A thermal conductive composite phase change material with enhanced volume resistivity by introducing silicon carbide for battery thermal management

作者：Yuan, Wangzhou; Yang, Xiaoqing^*; Zhang, Guoqing; Li, Xinxi

来源：Applied Thermal Engineering, 2018, 144: 551-557.

DOI：10.1016/j.applthermaleng.2018.07.095

• Phase change material
• Battery thermal management
• Thermal conductivity
• Volume resistivity
• Cooling performance

Conventional strategy to enhance the thermal conductivity of the composite phase change material (CPCM) may raise another neglected safety issue in practical applications of battery thermal management (BTM): the electrical conductivity of the CPCM module is significantly increased due to the addition of the conductive carbonaceous or metallic component. To address this issue, we develop a new kind of CPCM herein by introducing a silicon carbide (SiC)/expanded graphite thermal conductive skeleton. The high thermal conductivity and electrical resistivity of the SiC endow the obtained CPCM with a high thermal conductivity but low electrical conductivity. For example, after adding 15 wt% of SiC, the volume resistivity of the CPCM is increased from 4.9 to 12.5 x 10(11) Omega cm, whereas the corresponding thermal conductivity is increased from 1.1 to 2.0 W m(-1) K-1, thus giving rise to a much better cooling performance for BTM, especially under high discharge rate. Furthermore, adding a suitable amount of the SiC will also enhance the mechanical strength, which is beneficial to the practical application.

• 出版日期2018-11-5
• 单位广东工业大学