Single/multilayer 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, circuits, inductors, etc., can solve the problem of difficult continuous preparation, unfavorable development of thin portable electronic terminals, and impact on the miniaturization of wearable electronic terminals. and other problems, to achieve the effect of continuous and uniform insulation treatment process, improved charging efficiency and easy control

Active Publication Date: 2017-04-19
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/multilayer magnetic conductive sheet for wireless charging and preparation method thereof
  • Single/multilayer magnetic conductive sheet for wireless charging and preparation method thereof
  • Single/multilayer magnetic conductive sheet for wireless charging and preparation method thereof

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preparation example Construction

[0049] The preparation method of the above-mentioned single-layer magnetically conductive sheet for wireless charging includes the following steps:

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

[0051] In the heat treatment step, continuous heat treatment is carried out on the coil of the amorphous or nanocrystalline strip, and the strip after heat treatment is in the form of a coil; preferably, the heat treatment temperature range of the amorphous strip is 380-520°C (such as 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°C, 582°C, 600°C, 640°C). More preferably, the heat treatment time of ...

Embodiment 7-12

[0086] Composite the two single-layer magnetically conductive sheets of Example 1 to make a double-layer magnetically conductive sheet to obtain the double-layer magnetically conductive sheet of Example 7. The specific compounding method is as follows: first, peel off the double-sided magnetically conductive sheet of the single-layer magnetically conductive sheet The release film on the glue, and then the double-sided adhesive of the single-layer magnetic-conductive sheet of the glass-off release film is adhered to the protective film face of the magnetic sheet of another single-layer magnetic-conductive sheet, thereby forming the double-sided tape of embodiment 7. Layer magnetically conductive sheet; According to this method, 2 single-layer magnetically conductive sheets of embodiment 2 are compounded into double-layer magnetically conductive sheets, which obtains the double-layer magnetically conductive sheet of embodiment 8; 2 single-layer magnetically conductive sheets of em...

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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 for transmitting and receiving induction coils in the field of wireless charging, as well as a method and a device for preparing the material, in particular to a single / multilayer magnetically conductive sheet for wireless charging and a preparation method thereof, which is used for When portable terminals and other devices are charged by wireless charging, the coupling efficiency of the charging coil is improved, the electromagnetic field interference of the transmitting end and the receiving end to other circuits is prevented, and the magnetic path is provided for the alternating magnetic field of the transmitting end and the receiving end coil, ensuring a maximum Some magnetic force lines are closed to improve charging efficiency. Background technique [0002] Wireless charging technology refers to charging using the principle of electromagnetic wave induction, which is similar to a transformer. There is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/245H01F38/14H01F41/02H02J50/10H02J7/00
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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