluetooth/WIFI/RS485/CAN):
- Bluetooth: Ensure the BMS is within range of your device and Bluetooth is enabled.
- WIFI: Verify the WIFI module is correctly installed and connected to a stable network. Check router settings.
- RS485/CAN: Ensure cables are securely connected and drivers are installed on the PC. Verify communication settings in the software.
- Over-protection Triggered (Overcharge, Over-discharge, Overcurrent, Temperature):
- Overcharge/Over-discharge: Check individual cell voltages. Adjust charging/discharging parameters if necessary.
- Overcurrent: Reduce the load or check for short circuits in the system. Ensure the BMS current rating matches your application.
- Temperature: Ensure adequate cooling for the BMS and battery. Check NTC sensor connections.
- Error Codes: Refer to the DALY BMS software manual for specific error code interpretations and solutions.
7. Specifications
The DALY Smart Active Balance BMS is available in various configurations. Below are general specifications and a comparison table.
7.1. General Product Specifications
| Attribute | Value |
|---|---|
| Brand Name | DALY |
| Model Number | DALY BMS 500A/400A/300A/250A/200A/150A/100A/80A/60A/40A |
| Accessory Type | Battery Accessories |
| Origin | Mainland China |
| Certification | CE, RoHS |
| Equalizing Current | 1A |
| Communication Ports | UART, RS485, CAN |
| BT APP Supported Languages | Chinese, English, French, German, Spanish, Russian, Norwegian |
| Support APP Communication | Built-in Bluetooth, WIFI |
| Charger Included | N (No) |
| Battery Included | No |
| High-concerned Chemical | None |
7.2. Product Dimensions and Current Ratings
| Sustained Current | Strings | Size (mm) | Weight (g) |
|---|---|---|---|
| 40A/60A | 4-24S | 125*66*15.8 | 177 |
| 80A/100A | 4-24S | 167*65*15 | 210 |
| 150A | 4-24S | 176*66*16 | 275 |
| 200A | 4-24S | 176*66*21 | 275 |
| 250A-500A | 4-24S | 195*109*26 | 660 |
*Data tolerance range ±0.5mm.
7.3. Comparison with Existing BMS
8. User Tips
- Verify Cell Count: Always double-check that the BMS is configured for the correct number of series cells (S-count) in your battery pack before connecting. Incorrect configuration can lead to damage.
- Secure Connections: Ensure all balance wires and main power cables are securely fastened to prevent intermittent connections or arcing.
- Monitor Regularly: Utilize the mobile app or PC software to regularly monitor cell voltages, temperatures, and overall battery health. This helps in early detection of potential issues.
- Understand Protection Limits: Be aware of the overcurrent, overcharge, and over-discharge limits of your specific BMS model to avoid triggering protection unnecessarily or damaging the battery.
- Environmental Considerations: Install the BMS in a location that provides adequate ventilation and protection from extreme temperatures and moisture.
9. Frequently Asked Questions (FAQ)
- Q: What is active balancing and why is it important?
- A: Active balancing is a process where energy is transferred from higher voltage cells to lower voltage cells within a battery pack. This ensures all cells maintain a similar voltage, which is crucial for maximizing battery capacity, extending lifespan, and preventing damage from overcharge or over-discharge of individual cells.
- Q: How do I connect the communication modules (WIFI, RS485, CAN)?
- A: Refer to the 'Wiring Diagram' section (Figure 3) for detailed connection instructions. Each module typically connects to a specific port on the BMS. Ensure you use the correct cables and follow the polarity indicated.
- Q: Can I use this BMS for parallel battery packs?
- A: Yes, the DALY Smart Active Balance BMS includes 'Parallel Protection' features to ensure safe operation when multiple battery packs, each with its own BMS, are connected in parallel. Always ensure proper wiring and configuration for parallel systems.
- Q: What should I do if the BMS shows an error or fault?
- A: First, check the monitoring app or PC software for specific error codes. These codes often provide clues about the nature of the problem. Common issues can be resolved by checking connections, battery cell voltages, and operating conditions. If the issue persists, consult the detailed troubleshooting guide in the software or contact technical support.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official DALY BMS website or contact your authorized dealer. Ensure you have your product model and serial number available when seeking support.
