# US 10,310,021 B2 · Method for real time correction of ion concentration and Coulomb counting state-of-charge (SOC) in battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,310,021 B2 - Document ID: US10310021B2 - Status: Granted - Kind: B2 - Application number: 15/373,017 - Filed: 2016-12-08 - Published: 2017-06-15 - Granted: 2019-06-04 - Earliest claimed: 2015-12-11 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Piyush Madhukarrao Tagade; Krishnan Seethalakshmy Hariharan; Tae Won Song - Web page: https://patentgrep.com/patent/US10310021B2 ## CPC - G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables - G01R 35/005: {Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references (G01R33/0035, G01R35/002 take precedence)} - 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) - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A method includes estimating an average concentration of ions in electrodes of a battery and estimating a state-of-charge (SOC) of the battery by Coulomb counting, correcting the ion concentration based on a difference in predicted and measured cell voltages, and correcting the Coulomb counting SOC based on a relation between SOC estimated by Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages. ## Claims ### Claim 1 A processor-implemented method, comprising: estimating an average concentration of ions in electrodes of a battery and estimating a state-of-charge (SOC) of the battery by Coulomb counting; correcting the ion concentration based on a difference in predicted and measured cell voltages; and correcting the Coulomb counting SOC based on a relation between SOC estimated by the Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages. ### Claim 2 (depends on 1) The method of claim 1, wherein correcting the ion concentration based on the difference in the cell voltages comprises: obtaining a predicted cell voltage while estimating the average concentration of ions; obtaining a measured cell voltage from sensors placed in the battery; and computing the difference between the predicted cell voltage and the measured cell voltage. ### Claim 3 (depends on 2) The method of claim 2, wherein obtaining the predicted cell voltage comprises using an unscented Kalman filter (UKF). ### Claim 4 (depends on 1) The method of claim 1, wherein the ions in the electrodes are lithium ions. ### Claim 5 (depends on 1) The method of claim 1, wherein the Coulomb counting takes an initial SOC and a current sensor measurement as inputs. ### Claim 6 A battery management system, comprising: a processor configured to estimate an average concentration of ions in electrodes of the battery and estimate a state-of-charge (SOC) of the battery by Coulomb counting, correct the ion concentration based on a difference in predicted and measured cell voltages, and correct the Coulomb counting SOC based on a relation between SOC estimated by the Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages. ### Claim 7 (depends on 6) The battery management system of claim 6, further comprising a memory configured to store instructions, wherein the processor is further configured to execute the instructions to estimate the average concentration of ions in electrodes of the battery and estimate the state-of-charge (SOC) of the battery by Coulomb counting, correct the ion concentration based on a difference in predicted and measured cell voltages, and correct the Coulomb counting SOC based on the relation between SOC estimated by the Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages. ### Claim 8 (depends on 6) The battery management system of claim 6, wherein the processor comprises an estimator configured to estimate the average concentration of ions in electrodes of the battery and estimate the state-of-charge (SOC) of the battery by Coulomb counting; and a corrector configured to correct the ion concentration based on the difference in predicted and measured cell voltages, and correct the Coulomb counting SOC based on the relation between SOC estimated by the Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages. ### Claim 9 (depends on 8) The battery management system of claim 8, wherein the corrector is configured to correct the ion concentration based on a difference in cell voltages by: obtaining a predicted cell voltage while estimating the average concentration of ions; obtaining a measured cell voltage from sensors placed in the battery; and computing the difference between the predicted cell voltage and the measured cell voltage. ### Claim 10 (depends on 9) The battery management system of claim 9, wherein obtaining the predicted cell voltage comprises using an unscented Kalman filter (UKF). ### Claim 11 (depends on 8) The battery management system of claim 8, wherein the ions in the electrodes are lithium ions. ### Claim 12 (depends on 8) The battery management system of claim 8, wherein the Coulomb counting takes an initial SOC and a current sensor measurement as inputs. ### Claim 13 A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to estimate an average concentration of ions in electrodes of a battery and estimating a state-of-charge (SOC) of the battery by Coulomb counting; correct ion concentration based on a difference in predicted and measured cell voltages; and correct the Coulomb counting SOC based on a relation between SOC estimated by the Coulomb counting and the average concentration, and the difference in the predicted and measured cell voltages.