To clarify the current research status of mechanical, electrical, and thermal performance changes of batteries after aging at home and abroad, and to provide reference for battery performance prediction and experimental design, battery aging is linked to battery performance. The internal mechanism of battery aging is summarized, and the performance changes of batteries under normal aging and abnormal aging conditions are sorted out. The characteristics of various performance parameters after aging are explored. From the perspectives of battery components and individual cells, it was found that the mechanical properties of lithium-ion batteries deteriorate to varying degrees with aging; Starting from the changes in battery capacity and impedance, describe the decrease in performance of aging batteries; Using the characteristic temperature of thermal runaway as an indicator of battery thermal safety performance, explain the changes in thermal safety of aging batteries; Finally, the future development direction of battery performance research was discussed.