Patent ID: 11959969
Assignee: LG ENERGY SOLUTION, LTD.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G

Claim 13:
14. The apparatus of claim 1, wherein
the data processing circuit is further configured to calculate a relative reference value based on target statistical values of battery cells, including the battery cell, of the battery,
the diagnosis circuit is further configured to:
determine whether or not an error has occurred in the battery cell through a relative determination operation of comparing the target statistical value with the relative reference value and counting a number of times of relative error when it is determined that the error has occurred in the battery cell through the relative determination operation,
determine whether or not the error has occurred in the battery cell through an absolute determination operation of comparing the target statistical value with an absolute reference value and counting a number of times of absolute error when it is determined that the error has occurred in the battery cell through the absolute determination operation, and
determine that the battery cell is defective when the number of times of absolute error, the number of times of relative error, and the number of times of cumulative error satisfy a diagnostic condition, and the battery cells are battery cells of a battery module including the battery cell.