Full charge capacity measuring device
The full charge capacity measuring device is a full charge capacity measuring device that measures a full charge capacity of a sub-battery provided for backup of a main battery that supplies electric power to an automatic operation system. The full charge capacity measuring device includes an acquisition unit that acquires a temperature of the sub-battery, a determination unit that determines whether or not the current temperature of the sub-battery is less than a lower limit temperature at which the automatic operation system can operate, and a measurement control unit that performs measurement control of the full charge capacity of the sub-battery when the current temperature is less than the lower limit temperature.
1 . A power supply system comprising:
a main battery configured to supply electric power to an autonomous driving system;
a sub-battery configured to be provided for backup of the main battery;
a converter configured to supply the electric power from the main battery to the sub-battery; and
a full charge capacity measuring device configured to measure a full charge capacity of the sub-battery, the full charge capacity measuring device including a processor, wherein
the processor is configured to:
acquire a temperature of the sub-battery;
determine whether a current temperature of the sub-battery is lower than a lowest temperature at which the autonomous driving system is operable; and
perform measurement control of the full charge capacity of the sub-battery in a case where the current temperature is lower than the lowest temperature, and
the converter is further configured to perform charging of the sub-battery until the temperature of the sub-battery reaches the lowest temperature, after the measurement of the full charge capacity of the sub-battery is completed.
2 . The power supply system according to claim 1 , wherein the processor is further configured to
calculate a first estimated time and a second estimated time, the first estimated time being a time taken for a measurement of the full charge capacity of the sub-battery to be completed with a charge and discharge value that is outputtable by the sub-battery at the current temperature, and the second estimated time being a time taken for the temperature of the sub-battery to increase from the current temperature to the lowest temperature by performing the measurement control of the full charge capacity, and
measure the full charge capacity of the sub-battery in a case where the first estimated time is less than the second estimated time.