DALY Smart BMS Li-ion 12V 150A 4S Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your DALY Smart BMS Li-ion 12V 150A 4S. This Battery Management System is designed to protect 4-series (4S) lithium-ion battery packs with a nominal voltage of 12V and a maximum continuous discharge current of 150A. It features Bluetooth connectivity for monitoring and parameter adjustment, ensuring optimal performance and extended battery life.

1.1 Package Contents

• 3.7V Li-ion BMS (1 unit)
• Bluetooth Module (1 unit)
• NTC Sensor (1 unit)
• Sampling Cable (1 unit)
• UART Cable (1 unit)
• Instruction Manual (1 unit)

2. Safety Instructions

Please read and understand all safety instructions before installing or operating the DALY Smart BMS. Failure to follow these instructions may result in injury, damage to the product, or damage to other equipment.

• Always wear appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when handling batteries and electrical components.
• Ensure all wiring connections are correct and secure before applying power to prevent damage to the BMS or battery pack. Incorrect wiring can lead to severe hazards.
• Do not short-circuit the battery terminals. This can cause extreme heat, fire, or explosion.
• Keep the BMS away from water, moisture, flammable materials, and extreme temperatures. Operate within the specified environmental conditions.
• Only use the BMS with compatible 4S Li-ion battery packs (rated 3.7V per cell). Using it with incompatible battery types or cell counts can lead to malfunction or damage.
• Consult a qualified professional if you are unsure about any installation steps or encounter unexpected behavior.
• Do not attempt to disassemble or repair the BMS. Refer all servicing to qualified personnel.

3. Product Overview

3.1 Key Features

• Comprehensive Protection: Includes overcurrent, overcharge, overdischarge, short circuit, and temperature protection to safeguard your battery pack.
• Performance Optimization: Maximizes and optimizes lithium battery performance, significantly extending battery lifetime.
• Robust Design: Features double protection through injection patent technology and a patent shell, making it waterproof, dustproof, shockproof, and anti-static.
• High Accuracy: Utilizes high-quality components for pressure resistance, durability, and high acquisition accuracy for precise battery monitoring.
• Smart Functionality: Allows users to check battery status and modify parameters at any time via a dedicated Bluetooth application or PC software.
• Easy Installation: Designed for straightforward setup and integration into your battery system.

3.2 Components

The DALY Smart BMS package includes the main BMS unit, a Bluetooth module for wireless communication, an NTC temperature sensor for thermal monitoring, a sampling cable for individual cell voltage monitoring, and a UART cable for PC communication.

4. Specifications

The following table details the technical specifications of the DALY Smart BMS Li-ion 12V 150A 4S:

5. Setup and Installation

Careful wiring is crucial for the correct and safe operation of the BMS. Please follow these instructions precisely.

5.1 Wiring Diagram

This diagram shows the connection points for the battery pack (B- and B+), the motor/load, and the charger. Ensure all connections match the diagram for proper functionality.

5.2 Wiring Sequence

1. Important Note: The wire cables from different manufacturers may not be standard. Always use the matching cables provided with your BMS. Pay close attention to the B- and P- marks, as wire colors may vary.

   Critical Warning: When welding the sampling wire cable, do not insert the cable into the BMS until all other connections are complete and verified.

2. Connect the fine black wire of the sampling cable to the total negative electrode (B-) of the battery pack.

   Connect the second wire (red wire) of the sampling cable to the positive pole of the first series string of batteries. Continue connecting the positive electrode of each subsequent series string of batteries in turn until the last wire of the sampling cable is connected to the total positive (B+) of the battery pack.

3. After all sampling cables are connected to the battery pack, do not insert the plug directly into the BMS yet. First, measure the voltage between each two adjacent metal terminals on the back of the sampling cable plug. For a ternary lithium battery, the voltage should be between 3.0V-4.15V. For an iron-lithium battery (LiFePO4), it should be between 2.5V-3.6V. For a lithium titanate battery (LTO), it should be between 1.8V-2.8V. Ensure these voltages are correct before proceeding.

4. Connect the thick blue B- line from the BMS to the total negative electrode of the battery pack. The B- line length should not exceed 40cm.

5.3 Post-Wiring Verification

1. After completing all wiring, measure the voltage between the battery's B+ terminal and the BMS's P- terminal. This voltage should be equal to the total voltage of the battery pack itself. If these voltages match, the BMS is functioning correctly. If they do not match, re-check the entire wiring sequence as described above.

2. For a common port BMS, the positive electrodes of both the charging and discharging ends are connected directly to the total positive pole (B+) of the battery. The negative poles for both charging and discharging are connected to the P- point of the BMS.

6. Operating Instructions

The DALY Smart BMS offers convenient monitoring and parameter adjustment through both Bluetooth and UART interfaces.

6.1 Bluetooth App Connectivity

Monitor battery status and modify parameters wirelessly using the dedicated DALY BMS Bluetooth application on your smartphone.

• Ensure the Bluetooth module is securely connected to the BMS.
• Download the official DALY BMS app from your device's app store (e.g., Google Play Store or Apple App Store).
• Enable Bluetooth on your smartphone and search for available devices. Pair with the DALY BMS.
• Open the DALY BMS app and follow the in-app instructions to connect. You can then view real-time data such as total voltage, individual cell voltages, charge/discharge current, temperature, and cell balance status.
• Parameters like overcharge/discharge limits, balance settings, and temperature thresholds can be adjusted through the app interface.

6.2 PC Software Connectivity (UART)

For more advanced monitoring, data logging, and configuration, connect the BMS to a computer using the provided UART cable and DALY PC software.

• Connect the UART cable to the UART port on the BMS and to an available USB port on your computer.
• Install the DALY PC software, which can typically be downloaded from the manufacturer's official website.
• Open the software and establish a connection with the BMS. The PC software provides comprehensive data logging, detailed parameter adjustment, and advanced diagnostic capabilities.

7. Troubleshooting

This section addresses common issues you might encounter with your DALY Smart BMS.

7.1 Common Issues and Solutions

• BMS not powering on or no output:
  • Verify all main power wiring connections (B- and P-) are secure and correct.
  • Check the total battery pack voltage to ensure it is within the operational range for a 4S Li-ion pack (typically 10V-16.8V).
  • Ensure the sampling cable is correctly inserted into the BMS and that individual cell voltages are balanced and within acceptable limits.
• Bluetooth connection issues:
  • Ensure the Bluetooth module is securely connected to the BMS's designated port.
  • Restart the BMS (by disconnecting and reconnecting the main battery power) and your smartphone's Bluetooth.
  • Confirm you have downloaded and are using the correct official DALY BMS application.
• Overcharge or Overdischarge protection tripping frequently:
  • Review your battery pack's specific voltage limits and adjust the BMS parameters accordingly via the Bluetooth app or PC software.
  • Check individual cell voltages for significant imbalance. If cells are severely unbalanced, a dedicated active balancer may be required.
  • Ensure your charger's voltage and current settings are appropriate for a 4S Li-ion pack.
• BMS overheating:
  • Ensure adequate ventilation around the BMS. Do not enclose it in a confined space without airflow.
  • Verify that the continuous discharge current of your load does not exceed the BMS's rated capacity (150A).
  • Check for any short circuits or excessive current draw in the connected load.

For further assistance or issues not covered here, please refer to the contact information in the Support section.

8. Warranty and Support

8.1 Technical Support

DALY is committed to providing excellent customer service. We offer 24-hour one-on-one customer service and lifetime technical support for our products. If you require assistance with installation, operation, troubleshooting, or have any technical questions, please do not hesitate to contact DALY customer service through the official channels provided by your retailer or on the DALY website.

For customized BMS solutions or bulk orders, please contact the manufacturer directly for specialized assistance.

8.2 Quality Assurance

This DALY Smart BMS product is manufactured under strict quality control standards and is ISO/FCC/RoHS/PSE/CE APPROVED. This certification ensures high quality, reliability, and compliance with relevant international safety and environmental standards.