In this paper, four types of commercial high-power batteries, including two types of LTO/NCM lithium-ion battery from two different manufacturers, a C/LMO battery and a supercapacitor (SC) are subjected to a durability test. A realistic current profile for HEVs is used in the durability test according to the Ref. [31]. During the durability test process, reference tests including a capacity test and HPPC test are performed at intervals to measure the capacity and resistance of the battery, followed by a durability comparison of those four types of batteries according to the results of the capacity fade and increase in resistance. Constant current charge curves in the reference tests are also used to analyze the reason for the aging. Then, the mechanistic and prognostic model is used to clarify the degradation mechanism by identifying the model
parameters using a genetic algorithm, and the degradation mechanisms of different high-power batteries under the same operation conditions are analyzed and compared.