1. Introduction
This manual provides essential instructions for the safe and effective installation, operation, and maintenance of your DALY Smart BMS Li-ion 20S 72V 200A Battery Management System. Please read this manual thoroughly before use to ensure proper functionality and to prevent damage to the device or battery pack.
2. Product Overview
The DALY Smart BMS is designed to manage and protect Li-ion battery packs with 20 series cells and a nominal voltage of 72V, supporting a continuous discharge current of 200A. It integrates advanced protection features and communication capabilities.
Image: Front view of the DALY Smart BMS, showcasing its robust red heat sink design and connection points.
Key Features:
- Overcurrent, Overcharge, Overdischarge, Short circuit, and Temperature protection.
- Double protection with injection patent technology and patent shell for waterproof, dustproof, shockproof, and anti-static properties.
- Smart monitoring via Bluetooth app or PC software for real-time battery status and parameter modification.
- High acquisition accuracy with quality components.
Package Contents:
Image: The DALY Smart BMS package includes the BMS unit, Bluetooth module, NTC temperature sensor, sampling cable, and UART cable.
- 3.7V Li-ion BMS (1 unit)
- Bluetooth Module (1 unit)
- NTC Temperature Sensor (1 unit)
- Sampling Cable (1 unit)
- UART Cable (1 unit)
- Instruction Manual (1 unit)
3. Safety Information
Always prioritize safety when working with battery management systems and high-voltage battery packs. Improper installation or handling can lead to serious injury, fire, or damage to equipment.
- Professional Installation Recommended: Installation should be performed by qualified personnel with experience in battery systems.
- Insulated Tools: Use only insulated tools to prevent short circuits.
- Voltage Verification: Always verify voltage levels with a multimeter before making any connections.
- Correct Polarity: Ensure all connections are made with correct polarity. Reversing polarity can cause severe damage.
- Ventilation: Ensure adequate ventilation when working with battery packs.
- Emergency Procedures: Be aware of emergency procedures for battery fires or electrical shocks.
4. Setup and Installation
Careful adherence to the wiring diagram and instructions is crucial for the correct operation of the BMS.
Wiring Diagram:
Image: Detailed wiring diagram for connecting the DALY Smart BMS to a battery pack, motor/load, and charger, including balance wire connections.
Installation Steps:
- Prepare Wires: Use appropriate tools (soldering machine, scissors, double-sided tape, tin wire, multimeter) for preparing connections.
- Disconnect Balance Wires: IMPORTANT: Before connecting the BMS, disconnect all balance wires. Connect the BMS connection port after connecting the black and red balance wires on the battery pack.
- Ensure Cooling: Keep the BMS red cooling surface side uncovered to allow for proper heat dissipation.
- Use Matching Wires: Use DALY matching balance wires (regular length 450 mm / 17.72 inches).
- Connect Balance Wires: After confirming that the balance wires are correctly welded and installed, connect the balance wires and the BMS connection port.
- Connect Communication Modules: Attach communication accessories such as UART, Bluetooth, RS485, or CAN as needed.
- Initial Activation: Press the activation button on the battery board or charge the battery to activate the BMS for the first time.
For detailed video tutorials on connections, please visit the DALY website: www.dalyelec.cn/newsshow.php?cid=25&id=78&lang=1
5. Operating Instructions
The DALY Smart BMS offers various communication interfaces for monitoring and configuration.
Communication Interfaces:
Image: Diagram illustrating the various communication interfaces available on the DALY Smart BMS, including RS485, CAN, UART, and Bluetooth, and their connection to external devices like computers or mobile phones.
- Bluetooth (BT): Connect to the DALY Smart BMS app on your smartphone.
- UART: Universal Asynchronous Receiver-Transmitter for serial communication, typically with a PC.
- RS485: Industrial standard for serial communication over long distances, often used with PC software.
- CAN: Controller Area Network, a robust vehicle bus standard for communication.
Using the Bluetooth APP:
Image: Screenshot of the DALY Smart BMS Bluetooth application interface, showing battery status, voltage, current, and fault alarms.
The Bluetooth app allows you to check battery status and modify parameters. The initial password for the Smart Board APP to change parameters is 123456.
The serial number of the BMS and the protection parameters (Li-ion, LiFePO4) have default values from the factory. The capacity of the battery pack needs to be set according to the actual capacity (AH) of the battery pack. If the capacity AH is not set correctly, the percentage of remaining power will be inaccurate. Other parameters can also be set to your needs.
6. Maintenance
Proper maintenance ensures the longevity and reliable performance of your DALY Smart BMS.
- Keep Clean: Regularly inspect the BMS for dust or debris and clean gently if necessary.
- Ensure Airflow: Always ensure the red cooling surface of the BMS is uncovered and has adequate airflow to prevent overheating.
- Connection Checks: Periodically check all wiring connections for tightness and signs of corrosion.
- Software Updates: Keep the Bluetooth app and PC software updated to the latest versions for optimal performance and bug fixes.
7. Troubleshooting
If you encounter issues with your DALY Smart BMS, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| BMS not activating / No power output | Ensure the activation button has been pressed or the battery pack has received an initial charge. Check all main power connections and balance wire connections. |
| Overcurrent/Overcharge/Overdischarge Protection Triggered | Reduce load, check charger output, or verify battery cell voltages. The BMS is functioning to protect the battery. Review configured parameters in the app/software. |
| Temperature Protection Triggered | Ensure adequate cooling for the BMS and battery pack. Check NTC sensor connection and placement. |
| Bluetooth App Connectivity Issues | Ensure Bluetooth is enabled on your device. Check that the BMS is powered on. Try restarting the app or updating it to the latest version. Some devices may require location services to be enabled for Bluetooth scanning. |
| Inaccurate State of Charge (SOC) Reading | Verify that the battery pack's actual capacity (AH) is correctly set in the BMS parameters via the app or PC software. |
| "Collection Chip Error" or similar cell voltage reading issues | This often indicates an issue with the balance wire connections or the internal cell monitoring circuitry. Carefully re-check all balance wire connections for proper seating and continuity. If the issue persists, contact technical support. |
If troubleshooting steps do not resolve the issue, please contact DALY customer service for further assistance.
8. Specifications
Image: Table detailing the technical specifications of the DALY Smart BMS, including current ratings, voltage thresholds, and physical dimensions.
| Parameter | Value |
|---|---|
| Product Type | Li-ion 20S 200A common port with balance |
| Communication Interfaces | UART/RS485/CAN/Bluetooth |
| Discharge Current | 200A |
| Over-discharge Current | 300A |
| Charge Current | 100A |
| Overcharge Voltage | 4.25V ± 0.05V (any string) |
| Over-discharge Voltage | 2.7V ± 0.05V (any string) |
| Charge Voltage | S*4.2V (where S is number of series cells) |
| Dimensions (L x W x H) | 130 x 221 x 32 mm (5.12 x 8.7 x 1.26 inches) |
| Output Wire | 2AWG / 200mm |
| Balance Wires | 22AWG / 600mm |
| Item Weight | 4.1 pounds |
9. Warranty and Support
DALY is committed to providing reliable products and customer satisfaction.
- Technical Support: We offer 24-hour one-on-one customer service and lifetime technical support.
- Quality Assurance: This product is ISO/FCC/RoHS/PSE/CE APPROVED, ensuring adherence to international quality and safety standards.
- Contact: For any inquiries, technical assistance, or if you require a customized BMS or bulk order, please contact DALY customer service.
