Patent ID: 11936012
Assignee: HONDA MOTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. An abnormality detection method for a battery pack that detects an abnormality of a battery pack accommodating a plurality of battery cells, the abnormality detection method comprising:
acquiring a voltage value of each of the plurality of battery cells by a voltage value acquisition unit;
acquiring a state value inside the battery pack by a state value measurement unit configured to measure a state value inside the battery pack, the state value being different from a temperature of at least one battery cell among the plurality of battery cells;
performing a voltage value comparison comparing the voltage value with a predetermined voltage threshold value;
performing a state value comparison comparing the state value with a first predetermined state threshold value and comparing a degree of change in the state value per unit time with a second predetermined state threshold value; and
determining an abnormality of the battery pack when the voltage value is equal to or less than the predetermined voltage threshold value and the state value is equal to or greater than the first predetermine state threshold value, or the voltage value is equal to or less than the predetermined voltage threshold value and the degree of change in the state value is equal to or greater than the second predetermined state threshold value.