Daly 3S 12V Li-ion Battery Management System (BMS) Instruction Manual

1. Introducció

This manual provides essential information for the safe and effective use of your Daly 3S 12V Li-ion Battery Management System (BMS). The BMS is designed to protect 3-series (3S) lithium-ion battery packs, ensuring their longevity and safe operation by managing charging, discharging, and balancing processes. This model supports various current ratings from 10A to 60A.

2. Informació de seguretat

• Always handle battery packs and BMS modules with care.
• Ensure correct polarity when connecting the BMS to the battery pack and load/charger. Incorrect connections can cause damage to the BMS, battery, or connected devices, and pose a fire hazard.
• No curtcircuiteu els terminals de la bateria.
• Treballar en una zona ben ventilada.
• Utilitzeu equips de protecció individual (EPI) adequats, com ara ulleres de seguretat i guants aïllants.
• Keep the BMS away from moisture and extreme temperatures. The product is sealed and waterproof, but proper installation is still crucial.
• Si no esteu segurs de cap pas, consulteu un professional qualificat.

3. Característiques del producte

The Daly 3S Li-ion BMS offers robust protection and performance for your battery packs:

• Superior Protection: Designed with high-precision components to ensure optimal battery health.
• Imported MOS: Utilizes imported custom MOS transistors for lower internal resistance and extended lifespan.
• Sealed & Waterproof: Features a fully enclosed one-piece molding sealant, providing waterproof, dustproof, shockproof, fireproof, and anti-freeze antistatic properties.
• Dissipació de calor eficient: Solid heat dissipation design with a burgundy high-efficiency aluminum alloy heat sink, sandblasted and oxidized using the same process as high-end electronics.
• Integrated IC: Small size with large capacity, offering faster reaction and intelligent management for complex projects.
• Balance Function: Includes a balance function to equalize cell voltages, prolonging battery life.
• Protecció integral: Over-charge protection, over-discharge protection, and short-circuit protection.
• Aplicació àmplia: Suitable for various applications including Li-ion power batteries, energy storage lithium batteries, electric scooters, e-bikes, tourist sightseeing vehicles, electric tricycles, low-speed EVs, emergency UPS, solar street lights, and RV/home energy storage.
• Reliable Wiring: Wires are designed for safety and reliability, featuring strong flame retardancy and good flexibility for various wiring angles.

4. Especificacions

The Daly 3S Li-ion BMS is available in various current ratings. Below are the general specifications. Please refer to the specific product label for your exact model's ratings.

General Product Properties:

• Tipus d'accessori: Accessoris de bateries
• Origen: Xina continental
• Certificació: CE, FCC, RoHS, PSE
• Sèrie de bateries: 3S
• Volum nominaltage: 12V (for 3.7V lithium battery rated cells)
• Protecció de sobrecàrrega: Sí
• Sobre Descàrrega Voltage: Sí
• Protecció contra curtcircuits: Sí
• Balance Function: Sí
• Carregador inclòs: No
• Bateria inclosa: No
• Substància química molt preocupant: Cap

Detailed Specifications (Common Port):

Dimensions:

Dimensions vary by current rating. For exampLI:

• 10A/15A Common Port: Aproximadament 59 mm x 34 mm x 9 mm
• 30A/40A Common Port: Aproximadament 75 mm x 48 mm x 9 mm
• 50A/60A Common Port: Aproximadament 80 mm x 61 mm x 16 mm

5. Configuració i instal·lació

Proper installation is critical for the safe and correct operation of the BMS. Follow these steps carefully:

Wiring Diagram for Common Port:

1. Balance Wires: Do NOT insert balance wires into the BMS connector before connecting the batteries. Ensure all battery connections are correct first.
2. Connecting Sequence for BMS:
   • From the thin black balance wire (B-) to start, connect the 2nd wire (thin red wire) with the 1st battery's positive pole.
   • Then connect each cell's positive pole in order until the last one (B+).
   • Do not insert the connector directly after the wires are connected. Measure the voltage between two adjacent metal terminals on the back of the connector.
   • If it is a Li-ion battery, the voltage should be between 3.6V – 4.2V.
   • If it is a LiFePO4 battery, the voltage should be between 2.0V – 3.6V.
   • If it is an LTO battery, the voltage should be between 1.5V – 2.75V.
3. Verificació: After the wiring sequence and voltage are confirmed to be correct, then insert the balance connector into the BMS. Adjust a multimeter to the buzzer position and measure the internal resistance between B- and P-. If the internal resistance is 0, there will be a beep, which means the BMS is good. Otherwise, do not weld and contact customer service.
4. Pas final: Connect B- (thick blue wire) with the battery pack's total negative pole.
5. After Finished Wiring: Mesura el voltage between B+ and B-voltage and B+ and P-voltage. If they are equal, the BMS works normally and can be used. If not, please recheck the wiring sequence.

Important Note: Incorrect wiring can permanently damage the BMS and battery pack. Always double-check all connections before applying power.

6. Instruccions de funcionament

Once installed correctly, the BMS operates automatically to manage your battery pack. It continuously monitors cell voltages, current, and temperature to ensure safe operation.

• Càrrega: Connect your compatible 12.6V (for 3S Li-ion) charger to the designated charge input. The BMS will manage the charging process, including over-charge protection and cell balancing.
• Descàrrega: Connect your load to the designated discharge output. The BMS will monitor the discharge current and prevent over-discharge.
• Balance Function: The balance function works automatically to equalize the voltage across individual cells in the battery pack, especially during charging, to maximize battery life and performance.

7. Manteniment

The Daly BMS is designed for low maintenance. However, periodic checks can help ensure optimal performance:

• Inspecció visual: Periodically inspect the BMS and all connections for any signs of damage, corrosion, or loose wires.
• Neteja: Keep the BMS clean and free from dust and debris. While dustproof, excessive buildup can affect heat dissipation.
• Temperatura: Ensure the operating environment remains within the specified temperature range (-20℃ to 70℃).
• Emmagatzematge: If storing the battery pack with the BMS for an extended period, ensure it is charged to a suitable storage voltage (typically around 3.7V per cell for Li-ion) to prevent over-discharge.

8. Solució De Problemes

If you encounter issues with your BMS, consider the following common problems and solutions:

• No Output/Input:
  • Check all wiring connections for correct polarity and secure contact.
  • Verify that the battery pack voltage is within the normal operating range.
  • Ensure the balance wires are correctly connected and inserted into the BMS.
  • Measure the internal resistance between B- and P- as described in the installation section.
• BMS Overheating:
  • Ensure adequate ventilation around the BMS.
  • Verify that the load current does not exceed the rated continuous discharge current of your specific BMS model.
  • Check for any short circuits in the load or battery pack.
• Unbalanced Cells:
  • Allow the battery pack to sit for some time after charging to allow the balance function to work.
  • Ensure the balance wires are properly connected to each cell.
• BMS Not Charging:
  • Check the charger output voltage i corrent.
  • Verify that the charge current does not exceed the rated charge current of your BMS.
  • Ensure the BMS is not in an over-discharge protection state (if so, a small charge current might be needed to reactivate).

For persistent issues, please refer to the detailed wiring instructions or contact technical support.

9. Consells d'usuari

• Verify Cell Voltages: Before connecting the balance wires to the BMS, always measure the voltage of each individual cell to ensure they are within a reasonable range and to prevent damage during initial connection.
• Proper Soldering: When connecting wires, use good soldering practices to ensure strong, reliable connections that can handle the expected current without resistance buildup or disconnection.
• Tubs termoretràctils: Use heat shrink tubing on all exposed connections to prevent accidental short circuits and provide additional insulation.
• Muntatge segur: Mount the BMS securely to prevent vibrations or physical impacts from damaging the board or connections.
• Match BMS to Battery: Always ensure the BMS current rating (discharge and charge) is appropriate for your battery pack and intended application. Using an undersized BMS can lead to overheating and failure.

10. Certificacions

The Daly BMS has obtained several international certifications, ensuring its quality and compliance with safety standards:

• CE
• FCC
• RoHS
• PSE
• ISO (Quality Management System)
• Waterproof Patent

11. Contingut del paquet

Your Daly BMS package typically includes:

• Daly 3S Li-ion BMS module (specific current rating)
• Balance wires/cables

12. Garantia i Suport

For warranty information, technical support, or any questions regarding your Daly BMS, please contact the seller or manufacturer directly. Ensure you have your product model and purchase details available for faster assistance.