A comprehensive investigation on thermal management of large‐capacity pouch cell using micro heat pipe array

Abstract

A proper and effective battery thermal management system (BTMS) is critical for large-capacity pouch cells to guarantee a suitable operating temperature and temperature difference. Hence, in this paper, a micro heat pipe array (MHPA) is utilized to build the thermal management system for large-capacity pouch cells. In order to study the property of BTMS in depth, experimental and numerical investigation are carried out by considering the C-rate, working medium, air velocity and duty. The experimental results present that the Tmax can be maintained below 43.7°C and the ΔT is below 4.9°C at the discharge rate of 3C in the battery module with MHPA-liquid. Moreover, the Tmax of the battery module with MHPA-liquid falls as the air velocity increases. The simulation results show that the variation and distribution of temperature matched well with experimental results. It demonstrates that the MHPA-based BTMS is viable and effective for large-capacity pouch cell battery, even at high C-rate and cycle duty.