Post-deterioration performance estimating apparatus and post-deterioration performance estimating method for energy storage device, and energy storage system

• US 10,371,757 B2
• Filed: 01/17/2017
• Issued: 08/06/2019
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: Tao, Yohei, Yamate, Shigeki
• Primary Examiner(s): Lee, Paul D
• Application Number:
  US15/407,879
• Publication Number:
  US 20170123013A1
• Time in Patent Office: 931 Days
• Field of Search: 324430
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/385 Arrangements for measuring battery or accumulator variables for monitoring G01R31/382
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: H01M 10/4285 Testing apparatus
• 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 7/0048 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

Abstract

A post-deterioration performance estimating apparatus wherein a post-deterioration performance value indicates performance of an energy storage device. The apparatus includes a post-deterioration performance estimator is configured to electronically estimate the post-deterioration performance value at a deterioration point using (1) a relation between a cumulative operating period and a resistance value, (2) a relation between the resistance value and energy storage capacity, and (3) the cumulative operating period at the deterioration point. Alternatively, the post-deterioration performance estimator is configured to electronically estimate the post-deterioration performance value at a deterioration point using (1) a relation between an equilibrial capacity decreased amount, (2) a kinetic capacity decreased amount, and (3) a cumulative operating period at the deterioration point.

Claims

1. A post-deterioration performance estimating apparatus wherein a post-deterioration performance value indicates performance of an energy storage device, the apparatus comprising:

a post-deterioration performance estimator configured to electronically estimate the post-deterioration performance value at a deterioration point using a relation between an equilibrial capacity decreased amount, a kinetic capacity decreased amount, and a cumulative operating period at the deterioration point,

wherein charge-discharge control is performed according to the estimated post-deterioration performance value.

2. The post-deterioration performance estimating apparatus according to claim 1, wherein the post-deterioration performance estimator comprises a data acquiring unit which measures or acquires the cumulative operating period.

3. An energy storage system comprising:

an energy storage device; and

the post-deterioration performance estimating apparatus according to claim 1.

4. A post-deterioration performance estimating method wherein a post-deterioration performance value indicates performance of an energy storage device, the method comprising:

electronically estimating, by a post-deterioration performance estimator, the post-deterioration performance value at a deterioration point using a relation between an equilibrial capacity decreased amount, a kinetic capacity decreased amount, and a cumulative operating period, and the cumulative operating period at the deterioration point,

wherein charge-discharge control is performed according to the estimated post-deterioration performance value.

5. The post-deterioration performance estimating method according to claim 4, further comprising:

measuring to acquire, by a data acquiring unit, the cumulative operating period or acquiring, by the data acquiring unit, the cumulative operating period.

6. The post-deterioration performance estimating method according to claim 4, wherein the electronically estimating is provided through a transmission medium.