High-performance and high-frequency responsivity ferrite-based composite having laminated structure

Abstract

The invention discloses a high-performance and high-frequency responsivity ferrite-based composite having a laminated structure, which is formed by superposing an underlying material, a top layer material and a sandwich material in sequence, wherein the underlying material is a layer of black or sub-black non-transparent double-sided pressure-sensitive adhesive; the top layer material is a layer of black or sub-black single-sided glue; and the interlayer material is a magnetic material laminated structure which is formed by alternately laminating any two or three kinds of soft magnetic materials such as ferrite, nanocrystal and amorphous. Compared with the conventional ferrite, nanocrystalline and amorphous soft magnetic materials, the ferrite-based composite having the laminated structureprovided by the invention has the advantages of high magnetic saturation strength, wide frequency band and high-sensitive frequency response, high magnetic permeability, low magnetic loss and the like. The ferrite-based composite in the invention is applicable to a next generation of wireless charging transmitting end and receiving end and is particularly suitable for a non-contact resonant A4WPwireless charging scheme.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and in particular relates to a composite magnetic material with laminated structure, high performance and high frequency response for wireless charging. Background technique [0002] Nowadays, the field of wireless charging has rapidly penetrated into people's lives, especially in consumer electronics, medical electronics, industrial electronics and other related fields with broad prospects. Among them, mobile phones that support wireless charging will become more and more common, so the demand for wireless charging will also increase. [0003] Existing wireless charging is divided into forms such as magnetic coupling, magnetic resonance and microwave. However, the low-frequency (100-300KHz) magnetic coupling wireless charging method currently used in wireless charging of mobile phones requires the distance between the transmitting end and the receiving end to be on the order of millim...

AI Technical Summary

Problems solved by technology

However, the low-frequency (100-300KHz) magnetic coupling wireless charging method currently used in wireless charging of mobile phones requires the distance between the transmitting end and the receiving end to be on the order of millimeters, so remote charging cannot be realized.

The magnetic resonance-based wireless charging method has an operating frequency of 6-7MHz, but the existing traditional ferrite has disadvantages such as low magnetic saturation and easy saturation, which may easily lead to low magnetic permeability and magnetic resonance during wireless charging. The problem of high loss; and the existing nanocrystalline and amorphous have poor frequency response sensitivity, magnetic permeability and magnetic loss are not easy to optimize, etc.

It can be seen that none of the above three forms of wireless charging can meet the performance and reliability requirements of the new generation of wireless charging technology for magnetic materials.

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