Lg Energy Solution, Ltd.

Gwangju Institute of Science and Technology

Hyeong Jin Kim

Seok Koo Kim

Wonhee Kim

Dongin Choi

Methods and systems may reliably predict the lifespan characteristics of a lithium secondary battery, for example, the mode of variation in cycle capacity in advance. A method may include a first step of subjecting a lithium secondary battery in a form of a blocking cell to an impedance spectroscopic analysis, a second step of deriving a relationship capacitance for each frequency and a calculating a charge amount, a third step of repeatedly performing the first and second steps, and a fourth step of measuring a capacity for each cycle of the lithium secondary battery and deriving a prediction expression of the capacity for each cycle of the lithium secondary battery.

Growing community of inventors

Gwangju, South Korea

Hyeong Jin Kim