Discharge analysis and temperature management of LiFePO4 battery pack for Electric Vehicles

Abstract

The Advancement in battery technology and need of pollution free machines rises the demand of electrical vehicles exponentially. The performance and cost of electrical vehicles are majorly relied on the battery pack used. Battery packs are available with numerous configurations of cells as per the energy demand of electrical system. The electrical cell has been undergoing in protentional research in term of material used and methods of arrangement in battery pack. Now a days, most of the electrical vehicles are preferred the Li-ion battery due to the high energy density and low self-discharge rate. The performance of Li-Ion battery depends on the load arrangement and temperature mainly, so proper discharge analysis and temperature management is needed. Present work includes the discharge analysis of LiFePO4 battery pack and develop a control unit, which managed the cell temperature under critical ranges and ensure safe operation. The configured battery pack 1P3S has been modelled on MATLAB-SIMULINK, and battery's performances were studied with the implementation of design control mechanism. The designed control unit is used to rheostat a power switch and cooling mechanism. A MOSFET is used as a power switch to regulate the discharging current through load, and ambient temperature is regulated by optimal use of cooling mechanism.