A backup battery control module configured to supply electric power from a backup battery to a load when electric power supply from a main battery to the load is cut off. The backup battery control module is configured to: measure an open circuit voltage of the backup battery in a state in which an ignition switch is off; derive, based on a measured open circuit voltage, an already charged rate of the backup battery; measure an internal resistance of the backup battery in a state in which the ignition switch is off; derive a deterioration degree of the backup battery based on a measured internal resistance; derive a target charging rate based on the deterioration degree; and charge the backup battery until the target charging rate is reached in a case in which it is determined that the already charged rate is smaller than the target charging rate.
BACKUP BATTERY CONTROL MODULE AND BACKUP BATTERY CONTROL SYSTEM
RESERVEBATTERIESTEUERMODUL UND RESERVEBATTERIESTEUERUNGSSYSTEM
MODULE DE COMMANDE DE BATTERIE DE SECOURS ET SYSTÈME DE COMMANDE DE BATTERIE DE SECOURS
2024-07-10
Patent
Electronic Resource
English
BACKUP BATTERY CONTROL MODULE AND BACKUP BATTERY CONTROL SYSTEM
European Patent Office | 2022
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