Aristiawan, Izanara Gavin (2024) Studi Eksperimen dan Simulasi Perbandingan Panas Bangkitan sebagai Fungsi Waktu dengan Kondisi Aktual pada Baterai Lithium-Ion dengan Pendinginan Phase Change Material. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baterai lithium-ion memiliki peran penting dalam era elektrifikasi global dikarenakan memiliki kepadatan energi yang tinggi. Pengeluaran energi pada baterai lithium-ion tidak selalu terjadi secara konstan, pengeluaran energi yang berfluktuasi dapat berpengaruh terhadap panas bangkitan pada baterai lithium-ion. Panas yang terlalu tinggi dapat memberi efek negatif seperti penurunan performa hingga kegagalan baterai. Penambahan sistem pendinginan seperti phase change material dapat membantu pengondisian temperatur baterai. Penelitian ini dilakukan untuk memahami karakteristik pengeluaran tegangan, karakteristik panas bangkitan pada baterai lithium-ion, mengetahui bentuk fungsi waktu yang dapat mendeskripsikan karakteristik panas bangkitan pada baterai lithium-ion serta pengaruh PCM dalam menjaga temperatur baterai. Baterai lithium-ion berukuran 18650 beserta PCM parafin sebagai pendingin akan digunakan sebagai objek eksperimen dan simulasi. Eksperimen dilakukan dengan melakukan pengujian discharge pada baterai dengan variasi pembebanan 0.9 A, 2.4 A, 4.5 A, 7.5 A dan 10.5 A. Temperatur permukaan baterai terus diukur selama pengujian discharge berlangsung. Baterai diletakkan di dalam sterofoam box selama pengujian untuk mengurangi efek dari lingkungan. Hasil eksperimen menunjukkan bahwa penambahan PCM mulai diperlukan sejak pembebanan 4.5 A dan sangat penting pada pembebanan 10.5 A, dikarenakan temperatur baterai yang sudah berada di ambang batas temperatur optimal yaitu 40°C pada 4.5 A dan melewati batas temperatur operasional yaitu 60°C pada 10.5 A. Baterai mencapai temperatur maksimal 33.1°C, 37.1°C, 45°C, 56.4°C dan 73.7°C berturut-turut dari pembebanan 0.9 A hingga 10.5 A. Penambahan PCM dapat menurunkan temperatur permukaan baterai menjadi 32°C, 35.5°C, 40°C, 45°C dan 50.7°C berturut-turut. Data tegangan dari eksperimen digunakan untuk menghitung nilai panas bangkitan baterai menggunakan persamaan Bernardi. Nilai panas bangkitan yang dihasilkan dapat dimodelkan menjadi dua bentuk fungsi waktu yaitu linear dan polinomial orde 3. Hasil dari simulasi menunjukkan bahwa dari kedua bentuk fungsi waktu, fungsi linear memberikan karakteristik termal yang lebih akurat dengan nilai RMSE sebesar 3.11°C untuk seluruh rentang waktu hasil perhitungan.
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Lithium-ion batteries have an important role in the era of global electrification because of the high energy density. Energy output in lithium-ion batteries does not always occur constantly, a fluctuating energy output can affect the heat generation in lithium-ion batteries. Too much heat might have negative effects such as reduced performance or even battery failure. The addition of a cooling system such as phase change material can help maintaining the battery temperature. This research was conducted to understand the characteristics of voltage output, the characteristics of heat generation in lithium-ion batteries, to find out the form of the time function that can describe the characteristics of heat generation in lithium-ion batteries and the influence of PCM in maintaining battery temperature. An 18650 lithium-ion battery along with paraffin PCM as a cooling system will be used as experimental and simulation objects. Experiments were carried out by carrying out discharge tests on batteries with current load variations of 0.9 A, 2.4 A, 4.5 A, 7.5 A and 10.5 A. The surface temperature of the battery was continuously measured during the discharge test. The battery was placed in a styrofoam box during testing to reduce environmental effects. The experimental results show that the addition of PCM begins to be needed from a load of 4.5 A and is very important at a load of 10.5 A, because the battery temperature is already at the optimal temperature threshold, namely 40°C at 4.5 A and has passed the operational temperature limit, namely 60°C at 10.5 A. The battery reaches a maximum temperature of 33.1°C, 37.1°C, 45°C, 56.4°C and 73.7°C respectively from current load 0.9 A to 10.5 A. The addition of PCM can reduce the battery surface temperature to 32°C, 35.5°C, 40°C, 45°C and 50.7°C respectively. The voltage data from the experiment is used to calculate the heat generation value of the battery using the Bernardi equation. The resulting heat generation value can be modeled into two forms of time function, namely linear and 3rd order polynomial. The results of the simulation show that of the two forms of time function, the linear function provides more accurate thermal characteristics with an RMSE value of 3.11°C for the entire calculated time range.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Heat Generation, Lithium-Ion Battery, Temperature, Baterai Lithium-Ion, Panas Bangkitan, Temperatur |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage. T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Izanara Gavin Aristiawan |
| Date Deposited: | 23 Aug 2024 08:20 |
| Last Modified: | 23 Aug 2024 08:20 |
| URI: | http://repository.its.ac.id/id/eprint/114516 |
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