Patent ID: 11959971
Assignee: LG ENERGY SOLUTION, LTD.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 4:
5. The method of claim 4, wherein the cell connection failure final detection step comprises:
a charging current formation step of forming a charging current in the battery first detected as being in a cell connection failure state due to the CID operation or the open parallel connection line in the cell connection failure first detection step;
a DCIR measurement step of measuring Direct Current Internal Resistance (DCIR) of the battery while charging current flows through the battery by the charging current formation step;
a DCIR comparison step of comparing whether a DCIR value of the battery measured in the DCIR measurement step is out of a predetermined DCIR reference range; and
a connection failure final determination step of finally determining that a cell connection failure occurs due to the CID operation or the open parallel connection line in the corresponding battery when the DCIR value of the battery is out of the predetermined DCIR reference range according to a result of the DCIR comparison step.