Patent ID: 11906591
Assignee: LG ENERGY SOLUTION, LTD.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 13:
14. An insulation resistance measurement method comprising:
calculating, by a controller, a first insulation resistance value of a first resistance unit having a first variable resistance and positioned between a positive side of a battery and a ground and a second insulation resistance value of a second resistance unit having a second variable resistance and positioned between a negative side of the battery and the ground in each of a first insulation resistance measurement mode and a second insulation resistance measurement mode, wherein the first insulation resistance measurement mode has a lower error rate than the second insulation resistance measurement mode in a first measurement range, and wherein the second insulation resistance measurement mode has a lower error rate than the first insulation resistance measurement mode in a second measurement range;
determining, by the controller, which of the respective measurement ranges corresponds to each of the first and second insulation resistance values; and
determining, by the controller, an actual insulation resistance value using the respective insulation resistance measurement mode for which the insulation resistance measurement error rate within the determined measurement range is lowest.