Power wireless transmission coupling coil, device and vehicle wireless charging system

Abstract

The invention discloses a power wireless transmission coupling coil and device. The power wireless transmission coupling coil comprises a first coupling assembly and a second coupling assembly, the first coupling assembly comprises a first coil and a second coil which are located on the same plane and are of an annular structure. The second coupling assembly comprises a third coil and a fourth coil which are arranged in parallel, are of an annular structure, are arranged on the same side of the first coupling assembly and are perpendicular to the plane where the third coil and the fourth coilare located. The invention further discloses a vehicle wireless charging system. Other coils which have the same or opposite winding directions and are perpendicular to a magnetic field generated by the planar coils are additionally arranged on the basis of the two planar coils which are arranged in parallel, so that the coupling capacity of the whole device in the opposite process and the anti-offset capacity in the direction parallel to the plane where the planar coils are located are improved.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a coupling coil for wireless power transmission, a device and a wireless charging system for vehicles. Background technique [0002] With the continuous development of charging technology, it has developed into two methods: wired charging and wireless charging. Taking electric vehicles as an example, in the existing charging stations and charging piles, electric vehicles obtain electric energy through direct contact between charging cables and charging plugs. The charging process requires manual plugging and unplugging. Due to the fixed position of the charging socket and the limited length , which greatly reduces the flexibility of electric vehicle charging. At the same time, the exposed charging cables and plugs also make the wired charging system have potential dangers of leakage and electrical breakdown, which are prone to contact sparks, resulting in elec...

AI Technical Summary

Problems solved by technology

Taking electric vehicles as an example, in the existing charging stations and charging piles, electric vehicles obtain electric energy through direct contact between charging cables and charging plugs. The charging process requires manual plugging and unplugging. Due to the fixed position of the charging socket and the limited length , which greatly reduces the flexibility of electric vehicle charging. At the same time, the exposed charging cables and plugs also make the wired charging system have potential dangers of leakage and electrical breakdown, which are prone to contact sparks, resulting in electrical corrosion and wear of plugs and sockets. , the security needs to be further improved

[0003] The coupling coils in the existing wireless charging system for vehicles generally include circular coils, rectangular coils, and double D-shaped coils. For circular and rectangular coils, their anti-offset ability is poor. The anti-offset ability of the common side direction of the type coil is extremely weak, and there are coupling and zero points

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