Wireless charging device for electric vehicle and output control method thereof

Abstract

The invention provides a wireless charging device for an electric vehicle and an output control method thereof. The wireless charging device comprises a transmitting end and a receiving end, wherein the transmitting end is connected with a work frequency power supply and consists of a work frequency rectifying unit, a power factor correction unit, an inversion unit, a transmitting coil unit, a first communication unit and a first control unit; and the receiving end is connected with a battery system of the electric vehicle and consists of a receiving coil unit, a load compensation unit, a high frequency rectifying and filtering unit, a BOOST transformation unit, a second communication unit and a second control unit. The output control method comprises the following steps of: carrying out power-on and power-off control on the output power by the transmitting end, and carrying out continuous closed-loop control on output voltage or current by the receiving end according to the requirements of a battery system. The transmitting coil unit and the receiving coil unit are mutually coupled to carry out wireless energy transmission, and the first communication unit and the second communication unit are communicated in a wireless way.

Description

technical field [0001] The invention relates to a wireless charging device for an electric vehicle, in particular to a high-power, high-efficiency, medium-distance wireless charging device for an electric vehicle and an output control method thereof. Background technique [0002] The development of wireless charging technology for electric vehicles is of great significance. It can completely solve the shortcomings of traditional contact charging, which is easy to wear, easy to get an electric shock, and may cause unreliable and inconvenient power transmission after repeated plugging and unplugging. However, the wireless charging of electric vehicles requires at least several kW of output power, and the transmission distance is also relatively long, which poses a great challenge to the wireless charging technology of electric vehicles. [0003] Existing wireless charging products generally use electromagnetic induction for power transmission. This type of product has the char...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, and propose a wireless charging device for electric vehicles with large output power, high efficiency, medium transmission distance and easy implementation, so as to solve the problem of small transmission distance in most existing wireless charging devices. , low transmission power, low efficiency, difficult design and other disadvantages

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