TIDT442 April   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
  6. 2Testing and Results
    1. 2.1 State of Charge(SOC)
    2. 2.2 Battery Stack Voltage and Charge and Discharge current
    3. 2.3 SoC With Battery Voltage and Charge and Discharge Current
  7. 3Waveforms
    1. 3.1 Overcurrent Protection During Charge
    2. 3.2 Overcurrent Protection During Discharge
    3. 3.3 Cell Undervoltage Protection
    4. 3.4 Cell Overvoltage Protection

Description

This reference design measures high cell voltage accuracy for 10s to 16s LiFePO4 battery packs. The reference design consists of a high accuracy battery monitor-protector, a gas-gauge, a secondary protection device, and an M0 to help program and communicate with the other devices. The design monitors each cell voltage, pack voltage, and pack current to protect the LiFePO4 battery pack against cell overvoltage, cell undervoltage, and charge and discharge overcurrent. The gauge accurately predicts the capacity and life of the battery pack. The design adopts high-side N-channel metal-oxide semiconductor field-effect transistor (MOSFET) architecture and has strong driving on and off capability.