# US 2018/0024199 A1 · Device and method for estimating state of battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024199 A1 - Document ID: US20180024199A1 - Status: Published application - Kind: A1 - Application number: 15/541,613 - Filed: 2016-01-28 - Published: 2018-01-25 - Earliest claimed: 2015-01-28 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Hyunchul LEE; Jongmin PARK; Kiwook JANG; Jongbum LEE - Web page: https://patentgrep.com/patent/US20180024199A1 ## CPC - G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables - G01R 31/3842: combining voltage and current measurements - G01R 31/28: Testing of electronic circuits, e.g. by signal tracer ({EMC, EMP or similar testing of electronic circuits G01R31/002;} testing for short-circuits, discontinuities, leakage or incorrect line connection G01R31/50; checking computers {or computer components} G06F11/00; checking static stores for correct operation G11C29/00 {; testing receivers or transmitters of transmission systems H04B17/00}) - G01R 31/2812: {Checking for open circuits or shorts, e.g. solder bridges; Testing conductivity, resistivity or impedance (of connections G01R31/66)} - G01R 31/36: Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] - G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract The present invention relates to an apparatus and a method for estimating a state of a battery, and more particularly, an apparatus for estimating a state of a battery includes: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage and a temperature of the battery; a first SOH estimating unit estimating a first state of health of the battery based on the first SOC and the current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery. ## Claims ### Claim 1 An apparatus for estimating a state of a battery, the apparatus comprising: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage (OCV) and a temperature of the battery; a first SOH estimating unit estimating a first state of health (SOH) of the battery based on the first SOC and current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery. ### Claim 2 (depends on 1) The apparatus for estimating a state of a battery of claim 1, wherein when the second SOC estimating unit receives the first SOH of the battery, the second SOC estimating unit estimates the second SOC of the battery based on the first SOH, the charging/discharging voltage, the temperature, and the current of the battery. ### Claim 3 (depends on 1) The apparatus for estimating a state of a battery of claim 1, further comprising: an OCV measuring unit measuring the OCV of the battery after a conduction time of the battery passes a predetermined time. ### Claim 4 (depends on 1) The apparatus for estimating a state of a battery of claim 1, wherein the first SOH estimating unit estimates the first SOH of the battery by using a first SOC change value of the battery and a current integration value of the battery. ### Claim 5 (depends on 1) The apparatus for estimating a state of a battery of claim 1, wherein the second SOC estimating unit estimates the second SOC of the battery by using a current integration method. ### Claim 6 (depends on 1) The apparatus for estimating a state of a battery of claim 1, further comprising: a setting unit setting the second SOC and the first SOH of the battery as a final SOC and a final SOH of the battery, respectively. ### Claim 7 (depends on 1) A battery management system comprising: the apparatus for estimating a state of a battery of claim 1. ### Claim 8 A method for estimating a state of a battery, the method comprising: estimating, by a first SOC estimating unit, a first SOC of the battery based on OCV and a temperature of the battery; estimating, by a first SOH estimating unit, a first SOH of the battery based on the first SOC and current of the battery; and estimating, by a second SOC estimating unit, a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery. ### Claim 9 (depends on 8) The method for estimating a state of a battery of claim 8, wherein the estimating of the second SOC of the battery includes estimating, by the second SOC estimating unit, the second SOC of the battery based on the first SOH, the charging/discharging voltage, the temperature, and the current of the battery when the second SOC estimating unit receives the first SOH of the battery. ### Claim 10 (depends on 8) The method for estimating a state of a battery of claim 8, further comprising: measuring, by an OCV measuring unit, the OCV of the battery after a conduction time of the battery passes a predetermined time. ### Claim 11 (depends on 8) The method for estimating a state of a battery of claim 8, wherein the estimating of the first SOH of the battery includes estimating, by the first SOH estimating unit, the first SOH of the battery by using a first SOC change value of the battery and a current integration value of the battery. ### Claim 12 (depends on 8) The method for estimating a state of a battery of claim 8, wherein the estimating of the second SOC of the battery further includes estimating, by the second SOC estimating unit, the second SOC of the battery by using a current integration method. ### Claim 13 (depends on 8) The method for estimating a state of a battery of claim 8, further comprising: setting, by a setting unit, the second SOC and the first SOH of the battery as a final SOC and a final SOH of the battery, respectively.