Low Voltage Battery Management System with Internal Adaptive Charger and Fuzzy Logic Controller

Omer Faruk Goksu, Ahmet Yigit Arabul and Revna Acar Vural
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Omer Faruk Goksu: Department of Electrical and Electronics Engineering, Fatih Sultan Mehmet Vakif University, Istanbul 34445, Turkey
Ahmet Yigit Arabul: Department of Electrical Engineering, Yildiz Technical University, Istanbul 34220, Turkey
Revna Acar Vural: Department of Electronics and Communications Engineering, Yildiz Technical University, Istanbul 34220, Turkey

Energies, 2020, vol. 13, issue 9, 1-15

Abstract: Lithium ion (Li-Ion) and lithium polymer (Li-Po) batteries need to be used within certain voltage/current limits. Failure to observe these limits may result in damage to the battery. In this work, we propose a low voltage battery management system (LV-BMS) that balances the processes of the battery cells in the battery pack and the activating-deactivating of cells by guaranteeing that the operation is within these limits. The system operates autonomously and provides energy from the internal battery. It has a modular structure and the software is designed to control the charging and discharging of eight battery cells at most. A STM32F103 microcontroller is used for system control. The fuzzy logic controller (FLC) is used to set the discharge voltage limit to prevent damage to the battery cells, shorten the settlement time and create a specialized design for charge control. The proposed structure enables solar panel or power supplies with different voltage values between 5 V and 8 V to be used for charging. The experimental results show there was a 42% increase in usage time and the voltage difference between the batteries was limited to a maximum of 65 mV. Moreover, the charge current settles at about 20 ms, which is a much faster response when compared to a PID controller.

Keywords: battery chargers; battery management systems; fuzzy logic control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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