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Single/multi-layer magnetic conductive sheet for wireless charging and preparation method thereof

A technology of wireless charging and magnetic conductive sheet, which is applied in the manufacture of inductors/transformers/magnets, electromagnetic wave systems, circuits, etc., can solve the problems affecting the miniaturization development of wearable electronic terminals, not easy to continuously prepare, and the development of thin portable electronic terminals. and other problems, to achieve the effect of continuous and uniform insulation treatment process, improve charging efficiency, improve inductance and quality factor

Active Publication Date: 2015-09-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of ferrite materials is undoubtedly not conducive to the development of thin portable electronic terminals, and also affects the miniaturization of wearable electronic terminals.
[0009] In addition, as magnetic sheet materials for wireless charging, amorphous thin strips and nanocrystalline thin strips have the disadvantages of embrittlement after heat treatment and are not easy to be continuously prepared.

Method used

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  • Single/multi-layer magnetic conductive sheet for wireless charging and preparation method thereof
  • Single/multi-layer magnetic conductive sheet for wireless charging and preparation method thereof
  • Single/multi-layer magnetic conductive sheet for wireless charging and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0049] The method for preparing the single-layer magnetic conductive sheet for wireless charging includes the following steps:

[0050] The manufacturing steps of amorphous or nanocrystalline ribbons. The production of amorphous or nanocrystalline ribbons used in the method of the present invention is a conventional production method in the field, such as a rapid solidification method, which will not be repeated here.

[0051] In the heat treatment step, continuous heat treatment is performed on the coil of the amorphous or nanocrystalline strip, and the strip after the heat treatment is in a coil shape; preferably, the heat treatment temperature range of the amorphous strip is 380-520°C (for example, 385°C, 400°C, 420°C, 450°C, 460°C, 470°C, 490°C, 510°C), the heat treatment temperature range of the nanocrystalline ribbon is 450-650°C (such as 455°C, 470°C, 490°C, 520°C) , 550℃, 582℃, 600℃, 640℃). More preferably, the heat treatment time of the amorphous strip is 60-240min (such ...

Embodiment 7-12

[0086] The two single-layer magnetic permeable sheets of Example 1 are combined into a double-layer magnetic permeable sheet to obtain the double-layer magnetic permeable sheet of Example 7. The specific compounding method is as follows: First, peel off both sides of the single-layer magnetic permeable sheet The release film on the glue, and then the double-sided adhesive of the single-layer magnetic sheet of the release film from the glass is adhered to the protective film surface of the magnetic sheet of the other single-layer magnetic sheet, thereby forming the double According to this method, the two single-layer magnetic sheets of Example 2 are combined into a double-layer magnetic sheet to obtain the double-layer magnetic sheet of Example 8. The two single-layer magnetic sheets of Example 3 The magnetic conductive sheet is combined into a double-layer magnetic conductive sheet to obtain the double-layer magnetic conductive sheet of Example 9; the two single-layer magnetic ...

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Abstract

The invention discloses a single / multi-layer magnetic conductive sheet for wireless charging and a preparation method thereof. The single-layer magnetic conductive sheet comprises a layer of magnetic slice. Multiple strips of cracks are uniformly distributed on the slice and divide the slice into multiple fragment units. Gaps of the cracks are filled with insulation medium, so fragment units on two sides of the cracks are mutually insulated. The single-layer magnetic conductive sheet also comprises a double-faced adhesive tape which is adhered to one face of the magnetic slice. A protection film formed by the insulation medium is formed on the other face of the magnetic slice. The preparation method comprises steps of heat treatment, adhesion of the double-faced adhesive tape, crack processing, gum dipping processing and drying and curing processing. According to the invention, inductance value and quality factor of a charging coil are increased, charging efficiency is increased and loss is reduced. The continuously prepared magnetic conductive sheet is characterized by controllable magnetic conductivity, continuous production, convenient operation and simple insulation processing.

Description

Technical field [0001] The invention relates to a magnetic material used for the magnetic conductivity of the induction coil at the transmitting end and the receiving end in the field of wireless charging, and a method and device for preparing the material, and in particular to a single / multilayer magnetic sheet for wireless charging and a preparation method thereof. When portable terminals and other devices are charged in a wireless charging mode, the coupling efficiency of the charging coil is improved, the electromagnetic field interference of the transmitter and receiver to other circuits is prevented, and the magnetic path is provided for the alternating magnetic field of the transmitter and receiver coils to ensure the absolute maximum Part of the magnetic field lines are closed to improve the charging efficiency. Background technique [0002] Wireless charging technology refers to charging using the principle of electromagnetic wave induction, which is similar to a transfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/245H01F38/14H01F41/02H02J17/00H02J7/00
Inventor 卢志超刘天成刘志坚王湘粤朱景森关连宝唐冬冬李德仁
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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