OPERATION STATE ESTIMATION APPARATUS AND OPERATION STATE ESTIMATION METHOD FOR ENERGY STORAGE DEVICE, AND ENERGY STORAGE SYSTEM

• US 20170074943A1
• Filed: 03/12/2015
• Published: 03/16/2017
• Est. Priority Date: 03/28/2014
• Status: Abandoned Application

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: TAO, Yohei
• Application Number:
  US15/122,901
• Publication Number:
  US 20170074943A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• 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

An operation state estimation apparatus configured to estimate an operation state of an energy storage device includes a history acquirer configured to acquire a charge-discharge history of the energy storage device during a predetermined period, and a pattern data generator configured to generate pattern data in accordance with the acquired charge-discharge history, the pattern data being obtained by patterning data indicating repetitive variation out of data indicating variation in state quantity of the energy storage device during the predetermined period. An operation state estimation method of estimating an operation state of an energy storage device executed by a computer includes a history acquisition step of acquiring a charge-discharge history of the energy storage device during a predetermined period, and a pattern data generation step of generating pattern data in accordance with the acquired charge-discharge history.

Claims

1. An operation state estimation apparatus configured to estimate an operation state of an energy storage device, the apparatus comprising:

a history acquirer configured to acquire a charge-discharge history of the energy storage device during a predetermined period; and

a pattern data generator configured to generate pattern data in accordance with the acquired charge-discharge history, the pattern data being obtained by patterning data indicating repetitive variation out of data indicating variation in state quantity of the energy storage device during the predetermined period.

2. The operation state estimation apparatus according to claim 1, wherein the history acquirer acquires, as the charge-discharge history, information including first information on at least one of a voltage or a current of the energy storage device during the predetermined period and information on a service period of the energy storage device, and

the pattern data generator generates the pattern data in accordance with a relation between second information on the state quantity of the energy storage device obtained from the first information, and the information on the service period of the energy storage device.

3. The operation state estimation apparatus according to claim 2, wherein the history acquirer acquires, as the charge-discharge history, information including the first information during the predetermined period, information on a temperature of the energy storage device, and the information on the service period thereof, and

the pattern data generator generates the pattern data in accordance with a relation among the second information, the information on the temperature, and the information on the service period.

4. The operation state estimation apparatus according to claim 1, further comprising:

a first storage configured to store the charge-discharge history during the predetermined period;

wherein the history acquirer acquires the charge-discharge history by reading out the charge-discharge history stored in the first storage, and

the pattern data generator generates the pattern data in accordance with the acquired charge-discharge history, writes the generated pattern data in the first storage, and erases the acquired charge-discharge history from the first storage.

5. The operation state estimation apparatus according to claim 1, further comprising:

a detector connected to the energy storage device and configured to detect the charge-discharge history from the energy storage device;

wherein the history acquirer acquires the charge-discharge history detected by the detector.

6. The operation state estimation apparatus according to claim 1, further comprising:

a communicator configured to receive the charge-discharge history from external equipment;

wherein the history acquirer acquires the charge-discharge history received by the communicator.

7. The operation state estimation apparatus according to claim 1, further comprising:

a life estimator configured to estimate a life of the energy storage device in accordance with the pattern data.

8. The operation state estimation apparatus according to claim 7, further comprising:

a second storage configured to store test data resulting from a life test of an energy storage device, the test data indicating capacity decrease under a test condition according to the pattern data;

wherein the life estimator estimates a capacity decrease ratio of the energy storage device during the predetermined period by collating the test data with the pattern data generated by the pattern data generator.

9. The operation state estimation apparatus according to claim 8, wherein the life estimator estimates the life of the energy storage device in accordance with the pattern data generated by the pattern data generator and the capacity decrease ratio of the energy storage device during the predetermined period.

10. An operation state estimation apparatus configured to estimate an operation state of an energy storage device, the apparatus comprising:

an acquirer configured to acquire pattern data obtained by patterning data indicating repetitive variation out of data indicating variation in state quantity of the energy storage device during a predetermined period; and

a life estimator configured to estimate a life of the energy storage device in accordance with the acquired pattern data.

11. An energy storage system comprising:

an energy storage device; and

the operation state estimation apparatus according to claim 1, configured to estimate an operation state of the energy storage device.

12. An operation state estimation method of estimating an operation state of an energy storage device, the method being executed by a computer and comprising:

a history acquisition step of acquiring a charge-discharge history of the energy storage device during a predetermined period; and

a pattern data generation step of generating pattern data in accordance with the acquired charge-discharge history, the pattern data being obtained by patterning data indicating repetitive variation out of data indicating variation in state quantity of the energy storage device during the predetermined period.

13. A program configured to cause a computer to execute the steps included in the operation state estimation method for an energy storage device according to claim 12.

14. An integrated circuit configured to estimate an operation state of an energy storage device, the integrated circuit comprising:

a history acquirer configured to acquire a charge-discharge history of the energy storage device during a predetermined period; and

a pattern data generator configured to generate pattern data in accordance with the acquired charge-discharge history, the pattern data being obtained by patterning data indicating repetitive variation out of data indicating variation in state quantity of the energy storage device during the predetermined period.