System and method for charging battery

Patent metadata

Field	Value
Publication number	US-11340304-B2
Application number	US-201916414966-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	Dec 11, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A method for charging a battery may include: obtaining a state of health of the battery and a magnitude of an initial charging current preset for the battery; converting the magnitude of the initial charging current on the basis of the state of health of the battery, thereby generating a charging current command; and providing the charging current command to a charger, and supplying a charging current corresponding to the charging current command to the battery by the charger.

First claim

What is claimed is:

1. A system for charging a battery, the system comprising:
a battery;
a charger for providing the battery with a charging current corresponding to a charging current command that is inputted into the charger; and
a controller configured to store a preset magnitude of an initial charging current, convert the preset magnitude of the initial charging current on the basis of a state of health of the battery, thereby generating the charging current command, and provide the charger with the generated charging current command,
wherein the preset magnitude of the initial charging current is a magnitude of a charging current set to be provided to the battery in a state where deterioration of the battery has not progressed, and
wherein the controller is further configured to determine the charging current command by an equation, I=SOH/100*A, where I is a magnitude of the charging current command, SOH is the state of health, and A is the initial charging current.

2. The system of claim 1 , wherein the state of health is a value expressed as a percentage, the value being a ratio of a current capacity of the battery to a capacity of the battery in a state where deterioration of the battery has not progressed.

3. The system of claim 1 , wherein the controller is further configured to determine the preset magnitude of the initial charging current being reduced by a magnitude corresponding to the state of health to be the charging current command.

4. A method for charging a battery, the method comprising steps of:
obtaining a state of health of the battery and a magnitude of an initial charging current preset for the battery;
converting the magnitude of the initial charging current on the basis of the state of health of the battery, thereby generating a charging current command; and
providing the charging current command to a charger, and supplying a charging current corresponding to the charging current command to the battery by the charger,
wherein the magnitude of the initial charging current is a magnitude of a charging current set to be provided to the battery in a state where deterioration of the battery has not progressed, and
wherein in the step of supplying the charging current, the charging current command is determined by an equation, I=SOH/100*A, where I is a magnitude of the charging current command, SOH is the state of health, and A is the initial charging current.

5. The method of claim 4 , wherein the state of health is a value expressed as a percentage, the value being a ratio of a current capacity of the battery to a capacity of the battery in a state where deterioration of the battery has not progressed.

6. The method of claim 4 , wherein in the step of supplying the charging current, the magnitude of the initial charging current reduced by a magnitude corresponding to an amount of the state of health is determined to be the charging current command.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Lee Yoon Jun
• Jeong Byung Jo
• Choi Jae Hoon

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/84 Primary

  Control of state of health [SOH] · CPC title

• G01R31/392 Primary

  Determining battery ageing or deterioration, e.g. state of health · CPC title

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title