Experimental Comparison of Two Liquid Cooling Methods for Ultrafast Charging Lithium-Ion Battery Modules

Abstract

This paper presents a comparative study between active liquid cooling methods for a lithium-ion battery module using experimental techniques. Three Kokam Nickel Manganese Cobalt battery cells connected in parallel were tested in two battery modules, one with liquid coolant flowing along the edge of the module and another with liquid coolant flowing between the cells. For the tests, the modules were placed in a thermal chamber at 20°C and coolant was circulated through the modules with a chiller set to 20°C. Several characterization tests, including thermal resistance tests, fast charging tests up to 5C, and drive cycle tests were designed and performed on the battery module. The temperature response of the two modules was collected with fifteen temperature sensors and the performance of both module types is compared and contrasted.