Electric vehicle wireless charging method capable of positioning according to equivalent inductance and charging device

Abstract

The invention discloses an electric vehicle wireless charging method capable of positioning according to equivalent inductance. The electric vehicle wireless charging method comprises the following steps: moving a transmitting terminal coil to an optimized starting position; adopting an LCR electric bridge to measure and compare the equivalent inductance at the two ends of the transmitting terminal coil before and after movement so as to judge whether the transmitting terminal coil and a receiving terminal coil reach a better coupling state, and horizontally moving the transmitting terminal coil; and moving the transmitting terminal coil in the vertical direction, and stopping moving the transmitting terminal coil when the pressure of the transmitting terminal coil is increased. A chargingdevice comprises a coil holder, a lifting table, a telescopic rack, a base and a guide rail and further comprises the transmitting terminal coil, a controller, an X-axis drive motor, a Y-axis drive motor, a perpendicular telescopic mechanism and the LCR electric bridge. According to the electric vehicle wireless charging method, the equivalent inductance is measured to adjust the position of thetransmitting terminal coil, the complexity is low, the calculated amount is small and implementation is easy; before charging, the charging device moves the transmitting terminal coil to the optimizedposition in the horizontal and vertical direction, and the charging device is simple in structure, high in reliability and easy to mount and deploy.

Description

technical field [0001] The invention belongs to the field of electric vehicle charging, and in particular relates to a wireless charging method and a charging device for electric vehicles positioned according to equivalent inductance. Background technique [0002] At present, the wireless charging technology of electric vehicles is gradually mature; however, because the location of the driver when parking in the charging parking space is very random, and the spatial position of the coil at the receiving end and the coil at the transmitting end is usually not adjustable, resulting in low charging efficiency and large energy loss. [0003] After the wireless charging electric vehicle is parked and before starting to charge, the position of the transmitter coil is adjusted to make the transmitter coil and the receiver coil better coupled, which can improve the charging efficiency. The Chinese patent "Electric Vehicle Wireless Charging Positioning Method" with the application nu...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is that the existing algorithm for optimizing the position of the coil at the transmitting end to improve the wireless charging efficiency of electric vehicles has high complexity and a large amount of calculation. The accurate charging device has a complex structure, and it is difficult to achieve coil alignment when the detection sensor is unstable, and reliability is a problem

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