1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Daly 3.7V Li-ion 17S 60V Battery Protection Board (BMS). This BMS is designed to manage and protect 17-series Li-ion battery packs, commonly used in applications such as electric bikes, scooters, and other e-mobility devices. It ensures the longevity and safety of your battery by monitoring various parameters and providing critical protections.
Note: A 17S Li-ion BMS is specifically designed for a 17-series Li-ion battery pack, with a charging voltage of 17 x 4.2V = 71.4V.
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, serious injury, or property damage.
- Professional Installation Recommended: Installation of a BMS involves working with high voltage and current. It is strongly recommended that installation be performed by a qualified professional.
- Correct Polarity: Always ensure correct polarity when connecting the BMS to the battery pack and load. Incorrect connections can cause severe damage to the BMS, battery, and connected devices.
- Insulation: Ensure all connections are properly insulated to prevent short circuits.
- Avoid Water and Moisture: While the BMS features patented waterproof technology, avoid exposing it to excessive moisture or water to prevent damage.
- Temperature: Operate the BMS within its specified temperature range. Excessive heat or cold can affect performance and safety.
- Physical Damage: Do not subject the BMS to strong impacts or physical damage.
3. Product Overview
The Daly DL 17S BMS is a high-performance battery management system designed for 3.7V Li-ion battery packs. It offers comprehensive protection and intelligent management features to optimize battery life and ensure safe operation.
Key Features:
- Comprehensive Protection: Includes overcharge, over-discharge, over-current, short-circuit, temperature, and electrostatic protection.
- Real-time Monitoring: Ultra-high precision AFE (Analog Front End) for accurate acquisition of battery data and rapid short-circuit protection reaction (10-500us).
- Passive Balancing: Enhanced 100mA passive balancing function (G-series BMS has 30mA passive balance) to effectively maintain cell consistency and extend battery life.
- Low Power Consumption: Working current typically less than 400uA.
- Robust Design: Features patented waterproof, anti-vibration, and anti-oxidation properties through a glue injection process.
- Snap-on Plug: Ensures tight connection and stable communication for sampling cables.
- Precharge Function: High-power precharge effectively prevents false trigger protection caused by instantaneous high current at startup (Note: G and H type BMS do not have the function of pre-charging).
- Compact Size: Smaller size for easier installation and space-saving.
Applications:
This BMS is suitable for a wide range of lithium battery applications, including:
- Electric bicycles
- Electric two-wheelers
- Electric tricycles
- Portable power supplies
- Outdoor energy storage
- Floor sweepers
- Tour vehicles
- RV energy storage
- Low-speed cars
4. Specifications
The following tables detail the specifications for various Daly BMS series. Please refer to the specific model you have purchased.
General Specifications (Tolerance range of dimensional data is ±0.5mm):
| Series | Current | Size (mm) | B-P- Cable | Cable Length |
|---|---|---|---|---|
| G Series | 15A/25A | 34*59*9 | 16AWG/14AWG | 100mm |
| H Series | 40A/60A | 48*75*14 | 8AWG | 160mm |
| K Series | 40A/60A/100A | 65*123*14 | 10AWG | 100mm |
| M Series (150A) | 150A | 66*164*21 | 6AWG | 150mm |
| M Series (200A) | 200A | 66*164*21 | 4AWG | 150mm |
Detailed Protection Parameters:
| Parameter | Li-ion (Battery string * 4.2V) | LiFePO4 (Battery string * 3.65V) |
|---|---|---|
| Rated discharge current (V) | N/A | N/A |
| Charging current (A) | 15, 20, 40, 60, 100, 150, 200 | 15, 20, 40, 60, 100, 150, 200 |
| Discharge overcurrent protection value (A) | 35±10, 60±10, 138±30, 180±30, 125±10, 175±10, 266±20, 266±20 | 35±10, 60±10, 138±30, 180±30, 125±10, 175±10, 266±20, 266±20 |
| Charge overcurrent protection (A) | 15±2, 25±3, 56±10, 70±10, 50±10, 70±10, 106±20, 400±20 | 15±2, 25±3, 56±10, 70±10, 50±10, 70±10, 106±20, 400±20 |
| Main circuit on-resistance (mΩ) | <20 | |
| Passive equalization function (100±20mA) | Equalization turn-on voltage: Li-ion: 4.075-4.175V | Equalization turn-on voltage: LiFePO4: 3.375-3.525V |
| Balance current (mA) | Li-ion: 100±20 | LiFePO4: 70±20 |
| Single Cell over-charge protection | Protection voltage (V): Li-ion: 4.25±0.05V | Protection voltage (V): LiFePO4: 3.65±0.05V |
| Protection delay (s) | 1±0.5 | |
| Recovery voltage (V) | Li-ion: 4.10±0.05V/4.15±0.05V | LiFePO4: 3.50±0.05V/3.55±0.05V |
| Single Cell over-discharge protection | Protection voltage (V): Li-ion: 2.7±0.05V/2.8±0.05V | Protection voltage (V): LiFePO4: 2.3±0.05V/2.7±0.05V |
| Protection delay (s) | 1±0.5 | |
| Recovery voltage (V) | Li-ion: 2.8±0.05V/3.0±0.05V | LiFePO4: 2.3±0.05V/2.7±0.05V |
| Charge/discharge over-current protection | Protection delay (s): 1±0.5 | |
| Release condition | Removing the load is lifted | |
| Short circuit protection | Short circuit protection conditions: External load short circuit. Short circuit protection delay (us): 10-500. Short circuit protection released: Remove load release. | |
| Temperature protection (°C) | Charging: 20-55, Discharge: -40-75 | Charging: 20-55, Discharge: -40-75 |
| Storage temperature (°C) | -40-85 | |
| Current consumption | Working current: <400uA | |
* The above data are the test results at room temperature in DALY laboratory. If you need more detailed parameters, please contact customer service to ask for specifications.
5. Installation and Wiring
Proper installation and wiring are critical for the safe and correct operation of the BMS. The following steps outline the general procedure. Always refer to the specific wiring diagram for your BMS model.
Wiring Steps:
- Solder the sampling cables: The first cable in black in the sampling cable set is connected to the negative terminal of the battery. The second cable (red) is connected to the positive terminal of the first string of batteries, and the third cable (red) is connected to the positive terminal of the second string of batteries, and so on, until all cables are connected.
- Check the cables: After connecting the cables, measure the voltage between two adjacent cables starting from the header to make sure there are no wrong connections or missing connections.
- Connect the output wires: Connect the B- wire of the BMS to the total negative terminal of the battery pack, and then plug the sampling cable to the BMS. After activating the BMS, make sure that the voltage (battery voltage) between B+ & B- and the voltage between P+ & P- are consistent.
Important: Ensure all connections are secure and insulated. Double-check all polarities before applying power.
6. Operating Instructions
Once the Daly BMS is correctly installed and wired, it will automatically manage and protect your battery pack. There are no specific user-adjustable settings for basic operation.
- Charging: Connect your compatible charger to the battery pack. The BMS will monitor the charging process, ensuring cells do not overcharge and balancing cell voltages.
- Discharging: Connect your load (e.g., electric bike motor) to the battery pack. The BMS will monitor the discharge, preventing over-discharge and over-current conditions.
- Balancing: The passive balancing function works continuously to equalize the voltage across individual cells, especially during charging, to maximize battery life and performance.
7. Maintenance
The Daly BMS is designed for minimal maintenance. However, following these guidelines can help ensure its longevity:
- Regular Inspection: Periodically inspect the BMS and its connections for any signs of physical damage, corrosion, or loose wiring.
- Cleanliness: Keep the BMS clean and free from dust and debris. Use a dry, soft cloth for cleaning.
- Environmental Conditions: Ensure the BMS operates within its specified temperature and humidity ranges. Avoid extreme conditions.
- Firmware Updates: If your BMS model supports firmware updates (e.g., via APP or PC software), follow the manufacturer's instructions for any available updates to ensure optimal performance and security.
8. Troubleshooting
If you encounter issues with your Daly BMS, consider the following common problems and solutions:
- No Power Output:
- Check all wiring connections for looseness or incorrect polarity.
- Verify the battery pack voltage is within the operational range.
- The BMS might be in a protection state (e.g., over-discharge, short-circuit). Disconnect the load and/or charger, wait a few minutes, and then reconnect.
- Charging Issues:
- Ensure the charger is compatible and functioning correctly.
- Check for overcharge protection activation.
- Verify the temperature of the battery pack is within the charging temperature range.
- Balancing Issues:
- Passive balancing takes time. Ensure the battery pack is allowed sufficient time to balance, especially during charging cycles.
- If significant cell voltage differences persist, inspect individual cell connections.
- Overheating:
- Ensure adequate ventilation around the BMS and battery pack.
- Reduce the load if the BMS is consistently overheating.
For complex issues or if troubleshooting steps do not resolve the problem, please contact customer service or a qualified technician.
9. User Tips
- This BMS is highly versatile and can be used for various applications, including electric bikes, e-bikes, and scooters, providing reliable battery management.
- Consider the current rating (40A, 60A, 100A) carefully based on your motor's power requirements to ensure optimal performance and safety.
- Always use the provided cables and connectors for installation to ensure compatibility and secure connections.
10. Frequently Asked Questions (FAQ)
- Q: What is the warranty for this product?
- A: From the date of purchase, the product is guaranteed free of charge within one year under normal use. The user is responsible for round-trip freight costs.
- Q: How accurate is the product data?
- A: The data, descriptions, pictures, and statistical texts of all products in this store come from the company's internal test measurement results or reports and are for reference only. The actual object shall prevail.
11. Warranty and Support
Warranty: Your Daly BMS is covered by a one-year warranty from the date of purchase, provided it is used under normal conditions. The customer is responsible for all shipping costs associated with warranty claims.
Technical Support: For any technical inquiries, detailed specifications, or customized service requirements (e.g., structure, hardware, software), please consult Daly customer service. They can provide assistance with NTC, power display boards, soft switches, internal storage, buzzers, mobile phone APP, PC software, and communication protocols.
Company Overview:
DALY, founded in 2015, is a leading new energy lithium battery management system (BMS) high-tech enterprise. They focus on R&D, production, sales, and service of BMS, holding over 100 technical patents. Their products are sold in more than 130 countries and regions worldwide, committed to providing safer, more efficient, and smarter BMS solutions for lithium battery users.
