Patent ID: 11942810
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  G  Y | IPC B  G  H

Claim 11:
12. A method for controlling an operation of a secondary battery using a relative deterioration degree of an electrode, comprising:
(a) measuring voltage, current and temperature of the secondary battery;
(b) determining an SOC of the secondary battery in response to a pulse current flowing through the secondary battery in a preset deterioration diagnosing SOC section;
(c) determining an electrochemical reaction resistance from a voltage change amount measured during a preset initial time in each section of the pulse current and determining an ion diffusion resistance from a voltage change amount measured during a remaining time in each section of the pulse current excluding the initial time;
(d) determining a deterioration-biased electrode by comparing a deterioration diagnosing resistance ratio, which is a ratio of the ion diffusion resistance to the electrochemical reaction resistance, with a preset reference deterioration diagnosing resistance ratio; and
(e) adaptively adjusting an operation condition of a next charging/discharging cycle according to the determined deterioration-biased electrode.