LITHIUM-ION BATTERY PACK AND BATTERY MANAGEMENT SYSTEM FOR AN ELECTRIC VEHICLE

Abstract

Environment pollution is increasing due to the very large number of gasoline-powered vehicles present today. To reduce environmental pollutions and Energy crisis electric and hybrid electric vehicles are very beneficial. Electric vehicles are powered by traction motor or electric motor (AC or DC) powered by the battery through the electric converter. Different types of batteries are available to power the electric vehicle like lead-acid, lithium-ion, lithium-polymer etc. Most suitable battery chemistry for electric vehicles is lithium-ion because of its discharge characteristics, high energy density, and low self-discharge etc. Despite its overall advantages lithium-ion batteries have some disadvantages. These batteries require a protection and monitoring system to operate battery in a “safe operation area”. Proposed Battery management system [1] has functions such as charging and discharging control, cell balancing, SoC monitoring, and thermal management and control of the battery and BMS