Foreign matter non-blind area detection device for electric vehicle wireless charging system

Abstract

The invention discloses a foreign matter non-blind area detection device for an electric vehicle wireless charging system. The foreign matter non-blind area detection device comprises a resonance induction module and a detection module; the resonance induction module is arranged on the surface of a transmitting coil of a charging platform transmitting device; the resonance induction module comprises a first resonance induction unit and a second resonance induction unit which are arranged in parallel in a staggered manner; the detection circuit is connected with the first resonance induction unit and the second resonance induction unit, obtains actual resonance frequencies of the first resonance induction unit and the second resonance induction unit, and sends a charging stop signal to a power supply module of the charging platform transmitting device when a difference value between the actual resonance frequencies and a preset resonance frequency exceeds a preset value. The two resonance induction units which are arranged in parallel in a staggered mode are adopted to detect foreign matter, the problem that a detection blind area exists when only one coupling coil array is adoptedis solved, the precision of foreign matter detection during charging of an electric vehicle is improved, and the safety and stability of a wireless charging system of the electric vehicle are guaranteed.

Description

technical field [0001] The invention relates to the technical field of wireless charging control, in particular to a foreign object non-blind area detection device for a wireless charging system of an electric vehicle. Background technique [0002] In recent years, the electromagnetic coupling resonant wireless energy transmission technology is based on the principle of electromagnetic induction, without the need for charging wires to contact the charging equipment. It is convenient and quick to achieve long-distance and high-power energy transmission, which is very suitable for wireless charging of electric vehicles. [0003] The performance of the wireless charging method of the wireless charging system depends on the energy transfer rate, the operating frequency, the size and design of the transmitting coil and receiving coil coupling structure, and the distance between the magnetic structures. The flux density in the air gap at some locations can exceed 0.5 milliTesla an...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiment of the present invention is to provide a non-blind area detection device for foreign objects in the wireless charging system of electric vehicles. By using two resonant induction units arranged in parallel and staggered to detect foreign objects on the surface of the transmitting coil in the wireless charging system of electric vehicles, it overcomes the When only one coupling coil array is used, there is a problem of detection blind area, which improves the accuracy of foreign object detection during electric vehicle charging, and ensures the safety and stability of electric vehicle wireless charging.

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