Patent ID: 11967840
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A power supply system comprising:
an alternating-current sweep unit that outputs alternating-current power from a U-phase battery string, a V-phase battery string, and a W-phase battery string that are Y-connected;
a first power supply circuit that converts output of a direct-current sweep unit to alternating-current power using an inverter and outputs the alternating-current power, the direct-current sweep unit including a first battery string; and
a control device that controls the alternating-current sweep unit and the first power supply circuit, wherein:
the U-phase battery string, the V-phase battery string, the W-phase battery string, and the first battery string each include multiple battery circuit modules connected in series;
each of the battery circuit modules includes
a battery,
an output terminal that outputs a voltage of the battery,
a first switch connected to the output terminal and connected in parallel with the battery, and
a second switch connected in series with the battery;

each of the battery circuit modules is configured in such a manner that the voltage of the battery is applied to the output terminal when the first switch is in an OFF state and the second switch is in an ON state;
the first power supply circuit and the alternating-current sweep unit are configured to be able to be electrically connected to an external power supply; and
an energy density of each of the batteries included in the U-phase battery string, the V-phase battery string, and the W-phase battery string is higher than an energy density of each of the batteries included in the first battery string.