# US 10,372,183 B2 · Storage-battery evaluation device, energy storage system, and storage-battery evaluation method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,372,183 B2 - Document ID: US10372183B2 - Status: Granted - Kind: B2 - Application number: 15/065,290 - Filed: 2016-03-09 - Published: 2017-02-02 - Granted: 2019-08-06 - Earliest claimed: 2015-07-31 - Assignees: Kabushiki Kaisha Toshiba - Applicants: Kabushiki Kaisha Toshiba - Inventors: Takahiro Yamamoto; Shinichiro Kosugi; Ryosuke Takeuchi; Masatake Sakuma; Takahisa Wada; Toru Ezawa; Takenori Kobayashi - Web page: https://patentgrep.com/patent/US10372183B2 ## CPC - G06F 1/28: Supervision thereof, e.g. detecting power-supply failure by out of limits supervision - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - G01R 31/3842: combining voltage and current measurements - Y02E 60/10: Energy storage using batteries - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract According to one embodiment, a storage-battery evaluation device includes: a data generator and a deterioration evaluator. The data generator generates a plurality of data items including charge amounts and voltage values of an energy storage device based on current values and the voltage values measured from the energy storage device, the energy storage device being subjected to charge/discharge control in accordance with charge/discharge command values. The deterioration evaluator evaluates a deterioration state of the energy storage device based on a distribution of the voltage values included in the data items the charge amounts of which belong to a first charge-amount range when it is detected that a distribution of first charge/discharge command values satisfies a predetermined condition, the first charge/discharge command values being the charge/discharge command values at which the data items the charge amounts of which belong to the first charge-amount range is obtained. ## Claims ### Claim 1 A storage-battery evaluation device comprising: a first circuit configured to: receive a plurality of charge/discharge command values instructing charge/discharge of electric power for an energy storage device, receive voltage values measured at the energy storage device subjected to charge/discharge by execution of the plurality of charge/discharge command values, and generate corresponding data including voltages values and charge amounts of the energy storage device based on the received voltage values; and a second circuit configured to: specify first charge/discharge command values of the plurality of charge/discharge command values, wherein execution of the first charge/discharge command values results in the charge amount of the energy storage device falling within a first charge-amount range, and the first charge-amount range corresponds to part of a charge-amount range of the energy storage device, obtain information indicating whether a first distribution of a relation between charge/discharge command values and frequencies based on the first charge/discharge command values satisfies a predetermined condition regarding a frequency of charge/discharge command values, specify, if the predetermined condition is satisfied, voltage values corresponding to charge amounts belonging to the first charge-amount range, based on the corresponding data, and specify a deterioration state of the energy storage device based on a second distribution of a relation between voltage values and frequencies based on the specified voltage values. ### Claim 2 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the second circuit obtains information indicating whether the frequency distribution is equivalent to a reference distribution of a relation between charge/discharge command values and frequencies thereof, and, when the first frequency is equivalent to the reference distribution, determines that the predetermined condition is satisfied. ### Claim 3 (depends on 2) The storage-battery evaluation device according to claim 2, wherein the second circuit carries out a t-test to obtain the information indicating whether the first distribution is equivalent to the reference distribution. ### Claim 4 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the second distribution is a characteristic of variation in voltage values; wherein the second circuit specifies the deterioration state of the energy storage device based on the characteristic calculated. ### Claim 5 (depends on 4) The storage-battery evaluation device according to claim 4, wherein the second circuit acquires a deterioration state value of the energy storage device based on the calculated characteristic and deterioration-state evaluation data associating characteristic of variation in voltage values with deterioration state values of the energy storage device, and specifies a deterioration state of the energy storage device based on the deterioration state value. ### Claim 6 (depends on 4) The storage-battery evaluation device according to claim 4, wherein the characteristic is standard deviation or variance of the voltage values or a value based on one of the standard deviation or the variance. ### Claim 7 (depends on 4) The storage-battery evaluation device according to claim 4, wherein the second circuit calculates the characteristic by further using temperature information on the energy storage device. ### Claim 8 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the charge/discharge command value specifies a charge/discharge electric-power value, and the first distribution is a distribution of a relation between differential values of the first charge/discharge command values by time and frequencies thereof. ### Claim 9 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the second circuit transmits information corresponding to the deterioration state of the energy storage device to a monitor system for the energy storage device via a communication network. ### Claim 10 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the energy storage device is: a cell(s); a hardware module(s) connecting the plurality of cells in series, in parallel, or in series and parallel; a battery board(s) connecting the plurality of hardware modules in series, in parallel, or in series and parallel; or a battery array connecting the plurality of battery boards in series, in parallel, or in series and parallel. ### Claim 11 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the second circuit generates the first distribution based on the first charge/discharge command values. ### Claim 12 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the first distribution is a normal distribution approximating frequencies of the first charge/discharge command values. ### Claim 13 (depends on 1) The storage-battery evaluation device according to claim 1, wherein the second circuit determines whether a number of the corresponding data belonging to the first charge-amount range is larger than a predetermined value, and when the number is larger than the predetermined value, the second circuit specifies the first charge/discharge command values. ### Claim 14 A storage-battery evaluation device comprising: a storage battery comprising at least one battery board including a plurality module each including a plurality of cells; a charge/discharge controlling circuit to receiver a plurality of charge/discharge command values instructing charge/discharge of electric power for an energy storage device and perform charge/discharge control for the storage battery in accordance with the plurality of charge/discharge command values; a first circuit configured to: receive voltage values measured at the storage battery at a time of execution of the plurality of charge/discharge command values, and generate corresponding data including voltages values and charge amounts of the storage battery based on the received voltage values; and a second circuit configured to: specify first charge/discharge command values of the plurality of charge/discharge command values, wherein execution of the first charge/discharge command values results in the charge amounts of the energy storage device falling within a first charge-amount range, and the first charge-amount range corresponds to part of a charge-amount range of the energy storage device, obtain information indicating whether a first distribution of a relation between charge/discharge command values and frequencies based on the first charge/discharge command values satisfies a predetermined condition regarding a frequency of charge/discharge command values, specify, if the predetermined condition is satisfied, voltage values corresponding to charge amounts belonging to the first charge-amount range, based on the corresponding data, and specify a deterioration state of the energy storage device using a second distribution of a relation between voltage values and frequencies based on the specified voltage values. ### Claim 15 A storage-battery evaluation method comprising: receiving a plurality of charge/discharge command values instructing charge/discharge of electric power for an energy storage device, receive voltage values measured at the energy storage device subjected to charge/discharge at a time of execution of the plurality of charge/discharge command values; generating corresponding data including voltages values and charge amounts of the energy storage device based on the received voltage values; specifying first charge/discharge command values of the plurality of charge/discharge command values, wherein execution of the first charge/discharge command values results in the charge amounts of the energy storage device falling within a first charge-amount range, and the first charge-amount range corresponds to part of a charge-amount range of the energy storage device: obtaining information indicating whether a first distribution of a relation between charge/discharge command values and frequencies based on the first charge/discharge command values satisfies a predetermined condition regarding a frequency of charge/discharge command values; specifying, if the predetermined condition is satisfied, voltage values corresponding to charge amounts belonging to the first charge-amount range, based on the corresponding data; and specifying a deterioration state of the energy storage device using a second distribution of a relation between voltage values and frequencies based on the specified voltage values.