US 12,722,497 B2 · Method and apparatus for diagnosing an eco-friendly vehicle battery

Abstract

A method of diagnosing an eco-friendly vehicle battery includes selecting a candidate cell for swelling diagnosis based on voltage levels among a plurality of cells in response to the battery entering a constant voltage charging mode. The method includes determining an average resistance value of the plurality of cells and a resistance value of the candidate cell in response to the constant voltage charging mode starting. The method includes determining the average resistance value and the resistance value in response to a preset condition being satisfied. The method includes determining whether the candidate cell is a swelling cell based on a difference between the resistance value and the average resistance value determined in response to the preset condition being satisfied, and a difference between the resistance value and the average resistance value determined in response to the constant voltage charging mode starting.

Claims20

Dependent claims

A method of diagnosing an eco-friendly vehicle battery, the method comprising:

selecting a candidate cell for swelling diagnosis based on voltage levels from among a plurality of cells constituting the battery of the eco-friendly vehicle in response to the battery entering a constant voltage charging mode;
determining an average resistance value of the plurality of cells and a resistance value of the candidate cell in response to the constant voltage charging mode starting;
determining the average resistance value of the plurality of cells and the resistance value of the candidate cell in response to a preset condition related to a constant voltage charging current being satisfied before the constant voltage charging mode ends;
and
determining whether the candidate cell is a swelling cell based on a difference between the resistance value of the candidate cell and the average resistance value of the plurality of cells determined in response to the preset condition being satisfied and based on a difference between the resistance value of the candidate cell and the average resistance value of the plurality of cells in response to the constant voltage charging mode starting.

2 more elements

An apparatus for diagnosing an eco-friendly vehicle battery, the apparatus comprising:

a battery;
a sensor unit including a current sensor for detecting a current of the battery and a voltage sensor for detecting a voltage of the battery;
and
a battery management unit configured to
select a candidate cell for swelling diagnosis based on voltage levels among a plurality of cells constituting the battery in response to the battery entering a constant voltage charging mode,
determine an average resistance value of the plurality of cells and a resistance value of the candidate cell in response to the constant voltage charging mode starting,
determine the average resistance value of the plurality of cells and the resistance value of the candidate cell in response to a preset condition related to a constant voltage charging current being satisfied before the constant voltage charging mode ends, and
determine whether the candidate cell is a swelling cell based on a difference between the resistance value of the candidate cell and the average resistance value of the plurality of cells in response to the preset condition being satisfied and based on a difference between the resistance value of the candidate cell and the average resistance value of the plurality of cells in response to the constant voltage charging mode starting.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for diagnosing an eco-friendly vehicle battery

Life of this patent

Method and apparatus for diagnosing an eco-friendly vehicle battery

Life of this patent

Abstract

Claims20