# US 11,029,363 B2 · Method and device for predicting battery life > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,363 B2 - Document ID: US11029363B2 - Status: Granted - Kind: B2 - Application number: 16/156,409 - Filed: 2018-10-10 - Published: 2019-04-18 - Granted: 2021-06-08 - Earliest claimed: 2017-10-12 - Assignees: Oci Company Ltd. - Applicants: OCI Company Ltd. - Inventors: MyungSup Um; HeeChang Ye - Web page: https://patentgrep.com/patent/US11029363B2 ## CPC - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - 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 31/374: with means for correcting the measurement for temperature or ageing - G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC - G01R 31/3835: involving only voltage measurements - G01R 31/3842: combining voltage and current measurements - G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery - G01R 31/385: Arrangements for measuring battery or accumulator variables (for monitoring G01R31/382) - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Provided is a device including an acquisition unit configured to obtain a time taken for a voltage level of a battery in a charge mode to change for each of a plurality of voltage sections, and a prediction unit configured to predict a state of health (SOH) of the battery based on ratio information determined by comparing the time obtained for each of the plurality of voltage sections with a reference time for each of the plurality of voltage sections. When the time taken for some voltage sections of the plurality of voltage sections is obtained by the acquisition unit, the prediction unit corrects the predicted SOH of the battery based on the time taken for the voltage level of the battery in a discharge mode to change. ## Claims ### Claim 1 A device comprising a processor configured to process life information of a battery, the processor comprising: an acquisition circuit configured to obtain a time taken for a voltage level of the battery in a charge mode to change for each of a plurality of voltage sections; and a prediction circuit configured to predict a state of health (SOH) of the battery based on ratio information determined by comparing the time obtained for each of the plurality of voltage sections with a reference time for each of the plurality of voltage sections, wherein when the time taken for some voltage sections of the plurality of voltage sections is obtained by the acquisition circuit, the prediction circuit is further configured to correct the predicted SOH of the battery based on the time taken for the voltage level of the battery in a discharge mode to change. ### Claim 2 (depends on 1) The device of claim 1, wherein the reference time for each of the plurality of voltage sections is a time taken for the voltage level of the battery in the charge mode to change during an initial cycle for each of the plurality of voltage sections. ### Claim 3 (depends on 1) The device of claim 1, wherein a time taken for the voltage level of the battery in the discharge mode to change is obtained for each of a plurality of discharge voltage sections, and each of the discharge voltage sections is determined as a voltage section in which a voltage decrease slope is smaller than a voltage decrease slope in an entire section. ### Claim 4 (depends on 3) The device of claim 3, wherein the discharge voltage sections comprises at least one section of a voltage section below 3.80 V and above 3.70 V, and a voltage section below 3.70 V and above 3.60 V. ### Claim 5 (depends on 1) The device of claim 1, wherein the prediction circuit is further configured to obtain a plurality of ratio values by dividing the time obtained for each of the plurality of voltage sections by the reference time for each of the plurality of voltage sections and predicts the SOH of the battery based on an average value of the obtained plurality of ratio values. ### Claim 6 (depends on 1) The device of claim 1, wherein the prediction circuit is further configured to sum two consecutive voltage sections of the plurality of voltage sections into one voltage section, and compares a time taken for the voltage level to change in the summed voltage section with a reference time corresponding to the summed voltage section to predict the SOH of the battery. ### Claim 7 (depends on 1) The device of claim 1, wherein the prediction circuit is further configured to corrects the SOH of the battery predicted after a cycle in which the battery is completely discharged, based on the SOH of the battery obtained in the cycle in which the battery is fully discharged. ### Claim 8 A method comprising: obtaining a time taken for a voltage level of a battery in a charge mode to change for each of a plurality of voltage sections; predicting a state of health (SOH) of the battery based on ratio information determined by comparing the time obtained for each of the plurality of voltage sections with a reference time for each of the plurality of voltage sections; and when the time taken for some voltage sections of the plurality of voltage sections is obtained, correcting the predicted SOH of the battery based on a time taken for the voltage level of the battery in a discharge mode to change. ### Claim 9 (depends on 8) The method of claim 8, wherein the reference time for each of the plurality of voltage sections is a time taken for the voltage level of the battery in the charge mode to change during an initial cycle for each of the plurality of voltage sections. ### Claim 10 (depends on 8) The method of claim 8, wherein a time taken for the voltage level of the battery in the discharge mode to change is obtained for each of discharge voltage sections, and each of the discharge voltage sections is determined as a voltage section in which a voltage decrease slope is smaller than a voltage decrease slope in an entire section. ### Claim 11 (depends on 10) The method of claim 10, wherein the discharge voltage sections comprises at least one section of a voltage section below 3.80 V and above 3.70 V, and a voltage section below 3.70 V and above 3.60 V. ### Claim 12 (depends on 8) The method of claim 8, wherein the predicting of the SOH of the battery comprises obtaining a plurality of ratio values by dividing the time obtained for each of the plurality of voltage sections by the reference time for each of the plurality of voltage sections and predicting the SOH of the battery based on an average value of the obtained plurality of ratio values. ### Claim 13 (depends on 8) The method of claim 8, wherein the predicting of the SOH of the battery comprises summing two consecutive voltage sections of the plurality of voltage sections into one voltage section, and comparing a time taken for the voltage level to change in the summed voltage section with a reference time corresponding to the summed voltage section to predict the SOH of the battery. ### Claim 14 (depends on 8) The method of claim 8, wherein the correcting of the predicted SOH of the battery comprises correcting the SOH of the battery predicted after a cycle in which the battery is completely discharged, based on the SOH of the battery obtained in the cycle in which the battery is fully discharged.