US 12,257,906 B2
Vehicle power supply device and vehicle power supply method
Satoru Katoh, Nisshin (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Nov. 7, 2023, as Appl. No. 18/503,536.
Claims priority of application No. 2023-016176 (JP), filed on Feb. 6, 2023.
Prior Publication US 2024/0262208 A1, Aug. 8, 2024
Int. Cl. H02P 27/08 (2006.01); B60L 3/00 (2019.01); B60L 15/00 (2006.01); B60L 50/13 (2019.01); H02M 1/32 (2007.01); H02M 7/483 (2007.01); H02M 7/5387 (2007.01)
CPC B60L 3/003 (2013.01) [B60L 15/007 (2013.01); B60L 50/13 (2019.02); H02M 1/327 (2021.05); H02M 7/4833 (2021.05); H02M 7/53873 (2013.01); B60L 2240/421 (2013.01); B60L 2240/525 (2013.01); H02M 1/322 (2021.05)] 5 Claims
OG exemplary drawing
 
1. A vehicle power supply device comprising a power control unit and a plurality of resistors connected to the power control unit, wherein:
the power control unit includes
a capacitor,
a voltage sensor configured to measure a voltage of the capacitor,
a three-phase inverter connected in parallel with the capacitor, and
a control device connected to the voltage sensor and the three-phase inverter;
a positive terminal of each of the resistors is connected to a positive power line via any one of a plurality of positive switching elements provided on a positive side of individual phases of the three-phase inverter;
a negative terminal of each of the resistors is connected to a negative power line via any one of a plurality of negative switching elements provided on a negative side of the individual phases of the three-phase inverter;
the negative terminal is connected to the negative power line via the negative switching element of one of two phases different from a phase in which the positive switching element connected to the positive terminal is provided; and
the control device is configured to
turn ON both the positive switching element and the negative switching element associated with one resistor out of the plurality of resistors disabled in an initial state to enable the one resistor when a voltage value of the voltage sensor is equal to or larger than a predetermined value, and
disable the one resistor and turn ON both the positive switching element and the negative switching element associated with one other resistor out of the plurality of resistors to enable the one other resistor when a predetermined condition is satisfied.