US 12,083,899 B2
Power supply system
Kenta Suzuki, Tokyo (JP); and Hirokazu Oguma, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Dec. 2, 2021, as Appl. No. 17/457,257.
Claims priority of application No. 2020-201116 (JP), filed on Dec. 3, 2020.
Prior Publication US 2022/0176823 A1, Jun. 9, 2022
Int. Cl. B60L 3/00 (2019.01); B60L 7/10 (2006.01); B60L 50/51 (2019.01); B60L 58/13 (2019.01); H01M 10/44 (2006.01); H02J 7/00 (2006.01)
CPC B60L 3/0046 (2013.01) [B60L 50/51 (2019.02); B60L 58/13 (2019.02); H01M 10/441 (2013.01); H02J 7/007 (2013.01); B60L 7/10 (2013.01); B60L 2210/10 (2013.01); H01M 2220/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A power supply system comprising:
a load circuit containing a rotary electrical machine coupled to a drive wheel;
a first electrical storage device;
a second electrical storage device having higher output weight density and lower energy weight density than the first electrical storage device;
a power circuit which connects the load circuit, the first electrical storage device and the second electrical storage device;
a first remaining amount parameter acquisition means for acquiring a first remaining amount parameter which increases with an increase in a remaining amount of the first electrical storage device and decreases with a decrease in the remaining amount of the first storage device;
a second remaining amount parameter acquisition means for acquiring a second remaining amount parameter which increases with an increase in a remaining amount of the second electrical storage device and decreases with a decrease in the remaining amount of the second storage device; and
a control device which controls flow of power between the first electrical storage device, the second electrical storage device and the rotary electrical machine, and flow of power from the first electrical storage device to the second electrical storage device, by operating the power circuit,
wherein the control device, in a case of the second remaining amount parameter being less than a second lower limit value, permits execution of power path control to supply power outputted from the first electrical storage device to the second electrical storage device, and sets the second lower limit value to a greater value as the first remaining amount parameter becomes smaller.