17S-40A LiFePO₄ (LFP) BMS — DALY Model

Overview
The DALY 17S-40A BMS is designed for battery packs with 17 LiFePO₄ cells connected in series. It supports continuous currents up to 40A and includes essential protections, passive balancing, and optional smart communication features.

Specifications

• Cell Configuration: 17S (17 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: 54.4V (3.2V × 17)

• 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

• Real-time monitoring of individual cell voltages

• Automatic passive cell balancing during charging

• Comprehensive protection for voltage, current, and temperature

• Optional Bluetooth monitoring with DALY Smart BMS app

• Compact and durable design for mid-power applications

Applications

• 54V nominal LiFePO₄ battery systems

• Electric scooters, e-bikes, and light EVs

• Solar and off-grid energy storage

• Portable power stations and UPS

• DIY 17S battery projects requiring reliable management

Important Notes

• Designed exclusively for LiFePO₄ (3.2V per cell) chemistry

• Balance leads and power connections must be wired correctly

• Charger and load must be within the 40A continuous current limit

• Bluetooth and other smart features depend on model version

• Cooling or ventilation may be required during high current operation