• Ms. Kuncham Chaitanya
• T.Bhargavi

Electric vehicles (EVs) require an onboard battery charger unit and a battery management system (BMS) unit that balances the voltage levels for each battery cell. Thus, the proposed circuit utilises two functions in one and therefore eliminates the need of having two autarkic units reducing complexity and reduction in component count. Battery equalization, aiming at keeping the state of charge of inside cells in the same level, is of great importance to maximize the capacity of the whole battery pack and keep cells away from overcharge and over discharge damage. In this paper, based on the analysis of bi-directional converter, we have proposed a fuzzy controller to adaptively tune the equalizing current. The inputs of fuzzy controller are selected as the difference in state of charge, the average of state of charge and the total internal resistance. The overall performance of the proposed equalizer is evaluated by multi-indexes such as equalizing speed, efficiency and cell protection. The proposed circuit operates as a flyback converter and achieves power factor correction during battery charging. The constant‐current constant‐voltage (CC–CV) charging method is employed to charge the batteries. However, to limit the number of sensors that will be employed as a result of varying cells during charging. The battery current is estimated using a single current transducer and embedding a converter model in the controller. The operation of the circuit is presented in detail and is supported by simulation results.

Electric vehicles (EVs), fuzzy controller, constant‐current constant‐voltage (CC–CV), power factor correction .

"BATTERY CELL EQUALIZATION WITH THE FUZZY CONTROLLER IN THE ELECTRIC VEHICLE BATTERY CHARGING STATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 2, page no.f735-f740, February-2025, Available :http://www.jetir.org/papers/JETIR2502592.pdf

"BATTERY CELL EQUALIZATION WITH THE FUZZY CONTROLLER IN THE ELECTRIC VEHICLE BATTERY CHARGING STATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 2, page no. ppf735-f740, February-2025, Available at : http://www.jetir.org/papers/JETIR2502592.pdf