20S-40A LiFePO₄ (LFP) BMS — DALY Model

Overview
The DALY 20S-40A BMS is designed for 20-cell LiFePO₄ battery packs connected in series, with a nominal voltage of 64V. It supports continuous current up to 40A and provides comprehensive protection, passive balancing, and optional smart communication features.

Specifications

• Cell Configuration: 20S (20 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: 64V (3.2V × 20)

• Maximum Continuous Current: 40A

• Peak Current: Typically 60A to 80A (short bursts)

• Balancing Type: Passive balancing

• Balance Current: Approximately 30mA to 100mA

• Protection Features:

  • Over-voltage protection

  • Under-voltage protection

  • Over-current protection

  • Short-circuit protection

  • Over-temperature protection

  • Under-temperature protection

• Communication (model dependent):

  • Bluetooth

  • UART

  • CAN

• Operating Temperature Range: -20°C to +60°C

Features

• Individual cell voltage monitoring and balancing

• Automatic passive cell balancing during charging

• Full safety protections for voltage, current, and temperature

• Optional Bluetooth support for remote monitoring (model dependent)

• Durable and compact design for mid-power battery systems

Applications

• 64V nominal LiFePO₄ battery packs

• Electric vehicles such as e-bikes, scooters, and light EVs

• Solar and off-grid energy storage systems

• Backup power supplies and portable battery packs

• DIY 20S LiFePO₄ battery projects

Important Notes

• Suitable for LiFePO₄ batteries only (3.2V nominal per cell)

• Proper wiring of balance leads and main terminals is essential

• Charger and load currents should not exceed 40A continuous rating

• Bluetooth and smart features available on specific BMS models

• Adequate cooling recommended under heavy continuous loads