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Assessment of AEKF SoC Estimation in a LiFePO₄ Battery System with Relay Switching Control Imam Hidayat Usman; Syafii Syafii; Novizon Novizon; Aulia Aulia
PROtek : Jurnal Ilmiah Teknik Elektro Vol 13 No 2 (2026): Protek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v13i2.11204

Abstract

This study implements an Adaptive Extended Kalman Filter (AEKF) for real-time state of charge (SoC) estimation to support charge–discharge regulation in a LiFePO₄ battery system integrated with photovoltaic (PV) generation. Due to the variability of PV output, accurate and stable SoC estimation is essential for ensuring reliable battery operation. A first-order equivalent circuit model (1RC ECM) is employed to represent battery dynamics based on measured current and terminal voltage. The proposed AEKF algorithm is implemented on a Raspberry Pi 5 to enable real-time computation, and the estimated SoC is directly used as the control variable in a dual-relay switching mechanism to regulate charging and discharging processes. Experimental results show that the proposed method achieves a Mean Absolute Error (MAE) of 1.24% and a Root Mean Square Error (RMSE) of 1.58%, which are both below the 5% target specified in the system design. The system successfully maintains the battery within a safe SoC range of 57.5% to 85.2%, while ensuring stable relay operation without chattering under dynamic load and charging conditions. These results demonstrate that the proposed AEKF-based approach provides accurate, stable, and practical SoC estimation, making it suitable for real-time battery management in small-scale energy storage applications.
Co-Authors . Darwison A. A. Abd Jamil Abdul Manab Abdul Rajab Abdul-Malek, Z. Abdul-Malek, Zulkarnain Abdullah, Oirunisa Abral, Hairul Achmad Noerkhaerin Putra Achmad Soeharto Adibrata, Sudirman Ahmad, M. H Ahmaniyah, Ahmaniyah Akbar, Sidderatul Akbar Aldi Pratama Putra Alfajri, Roan Alfi Purnamasari Alifya, Fadya Allo, Karmila Pare Alpradisa, Hafiz Amalia, Frida Amirul Luthfi Amri, Ikhwan Ananda, Restu Patria Angelia, Fera Anggi, Anggi Anggraini, Nadilla ani ani Animah Animah Annisa, Mafazan Nuha Anshari, Zaim Ariadi Hazmi Arisda Candra Satriawati Arisda Candra Satriawati Asdar Asdar Asdi, Asdi Asra, Yunelly Asriati Asriati, Asriati Asy-Syifa, Samratul Asy-Syifa, Shafa Rifda ATIKA RAHMAWATI Aulia Zarrah, Nisa Aulia, Anisa Rizki Awang, N. A. Azis, Agung Putra Azizah, Debby Husna Nur Bahtiar Zulham Baiq Yuni Wahyuningsih Bakhtiar, Rakhman Batubara, Saiful Bayu Sudrajat Budianti, Nur Rahmi C. L. G. Pavan Kumar Charismatica, Mutiara Christoporus, Christoporus Dali, Meilina Widya Danastri, Ajeng Dwi Retno Ambar Dania, Reiska Rahma Danil, Irma Rahma Desi Erawati, Desi Dessy Pranungsari Dewi Purboningsih Dewi, Avela Dewi, Nurul Kemala Dian Ika Puspitasari Diawita, Milenia Dina Dwi Nuryani Dukalang, Tiara Tri Wardani Dwi Edi Wibowo Dwi Gustiono Dwirainaningsih, Yustiana Dwi E. P. Waldi Eka Putra Waldi Elisa, Lia Erfan, M.Pd, Muhammad Erita Yuliasesti Diah Sari Erma Ariyani Ermawati, Diyan Fahmi, Iqbal Faisyal Razak Fajar, Masyhuril Fathur Rahman fatliani, nurul fatliani Fauzi, Muhammad L. Firman syah, Firman Fuadillah, Muhammad Nur Gusvita Widia Hakim, Noman Hamadi, Sarah Amalia Hamidah, Annisaul Hariadi, Madjumsyah Hasan, Nur Fadhila Hasnawati Hasnawati Hasriani Hasriani, Hasriani Hafifah, Tasya Husain, Ahmad Fauzan Husna, Aufa Rusydina Husni Mubarak Husnul Khatima, Husnul Ibrahim, Siti Fadilla Ilhamdi Rusydi, Muhammad Imam Hidayat Usman Imron Rosyadi Insirat, Mutahira Nur Irawan, Dwi Bagus Izul Arob Jambak, M. I. Jesiska, Adella Junaldi Junaldi Kamila, Muna Karno . Karno, Ahmad khusnul khotimah Koesmantoro, Hery Lilis, Lilis Lovita, Wiwin Lubis, Tiffani Tantina Lukman, Dafria Naila Luthfi , Rizkia Sabrina M Hidayat M. A. B. Sidik M. A. B. Sidik M. A. Hafizi M. H Ahmad M. H. Ahmad M. Heru Setiawan M. Hidayat M. I. Jambak M. I. Jambak M. Nur Iman Ridwan Maemonah, Maemonah Manik, Nadia Putri Manurung, Muhammad Fajar Ruhud Marsuni, Nur Sandi Maulana Widi Andrian Maulana, Hutomo Atman Maya Panorama, Maya Mayang Safira Melda Latif Mohd Hafizi Ahmad Mondrizal Mondrizal Muh. Rezky Risandi Muhammad Erfan, Muhammad Muhammad Fajar Ruhud Manurung Muhammad Habiburrahman Muhammad Kodrat Muhammad Nur Muhammad Taufiq Muhammad Yusuf MUHAMMAD YUSUF Mumuh Muharam Muna, Nailatul MUSOLI, MUSOLI Musthofa, M Bahri Mustikadewi, Annisa Widya N. A. Awang Nailiy Huzaimah Najiya, Izza Nawawi, Z. Niken Wahyu Hidayati Nissa Tarnoto Noviza, Neza Novizon, Novizon Nur Izrillah, Imra Nurfadila NURUL HIDAYAH Nurul Hikmah Nirwan NURUL KHOTIMAH Nurweni, Susi Ogah, Ogah Anselm Pamungkas, Mahesa Angel Pasigai, Moh. Aris Paskalina Aprila Tiy Perdana, Daviddefikry Yondra Pramesti, Narindra Maura Pratama, Muhammad Raditya Pratiwi, Anggelia Nurtasbita Prayoga, Rido Ade Primanita, Yanna Prismadanu, Aliffathur Puput Kurnia Sari Purnamasari, Ariska Putra, Dimas Brian Adi Putri, Rina Mala Raden Ayu Umikalsum Rafli Aldiansya, M. Rahmadani, Khoirunnisa Rizki Rahmawati, Rahmawati Ramadhani, Myca Mitha Rani, Indah Septia Ratna Indriyani Razak, Faisyal Ricky Maulana Rifda, Rifda Rina Rina Riska, Ahmad Rita Rahmaniati Roan Alfajri Rokim, Mohammad Romadhoni, Buyung Ruliaty Ruliaty, Ruliaty Safnah, Safnah Sahputra, Hendra Sahrain, Nuraisya Salahuddin Salahuddin Salman Al Farisi Salmiwati, Salmiwati Sami'an, Sami'an Sami’an, Sami’an Samson, Deistia Amelia Samudra, Rosiani Sandi, Aldi Prawira Sanjaya, Jimmy Sari, Ayu Kurnia Sari, Selvi Novia Saroh, Ummu Sarwan, Sarwan Sawaliah, Nuri Nadirah Sayyidana, Zahra Ahla Septiantika, Dewi Fortuna Sherry Edelia Natsir Kalla Sidik, M. A. B. Sidiq, Faiq Ja'far Siti Assa’adah Siti Istiningsih, Siti Sitti Sarti Sri Yunita Suraida Salat Sugiannor Sugiannor Suharto, Achmad Sulaiman Sulaiman Suliyanto, Eko Sumarkondi, Mohammad Devano Syafii . Syafitri, Windah Nur Syahputri, Melviana Syazali, Muhammad Syukri Arief Syukri Yunus Syukrianza, Muh. Taufik, Taufik Arbain Taufiqurohman, A. H. As’ari Tesya Uldira Septiyeni Triantoro Safaria Trisylvana Azwari Umah, Kuntum Khairah Untung Nopriansyah Usman, Ainun Wafa, Zaenal Waldi, E. P. Waweru Njeri Widia, Gusvita Wikurendra, Edza A. Yanti, Dhiny Ester Yanuar Zulardiansyah Arief Yanuar Zulardiansyah Arief Yanuar Zulardiansyah Arief Yosie Saputri, Maharani Octavia Yulia Wardita Yulianti, Kartika Dewi Yusnadi Yusril, Muh. Z. Abdul-Malek Z. Nawawi Z. Nawawi Zahrah, Yulia Zahrotunnisa', Mutamimah Zaini, Zaini Zainuddin, Zainuddin Zulaikha, Nur Zulfa, Anis Suhaila Zulkarnain Abdul Malek Zulkarnain Abdul-Malek Zulkurnain Abdul-Malek