Wireless charging alignment method and apparatus, wireless charging system, and electric vehicle

A wireless charging alignment method, comprising:

• detecting a first induction signal of a power receive coil in a positioning magnetic field generated by a power transmit coil;
• detecting a second induction signal of a location detection coil in the positioning magnetic field;
• and
• determining a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal, wherein
• the power receive coil is configured to exchange power with a power transmit coil through electromagnetic mutual inductance.

A wireless charging system, comprising:

• a power transmit device;
• and
• a power receive device, wherein at least one of the power transmit device and the power receive device includes a wireless charging alignment apparatus, wherein the wireless charging alignment apparatus comprises:
• a power receive coil,
• a location detection coil,
• a first detection circuit,
• a second detection circuit, and
• a location determining circuit, wherein
• the power receive coil is configured to exchange power with a power transmit coil through electromagnetic mutual inductance;
• the first detection circuit is configured to detect a first induction signal of the power receive coil in a positioning magnetic field generated by the power transmit coil;
• the second detection circuit is configured to detect a second induction signal of a location detection coil in the positioning magnetic field;
• and
• the location determining circuit is configured to determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal.

An electric vehicle, comprising:

• a wireless charging alignment apparatus, wherein the wireless charging alignment apparatus comprises:
• a power receive coil,
• a location detection coil,
• a first detection circuit,
• a second detection circuit, and
• a location determining circuit, wherein
• the power receive coil is configured to exchange power with a power transmit coil through electromagnetic mutual inductance;
• the first detection circuit is configured to detect a first induction signal of the power receive coil in a positioning magnetic field generated by the power transmit coil;
• the second detection circuit is configured to detect a second induction signal of a location detection coil in the positioning magnetic field;
• and
• the location determining circuit is configured to determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal.