Techniques for wirelessly transferring energy to a vehicle are disclosed. An example method for wirelessly transferring energy to a vehicle according to the disclosure includes detecting a ripple frequency on a transmitter coil circuit, such that the ripple frequency is associated with a vehicle switch mode controller frequency of a switch mode controller in the vehicle, and providing an electrical current to a coil in the transmitter coil circuit based at least in part on the ripple frequency.

An alignment method for wireless charging of an electric vehicle includes identifying presence of a wireless power transmission pad during driving, estimating a distance to the wireless power transmission pad, performing a macroscopic alignment procedure according to the distance, and performing wireless charging based on the macroscopic alignment procedure being completed.

An alignment method for wireless charging of an electric vehicle includes identifying presence of a wireless power transmission pad during driving, estimating a distance to the wireless power transmission pad, performing a macroscopic alignment procedure according to the distance, and performing wireless charging based on the macroscopic alignment procedure being completed.

A microscopic alignment method for wireless charging of an electric vehicle, and an apparatus and system therefor. The microscopic alignment method includes determining whether the electric vehicle is stopped, based on the electric vehicle being stopped, making a request to the electric vehicle for generation of an induced current, measuring the induced current received through a wireless power transmission pad, performing fine alignment of the wireless power transmission pad based on the induced current, and based on the fine alignment being completed, transmitting wireless power via the wireless power transmission pad.

A microscopic alignment method for wireless charging of an electric vehicle, and an apparatus and system therefor. The microscopic alignment method includes determining whether the electric vehicle is stopped, based on the electric vehicle being stopped, making a request to the electric vehicle for generation of an induced current, measuring the induced current received through a wireless power transmission pad, performing fine alignment of the wireless power transmission pad based on the induced current, and based on the fine alignment being completed, transmitting wireless power via the wireless power transmission pad.

An access control device of a vehicle is configured to detect the spatial position of the access element of the vehicle safety unit relative to the vehicle via electromagnetically detecting the distances and angles between several low-frequency transmitting antennas of the vehicle safety unit and the low-frequency receiver of the access element. The access control device is also configured to detect the location position of an external induction charging unit relative to the vehicle via electromagnetically measuring the distance and angle between at least two transmitting antennas of several low-frequency transmitting antennas and at least one receiving antenna of the induction charging unit.

A wireless power-supply system (1) performing a wireless power supply between a vehicle (10) and a stop station (20), wherein the wireless power-supply system includes a heat-transfer device (30). The heat-transfer device (30) transfers heat generated due to the wireless power supply to the stop station (20) having high heat capacity from the vehicle (10) having low heat capacity. The heat-transfer device (30) includes a flexible heat-transfer member (32), in which the flexible heat-transfer member has tiltability in a moving direction of the vehicle (10).

An assembly and method are provided for detecting an object within a wireless charging region of an electric vehicle. The method includes applying by a controller, a voltage to the wireless charging region to generate a capacitance value and measuring by the controller, the capacitance value of an electromagnetic shield disposed on the underside of the vehicle. Further, the controller monitors the capacitance value of the electromagnetic shield; and the controller detects a change in the capacitance value when the object enters the wireless charging region.

A vehicle system includes a controller configured to, responsive to an alignment mode, disable a power rectifier configured to transfer charge between a secondary coil and battery, and enable a precision rectifier to output a voltage responsive to current induced in the secondary coil resulting from current through a corresponding primary coil, and responsive to the voltage exceeding a threshold, enable the power rectifier and disable the precision rectifier.

A coil alignment method performed in a coil alignment apparatus coupled to a VA controller includes: sensing magnetic field intensities induced from a ground assembly (GA) coil through a first auxiliary coil and a second auxiliary coil which are fixedly coupled to a VA coil; comparing a first magnetic field intensity sensed through the first auxiliary coil with a second magnetic field intensity sensed through the second auxiliary coil; moving the VA coil or the GA coil to a position where there is a predetermined difference or less between the first magnetic field intensity and the second magnetic field intensity; and moving at least one of the VA coil and the GA coil in a direction facing each other, so that a center point of the VA coil and a center point of the GA coil are located within a shortest distance of each other or within a certain error range of the shortest distance, while maintaining the predetermined difference or less between the first magnetic field intensity and the second magnetic field intensity.