Vehicle power supply device and door latch device
AssigneeMINEBEA MITSUMI Inc.
InventorsMasakazu Nakato, Yusuke Takada
Life of this patent
Estimating the term…
Abstract
A vehicle power supply device includes a backup power supply to which power is supplied from a battery mounted in the vehicle, a boost unit that boosts a voltage of the backup power supply to a boost voltage, a motor drive unit that is connected to the battery and the boost unit and is capable of driving an electric motor by being supplied with power from either the battery or the boost unit, whichever has a higher voltage, and a control unit that controls operation of the boost unit. When it is determined that a predetermined boost condition is satisfied, the control unit controls the boost unit to boost the voltage of the backup power supply to a voltage higher than a rated voltage of the battery.
Claims8
A vehicle power supply device comprising:
- a backup power supply to which power is supplied from a battery mounted in a vehicle;
- a boost unit that boosts a voltage of the backup power supply to a boost voltage;
- a motor drive unit that is connected to the battery and the boost unit and is capable of driving an electric motor by being supplied with power from either the battery or the boost unit, whichever has a higher voltage;
- and
- a control unit that controls operation of the boost unit, wherein
- when it is determined that a predetermined boost condition, which includes whether or not the voltage of the battery is normal, is satisfied, the control unit controls the boost unit to boost the voltage of the backup power supply to a voltage higher than a rated voltage of the battery and thus the motor is supplied with power from the backup power supply, and
- when it is determined that the predetermined boost condition is not satisfied, the control unit controls the boost unit to boost the voltage of the backup power supply to a voltage lower than the rated voltage of the battery and equal to or higher than a minimum operating voltage of the electric motor and thus the motor is supplied with power from the backup power supply.
Dependencies are inferred from the claim text.