Patent ID: 11936226
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  G  Y | IPC B  G  H

Claim 11:
12. A non-transitory computer readable medium storing a control program that when executed by a computer causes the computer to perform a method, the method comprising:
acquiring a state of a battery mounted on a vehicle capable of autonomous driving;
estimating a full charge capacity of the battery by a first estimation method including:
starting a charging process of charging the battery, and
estimating the full charge capacity of the battery based on based on an accumulated current value obtained by accumulating a charging current of the battery obtained by performing the charging process;

estimating the full charge capacity of the battery by a second estimation method without starting the charging process and based on aging deterioration data showing a deterioration state of the battery with aging;
selecting one of the first estimation method and the second estimation method based on the state of the battery;
measuring an elapsed period that is a period that has elapsed since the full charge capacity of the battery was estimated a last time;
acquiring a temperature of the battery as the state;
acquiring vehicle information indicating whether the vehicle is in a state of manual driving or a state of autonomous driving;
estimating the full charge capacity of the battery by selecting the first estimation method when:
the temperature of the battery is equal to or higher than a first temperature,
the elapsed period is equal to or longer than a first period,
a state of charge of the battery is less than a first state of charge,
the vehicle is in the state of manual driving as opposed to the state of autonomous driving,
the estimation occurs within a single continuous operation period, and
an open circuit voltage of the battery is equal to or less than a first voltage;

estimating the full charge capacity of the battery by selecting the second estimation method when the temperature of the battery is lower than the first temperature and the elapsed period is equal to or longer than a second period longer than the first period; and
not estimating the full charge capacity of the battery when:
the temperature of the battery is equal to or higher than the first temperature,
the elapsed period is equal to or longer than the first period,
the state of charge of the battery is not less than the first state of charge,
the vehicle is in the state of autonomous driving as opposed to the state of manual driving,
the estimation has previously occurred within the single continuous operation period, and
the open circuit voltage of the battery is not equal to or less than the first voltage.