US 11,897,363 B2
Vehicle driving system and vehicle
Atsushi Sugihara, Toyota (JP); Shizuka Masuoka, Nagoya (JP); and Kodai Nagano, Nagoya (JP)
Assigned to Prime Planet Energy & Solutions, Inc., Tokyo (JP)
Filed by PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed on Dec. 6, 2021, as Appl. No. 17/542,606.
Claims priority of application No. 2020-203620 (JP), filed on Dec. 8, 2020.
Prior Publication US 2022/0176847 A1, Jun. 9, 2022
Int. Cl. H02J 7/00 (2006.01); B60L 58/12 (2019.01); B60L 58/18 (2019.01); H02J 7/14 (2006.01); H02J 7/34 (2006.01); B60L 58/13 (2019.01); B60K 6/26 (2007.10)
CPC B60L 58/12 (2019.02) [B60L 58/13 (2019.02); B60L 58/18 (2019.02); H02J 7/0048 (2020.01); H02J 7/1423 (2013.01); H02J 7/342 (2020.01); B60K 6/26 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A vehicle driving system comprising:
a first battery;
a second battery;
a drive motor-generator connected to the first battery and the second battery via respective relays;
a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply,
wherein
the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C;
the second battery has a higher capacity than the first battery; and
a controller configured to:
when the power receiving unit is connected to the external power supply,
cause the first battery to be charged if the state of charge of the first battery is lower than a predetermined SOC, and
cause the second battery to be charged if the state of charge of the first battery is higher than or equal to the predetermined SOC; and
when regenerative power is output from the drive motor-generator,
cause the regenerative power to be input to the first battery if the state of charge of the first battery is lower than a predetermined SOC, and
cause the regenerative power to be input to the second battery if the state of charge of the first battery is higher than or equal to the predetermined SOC.