Wireless charging, alignment and metal foreign body detection system of electric automobile and method thereof

Abstract

The invention discloses a wireless charging, alignment and metal foreign body detection system of an electric automobile and a method thereof. The detection system comprises a transmitting coil, a receiving coil, a probe, a signal conditioning module and a control module connected with the signal conditioning module, wherein the transmitting coil is connected with the output end of a wireless charging and transmitting device on the ground surface of a parking lot, the receiving coil is connected with the input end of a wireless electric energy receiving device of an electric automobile chassis and is mutually coupled with the transmitting coil, and the probe is laid on the surface of the transmitting coil and is mutually coupled with the transmitting coil and the receiving coil. The probe is of an axis-symmetric structure and is composed of two coils equal in size and turn number and opposite in winding direction. The probe is consistent with the boundary of the transmitting coil in size. The signal conditioning module is used for receiving voltage signals output by two output ends of the probe and conducting amplification, filtration and peak-holding processing on the two signals output by the two output ends. The control module is used for obtaining the difference of the two received voltage signals and comparing the obtained voltage signal difference value with a preset voltage threshold value.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to an electric vehicle wireless charging alignment and metal foreign object detection system and method thereof. Background technique [0002] The potential of electric vehicles (EVs) to have zero emissions and not rely on fossil fuels has received widespread attention from governments around the world, and cars have entered the electric era. In addition to government subsidies and strong support, relevant automobile manufacturers have also begun to pay attention to the future development of electric vehicles, and continue to invest funds and technologies in the field of electric vehicles. According to the Ministry of Industry and Information Technology's electric vehicle development strategy research report, by 2030, the number of electric vehicles in the country will reach 6 million. [0003] The existing electric vehicle charging methods mainly include: one is wired ...

AI Technical Summary

Problems solved by technology

Inaccurate coil alignment before electric vehicle charging will reduce charging efficiency, and excessive offset will directly result in failure to charge

Metal foreign matter is mixed in during the charging process, and the metal heats up sharply due to the eddy current effect, which poses a safety hazard

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