Simulasi Bidirectional Flyback DC-DC Converter pada Sistem Charging dan Discharging Baterai Li-ion

Khoirul Erfanudin, Erfanudin (2025) Simulasi Bidirectional Flyback DC-DC Converter pada Sistem Charging dan Discharging Baterai Li-ion. Bachelor thesis, Institut Teknologi Kalimantan.

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Abstract

Teknologi baterai saat ini memegang peranan krusial dalam mendukung efisiensi penyimpanan energi, terutama pada aplikasi kendaraan listrik yang membutuhkan sistem manajemen daya yang andal dan efisien. Salah satu tantangan utama adalah pengendalian proses pengisian (charging) dan pengosongan (discharging) baterai li-ion agar tetap optimal pada berbagai kondisi tegangan dan kapasitas. Penelitian ini bertujuan menganalisis performa dan respons sistem bidirectional flyback DC-DC converter dengan metode pengendalian constant voltage (CV) dan variasi duty cycle, khususnya dalam konteks pengisian dan pengosongan baterai li-ion. Simulasi dilakukan menggunakan matlab simulink untuk mengevaluasi pengaruh duty cycle terhadap kestabilan tegangan, arus, serta perubahan state of charge (SOC) pada berbagai level tegangan (3,7 V, 12 V, dan 24 V) dan kapasitas baterai. Hasil simulasi menunjukkan bahwa sistem mampu mengontrol tegangan dan arus secara efektif pada tegangan menengah dan tinggi, dengan error tegangan relatif rendah, yaitu 3,83% pada 12 V dan 7,54% pada 24 V, serta overshoot kecil sebesar 0,5% pada mode boost. Namun, pada tegangan rendah 3,7 V, error tegangan meningkat signifikan hingga 29,02% dan efisiensi pengisian menurun pada kapasitas baterai yang besar. Selain itu, perubahan SOC selama proses pengisian dan pengosongan menunjukkan konsistensi dengan karakteristik sistem, meskipun laju pengisian melambat pada kapasitas besar. Secara umum, penggunaan duty cycle konstan 50% pada bidirectional flyback DC-DC converter terbukti efektif untuk aplikasi pada tegangan menengah dan tinggi, namun diperlukan optimasi lebih lanjut pada tegangan rendah dan kapasitas besar untuk meningkatkan efisiensi serta kestabilan sistem penyimpanan energi berbasis baterai.

Item Type: Thesis (Bachelor)
Subjects: T Technology > T Technology (General)
Divisions: Jurusan Teknologi Industri dan Proses > Teknik Elektro
Depositing User: Khoirul Erfanudin
Date Deposited: 11 Jul 2025 01:39
Last Modified: 11 Jul 2025 01:39
URI: http://repository.itk.ac.id/id/eprint/23340

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