Application of Power Electronics and Control for Dual Battery Packs Management with Voltage Balancing and State of Charge Estimation — Oak Academic Publishing
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Application of Power Electronics and Control for Dual Battery Packs Management with Voltage Balancing and State of Charge Estimation
Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
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Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
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Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
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Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
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Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
1 Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
2 Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
3 Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
4 Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
5 Department of Electrical and Electronics Engineering, University of Buea, Buea, Cameroon
Energy storage, such as lead acid batteries, is necessary for renewable energy sources’ autonomy because of their intermittent nature, which makes them more frequently used than traditional energy sources to reduce operating costs. The battery storage system has to be monitored and managed to prevent serious problems such as battery overcharging, over-discharging, overheating, battery unbalancing, thermal runaway, and fire dangers. For voltage balancing between batteries in the pack throughout the charging period and the SOC estimate, a modified lossless switching mechanism is used in this research’s suggested battery management system. The OCV state of charge calculation, in the beginning, was used in conjunction with the coulomb counting approach to estimate the SOC. The results reveal that correlation factor K has an average value of 0.3 volts when VM ≥ 12 V and an average value of 0.825 when VM ≤ 12 V. The battery monitoring system revealed that voltage balancing was accomplished during the charging process in park one after 80 seconds with a SOC difference of 1.4% between Batteries 1 and 2. On the other hand, the system estimates the state of charge during the discharging process in two packs, with a maximum DOD of 10.8 V for all batteries. The project’s objectives were met since the BMS estimated SOC and achieved voltage balance.
KeywordsState of ChargeBattery Management SystemLead Acid Battery
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