US 11,718,201 B2
Motor vehicle
Tatsuyuki Ohashi, Hamamatsu (JP); Mahmoud Abdelnaby Sayed Abdallah, Hamamatsu (JP); and Takaharu Takeshita, Nagoya (JP)
Assigned to Kabushiki Kaisha F.C.C., Hamamatsu (JP)
Filed by Kabushiki Kaisha F.C.C., Hamamatsu (JP)
Filed on Nov. 16, 2021, as Appl. No. 17/528,060.
Claims priority of application No. 2020-194412 (JP), filed on Nov. 24, 2020.
Prior Publication US 2022/0161685 A1, May 26, 2022
Int. Cl. B60L 58/20 (2019.01); B60L 7/16 (2006.01)
CPC B60L 58/20 (2019.02) [B60L 7/16 (2013.01); B60L 2200/12 (2013.01); B60L 2210/40 (2013.01); B60L 2240/423 (2013.01); B60L 2240/547 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A motor vehicle comprising:
a motor performing power driving and regeneration;
an inverter converts a direct current into an alternating current;
a power storage device supplies energy to the motor;
a power converter with a voltage step down function during the power driving and a voltage step up function during the regeneration; and
a circuit where the power converter, with the voltage step down function during the power driving, is connected to the power storage device,
during the power driving of the motor, the power converter steps down an output voltage of the power storage device to supply the energy from the power storage device to the inverter,
during the regeneration in the motor, the power converter steps up a DC voltage of the inverter to recover regenerated energy into the power storage device;
wherein the power storage device is a first power storage device having a high-voltage characteristic;
a second power storage device having a low-voltage characteristic;
an auxiliary device operating by using the second power storage device as a power supply,
wherein the second power storage device and the auxiliary device are connected to the power converter in the circuit in parallel to the inverter,
during charging from the first power storage device to the second power storage device, an output voltage of the first power storage device is stepped down to supply energy from the first power storage device to the second power storage device;
an accelerator operator controlling the motor to adjust a drive torque of a driving wheel; and
a start switch enabling the motor vehicle to travel,
wherein the energy is supplied from the first power storage device to the second power storage device when the accelerator operator is not operated, the start switch is ON, and a rotation speed of the motor is equal to or lower than a predetermined rotation speed.