Granted Patent B2

US 12,637,055 · App. 17/891,440 · Granted May 26, 2026

Inventors: Jae Shin Yi (Seoul, KR); Sang Jin Park (Bucheon, KR); Tae Kyu Kang (Seoul, KR); Byung Soo Park (Daejeon, KR); Woo Sung Kim (Suwon, KR); Soo Youn Park (Anyang, KR)

Assignees: Hyundai Motor Company; Kia Corporation

B60W10/26B60R16/0231G01R31/3648G01R31/3842H01M10/425H01M2010/4271H01M2010/4278H01M2220/20

Abstract

Claims (39)

1 . A method of diagnosing a battery of a vehicle, the method comprising:

recording, by an odometer, an accumulated driving distance of the vehicle;

storing, by storage, a threshold value for each of a plurality of sections of the accumulated driving distance corresponding to a state of the vehicle;

measuring, by a battery module, battery state information including at least one of voltage, current, or temperature of a battery cell of the vehicle battery,

collecting, by a controller, vehicle state information and the battery state information;

determining, by the controller, a maximum voltage difference change rate of the battery cell for an accumulated driving distance for the vehicle; and

diagnosing, by the controller, an abnormality in the vehicle battery based on the maximum voltage difference change rate of the battery cell for the accumulated driving distance of the vehicle and a threshold value corresponding to the maximum voltage difference change rate;

wherein determining of the maximum voltage difference rate by the controller comprises:

determining a difference between a maximum voltage and a minimum voltage of the battery cell at a first time as a first maximum voltage difference;

determining a difference between a maximum voltage and a minimum voltage of the battery cell at a second time as a second maximum voltage difference; and

obtaining the voltage difference change rate by dividing a difference between the second maximum voltage difference and the first maximum voltage difference by a difference between a cumulative mileage at the second time and a cumulative mileage at the first time;

wherein the voltage difference change rate corresponds to the cumulative mileage at the second time; and

outputting, by an output device including a processor, at least one of a visual warning or an audible warning of the diagnosed abnormality.

2 . The method of claim 1 , wherein the collecting of the vehicle state information and the battery state information comprises:

collecting, by the controller, at least one of charging, parking, driving and the accumulated driving distance as the vehicle state information.

3 . The method of claim 1 , wherein the diagnosing of the abnormality comprises:

determining, by the controller, a threshold value corresponding to the state of the vehicle and the accumulated driving distance;

comparing, by the controller, the maximum voltage difference change rate of the battery cell for the accumulated driving distance of the vehicle with the threshold value corresponding to the vehicle; and

diagnosing, by the controller, that an abnormality occurs in the battery of the vehicle when the maximum voltage difference change rate exceeds the threshold value.

4 . The method of claim 1 , wherein the diagnosing of the abnormality comprises:

determining, by the controller, the diagnosing of the battery when a state of charge (SOC) of the battery satisfies a first reference range, a temperature of the battery satisfies a second reference range, and a current of the battery satisfies a third reference range.

5 . An apparatus for diagnosing a battery of a vehicle, the apparatus comprising:

the battery;

a vehicle network connection device;

an odometer configured to record an accumulated driving distance of the vehicle;

storage configured to store a threshold value for each of a plurality of sections of the accumulated driving distance corresponding to a state of the vehicle;

a battery module configured to measure battery state information including at least one of voltage, current, or temperature of a battery cell of the vehicle battery; and

a controller configured to:

collect vehicle state information and the battery state information through the vehicle network connection device,

determine a maximum voltage difference change rate of the battery cell for an accumulated driving distance of the vehicle, and

diagnose an abnormality in a battery based on the maximum voltage difference change rate of the battery cell for the accumulated driving distance of the vehicle and a threshold value corresponding to the maximum voltage difference change rate;

determine a difference between a maximum voltage and a minimum voltage of the battery cell at a first time as a first maximum voltage difference;

determine a difference between a maximum voltage and a minimum voltage of the battery cell at a second time as a second maximum voltage difference; and

obtain the maximum voltage difference change rate by dividing a difference between the second maximum voltage difference and the first maximum voltage difference by a difference between a cumulative mileage at the second time and a cumulative mileage at the first time;

wherein the maximum voltage difference change rate corresponds to the cumulative mileage at the second time; and

an output device including a processor and configured to provide at least one of a visual warning or an audible warning of the diagnosed abnormality.

6 . The apparatus of claim 5 , wherein the controller is further configured to collect at least one of charging, parking, driving and the accumulated driving distance as the vehicle state information.

7 . The apparatus of claim 5 , wherein the controller is further configured to determine a threshold value corresponding to the state of the vehicle and the accumulated driving distance, compare the maximum voltage difference change rate of the battery cell for the accumulated driving distance of the vehicle with the threshold value, and diagnose that an abnormality occurs in the battery when the maximum voltage difference change rate exceeds the threshold value.

8 . The apparatus of claim 5 , wherein the controller is further configured to diagnose the battery when a state of charge (SOC) of the battery satisfies a first reference range, a temperature of the battery satisfies a second reference range, and a current of the battery satisfies a third reference range.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (14)