Patent ID: 11876396
Assignee: BYD COMPANY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 6:
7. A power battery charging method for a motor control circuit including a first switch module, a three-phase inverter, and a control module, wherein a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, midpoints of three phase legs of the three-phase inverter are respectively connected to three phase coils of the three-phase alternating current motor, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of the three phase coils, the control module is separately connected to the three-phase inverter, the first switch module, the three-phase alternating current motor, and the power supply module, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current, wherein the charging method comprises:
obtaining a voltage of the power supply module and a voltage of a power battery, and selecting a charging manner based on the voltage of the power supply module and the voltage of the power battery, wherein the charging manner comprises a boost charging manner and a direct charging manner; and
controlling the first switch module to close so that the power supply module outputs a direct current, and controlling the three-phase inverter so that the power supply module charges the power battery in the selected charging manner.