Patent ID: 11929472
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC H

Claim 12:
13. A battery diagnosing method, comprising:
measuring, by a temperature sensor, a temperature of a battery;
measuring, by a current sensor, a discharge current of the battery;
receiving, by a controller, a discharge capacity of the battery based on discharge current measurements of the current sensor;
calculating, by a controller, a capacity change rate by comparing the received discharge capacity of the battery with a reference capacity;
calculating, by the controller, a resistance change rate by comparing 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 capacity change rate and a threshold capacity change rate.