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

Claim 5:
6. A connection failure detection system of a parallel connection cell, the system comprising:
one or more batteries including at least one or more cells connected in parallel;
a voltage measurer configured to measure a discharge voltage of a battery at predetermined periodic intervals;
a monitor configured to monitor actual driving discharge data derived as an analog signal in a waveform form based on the discharge voltage value measured by the voltage measurer;
a memory configured to store reference data for detecting whether a cell connection failure occurs due to a current interruption device (CID) operation or an open parallel connection line in the battery;
a cell connection failure first detector configured to detect whether there is a section matching the amount of change in the discharge voltage value due to the CID operation or the open parallel connection line of the reference data in the actual driving discharge data monitored by the monitor using the reference data stored in the memory and first detect whether a cell connection failure occurs due to the CID operation or the open parallel connection line in the corresponding battery; and
a cell connection failure final detector configured to finally detect whether a cell connection failure due to the CID operation or the open parallel connection line occurs in the corresponding battery by checking whether the result of the first detection as being in a cell connection failure state is correct through the cell connection failure first detector,
wherein the reference data stored in the memory is configured to include final connection failure detection reference data, and
wherein the final connection failure detection reference data is the amount of change in the discharge voltage value of the battery that occurs when the CID operates or the parallel connection line is opened.