1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the DALY LiFePo4 72V 100A 24S Smart Battery Management System (BMS). This BMS is designed to protect and optimize the performance of 3.2V Lithium Iron Phosphate (LiFePo4) battery packs in various applications, including energy storage, electric vehicles, and solar systems.
2. Safety Information
Please read and understand all safety instructions before installing or operating the BMS. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always wear appropriate personal protective equipment (PPE) when working with batteries and electrical systems.
- Ensure all power sources are disconnected before performing any wiring or maintenance.
- Verify correct wiring polarity and connections to prevent damage to the BMS, battery, or connected equipment.
- Do not short-circuit battery terminals.
- Keep the BMS and battery away from water, moisture, and flammable materials.
- Consult a qualified professional if you are unsure about any aspect of the installation or operation.
3. Package Contents
The following items are included in your DALY LiFePo4 72V 100A 24S Smart BMS package:
- 3.2V LiFePo4 BMS (1 unit)
- Bluetooth Module (1 unit)
- NTC Temperature Sensor (1 unit)
- Sampling Cable (1 unit)
- UART Cable (1 unit)
- Instruction Manual (1 unit)
4. Product Features
The DALY Smart BMS offers advanced protection and monitoring capabilities:
- Comprehensive Protection: Includes overcurrent, overcharge, overdischarge, short circuit, and temperature protection.
- Enhanced Durability: Features double protection with injection patent technology and a patent shell, providing waterproof, dustproof, shockproof, and anti-static properties.
- High-Quality Construction: Built with high-quality components and pressure-resistant, durable materials for high acquisition accuracy.
- Smart Monitoring: Allows users to check battery status and modify parameters at any time through a dedicated Bluetooth application or PC software.
- Certified Quality: ISO, FCC, RoHS, PSE, and CE approved.
5. Specifications
| Feature | Specification |
|---|---|
| Model Number | LFP24S |
| Battery Type | LiFePo4 (Lithium Iron Phosphate) |
| Cell Count | 24S |
| Nominal Voltage | 72V (for 3.2V nominal cells) |
| Continuous Discharge Current | 100A |
| Charge Current | 50A |
| Communication Interfaces | UART, Bluetooth |
| Product Dimensions (L x W x H) | 6.54 x 2.56 x 0.94 inches (166 x 65 x 24 mm) |
| Item Weight | 1.28 pounds |
| Manufacturer | Dongguan Daly Electronics Co., Ltd |
Note: The provided input voltage (120V) and output voltage (12V) specifications appear to be generic or refer to auxiliary functions, as the BMS is designed for a 72V battery system.
6. Setup and Installation
Careful installation is crucial for the proper functioning and safety of your BMS. Follow these steps precisely:
6.1 Tools Required
- Soldering iron (suggested temperature: 662 °F / 350 °C)
- Scissors
- Double-sided tape
- Tin wire
- Multimeter
6.2 Wiring Instructions
- Prepare Balance Wires: Before welding, ensure the white end of the balance wires and the BMS connection port are disconnected.
- Weld Balance Wires: Carefully weld the black and red balance wires to your battery pack. Ensure each cell connection is accurate.
- BMS Placement: Position the BMS ensuring its red cooling surface remains uncovered for optimal heat dissipation. Use DALY matching balance wires (regular length 450 mm / 17.72 inches).
- Connect Balance Wires: After confirming all balance wires are correctly welded, connect the balance wire harness to the BMS connection port.
- Connect Main Power Cables: Connect the main negative (B-) and positive (P-) cables from your battery pack to the corresponding terminals on the BMS.
- Connect Accessories: Install the Bluetooth module, NTC temperature sensor, and UART cable to their respective ports on the BMS.
Image: Wiring diagram for the DALY LiFePo4 Smart BMS. This diagram illustrates the connections from the battery cells to the BMS, and then to the motor/load and charger. It shows the balance wire connections, the main negative (B-) and positive (P-) terminals, and the integration points for external devices like the Bluetooth module and UART cable.
6.3 BMS Activation
The BMS can be activated using one of two methods:
- Method 1: Press the activation button located on the battery board (if available).
- Method 2: Connect a charger to the battery pack to activate the BMS for its first use.
6.4 Initial Parameter Setup
The BMS comes with default protection parameters. However, it is essential to set the actual capacity (AH) of your battery pack. If the capacity is not set correctly, the displayed percentage of remaining power will be inaccurate. Other parameters can also be adjusted to meet your specific needs.
- The initial password for the smart board application to change parameters is 123456.
Image: DALY Smart BMS showing the connection points for the Bluetooth module and UART cable. The Bluetooth module enables wireless communication with a smartphone app, while the UART cable allows connection to a PC for detailed monitoring and parameter configuration.
7. Operating Instructions
The DALY Smart BMS allows for convenient monitoring and parameter adjustment via a smartphone application (Bluetooth) or PC software (UART).
7.1 Bluetooth App Operation
- Ensure the Bluetooth module is connected to the BMS.
- Download and install the DALY Smart BMS application on your smartphone.
- Open the app and connect to your BMS via Bluetooth.
- Monitor real-time battery status, including voltage, current, temperature, and cell balance.
- Access and modify various protection parameters as needed (e.g., overcharge/overdischarge voltage, current limits).
Image: DALY Smart BMS with an attached Bluetooth module, wirelessly communicating with a smartphone displaying the BMS application interface. The app shows various battery parameters such as voltage, current, state of charge, and cell balance information.
7.2 PC Software Operation (UART)
- Connect the UART cable from the BMS to your computer.
- Install the DALY Smart BMS PC software.
- Launch the software to access detailed battery data and advanced parameter settings.
For detailed tutorials on connecting and using the various communication interfaces (Bluetooth APP, PC software, RS485, CANBUS), please refer to the official DALY website or contact customer support.
8. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your DALY Smart BMS and battery system.
- Keep Clean: Periodically clean the BMS to prevent dust accumulation, which can affect cooling and performance.
- Ensure Ventilation: Always ensure adequate airflow around the BMS, especially the cooling surface, to prevent overheating.
- Check Connections: Regularly inspect all wiring connections (balance wires, main power cables, communication cables) for tightness and signs of corrosion or damage.
- Monitor Parameters: Use the Bluetooth app or PC software to routinely monitor battery parameters and identify any anomalies early.
9. Troubleshooting
If you encounter issues with your DALY Smart BMS, consider the following troubleshooting steps:
- No Power/Activation Issues: Ensure the BMS is properly activated (by pressing the button or connecting a charger). Double-check all main power and balance wire connections.
- Bluetooth Connection Problems: If the Bluetooth connection is intermittent or fails, try restarting the app and the BMS. Ensure the Bluetooth module is securely connected. Verify no other devices are interfering with the signal.
- Incorrect Readings/Balancing Issues: Confirm that the battery pack capacity (AH) is correctly set in the app/software. Verify all balance wires are correctly connected and not damaged. The app may display
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