# US 2024/0201276 A1 · Method of diagnosing redundant power supply and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201276 A1 - Document ID: US20240201276A1 - Status: Published application - Kind: A1 - Application number: 18/480,025 - Filed: 2023-10-03 - Published: 2024-06-20 - Earliest claimed: 2022-12-15 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Naoki TSUDA - Web page: https://patentgrep.com/patent/US20240201276A1 ## CPC - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - B60R 16/033: characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) - G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables - G01R 31/389: Measuring internal impedance, internal conductance or related variables - G07C 5/0808: {Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005)} - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - 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) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - 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 for diagnosing a redundant power supply executed by a computer of an apparatus for diagnosing a state of a battery mounted on a vehicle, the method comprising the steps of: performing a discharge process for discharging a battery according to a predetermined discharge pattern; performing a deterioration diagnosis of the battery when the first information obtained by the discharge process satisfies a predetermined condition; estimating an internal resistance value of the battery based on the second information acquired at the time of performing the latest diagnosis satisfying the predetermined condition if the first information does not satisfy the predetermined condition; and determining a state of the battery using the estimated internal resistance value of the battery. ## Claims ### Claim 1 A method of diagnosing a redundant power supply executed by a computer of a device that diagnoses a state of a battery mounted on a vehicle, the method comprising: a step of performing a discharge process for discharging by a predetermined discharge pattern from the battery; a step of performing a deterioration diagnosis of the battery when first information obtained by the discharge process satisfies a predetermined condition; a step of estimating an internal resistance value of the battery based on second information acquired at the time of the latest diagnosis satisfying the predetermined condition, when the first information does not satisfy the predetermined condition; and a step of determining the state of the battery using the estimated internal resistance value of the battery. ### Claim 2 (depends on 1) The method according to claim 1, wherein: the first information is an average value of an outflow current of the battery in a discharge period; and the predetermined condition is that the average value is not equal to or greater than a first threshold value. ### Claim 3 (depends on 1) The method according to claim 1, wherein: the first information is an outflow current of the battery at a discharge end time point at which a discharge period has elapsed; and the predetermined condition is that the outflow current is not equal to or greater than a second threshold value. ### Claim 4 (depends on 1) The method according to claim 1, wherein the second information includes the internal resistance value of the battery and an elapsed time from a start time when the battery is used to a present time. ### Claim 5 (depends on 1) The method according to claim 1, wherein the determination step derives, from the internal resistance value of the battery estimated in the estimation step, power that is able to be output from the battery, and determines that the battery is normal when the power that is able to be output is equal to or greater than a third threshold value. ### Claim 6 A non-transitory storage medium storing a program executed by a computer of a device that diagnoses a state of a battery mounted on a vehicle, the program comprising: a step of performing a discharge process for discharging by a predetermined discharge pattern from the battery; a step of performing a deterioration diagnosis of the battery when first information obtained by the discharge process satisfies a predetermined condition; a step of estimating an internal resistance value of the battery based on second information acquired at the time of the latest diagnosis satisfying the predetermined condition, when the first information does not satisfy the predetermined condition; and a step of determining the state of the battery using the estimated internal resistance value of the battery.