COMPUTATIONAL MODEL OF A BATTERY AND SIMULATION OF CHARGE AND DISCHARGE PROCESSES

Electrical and Electronics Engineering

The battery is an ever-present equipment in any electrical system even though the purpose of its application is different from one system to another. He serves as a main power supply for an electronic device or a secondary power source to avoid power shortage in uninterruptible power supply, or an energy storage for the renewable energy generator. Due to the non-uniqueness of its application, obtaining a flexible model of a battery is of interest in order to ease its integration with any system. The present work is devoted to this purpose. The modeling method is based on the combination of the electrochemical governing law and the Thevenin electrical model. An algorithm-based simulation is then developed. This in order to visualize the evolution of the open circuit voltage and the state of charge evolution during charge and discharge process of a battery. As the theory suggest, it is noticed that the open circuit voltage is linked with the remaining capacity. The future work is to model the rate of change of the capacity toward a given charging voltage waveform. This in order to optimize the charging process.

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