METHOD AND APPARATUS FOR LEARNING AND ESTIMATING BATTERY STATE INFORMATION

• US 20150369874A1
• Filed: 06/05/2015
• Published: 12/24/2015
• Est. Priority Date: 06/24/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, SangDo, You, Kaeweon, Lee, Sun-Jae
• Granted Patent: US 10,228,425 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2260/44 by parameter estimation
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60W 2710/244 Charge state
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A method of estimating battery state information includes collecting battery information; partitioning the collected battery information into interval information in a predetermined range; accumulating the interval information; and estimating the battery state information based on the accumulated interval information and learning information determined in advance. A method of learning battery state information includes collecting battery information; partitioning the collected battery information into interval information in a predetermined range; accumulating the interval information; and determining learning information based on the accumulated interval information and reference information of a battery, the learning information being used to estimate the battery state information.

Claims

1. A method of estimating battery state information, the method comprising:

collecting battery information;

partitioning the collected battery information into interval information in a predetermined range;

accumulating the interval information; and

estimating the battery state information based on the accumulated interval information and learning information determined in advance.

2. The method of claim 1, further comprising storing the learning information based on reference information of a battery.

3. The method of claim 2, wherein the storing comprises generating a parameter corresponding to the learning information based on the reference information and sample interval information into which sample battery information is partitioned in the predetermined range.

4. The method of claim 3, wherein the generating comprises learning the parameter by inputting the reference information and the sample interval information to a learner.

5. The method of claim 4, wherein the estimating comprises estimating the battery state information by inputting the accumulated interval information to the learner in which the parameter is learned.

6. The method of claim 1, wherein the collecting comprises measuring in real time any one or any combination of a voltage signal, a current signal, and a temperature signal of a battery.

7. The method of claim 1, wherein the collecting comprises determining, based on a current signal of the battery, whether the battery is being charged or discharged.

8. The method of claim 1, further comprising transforming an input vector corresponding to the accumulated interval information so that a dimension of the input vector is reduced;

wherein the estimating comprises estimating the battery state information based on the transformed input vector and the learning information.

9. The method of claim 1, wherein the partitioning comprises setting a uniform interval in the predetermined range for each of the interval information.

10. The method of claim 1, wherein the partitioning comprises setting a narrow interval in the predetermined range for an interval having a high data generation probability or an interval having a low data generation probability in the battery information.

11. A method of estimating battery state information, the method comprising:

accumulating a usage history of a battery; and

estimating the battery state information based on the usage history and learning information determined in advance.

12. The method of claim 11, wherein the accumulating comprises:

partitioning the usage history into interval information in a predetermined range; and

accumulating the interval information and storing the usage history for each interval.

13. The method of claim 11, wherein the estimating comprises estimating the battery state information by inputting the accumulated usage history to a learner configured to learn the learning information.

14. The method of claim 11, wherein the learning information comprises a parameter generated based on reference information of the battery and sample interval information into which sample battery information is partitioned in a predetermined range.

15. The method of claim 11, wherein the accumulating comprises accumulating a per-interval usage history of any one or any combination of a voltage signal, a current signal, and a temperature signal of the battery.

16. The method of claim 11, further comprising transforming an input vector corresponding to the usage history so that a dimension of the input vector is reduced;

wherein the estimating comprises estimating the battery state information based on the transformed input vector and the learning information.

17. The method of claim 11, wherein the accumulating comprises:

determining, based on a current signal of the battery, whether the battery is being charged or discharged; and

separately accumulating a usage history corresponding to charging of the battery and a usage history corresponding to discharging of the battery.

18. An apparatus for estimating battery state information, the apparatus comprising:

a collector configured to collect battery information;

an accumulator configured to accumulate interval information into which the collected battery information is partitioned in a predetermined range; and

an estimator configured to estimate the battery state information based on the accumulated interval information and learning information determined in advance.

19. The apparatus of claim 18, wherein the estimator comprises a learner configured to output the battery state information using a parameter corresponding to the learning information in response to receiving the accumulated interval information.

20. The apparatus of claim 18, further comprising an interface configured to transmit the estimated battery state information to an external device.