Investigation of The Effect of Different PCM Type and Thickness on Battery Thermal Performance

Altan S., Gökaslan M. Y.

İstanbul Internatıonal Contemporary Scıentıfıc Research Congress -VII, İstanbul, Türkiye, 1 - 03 Temmuz 2025, cilt.1, ss.1, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.1
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

Lithium-ion batteries are increasingly used in many areas of our lives. While the battery management system is used to protect the features of lithium-ion batteries such as charge cycle and capacity, the battery thermal management system is used to prevent high temperatures from affecting the internal structure. Active, passive and hybrid cooling methods are used depending on the operating environment and capacity of the battery. In this study, the thermal performance of the battery cell in different phase change material (PCM) types and thicknesses is investigated experimentally. In the experiments, two different PCMs with 35 ℃ and 42 ℃ melting temperatures and 1, 2 and 4 mm FCM thickness are examined. The experiments are carried out at five different discharge rates from 1C to 5C, and the ambient temperature was laboratory temperature, which was approximately 19 ℃. In the experiments, two different battery surface temperatures, one PCM temperature and one battery box outer temperature are measured. At 1C discharge current, the battery surface temperatures in both PCM types and thicknesses are almost at close values. As the discharge current increases, the PCM melting at 35 ℃ shows better performance and the battery temperature in this phase change material is lower at the same PCM thickness. The battery temperatures in the same type of PCM with 1 and 2 mm thickness are quite close. In both PCM types with 4 mm PCM thickness, the battery temperatures exhibited the lowest battery temperatures compared to the other thicknesses. In both PCM types, the phase changed at 3C, 4C and 5C and the liquid phase passed. At the highest discharge current, the battery temperature is 65 ℃ for 1 and 2 mm, while it is 55 ℃ for 4 mm. As expected, the PCM temperatures are at the lowest PCM thickness and 60 ℃. In these experimental combinations, the best thermal performance is seen in the battery with a melting temperature of 35 ℃ and a 4 mm PCM thickness. When these two PCM types are examined, it is seen that the PCM type do not have much effect, but the effect of the PCM thickness on the battery thermal performance is quite high.