4S-100A LiFePO₄ (LFP) BMS — DALY Model

Overview

The DALY 4S-100A BMS is designed for 4-series LiFePO₄ battery packs, supporting continuous current up to 100A. It offers comprehensive battery protection and balancing functions to maximize battery safety and longevity.

Specifications

• Cell Configuration: 4S (4 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: ~12.8V (3.2V nominal per cell × 4)

• Maximum Continuous Current: 100A

• Peak Current: Higher for short bursts (typically up to 150A, model dependent)

• Balancing: Passive balancing of individual cells

• Balance Current: Typically 30mA to 100mA

• Protections:

  • Over-voltage protection

  • Under-voltage protection

  • Over-current protection

  • Short-circuit protection

  • Temperature protection (over and under temperature)

• Communication:

  • Optional Bluetooth or CAN interfaces available on some models

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

Features

• Real-time monitoring of individual cell voltages

• Automatic passive cell balancing during charging

• Safety cutoffs for battery and user protection

• Compact and robust design suitable for high current applications

• Optional communication modules for remote monitoring

Applications

• Electric bikes and scooters

• Solar energy storage and backup systems

• Portable power banks and stations

• DIY LiFePO₄ battery pack projects

Important Notes

• Compatible only with LiFePO₄ chemistry — do not use with other battery types.

• Proper wiring of all balance leads and main terminals is essential.

• Adequate cooling or ventilation may be required during continuous high current use.

• Ensure your charger and load do not exceed the 100A continuous rating.

• DALY BMS models may support firmware updates and Bluetooth app monitoring—check your specific model details.