DALY 20S 72V Li-ion BMS Instruction Manual

1. Introducció

This manual provides essential information for the safe and effective installation, operation, and maintenance of your DALY 20S 72V Li-ion Battery Management System (BMS). The BMS is designed to protect your lithium battery pack, ensuring its longevity and safe performance in various applications such as electric bicycles, scooters, motorcycles, portable power supplies, and energy storage systems.

The DALY BMS offers comprehensive protection features including overcharge, over-discharge, over-current, short-circuit, and temperature protection, along with cell balancing functions.

2. Contingut del paquet

Please verify that all items are present in your package. The typical packing list for a K series 60A BMS includes:

• 1 x BMS Unit
• 1 x manual d'instruccions
• 1 x Output wire B-P- (Gift, for K/M Series)
• 1 x NTC (H series integrated NTC)
• 1 x cable

3. Instal·lació i cablejat

Proper installation is critical for the safe and correct operation of your BMS. The following steps outline the wiring process, using an H series 60A BMS as an example. Always ensure power is disconnected before beginning installation.

1. Solder the sampling cables: The first black cable in the sampling cable set connects to the total negative terminal of the battery pack (B-). Subsequent red cables connect to the positive terminal of the first string of batteries, then the positive terminal of the second string, and so on, until all balance cables are connected to their respective cell positive terminals.
2. Comproveu els cables: After connecting the sampling cables, measure the voltage between adjacent cables starting from the header. Ensure there are no wrong connections or missing connections. The voltage difference between adjacent balance wires should correspond to the voltage of a single cell.
3. Connect the output wires: Connect the B- wire of the BMS to the total negative terminal of the battery pack. Then, plug the sampling cable into the BMS. After activating the BMS, measure the voltage between B+ & B- and the voltage between P+ & P-. These voltages should be consistent with the battery pack voltage.

Consells d'instal·lació:

• The BMS is designed for easy installation, featuring a small size and screw positioning holes (Note: G and H BMS are with fixed welding wire, without screw positioning hole).
• Utilize the snap-on plug for a tight connection and stable communication between the BMS and the battery pack.

4. Funcionament i característiques

The DALY BMS provides robust protection and efficient management for your lithium battery pack.

4.1 Basic Protection Functions

The BMS integrates multiple layers of protection to safeguard your battery:

• Protecció de sobrecàrrega: Prevents cells from being charged beyond their safe voltage límit.
• Protecció de sobredescàrrega: Stops discharge when cells reach their minimum safe voltage.
• Protecció contra sobreintensitat: Limits current during charge and discharge to prevent damage.
• Protecció contra curtcircuits: Immediately cuts off current in case of a short circuit.
• Protecció de temperatura: Monitors battery temperature via NTC and prevents operation outside safe temperature ranges.
• Waterproof, Anti-vibration, Anti-oxidation: Enhanced durability through patented glue injection process.
• Protecció electrostàtica: Protegeix contra les descàrregues electrostàtiques.

4.2 Funcions avançades

• Ultra-high Precision Real-time Monitoring: Equipped with high-precision AFE (Analog Front End) for accurate acquisition of battery data. Short-circuit protection reacts within 10-500 microseconds.
• Baix consum d'energia: The BMS operates with a working current of less than 400uA, ensuring energy efficiency.
• Enhanced Passive Balancing Function: Features 100mA passive balance (G-series has 30mA) to effectively maintain cell consistency and extend battery life.
• High-power Precharge: Effectively prevents false trigger protection caused by instantaneous high current at startup and prevents multiple power-on failures. (Note: G and H type BMS do not have the pre-charging function).

5. Manteniment

The DALY BMS is designed for durability and minimal maintenance. Key features contributing to its robustness include:

• Moisture-proof, Anti-vibration, Anti-oxidation: A national patent glue injection process greatly improves the protection of the BMS against environmental factors.
• Monitorització de la temperatura: All series of DALY BMS are equipped with NTC to monitor temperature changes in real-time, preventing thermal damage to the battery.

Regularly inspect all wiring connections for tightness and signs of wear or corrosion. Ensure the BMS unit is kept clean and free from excessive dust or debris.

6. Solució De Problemes

If you encounter issues with your DALY BMS, consider the following common troubleshooting steps:

• Sense potència de sortida:
• Verify all wiring connections are secure and correct according to the installation diagram.
• Check battery cell voltages to ensure they are within the safe operating range (not over-discharged or overcharged).
• If short-circuit protection is triggered, remove the load to release the protection.
• Balancing Issues:
• Ensure the battery pack has been fully charged, as balancing typically occurs during the charging process or when cells reach a certain voltage equilibrium.
• Comproveu el vol cel·lular individualtages to identify any significant discrepancies.
• Avisos de temperatura:
• Ensure the BMS and battery pack are operating within the specified temperature ranges (Charging: 20-55°C, Discharge: -40-75°C).
• Check for proper ventilation around the battery pack and BMS.

For complex issues or if the problem persists, please contact DALY customer service for further assistance.

Consells per a l'usuari

• Always double-check all wiring connections and voltage readings before applying power to prevent damage to the BMS or battery pack.
• If your application requires regenerative current capabilities, please consult DALY customer service to confirm compatibility or inquire about specific models that support this feature.

7. Especificacions

The DALY BMS is available in various series (G, H, K, M) with different current ratings and dimensions. The tolerance range of dimensional data is ±0.5mm.

Detailed Technical Parameters (Example for 20S 72V)

Dimensions and Current Ratings by Series

8. Garantia i Suport

Garantia: 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 shipping costs for warranty service.

Suport tècnic: DALY is committed to providing reliable technical support. With extensive R&D capabilities and a team of experienced engineers, DALY offers comprehensive solutions for lithium battery users. If you require customized services or have specific technical inquiries, please consult DALY customer service for detailed information.