# US 2013/0154577 A1 · Full Charge Sensing Apparatus And Full Charge Sensing Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154577 A1 - Document ID: US20130154577A1 - Status: Published application - Kind: A1 - Application number: 13/769,636 - Filed: 2013-02-18 - Published: 2013-06-20 - Earliest claimed: 2010-12-20 - Assignees: Furukawa Automotive Systems Inc.; Furukawa Electric Co., Ltd. - Inventors: Noriyasu IWANE; Taiji MITSUYAMA; Shinichi NOMOTO; Mamichi TSUYUKI; Etsuzo SATO; Tamas MIHALFFY; Antal KOVATS - Web page: https://patentgrep.com/patent/US20130154577A1 ## CPC - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables - G01R 31/3842: combining voltage and current measurements - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 7/04: Regulation of charging current or voltage - H02J 7/825: {Detection of fully charged condition} - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 7/94: in response to battery current - 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 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - 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 full charge sensing apparatus for sensing a fully charged state of a secondary battery based on an equivalent circuit model of the secondary battery includes a measuring unit that measures a voltage and a current during charging of the secondary battery, a learning unit that performs a learning process on a plurality of parameters in the equivalent circuit model using a result of measurement of the measuring unit, and a determining unit that determines that the secondary battery is in a fully charged state in a case where, among the parameters on which the learning process has been performed by the learning unit, a parameter corresponding to a reaction resistance of the secondary battery is greater than a predetermined threshold. ## Claims ### Claim 1 A full charge sensing apparatus for sensing a fully charged state of a secondary battery based on an equivalent circuit model of the secondary battery, the apparatus comprising: a measuring unit that measures a voltage and a current during charging of the secondary battery; a learning unit that performs a learning process on a plurality of parameters in the equivalent circuit model using a result of measurement of the measuring unit; and a determining unit that determines that the secondary battery is in a fully charged state in a case where, among the parameters on which the learning process has been performed by the learning unit, a parameter corresponding to a reaction resistance of the secondary battery is greater than a predetermined threshold. ### Claim 2 (depends on 1) The full charge sensing apparatus according to claim 1, wherein one of the learning unit and the detecting unit corrects one of a value of the reaction resistance and the threshold based on a value of the current. ### Claim 3 (depends on 1) The full charge sensing apparatus according to claim 1, wherein one of the learning unit and the detecting unit corrects one of a value of the reaction resistance and the threshold based on a temperature of the secondary battery. ### Claim 4 (depends on 1) The full charge sensing apparatus according to claim 1, wherein one of the learning unit and the detecting unit corrects one of a value of the reaction resistance and the threshold based on a state of degradation of the secondary battery. ### Claim 5 (depends on 1) The full charge sensing apparatus according to claim 1, wherein the learning unit optimizes the plurality of parameters by a Kalman filter operation in such a manner that errors between values of the voltage and the current measured by the measuring unit and a response of the equivalent circuit model are minimized. ### Claim 6 (depends on 1) The full charge sensing apparatus according to claim 1, wherein the learning unit optimizes the plurality of parameters by a least square operation in such a manner that errors between values of the voltage and the current measured by the measuring unit and a response of the equivalent circuit model are minimized. ### Claim 7 (depends on 1) The full charge sensing apparatus according to claim 1, wherein the learning unit optimizes the plurality of parameters by a neural network in such a manner that errors between values of the voltage and the current measured by the measuring unit and a response of the equivalent circuit model are minimized. ### Claim 8 (depends on 1) The full charge sensing apparatus according to claim 1, wherein the learning unit optimizes the plurality of parameters by a support vector machine in such a manner that errors between values of the voltage and the current measured by the measuring unit and a response of the equivalent circuit model are minimized. ### Claim 9 (depends on 1) A secondary battery power source system having the full charge sensing apparatus according to claim 1. ### Claim 10 A full charge sensing method of sensing a fully charged state of a secondary battery based on an equivalent circuit model of the secondary battery, the method comprising: measuring a voltage and a current during charging of the secondary battery; performing a learning process on a plurality of parameter in the equivalent circuit model using a result of said measuring of a voltage and a current during charging of the secondary battery; and performing a determination in which the secondary battery is determined to be in a fully charged state in a case where a parameter corresponding to a reaction resistance of the secondary battery is greater than a predetermined threshold, the parameter corresponding to the reaction resistance of the secondary battery being one of the parameters on which the learning process has been performed. ### Claim 11 (depends on 10) The method according to claim 10 wherein said learning process is performed by a processor in cooperation with a memory. ### Claim 12 (depends on 10) The method according to claim 10 wherein said determination is performed by a processor in cooperation with a memory. ### Claim 13 (depends on 10) The method according to claim 10 wherein said learning process and said determination are performed by a processor in cooperation with a memory.