Battery management method, storage medium, storage controller, and movable body

A battery management method comprising:

• detecting, over time, a value of a parameter of a battery by at least one of a temperature sensor, a voltage sensor, or a current sensor mounted on the battery or a vehicle on which the battery is mounted, the parameter comprising at least one of a temperature, a voltage, or a discharge current of the battery that reflects a state of deterioration of the battery;
• calculating, by processing circuitry of the battery or the vehicle, a state of charge (SOC) of the battery based on a voltage value detected by the voltage sensor and the discharge current detected by the current sensor;
• classifying, by the processing circuitry of the battery or the vehicle, a state of the battery defined by a combination of the SOC and either one of the discharge current or the temperature into a state category of a plurality of predetermined state categories, wherein the state category is formed by a sub-range of a plurality of sub-ranges of values of the SOC and either one of a sub-range of a plurality of sub-ranges of values of the discharge current, or a sub-range of a plurality of sub-ranges of values of the temperature;
• storing in a memory of the vehicle, as state history information, an amount of time of the state of the battery being classified into the state category and associated battery identification information, the battery identification information being associated with the battery for identifying the battery;
• transmitting, over a network, the stored state history information to a server;
• analyzing, by the server, the state of the deterioration of the battery based on amounts of time corresponding to the plurality of predetermined state categories and the associated battery identification information;
• and
• determining, by the server, that the battery is not usable when the amount of time corresponding to a state category that corresponds to a combination of a sub-range of the SOC that is lower than a predetermined SOC value or higher than a predetermined SOC value, and either one of a sub-range of the temperature lower than a predetermined temperature value or higher than a predetermined temperature value, or a sub-range of the discharge current higher than a predetermined discharge current value, exceeds a predetermined period of time.