System and method for managing vehicle battery

Patent metadata

Field	Value
Publication number	US-12298352-B2
Application number	US-202117520013-A
Country	US
Kind code	B2
Filing date	Nov 5, 2021
Priority date	Nov 6, 2020
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A system for managing a vehicle battery that is chargeable/dischargeable and stores energy for driving a vehicle driving motor is disclosed. The system for managing a vehicle battery as disclosed includes a controller that measures a voltage of each of a plurality of battery cells in a vehicle battery when a voltage applied to the vehicle battery is constant, and determines whether the plurality of battery cells is abnormal based on a deviation between the measured voltages of the plurality of battery cells.

First claim

What is claimed is:

1. A system for managing a vehicle battery that is chargeable/dischargeable and stores energy for driving a vehicle driving motor, the system comprising:
a controller that measures a polarization voltage corresponding to a decrease in voltage of each of a plurality of battery cells in the vehicle battery that occurs during a preset time interval from a time point when the vehicle battery starts with a no-load state, and determines whether the plurality of battery cells is abnormal based on the deviation between the polarization voltages of the plurality of battery cells.

2. The system for managing the vehicle battery according to claim 1 , wherein the controller measures the voltage of each of the plurality of battery cells when the vehicle battery is charged with a constant current.

3. The system for managing the vehicle battery according to claim 1 , wherein the controller measures the voltage of each of the plurality of battery cells when the vehicle battery is in a no-load state.

4. The system for managing the vehicle battery according to claim 1 , further comprising a cluster or an audio video navigation (AVN) that displays occurrence of abnormality in the battery cells when the controller determines that abnormality is occurred in the battery cells.

5. The system for managing the vehicle battery according to claim 4 , wherein the cluster or the AVN includes a communication module that wirelessly transmits the occurrence of abnormality in the battery cells to a vehicle management server or a wireless terminal of a driver of the vehicle.

6. A system for managing a vehicle battery that is chargeable/dischargeable and stores energy for driving a vehicle driving motor, the system comprising: a controller that measures a voltage of each of a plurality of battery cells in the vehicle battery and compares a deviation between a maximum value and a minimum value among the measured voltages of the plurality of battery cells with a preset reference value, and determines that abnormality is occurred in the battery cells when the deviation between the maximum value and the minimum value is greater than the reference value,
wherein the reference value is preset to be a larger value as a total mileage of the vehicle increases.

7. A system for managing a vehicle battery that is chargeable/dischargeable and stores energy for driving a vehicle driving motor, the system comprising: a controller that measures a voltage of each of a plurality of battery cells in the vehicle battery and compares a deviation between a maximum value and a minimum value among the measured voltages of the plurality of battery cells with a preset reference value, and determines that abnormality is occurred in the battery cells when the deviation between the maximum value and the minimum value is greater than the reference value, wherein the controller measures a polarization voltage corresponding to a decrease in voltage of each of the plurality of battery cells in the vehicle battery for a preset time interval immediately after charging of the vehicle battery is terminated, for each preset total mileage of the vehicle, and determines the reference value corresponding to the preset total mileage based on a magnitude ratio of the polarization voltage and a charging current applied to the vehicle battery immediately before charging of the vehicle battery is terminated.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Lee Sung Il
• 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
• Yi Jae Shin
• Lee Young Woo
• Jin Soo Yang
• Park Hyun Jin
• 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