DALY 16S 60V Li-ion BMS Instruction Manual

1. Introduction

The DALY DL16S Battery Management System (BMS) is engineered to provide comprehensive protection and management for 16-series 3.7V rated Li-ion battery packs. It integrates essential safety features such as overcharge, over-discharge, overcurrent, and short-circuit protection, along with a balancing function to maintain cell health and extend battery lifespan. This manual provides detailed instructions for proper installation, operation, and maintenance of your DALY BMS.

2. Safety Precautions

• Always ensure correct polarity when connecting the BMS to the battery pack. Incorrect wiring can cause damage to the BMS, battery, or connected devices.
• Do not attempt to modify or disassemble the BMS.
• Ensure all connections are secure and insulated to prevent short circuits.
• Handle battery packs with care, especially during wiring.
• The BMS is designed for 3.7V rated Li-ion batteries; do not use with 3.2V rated LiFePO4 batteries unless specified for a different model.
• The BMS is waterproof, dustproof, and shockproof, but avoid intentional exposure to extreme conditions.

3. Setup and Wiring Instructions

Proper wiring is critical for the safe and effective operation of the DALY BMS. Please follow these instructions carefully.

3.1. General Wiring Principles

• **Balance Wires:** Do NOT insert balance wires into the BMS connector before connecting the main battery wires. Ensure all battery cells are connected correctly before plugging in the balance cable.
• **Connection Sequence:**
  1. Connect the thin black balance wire to the 1st battery's positive pole.
  2. Connect each cell's positive pole in order until the last one.
  3. After connecting all balance wires, insert the connector into the BMS.
  4. Measure the voltage between two adjacent metal terminals on the back of the connector. If it's a Li-ion battery, the voltage should be between 3.0V – 4.2V.
  5. Adjust the multimeter to the buzzer position and confirm the internal resistance between B- and P-. If there is a beep, the BMS is good. Otherwise, recheck the wiring.
  6. Connect the main B- (thick blue wire) with the battery pack's total negative pole.
  7. After finishing wiring, measure the voltage between B+ and B- and P+ and P-. These voltages should be equal.

3.2. Common Port Wiring Diagram

The following diagram illustrates the wiring for a common port configuration, where charging and discharging share the same port.

For LiFePO4 battery, the voltage should be between 2.0V – 3.6V. For LTO battery, it should be between 1.5V – 2.75V.

3.3. Component Overview

The BMS features a pure aluminum heat sink, heat dissipation silicone sheet, and a fully enclosed one-piece molding sealant for enhanced durability and protection.

4. Operation

The DALY DL16S BMS automatically manages your battery pack to ensure safe and efficient operation. Once correctly installed, it continuously monitors various parameters.

4.1. Automatic Protection Functions

• **Over Charge Protection:** Prevents individual cells from being charged beyond their safe voltage limit, protecting against damage and extending battery life.
• **Over Discharge Protection:** Stops discharge when cells reach their minimum safe voltage, preventing irreversible damage.
• **Over Current Protection:** Limits the current drawn from the battery during discharge to prevent overheating and damage to the BMS and battery.
• **Short Circuit Protection:** Immediately cuts off power in the event of a short circuit, safeguarding the battery and connected equipment. Long-term short circuits will not affect the PCB or battery.
• **Temperature Protection:** Monitors battery temperature during both charging and discharging, activating protection if temperatures exceed safe operating limits. The mechanical temperature sensor enhances safety by preventing thermal runaway.
• **Balance Function:** Actively balances the voltage across individual cells in the battery pack, ensuring all cells are charged and discharged uniformly, which improves overall pack performance and longevity.

4.2. Applications

The DALY DL16S BMS is suitable for a wide range of lithium battery applications, including:

• Electric scooters
• E-bikes
• Tourist sightseeing vehicles
• Electric tricycles
• Low-speed electric vehicles (EVs)
• Emergency UPS systems
• Solar street lights
• RV & Home energy storage systems

5. Maintenance

The DALY DL16S BMS is designed for durability and requires minimal maintenance. However, following these guidelines can help ensure its long-term performance.

• **Regular Inspection:** Periodically check all wiring connections for tightness and signs of wear or corrosion.
• **Cleaning:** If necessary, gently clean the exterior of the BMS with a dry, soft cloth. Avoid using liquids or abrasive cleaners.
• **Environmental Protection:** The BMS features a full sealed, waterproof, dustproof, and shockproof design (Patent No: ZL 2018 2 1243978.5). While robust, avoid submerging it in water or exposing it to excessive dust or impact.
• **Storage:** If storing the battery pack with the BMS for an extended period, ensure the battery is charged to a suitable storage voltage (typically around 50% charge) to prevent over-discharge.

6. Troubleshooting

If you encounter issues with your DALY BMS, refer to the following common problems and solutions.

If issues persist after following these steps, please contact DALY customer support for further assistance.

7. Specifications

The DALY DL16S BMS offers robust performance and protection features. Specific parameters vary by current rating (20A to 150A).

7.1. General Specifications

• **Model Number:** DL16S
• **Battery Series:** 16S
• **Applications:** 3.7V lithium battery rated (e.g., 18650 Li-ion)
• **Accessory Type:** Battery Accessories
• **Accessory:** Free cable included
• **Certification:** CE, FCC, RoHS, PSE
• **Charger included:** No
• **Battery Included:** No
• **High-concerned chemical:** None
• **Waterproof:** Yes
• **Temp. Sensor:** Yes (NTC)
• **Origin:** Mainland China

7.2. Product Parameters (Common Port)

Refer to the image above for detailed specifications including discharge current, charge current, inner resistance, overcharge protection, over-discharge protection, overcurrent protection, short circuit protection, temperature protection, self-consumption, and working temperature range for 20A, 30A, 40A, 50A, and 60A common port models.

7.3. Product Parameters (Separate Port)

Refer to the image above for detailed specifications including discharge current, charge current, inner resistance, overcharge protection, over-discharge protection, overcurrent protection, short circuit protection, temperature protection, self-consumption, and working temperature range for 80A, 100A, 120A, and 150A separate port models.

7.4. Physical Dimensions

Dimensions vary slightly by current rating. For example, 30A models are approximately 61mm x 80mm with a thickness of 12mm. Higher current models (e.g., 50A/60A) may have increased thickness (e.g., 16mm) due to larger components and heat sinks.

8. User Tips

• **Temperature Monitoring:** The integrated mechanical temperature sensor is a key safety feature. Ensure the BMS is installed in a location that allows for proper temperature sensing and heat dissipation.
• **Reliable Components:** DALY BMS units utilize high-quality (A-level) protective integrated circuit ICs, often from Seiko of Japan, ensuring reliable performance and a long cycle service life for your battery.
• **Heat Dissipation:** For higher current models, the robust heat sink design significantly aids in cooling, allowing for strong load ability and sustained discharge currents.
• **Wiring Verification:** Always double-check all wiring, especially balance leads and main power connections, before applying power. A multimeter can be invaluable for verifying correct voltages and continuity.

9. Warranty and Support

DALY provides a 3-year warranty for this product, reflecting their commitment to quality and continuous innovation.

For technical support, warranty claims, or any questions regarding your DALY BMS, please contact the seller or manufacturer directly. Ensure you have your purchase details and model number (DL16S) ready.