Charge equalisation of electric vehicle battery system using intelligent controller Online publication date: Fri, 03-Feb-2023
by Ginu Ann George; Fossy Mary Chacko; A. Prince; M.V. Jayan; P.R. Sunil Kumar
International Journal of Vehicle Design (IJVD), Vol. 89, No. 3/4, 2022
Abstract: Exhaust emissions from conventional vehicles adversely affect the environmental balance, thereby an enhanced adoption of electric vehicles (EVs) is required. Among the existing energy storage systems, rechargeable batteries, especially Li-ion battery, play a major role in the commercialisation of EVs due to its long cycle life, high energy and power density and low self-discharge. A novel state of charge (SOC) based modular cell balancing equaliser (CBE) scheme integrated with intelligent control techniques is proposed. The performance of CBE is analysed based on the simulation works done under Simulink MATLAB environment with series-connected modular Li-ion battery. The bidirectional non-dissipative CBE structure is combined with intelligent controller to balance the voltage among the cells considering the effect of SOC of each individual cell. The proposed balancing circuit and control method improve the speed of balancing accuracy without exceeding the upper voltage limit as evident from the simulation results.
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