# US 10,371,757 B2 · Post-deterioration performance estimating apparatus and post-deterioration performance estimating method for energy storage device, and energy storage system

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- Number: US 10,371,757 B2
- Document ID: US10371757B2
- Status: Granted
- Kind: B2
- Application number: 15/407,879
- Filed: 2017-01-17
- Published: 2017-05-04
- Granted: 2019-08-06
- Earliest claimed: 2012-11-30
- Assignees: GS Yuasa International Ltd.
- Applicants: GS Yuasa International Ltd.
- Inventors: Yohei Tao; Shigeki Yamate
- Web page: https://patentgrep.com/patent/US10371757B2

## CPC

- G01R 31/389: Measuring internal impedance, internal conductance or related variables
- G01R 31/3648: {comprising digital calculation means, e.g. for performing an algorithm}
- G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables
- G01R 31/385: Arrangements for measuring battery or accumulator variables (for monitoring G01R31/382)
- G01R 31/392: Determining battery ageing or deterioration, e.g. state of health
- H01M 10/4285: {Testing apparatus}
- 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)
- H02J 7/82: Control of state of charge [SOC]
- H02J 7/84: Control of state of health [SOH]
- Y02E 60/10: Energy storage using batteries
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## 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

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

An energy storage system comprising:
an energy storage device; and
the post-deterioration performance estimating apparatus according to claim 1.

### Claim 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.

### Claim 5 (depends on 4)

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.

### Claim 6 (depends on 4)

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