Ada 3 keuntungan utama dari pengujian penuaan.
- Keuntungan pertama adalah membuat infiltrasi elektrolit menjadi lebih baik, sehingga kondusif bagi stabilitas kinerja baterai litium;
- Kedua, setelah penuaan zat aktif pada bahan elektroda positif dan negatif, beberapa efek samping dapat dipercepat, seperti produksi gas, dekomposisi elektrolit, dll., sehingga kinerja elektrokimia baterai litium dapat cepat. stabil;
- Yang ketiga adalah melakukan penyaringan secara konsisten terhadap paket baterai litium setelah penuaan selama jangka waktu tertentu. Setelah terbentuk, tegangan sel baterai menjadi tidak stabil, dan nilai terukurnya akan menyimpang dari nilai sebenarnya. Tegangan dan resistansi internal sel baterai yang menua lebih stabil, sehingga nyaman untuk menyaring baterai dengan konsistensi tinggi.
Baterai litium-ion, seperti semua baterai, rusak seiring waktu dan seiring penggunaan. Degradasi ini dapat menimbulkan sejumlah dampak negatif, seperti berkurangnya kapasitas, meningkatnya hambatan internal, dan berkurangnya kemampuan menghantarkan arus tinggi. Oleh karena itu, penting untuk memahami bagaimana perilaku baterai tertentu seiring bertambahnya usia sehingga kinerjanya dapat diprediksi dan dikelola dengan tepat.
One of the primary reasons for conducting an aging test on a lithium-ion battery is to determine its capacity fade rate. Capacity fade is the decrease in a battery's ability to store and deliver energy over time. This can be caused by a number of factors, such as the accumulation of defects in the battery's active materials, the formation of a solid electrolyte interface (SEI) on the surface of the electrodes, and the loss of electrochemically active material through processes such as lithium plating. By measuring the capacity of a battery at regular intervals over its lifetime, it is possible to determine how quickly its capacity will fade and how much capacity will be lost at a given point in time.
Another important reason for conducting an aging test is to understand how a battery will behave under different operating conditions. For example, a battery's capacity fade rate may vary depending on factors such as the temperature at which it is used, the depth of discharge, and the rate at which it is charged and discharged. By testing a battery under a range of different conditions, it is possible to identify the conditions that are most likely to cause degradation and to develop strategies for minimizing the effects of aging.
In addition to capacity fade and performance under different operating conditions, an aging test can also provide information about other aspects of a battery's behavior. For example, an aging test can be used to determine a battery's impedance, which is a measure of the resistance it presents to the flow of electric current. This is important because a battery with high impedance will have a lower ability to deliver high currents, which can be a problem in applications such as power tools and electric vehicles. By measuring impedance, it is possible to identify batteries that are likely to perform poorly under high-current conditions and to develop strategies for improving their performance.
Another factor that can be determined through an aging test is a battery's calendar life, which is the length of time that a battery can be stored without significant loss of capacity. Calendar life is important because many applications require batteries to be stored for extended periods before they are put into use. By testing the calendar life of a battery, it is possible to determine how long it can be stored without losing significant capacity and to develop strategies for maximizing its useful life.
Secara keseluruhan, uji penuaan merupakan alat penting untuk memahami perilaku baterai lithium-ion dari waktu ke waktu. Dengan memberikan informasi tentang kapasitas yang memudar, kinerja dalam kondisi pengoperasian yang berbeda, impedansi, masa pakai kalender, dan karakteristik penting lainnya, uji penuaan dapat membantu produsen dan pengguna mengoptimalkan kinerja baterai dan memperpanjang masa pakai baterai mereka.