Design of Management System for LiFePO4 Power Batteries Group

摘要

Lithium iron phosphate (LiFePO4) power battery must be in series in electric vehicle. At present, LiFePO4 power battery management system is only test and control of the total power batteries group voltage. There may be single power battery overcharge and over discharge, thus affecting the power battery life. This paper proposes a novel design methodology of LiFePO4 power batteries group management system, each section of the power battery voltage and temperature will be tested, and use CAN communications to transfer data to the batteries group management system. Batteries group management system monitors and controls LiFePO4 power battery, and avoids power battery overcharge and over discharge. The reliability and practicality of LiFePO4 power batteries group management system design are testified by experiments, and finally obtain some crucial experimental parameters and outcomes.