BATTERY SYSTEM

摘要

A battery system includes: an alkali secondary battery in which a negative electrode open-circuit potential remains constant within a predetermined SOC range; a temperature sensor configured to detect a temperature of the battery; a current sensor; a voltage sensor; and a controller configured to set an upper limit power value that is discharged from the alkali secondary battery, the controller being configured to: calculate a negative electrode potential of the alkali secondary battery based on the negative electrode open-circuit potential, a resistance value of a negative electrode of the alkali secondary battery, the resistance value being specified from the temperature, and the current value; calculate a positive electrode potential of the alkali secondary battery based on the negative electrode potential and the voltage value; and reduce the upper limit power value below a reference power value when the positive electrode potential is equal to or lower than a threshold.

主权项

1. A battery system comprising:
an alkali secondary battery in which a negative electrode open-circuit potential remains constant within a predetermined SOC range; a temperature sensor configured to detect a temperature of the alkali secondary battery; a current sensor configured to detect a current value of the alkali secondary battery; a voltage sensor configured to detect a voltage value of the alkali secondary battery; and a controller configured to set an upper limit power value that is discharged from the alkali secondary battery, the controller being configured to calculate a negative electrode potential of the alkali secondary battery based on the negative electrode open-circuit potential, a resistance value of a negative electrode of the alkali secondary battery, the resistance value being specified from the temperature, and the current value, the controller being configured to calculate a positive electrode potential of the alkali secondary battery based on the negative electrode potential and the voltage value, and the controller being configured to reduce the upper limit power value below a reference power value when the positive electrode potential is equal to or lower than a threshold.