Effective Power Management System for E-Vehicle

Abstract: Battery management systems (BMS) are used in electric vehicles to monitor and control the charging and discharging of rechargeable batteries, making operation more economical. The battery management system ensures that the battery remains safe and reliable and its performance is increased without it entering a harmful state. Various monitoring techniques are used to monitor the battery's condition, voltage, current, and ambient temperature. Various analogue/digital sensors with microcontrollers are used for monitoring. This paper deals with the state of charge, state of health, state of life and maximum capacity of a battery. By reviewing all these methods, future challenges and possible solutions can be identified. With the rapidly developing technology of smart grid and electric vehicles, battery has emerged as the most important energy storage device that attracts much attention. It is equally important to improve the performance of the battery management system (BMS) to make the battery a safe, reliable and cost-effective solution. The special features and requirements of the smart grid and electric vehicles, such as deep charge/discharge protection and accurate state of charge (SOC) and state of health (SOH) estimation, increase the need for a more efficient BMS. The BMS should include accurate algorithms for measuring and estimating the functional state of the battery while being equipped with advanced mechanisms to protect the battery from hazardous and inefficient operating conditions.

Keywords: BMS, SOC, SOH, Temperature.