Battery diagnosis system and method

Patent metadata

Field	Value
Publication number	US-12436198-B2
Application number	US-202117520007-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Nov 6, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

The present invention relates to a battery diagnosis system and method, and disclosed is a battery diagnosis system including a receiving unit that receives information on a high voltage battery and charge state information of the high voltage battery of a vehicle being charged; a control unit that controls a current of the high voltage battery; a measurement unit that measures a voltage change amount of the high voltage battery in which the current is controlled; and a determination unit that determines the battery having the voltage change amount of an abnormal battery among the voltage change amounts of the battery measured in the measurement unit.

First claim

What is claimed is:

1. A battery diagnosis system, comprising:
a receiving unit that receives charge state information of a high voltage battery of a vehicle being charged including charging types of the high voltage battery;
a control unit that controls a current of the high voltage battery;
a measurement unit that measures a voltage change amount of the high voltage battery in which the current is controlled; and
a determination unit that determines the battery having the voltage change amount of an abnormal battery among the voltage change amounts of the battery measured in the measurement unit,
wherein the determination unit determines the battery having the voltage change amount of an abnormal battery in different ways depending on the charging types according to the charging state information,
wherein the control unit controls the current of the high voltage battery to a target current value based on the charging types of the high voltage battery included in the received charge state information, and
wherein the measurement unit measures the voltage change amount of the high voltage battery in which the current is controlled to the target current value.

2. The battery diagnosis system according to claim 1 ,
wherein the receiving unit receives information on the high voltage battery, and
wherein the information on the high voltage battery of the vehicle received in the receiving unit includes a current and voltage of the high voltage battery and temperature information of the high voltage battery, and wherein the charging type includes fast charging state or slow charging state.

3. The battery diagnosis system according to claim 2 ,
wherein the control unit controls the current of the high voltage battery to the target current value further considering the received battery temperature.

4. The battery diagnosis system according to claim 1 ,
wherein the measurement unit measures the voltage change amount of an individual battery cell of the high voltage battery in which the current is controlled, and the determination unit determines the battery cell having the voltage amount of an abnormal battery cell among the voltage change amount of the individual battery cell measured in the measurement unit as the abnormal battery cell.

5. The battery diagnosis system according to claim 1 ,
wherein the control unit controls the current of the high voltage battery to the target current value by lowering a current amount consumed by an electric component.

6. The battery diagnosis system according to claim 1 ,
wherein the determination unit determines the battery having the voltage change amount of the abnormal battery through polarization voltage characteristic of the battery while the current is controlled to the target current value.

7. The battery diagnosis system according to claim 1 ,
wherein the determination unit determines that the battery having the voltage change amount of the abnormal battery among the voltage change amounts of the battery as the abnormal battery based on a comparison of the voltage change amount of a normal battery and the voltage change amount of the abnormal battery.

8. The battery diagnosis system according to claim 1 ,
further comprising a display unit that diagnoses the abnormal battery determined by the determination unit as a fault and displays a normal battery and the abnormal battery.

9. The battery diagnosis system according to claim 1 ,
further comprising a calculation unit that calculates a deterioration degree of the battery, and
wherein the deterioration degree of the battery is calculated through a resistance value of the battery in which charging is completed compared to an initial battery resistance value.

10. A battery diagnosis method, comprising the steps of:
receiving charge state information of the high voltage battery of a vehicle being charged including charging types of the high voltage battery;
controlling a current of the high voltage battery;
measuring a voltage change amount of the high voltage battery in which the current is controlled; and
determining the battery having the voltage change amount of an abnormal battery among the voltage change amounts of the battery measured in a measurement unit as the abnormal battery,
wherein in the step of determining the battery having the voltage change amount of an abnormal battery, the battery having the voltage change amount of an abnormal battery is determined in different ways depending on the charging types according to the charging state information,
wherein a control unit controls the current of the high voltage battery to a target current value based on the charging types of the high voltage battery included in the received charge state information, and
wherein the measurement unit measures the voltage change amount of the high voltage battery in which the current is controlled to the target current value.

11. The battery diagnosis method according to claim 10 ,
wherein in the step of determining as the abnormal battery, the battery having the voltage change amount of the abnormal battery among the voltage change amounts of the battery is determined as the abnormal battery based on a comparison of the voltage change amount of a normal battery and the voltage change amount of the abnormal battery.

12. The battery diagnosis method according to claim 10 ,
further comprising, after the step of determining the battery having the voltage change amount of the abnormal battery as the abnormal battery, the step of diagnosing the abnormal battery determined in a determination unit as a fault and displaying a normal battery and the abnormal battery.

13. The battery diagnosis method according to claim 10 ,
further comprising, after the step of determining the battery having the voltage change amount of the abnormal battery as the abnormal battery, the step of transmitting information on a normal battery and the abnormal battery.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Yi Jae Shin
• Kim Woo Sung
• Min Kyung In
• Hwang Do Sung
• Baek Ki Seung
• Kim Dong Il
• Jin Dae Gun
• Lee Yoon Jun
• Yang Bo Ram
• Hong Ki Chul
• Kim Ik Kyu
• Lee Sung Il
• Lee Young Woo
• Jin Soo Yang
• Kim Suk Hyung
• Park Hyun Soo

Classifications

• G05B23/0256

  injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system · CPC title

• G05B23/0218

  characterised by the fault detection method dealing with either existing or incipient faults · CPC title

• B60L58/21

  having the same nominal voltage · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• B60L3/0046 Primary

  relating to electric energy storage systems, e.g. batteries or capacitors · CPC title