US 12,466,278 B2
Power storage system
Yasushi Ogihara, Saitama (JP); and Yasuo Yamada, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Nov. 28, 2023, as Appl. No. 18/521,438.
Claims priority of application No. 2022-192139 (JP), filed on Nov. 30, 2022.
Prior Publication US 2024/0174099 A1, May 30, 2024
Int. Cl. H02P 27/08 (2006.01); B60L 53/22 (2019.01); B60L 58/18 (2019.01); H02J 7/00 (2006.01)
CPC B60L 53/22 (2019.02) [B60L 58/18 (2019.02); H02J 7/0063 (2013.01); B60L 2210/10 (2013.01); H02J 2207/20 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A power storage system, comprising:
a first battery including a first power storage, a second power storage, and a first switch unit configured to switch between a first voltage state in which the first power storage and the second power storage are connected in series and chargeable at a first voltage, and a second voltage state in which the first power storage and the second power storage are connected in parallel and chargeable at a second voltage;
a three-phase motor including coils of three phases connected at a neutral point, the three-phase motor being configured to be driven by electric power supplied from the first battery;
an inverter connected on an electric power transmission path between the first battery and the three-phase motor;
a DC power supply circuit connected to a first connection portion positioned on an electric power transmission path between the inverter and the first battery;
a branch circuit branched from the DC power supply circuit on a positive electrode side of the DC power supply circuit, and connected to a coil of any one phase among the coils of three phases;
a capacitor having one end and an other end, the one end being connected to an electric power supply circuit, which connects the inverter and the first battery, at a negative electrode side, and the other end being connected to the branch circuit or the electric power supply circuit at a positive electrode side;
a pre-charge circuit connected, between the inverter and the first connection portion of the DC power supply circuit, to an electric power transmission path between the inverter and the first battery;
a converter connected to the pre-charge circuit; and
a second battery connected to the converter and having a voltage lower than the first voltage and the second voltage.