Battery diagnosis apparatus for vehicle and method thereof

Patent metadata

Field	Value
Publication number	US-2023298395-A1
Application number	US-202217875007-A
Country	US
Kind code	A1
Filing date	Jul 27, 2022
Priority date	Mar 21, 2022
Publication date	Sep 21, 2023
Grant date	—

Abstract

Disclosed are a battery diagnosis apparatus for a vehicle and a method thereof. The battery diagnosis apparatus for the vehicle includes a communication device that provides a communication interface with a plurality of vehicles, and a controller that collects vehicle state information and battery state information from the plurality of vehicles, manages a maximum voltage difference change rate of battery cells for each cumulative mileage with respect to the plurality of vehicles, and diagnoses abnormalities in batteries provided in the plurality of vehicles based on the maximum voltage difference change rate of the battery cells for each cumulative mileage.

First claim

What is claimed is:

1 . A battery diagnosis apparatus comprising:
a communication device configured to communicate with a plurality of vehicles; and a controller configured to:
receive, from each of the plurality of vehicles, vehicle state information and battery state information;
determine a voltage difference change rate associated with battery cells for each vehicle of the plurality of vehicles; and
diagnose, based on the voltage difference change rate, one or more abnormalities in each battery of batteries of the plurality of vehicles.

2 . The battery diagnosis apparatus of claim 1 , further comprising:
storage configured to store data associated with a distribution map in which the voltage difference change rate is recorded, wherein the voltage difference change rate comprises a voltage difference change rate over a cumulative mileage.

3 . The battery diagnosis apparatus of claim 1 , wherein:
the vehicle state information comprises at least one of: charging information, parking information, driving information, or cumulative mileage information; and the battery state information comprises at least one of: voltage, current, or temperature associated with battery cells.

4 . The battery diagnosis apparatus of claim 1 , wherein, for each vehicle of the plurality of vehicles, the controller is configured to:
determine a difference between a maximum voltage and a minimum voltage among the battery cells at a first time as a first maximum voltage difference; determine a difference between a maximum voltage and a minimum voltage among the battery cells at a second time as a second maximum voltage difference; and obtain 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.

5 . The battery diagnosis apparatus of claim 1 , wherein the controller is configured to:
generate a distribution map using the voltage difference change rate for a corresponding cumulative mileage, and determine that at least one voltage difference change rate associated with at least one of the batteries of the plurality of vehicles exceeding a reference value from a center line of the distribution map is abnormal.

6 . The battery diagnosis apparatus of claim 1 , wherein the controller is configured to:
diagnose the batteries based on a condition comprising at least one of:
a state of charge (SOC) of the batteries that satisfies a first reference range;
a temperature of the batteries that satisfies a second reference range; or
a current of the batteries that satisfies a third reference range.

7 . The battery diagnosis apparatus of claim 1 , wherein the controller is configured to:
detect an abnormality in a battery of a second vehicle of the plurality of vehicles based on a cumulative mileage of the second vehicle exceeding a reference mileage.

8 . A battery diagnosis method comprising:
receiving, from each of a plurality of vehicles, vehicle state information and battery state information; determining, by a controller, a voltage difference change rate associated with battery cells for each vehicle of the plurality of vehicles; and diagnosing, based on the voltage difference change rate, one or more abnormalities in each battery of batteries of the plurality of vehicles.

9 . The battery diagnosis method of claim 8 , further comprising:
storing data associated with a distribution map in which the voltage difference change rate is recorded, wherein the voltage difference change rate comprises a voltage difference change rate over a cumulative mileage.

10 . The battery diagnosis method of claim 8 , wherein:
the vehicle state information comprises at least one of:
charging information, parking information, driving information, or cumulative mileage information; and the battery state information comprises at least one of:
voltage, current, or temperature associated with battery cells.

11 . The battery diagnosis method of claim 8 , further comprising, for each vehicle of the plurality of vehicles:
determining, by the controller, a difference between a maximum voltage and a minimum voltage among the battery cells at a first time as a first maximum voltage difference; determining, by the controller, a difference between a maximum voltage and a minimum voltage among the battery cells 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.

12 . The battery diagnosis method of claim 8 , wherein the diagnosing includes:
generating, by the controller, a distribution map using the voltage difference change rate for a corresponding cumulative mileage; and determining, by the controller, that at least one voltage difference change rate associated with at least one of the batteries of the plurality of vehicles exceeding a reference value from a center line of the distribution map is abnormal.

13 . The battery diagnosis method of claim 8 , wherein the diagnosing includes:
diagnosing, by the controller, the batteries based on a condition comprising at least one of:
a state of charge (SOC) of the batteries that satisfies a first reference range;
a temperature of the batteries that satisfies a second reference range; or
a current of the batteries that satisfies a third reference range.

14 . The battery diagnosis method of claim 8 , wherein the diagnosing includes:
detecting an abnormality in a battery of a second vehicle of the plurality of vehicles based on a cumulative mileage of the second vehicle exceeding a reference mileage.

15 . A battery diagnosis apparatus comprising:
a communication device configured to communicate with a server; and a controller configured to:
receive, from the server, a reference voltage difference change rate associated with battery cells that corresponds to a cumulative mileage of a vehicle;
determine a voltage difference change rate associated with battery cells of the vehicle; and
diagnose, based on the reference voltage difference change rate and the determined voltage difference change rate, an abnormality in the battery cells of the vehicle.

16 . The battery diagnosis apparatus of claim 15 , further comprising:
storage configured to store data associated with a distribution map in which the reference voltage difference change rate is recorded.

17 . The battery diagnosis apparatus of claim 15 , wherein the controller is configured to:
collect, as vehicle state information, at least one of:
charging information, parking information, driving information, or cumulative mileage information; and collect, as battery state information, at least one of:
voltage, current, or temperature associated with battery cells.

18 . The battery diagnosis apparatus of claim 15 , wherein the controller is configured to:
determine a difference between a maximum voltage and a minimum voltage among the battery cells of the vehicle at a first time as a first maximum voltage difference; determine a difference between a maxi

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Yi Jae Shin
• Park Sang Jin
• Jang Hyun Jun
• Kang Tae Kyu
• Park Byung Soo
• Kim Woo Sung
• Park Soo Youn

Classifications

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• G07C5/008 Primary

  communicating information to a remotely located station (transmission systems for measured values G08C) · CPC title

• B60L58/12 Primary

  responding to state of charge [SoC] · CPC title

• B60L58/24

  for controlling the temperature of batteries · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title