Apparatus and method for evaluating battery state of charge

Patent metadata

Field	Value
Publication number	US-2020217898-A1
Application number	US-201916702930-A
Country	US
Kind code	A1
Filing date	Dec 4, 2019
Priority date	Jan 8, 2019
Publication date	Jul 9, 2020
Grant date	—

Abstract

An apparatus for estimating a battery state of charge includes a computer that determines a lifespan of a battery by creating test conditions for the battery by reflecting predetermined driving information of a vehicle and then performing the test conditions; and a tester that performs charging according to predetermined charging conditions and discharging according to predetermined discharging conditions on the battery in accordance with the test conditions.

First claim

What is claimed is:

1 . An apparatus for estimating a battery state of charge, the apparatus comprising:
a computer that determines a lifespan of a battery by creating test conditions for the battery by reflecting predetermined driving information of a vehicle and then performing the test conditions; and a tester that performs charging according to predetermined charging conditions and discharging according to predetermined discharging conditions on the battery in accordance with the test conditions.

2 . The apparatus of claim 1 , wherein the test conditions include a main micro-cycle that performs discharging and recharging after discharging for a predetermined first time.

3 . The apparatus of claim 2 , wherein the main micro-cycle performs discharging for a predetermined second time for discharging acceleration, performs charging until the battery is charged with a predetermined charging amount, repeats a sub-micro-cycle that sequentially performs discharging and charging with a predetermined specific number of repetitions, performs discharging for a predetermined third time, and then has a rest period for a predetermined fourth time.

4 . The apparatus of claim 3 , wherein the sub-micro-cycle performs discharging for a predetermined fifth time and then performs charging for a predetermined sixth time.

5 . The apparatus of claim 4 , wherein the sub-micro-cycle is repeated for a predetermined seventh time when an energy use amount is smaller than a predetermined reference value, and
wherein the main micro-cycle is performed when the energy use amount is the same as or larger than the reference value.

6 . The apparatus of claim 1 , wherein an amount of discharging is determined through discharging coulomb counting, and an amount of charging is determined through charging coulomb counting and reflects vehicle characteristics.

7 . The apparatus of claim 1 , wherein the test conditions progress after an engine of the vehicle is turned off.

8 . The apparatus of claim 5 , wherein the energy use amount is any one of a State Of Charge (SOC), a State Of Health (SOH), a Depth Of Discharging (DOD), a State Of Function (SOF), and a charging voltage.

9 . The apparatus of claim 1 , wherein the battery is positioned in a chamber having a predetermined temperature for a predetermined eighth time, and the battery is a fully charged fresh battery that has not been used for any test before.

10 . The apparatus of claim 1 , wherein the driving information includes driving mode information of the vehicle, electrical load information, Idle Stop and Go (ISG) entrance information, and ISG removal information.

11 . A method of estimating a battery state of charge, the method comprising:
determining, by a computer, a lifespan of a battery by creating test conditions for the battery by reflecting predetermined driving information of a vehicle and then performing the test conditions; performing, by a tester, charging according to predetermined charging conditions and discharging according to predetermined discharging conditions on the battery in accordance with the test conditions; and determining, by the computer, a lifespan of the battery in accordance with results of the charging and discharging.

12 . The method of claim 11 , wherein the test conditions include a main micro-cycle that performs discharging and recharging after discharging for a predetermined first time.

13 . The method of claim 12 , wherein the main micro-cycle performs discharging for a predetermined second time for discharging acceleration, performs charging until the battery is charged with a predetermined charging amount, repeats a sub-micro-cycle that sequentially performs discharging and charging with a predetermined specific number of repetitions, performs discharging for a predetermined third time, and then has a rest period for a predetermined fourth time.

14 . The method of claim 13 , wherein the sub-micro-cycle performs discharging for a predetermined fifth time and then performs charging for a predetermined sixth time.

15 . The method of claim 14 , wherein the sub-micro-cycle is repeated for a predetermined seventh time when an energy use amount is smaller than a predetermined reference value, and
wherein the main micro-cycle is performed when the energy use amount is the same as or larger than the reference value.

16 . The method of claim 11 , wherein an amount of discharging is determined through discharging coulomb counting, an amount of charging is determined through charging coulomb counting and reflects vehicle characteristics.

17 . The method of claim 11 , wherein the test conditions progress after an engine of the vehicle is turned off.

18 . The method of claim 15 , wherein the energy use amount is any one of a State Of Charge (SOC), a State Of Health (SOH), a Depth Of Discharging (DOD), a State Of Function (SOF), and a charging voltage.

19 . The method of claim 11 , wherein the battery is positioned in a chamber having a predetermined temperature for a predetermined eighth time, and the battery is a fully charged fresh battery that has not been used for any test before.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Johnson Controls Autobatterie Gmbh & Co Kgaa

Inventors

• Lee Young-Kug
• Ryu Ki-Seon
• Jin Jae-Eun
• Kim Jong-Dae
• Koch Ingo
• Albers Jorn

Classifications

• G01R31/382

  Arrangements for monitoring battery or accumulator variables, e.g. SoC · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60L58/16

  responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH] · CPC title

• B60L3/12

  Recording operating variables {; Monitoring of operating variables} · CPC title

• B60L58/12 Primary

  responding to state of charge [SoC] · CPC title