Patent ID: 11865933
Assignee: BYD COMPANY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 18:
19. A power system, comprising an energy conversion device and a control circuit, wherein
the energy conversion device comprises a motor coil, a bridge arm converter, and a bidirectional bridge arm; wherein
the bridge arm converter is connected to the motor coil and the bidirectional bridge arm;
the motor coil, the bridge arm converter, and the bidirectional bridge arm are connected to an external charging port, the motor coil is connected between the external charging port and the bridge arm converter, and the bridge arm converter and the bidirectional bridge arm are connected to an external battery;
the motor coil, the bridge arm converter, and the external charging port form a direct current (DC) charging circuit for charging the external battery;
the motor coil, the bridge arm converter, the bidirectional bridge arm, and the external charging port form an alternating current (AC) charging circuit for charging the external battery; and
the motor coil, the bridge arm converter, and the external battery form a motor drive circuit;

a motor, comprising the motor coil;
a motor control circuit, comprising the bridge arm converter, wherein the bridge arm converter is connected to a first end of the motor coil, and a second end of the motor coil is connected to the external charging port;
an in-vehicle charging circuit, comprising the bidirectional bridge arm, wherein the bidirectional bridge arm is connected to the bridge arm converter in parallel, to form a first common end and a second common end, the first common end is connected to a first end of the external battery, the second common end is connected to a second end of the external battery, and the external charging port is connected to the second common end and the bidirectional bridge arm; and
the control circuit is configured to: control the DC charging circuit for charging the external battery, control the AC charging circuit for charging the external battery, and control the motor drive circuit formed by the motor coil, the bridge arm converter, and the external battery; and the DC charging circuit, the AC charging circuit, and the motor drive circuit share the motor coil and the bridge arm converter.