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In this study, the duty-cycle of a commercial lithium-ion battery (LIB) for a typical passenger airplane (Bombardier CRJ200) is obtained and compared to the duty- cycle of the same LIB for electric vehicles. For this purpose, the velocity and altitude of the airplane is monitored during a typical flight and the instantaneous mechanical power of the airplane is obtained by modeling. Based on the airplane required power and the characteristics of the LIB, a battery pack is designed for the airplane. Then, the duty-cycle of a LIB cell in the battery pack is yielded. The duty-cycle of the same LIB for a typical electric vehicle is also obtained from modeling based on the Highway Fuel Economy Test (HWFET), New York City Cycle (NYCC) and United States 2006 (US06) drive-cycles. Finally, the duty-cycle of the LIB for two different applications of electric airplane and electric vehicle is compared. The duty-cycles obtained in this study can be employed to study the lifespan of LIBs.

An effective thermal management of lithium-ion battery (LIB) packs for maintaining their operating temperature uniformly and in the manufacturers’ allowable range can increase the battery lifespan for electric and hybrid vehicles. For this purpose, two liquid cooling plates with different flow patterns are designed and compared for a commercial prismatic LIB with graphite anode and lithium iron phosphate (LiFePO4) cathode chemistry. The analysis of the cooling plates is accomplished through mathematical modeling and computer simulation. The cooling plates are designed to dissipate the maximum possible heat generation in the battery in normal operation, which is during the continuous discharge at 5C for the typical LIB under study. An experiment is conducted to determine the local heat flux from the battery during discharge at 5C from the state of charge of 0 to 100%.