Power management circuit for electric auxiliary vehicle

A power management circuit for an electric auxiliary vehicle, wherein the electric auxiliary vehicle comprises a battery, a motor, and a power receiving terminal, wherein the power management circuit comprises:

• a transformer, comprising a primary winding and a secondary winding;
• a primary circuit, electrically connected to the primary winding and the power receiving terminal;
• a first power transmission circuit, electrically connected to the secondary winding and the battery;
• a second power transmission circuit, electrically connected to the secondary winding, the battery, and the motor;
• and
• a controller, electrically connected to the primary circuit, the first power transmission circuit, and the second power transmission circuit, configured to:
• control the primary circuit and the first power transmission circuit in a first operating mode to provide a battery power of the battery to the power receiving terminal, and
• control the second power transmission circuit in a second operating mode, so that the second power transmission circuit uses a power of the motor to charge the battery.