Electric automobile electromagnetic coupling wireless charging device

Abstract

The invention discloses an electric automobile electromagnetic coupling wireless charging device. The electric automobile electromagnetic coupling wireless charging device comprises a primary coil, a secondary coil, a rectification and filtration circuit and a charging information controller, wherein the primary coil is arranged underground and is flush with the ground, and the secondary coil is arranged on an automobile body chassis and is capable of being lifted to be aligned. The electric automobile electromagnetic coupling wireless charging device is characterized in that the primary coil and the secondary coil are of corresponding hemispherical annular iron core structures formed in the manner that turn number limiting windings are arranged at one end of each silicon steel wire bundle with the diameter ranging from 0.5 mm to 1 mm, the other ends of the silicon steel wire bundles are scattered, reversed and bent, the silicon steel wire bundles are insulated and are evenly distributed on circular rings which are flush with and are aligned with the bottom ends of the windings, and fixing and sealing are carried out through an insulation protection sleeve shell. Compared with the prior art, the electric automobile electromagnetic coupling wireless charging device has the advantages that the primary coil and the secondary coil do not have the directivity in the butt joint plane, alignment is easy, operation is easy and convenient, the parking direction is not limited, and the requirement for a construction field is lowered; the eddy current loss is low, energy efficiency is high, the heating phenomenon with the outside metal can be avoided, energy is saved, and the electric automobile electromagnetic coupling wireless charging device is safe; the charging operation without taking off an automobile and unattended charging station establishing can be achieved through an information control integration device.

Description

technical field [0001] The invention relates to an electromagnetically coupled wireless charging device for an electric vehicle. Background technique [0002] At present, as a new energy vehicle, the electric vehicle has a vigorous development trend, but most of its charging devices still stay in the existing socket type wired charging. Because the wired charging device is afraid of water entering outdoors and is easy to be damaged, there are potential safety hazards; at the same time, it also needs to occupy the ground and needs to be guarded; especially its power cannot be made too large, and the defect of long charging time is not easy to overcome. Therefore, can no longer meet the needs. [0003] In ZL201320116542.6, a high coupling coefficient wireless charging device for electric vehicles is disclosed. The device is characterized in that it is equipped with a moving device for adjusting the relative position of the primary coil and the secondary coil, and the purp...

AI Technical Summary

Problems solved by technology

But this device has the following defects: one is that the iron core of the coil is set as U-shaped, and because of the directionality of the U-shaped iron core, the alignment difficulty of the mobile device is increased; The third cover plate is a steel cover plate made of magnetically conductive material. This kind of cover plate will produce serious eddy current loss in practical application, not only the heat loss is serious, but also the high-speed charging may become an induction cooker; In the above design, there is a current inversion process, and the loss of electric energy is greater. The increase in frequency during inversion increases the thermal effect of the current on the steel cover made of magnetically conductive material.

Its disadvantages are: first, it cannot be sealed; second, the protruding parts are easy to wear; third, if the alignment is not accurate, the secondary coil on the top will be damaged to form a short circuit or open circuit; Generating eddy currents to generate heat, ranging from loss of electrical energy to burning

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