A review on passive cooling techniques for lithium-ion battery thermal management system of electric vehicle

Abstract Li ion batteries have gained popularity in electric vehicle application in past few years because of its high energy density and long-life cycle. The high energy density Li ion batteries are also generating a large amount of heat which needs to be dissipated for the stability, longevity of the battery and safety of vehicle. Thus, a battery thermal management system (BTMS) is very much essential for the battery system. The objective of BTMS is to maintain the cell temperature and thus improve life cycle of battery system. It has been reported that the battery pack has better thermal stability and lifetime when operated at a temperature range of 15 to 35 °C and maximum cell temperature difference of 5 °C. Among battery cooling techniques, passive approaches are considered as less complex and less expensive. In this context, a review on passive cooling methods for BTMS has been discussed in this paper. Subsequently, a summary of characteristic parameter for an efficient passive BTMS has been provided.