A study of thermal management to lithium battery set using paraffin and exfoliated graphite

• Main Authors: Yi-Lung Hsieh, 謝宜隆
• Other Authors: Hsiharng Yang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/x4xgd5

碩士 === 國立中興大學 === 精密工程學系所 === 104 === This study aims to utilize paraffin and exfoliated graphite to fabricate a phase change material (PCM) for thermal management in the Li-ion battery set. When lithium batteries discharge with a high temperature, the PCM is capable to conduct their heat and reduce their surface temperature. The melting mix method was used to fabricate the PCM with the ratio of 65:35, 70:30, 75:25, 80:20, 85:15, and analyze the trend of latent heat by Differential Scanning Calorimeter. Then, the intensive mixer was used to fabricate the PCM with the ratio 75:25, and measured its thermal conductivity of 10.65(W/m.k) which was 48 times greater than the original paraffin of 0.22(W/m.k). It is significantly increased the PCM thermal conductivity than paraffin. The lithium batteries were placed inside the PCM and observed their surface temperature by the infrared thermal video system. The results showed that the PCM can reduce the battery set surface temperature about 11.2°C. The PCM is effectively to control the battery surface temperature under 40°C as a thermal management material for the Li-ion battery set.