Investigation of passive method in thermal management of lithium-ion batteries at different discharge rates by changing the number of cavities containing phase change materials

In this paper, the thermal management (TLMT) of plate lithium-ion battery packs (LIBP) was investigated using the passive method (using phase change materials). For this purpose, PCM-filled packages with LIBP were simulated. Maximum temperature (TE-Max), minimum temperature (TE-Min), and volume fraction of PCM (VOFPCM) melt were investigated as results. This study is transient and has been performed for three charge and discharge rates 1c, 1.5c, 2c. The number of packages in the battery pack was increased from one to fifteen by modifying the PCM package within the battery pack, allowing the impact of this sort of packing to be evaluated. The finite element method was used for simulation. The results of this study showed that increasing the number of PCM packages reduces the TE-Max of the battery. Also, increasing the number of PCM packages has caused the TE-Min of the battery to decrease in the early times, but at higher times, the TE-Min of the battery should increase, which causes better temperature uniformity on the battery. The greater the number of PCM packages, the shorter the complete melting time of the PCM. Increasing the charge and recharging rate of the battery also causes both the TE-Min and TE-Max of the battery to increase. Also, increasing the charge and recharging rate of the battery from 1c to 2c will cause you to have more molten PCM at constant times.

Automated summary

In this study, the thermal management of plate lithium-ion battery packs using phase change materials was investigated. It was found that increasing the number of PCM packages can reduce the maximum temperature of the battery and improve temperature uniformity. Additionally, increasing the charge and recharging rate of the battery results in higher temperature and more molten PCM.