Patent ID: 11959972
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 12:
13. A battery diagnosing method, comprising:
measuring, by each of a voltage sensor and a temperature sensor, a voltage and a temperature of a battery, respectively;
calculating, by a controller, a voltage change amount by comparing the measured voltage of the battery with a reference voltage;
calculating, by the controller, a resistance change rate by comparing, by the controller, an ohmic resistance of the battery determined based on an impedance profile generated for the battery with a reference resistance;
determining, by the controller, an internal gas generation level of the battery by comparing magnitudes of the calculated resistance change rate and a threshold resistance change rate; and
determining, by the controller, an internal gas generation cause of the battery by comparing magnitudes of the calculated voltage change amount and a threshold voltage change amount.