Current Stabilisation of Lithium Polymer Electric Vehicle Battery Using Fuzzy Logic Control

Abstract

Renewable energy in electric vehicles (EVs) is crucial and requires careful consideration. To determine the initial capacity of lithium polymer batteries used in electric vehicles development, the batteries must be tested under various load and discharge conditions. These procedures involve monitoring battery voltage, current, and temperature during discharge with a 5-watt lamp load. The results of the study demonstrate that fuzzy control is an effective method to minimize the increase in battery temperature by stabilizing the current used by the battery.  The fuzzy control system effectively regulates the battery with a capacity of 3300 mAh and a voltage of 11.1 Volts, maintaining a stable current of 0.3 A from the 3rd minute until the battery reaches its maximum capacity at 63 minutes. Fuzzy control delays the battery's temperature rise by approximately 14 minutes compared to a system without it. Temperature rise significantly affects the discharge speed of lithium polymer batteries.