DALY Smart Active Balance BMS 150A (8S-17S) Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your DALY Smart Active Balance Battery Management System (BMS) 150A. This BMS is designed to protect and optimize the performance of Li-ion, LiFePO4, and LTO battery packs with configurations ranging from 8S to 17S and a voltage range of 24V-60V. It features active balancing, integrated Bluetooth, RS485, and CAN communication capabilities.

2. Important Safety Information

Always disconnect the battery pack from any power source before installing or servicing the BMS.
Ensure all wiring connections are correct and secure to prevent short circuits or damage. Incorrect wiring can lead to severe damage to the BMS, battery, or connected equipment, and poses a fire hazard.
Wear appropriate personal protective equipment (PPE), including insulated gloves and eye protection, when working with batteries and electrical components.
Do not attempt to open or modify the BMS unit. Refer all servicing to qualified personnel.
Verify the battery type (Li-ion, LiFePO4, LTO) and cell count (S-number) are compatible with this BMS model before installation.
Keep the BMS away from water, moisture, and extreme temperatures.

3. Product Overview and Features

The DALY Smart Active Balance BMS is a sophisticated battery management system designed for optimal battery performance and longevity. Key features include:

Smart 1A Active Balance: Helps equalize the state of charge/discharge across battery cells, extending battery life.
Wide Compatibility: Supports 8S-17S configurations (24V-60V) for Li-ion, LiFePO4, and LTO battery packs. Also supports parallel battery pack configurations.
Integrated Bluetooth: Allows for wireless monitoring of cell voltages, temperatures, and other parameters via a mobile application.
Multiple Communication Interfaces: Includes RS485 and CAN for advanced system integration and control.
Comprehensive Protection: Safeguards batteries against overcharge, overdischarge, overcurrent, short circuits, and high temperatures.
Cloud Monitoring & Data Logging: Provides capabilities for remote monitoring and historical data analysis (requires optional WiFi module).

Figure 3.1: DALY Smart Active Balance BMS 150A unit with included accessories.

Figure 3.2: Overview of key features including cell count, current, balance, function, battery type, and communication.

4. Packing List

Please verify that all items are present in the package:

Smart Active Balance BMS unit
P-&B- Cable
Screws (2 Pcs)
Sampling Cable
B+ Cable
NTC (Temperature Sensor - one standard, two optional)
User Manual (this document)
Packaging Box
RS485/CAN Port Cable

DALY Smart Active Balance BMS packing list

Figure 4.1: Visual representation of the DALY BMS and its included components.

5. Setup and Installation

Proper installation is critical for the safe and effective operation of your DALY BMS. It is imperative to follow the wiring sequence precisely.

5.1 Pre-Installation Checks

Confirm your battery pack's cell count (8S-17S) and chemistry (Li-ion, LiFePO4, LTO) are compatible with this BMS model.
Ensure all individual battery cells are balanced to a similar voltage before connecting the BMS.
Verify that all cables and connectors are in good condition.

5.2 Wiring Instructions

Connect the B- wire: Connect the thick black B- wire from the BMS to the negative terminal of your battery pack.
Connect the P- wire: Connect the thick black P- wire from the BMS to the negative terminal of your load/charger.
Connect the B+ wire: Connect the thick red B+ wire from the BMS to the positive terminal of your battery pack.
Connect Balance Wires: Carefully connect the balance wires (sampling cable) to each cell's positive terminal, starting from B0 (negative of the first cell) up to B17 (positive of the 17th cell), ensuring the correct sequence. Incorrect balance wire connection is a common cause of issues and can damage the BMS.
Connect NTC (Temperature Sensor): Connect the NTC sensor to the designated port on the BMS and place the sensor on a battery cell to monitor temperature.
Connect Communication Cables: If using RS485 or CAN, connect the respective cables to the BMS and your communication device.
Final Check: Double-check all connections before applying power.

Figure 5.1: General wiring diagram for the DALY Smart Active Balance BMS. Ensure B- and P- are correctly identified and connected.

Figure 5.2: Illustration of the pre-charge connection for the BMS.

Figure 5.3: Detailed view of connecting balance wires to individual battery cells.

Figure 5.4: Example of connecting multiple BMS units in a parallel battery pack configuration.

Figure 5.5: Illustration of the B+ connection point on the battery pack.

6. Operation

6.1 Mobile App Monitoring (Bluetooth)

The DALY Smart BMS features integrated Bluetooth for convenient monitoring via a mobile application.

Download the "BalanceBMS" app from the iOS App Store or Android Play Store.
Enable Bluetooth on your mobile device.
Open the app and search for your BMS device.
Once connected, you can monitor real-time data such as individual cell voltages, total pack voltage, current, temperature, and protection status.
The app also allows for basic parameter adjustments and viewing of historical data.

6.2 Advanced Monitoring and Configuration (UART/RS485/CAN)

For advanced monitoring, data logging, and detailed parameter configuration, the BMS supports UART, RS485, and CAN communication interfaces. These typically require a dedicated adapter (e.g., USB-UART, WiFi module, or RS485/CAN adapter) and PC software or an IoT cloud platform.

Connect the appropriate communication adapter to the BMS UART, RS485, or CAN port.
Install the corresponding PC software or configure your IoT cloud platform.
Refer to the specific adapter's manual for detailed connection and software usage instructions.

Figure 6.1: Diagram illustrating the various communication options and modules supported by the DALY BMS, including PC host, mobile app, IoT cloud, GPS, buzzer, and temperature control.

7. Maintenance

The DALY Smart Active Balance BMS is designed for minimal maintenance. The active balancing feature continuously works to equalize cell voltages, which is crucial for the long-term health of your battery pack.

Regular Monitoring: Periodically check the battery parameters via the mobile app or PC software to ensure normal operation.
Visual Inspection: Occasionally inspect all wiring and connections for any signs of wear, corrosion, or looseness.
Cleanliness: Keep the BMS unit clean and free from dust and debris to ensure proper heat dissipation.

8. Troubleshooting

If you encounter issues with your DALY Smart Active Balance BMS, refer to the following common problems and solutions:

Problem	Possible Cause	Solution
BMS not powering on / No output	Incorrect wiring sequence; loose connections; BMS in protection mode.	Review Section 5.2 "Wiring Instructions" and ensure all connections are correct and secure, especially the balance wires. Disconnect and reconnect the battery in the correct sequence. Check for any short circuits on the output.
Bluetooth connection issues / App not connecting	Bluetooth on phone disabled; app not updated; interference; BMS not active.	Ensure Bluetooth is enabled on your mobile device. Restart the "BalanceBMS" app. Move closer to the BMS unit to reduce interference. Verify the BMS is powered on and functioning.
Cells not balancing properly	Significant initial cell voltage difference; faulty balance wire connection.	Ensure cells are initially balanced before BMS installation. Check balance wire connections for proper sequence and secure contact. Allow sufficient time for the active balance function to work, especially with large imbalances.
BMS frequently enters protection mode	Overcurrent, overvoltage, undervoltage, or over-temperature condition.	Check the load current to ensure it does not exceed the BMS's rated current (150A). Monitor cell voltages to ensure they stay within safe operating limits. Verify battery temperature is within acceptable range. Adjust protection parameters via the app/PC software if necessary, ensuring they are appropriate for your battery chemistry.

9. Specifications

Feature	Detail
Model Number	R24TM-150A
Supported Cell Count	8S-17S
Supported Battery Types	Li-ion, LiFePO4, LTO
Discharging Current	150A
Charging Current	150A
Active Balance Current	1A
Communication Interfaces	Bluetooth, RS485, CAN, UART
Product Dimensions (L x W x H)	6.97 x 2.6 x 0.63 inches (177 x 66 x 16 mm)
Item Weight	9.7 ounces (275 Grams)
Manufacturer	Dongguan Daly Electronics Co., Ltd

DALY BMS Size and Current Specifications

Figure 9.1: Table showing various DALY BMS models with their current ratings, sizes, and cable specifications. This model is 150A.

10. Application Scenarios

The DALY Smart Active Balance BMS is suitable for a wide range of applications requiring reliable battery management:

Figure 10.1: Examples of applications including electric two-wheelers, home energy storage, electric bicycles, electric tricycles, outdoor energy storage, electric wheelchairs, lead-acid to lithium upgrades, AGV, lease battery swapping, and RV energy storage.

11. Warranty and Support

Your DALY Smart Active Balance BMS comes with an 18-month warranty from the date of purchase, covering manufacturing defects. For technical assistance, troubleshooting, or warranty claims, please contact DALY customer service through your purchase platform or the official DALY website.

Please have your model number (R24TM-150A) and purchase details ready when contacting support.

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DALY R24TM-150A