The research team said that the advanced technique developed enables accurate estimation of state of charge, one of the most important internal aspects of a battery.

A team of researchers from the Indian Institute of Technology-Guwahati (IIT-G) has developed a technique for enhancing the performance of rechargeable lithium-ion batteries used in electric vehicles (EVs).

The advanced technique makes it possible to accurately estimate the state of charge (SOC), one of the most important internal aspects of a battery, said the team at the institute’s electronics and electrical engineering department. .

The research of Professor Somanath Majhi, Associate Professor Sisir Kumar Nayak and researcher Gautam Sethia has been published in IEEE Transactions on Circuit and System I: Regular Papers, a scientific journal.

The SOC indicates the remaining charge that can be removed from a battery before it is fully discharged. “Knowing the remaining capacity makes it possible to optimize the use of a battery’s capacity, avoid overcharging and underloading, increasing its lifespan, reducing costs and ensuring the safety of the battery and its environment, ”said Professor Majhi.

Lithium-ion batteries are preferred in cell phones and laptops for their low carbon emission, high energy density, low self-discharge rate, and low maintenance cost. They are also widely used in electric vehicles, integrated smart grids and micro-grids of renewable energy sources.

“Electric vehicles are becoming the most suitable alternatives to conventional fossil fuel-based vehicles. The battery is the main source of energy for electric vehicles. Accurate estimation of SOC which cannot be measured directly by any sensor is essential for their efficient functioning, ”said Prof Majhi.