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Magnetic shielding sheet for non-contact charging and application thereof

A magnetic shielding, non-contact technology, applied in the direction of preventing/reducing unwanted electric/magnetic influence, transformer/inductor cooling, etc., can solve the problem of not considering heat conduction, increase the die-cutting and bonding of amorphous tape composites Process complexity and other issues to achieve efficient heat dissipation

Inactive Publication Date: 2019-07-12
房亚鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned various schemes do not consider the heat conduction problem of the nanocrystalline ribbon and the amorphous ribbon in the magnetic nanoalloy ribbon composite or the magnetic amorphous ribbon composite, and the added graphite sheet will increase the die cutting of the amorphous ribbon composite. and the complexity of the bonding process

Method used

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  • Magnetic shielding sheet for non-contact charging and application thereof
  • Magnetic shielding sheet for non-contact charging and application thereof
  • Magnetic shielding sheet for non-contact charging and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The magnetic shielding sheet for non-contact charging of embodiment 1, such as figure 1 and figure 2 As shown, it includes: a magnetic alloy layer 2 with a thickness of 10-30 μm, the magnetic alloy layer 2 is formed by splicing a plurality of magnetic alloy sheets 21 laterally, and the two surfaces of the magnetic alloy layer 2 are respectively provided with heat dissipation layers 1 and the adhesive layer 3 , the composition of the heat dissipation layer 1 includes carbon nanotubes, and the surface of the adhesive layer 3 is provided with a release film 4 .

[0029] In Embodiment 1, an insulating layer (not shown in the figure) may also be provided between the plurality of magnetic alloy sheets 21 to further reduce the eddy current loss on the surface of the magnetic alloy layer 2 .

[0030] In Example 1, the magnetic alloy layer is made of iron-based amorphous alloy, specifically, the iron-based amorphous alloy is Fe-Si-B iron-based amorphous alloy, and its atomic p...

Embodiment 2

[0033] The magnetic shielding sheet for non-contact charging in Example 2 differs from Example 1 in that in Example 2, the composition of the heat dissipation layer 1 includes carbon nanotubes and graphene, and in the heat dissipation layer 1, solidified In terms of the mass of the final ink, the mass proportion of carbon nanotubes is 9%, and that of graphene is 6%.

Embodiment 3

[0034] The magnetic shielding sheet for non-contact charging of embodiment 3, such as image 3 As shown, it includes: four layers of magnetic alloy layers 2 stacked vertically with a thickness of 10-30 μm, each layer of magnetic alloy layer 2 is formed by splicing a plurality of magnetic alloy sheets 21 horizontally, and the two surfaces of each layer of magnetic alloy layer 2 Both are provided with a heat dissipation layer 1 and an adhesive layer 3, and the composition of the heat dissipation layer 1 includes carbon nanotubes.

[0035] The magnetic alloy layer in embodiment 3 is made of iron-based amorphous alloy, and its composition is the same as that in embodiment 1.

[0036] The preparation process of the magnetic shielding sheet for non-contact charging in Example 3 is as follows: the four-layer magnetic alloy layer 2 is subjected to a non-magnetic field heat treatment for 30 minutes to 2 hours in the temperature range of 300 ° C to 600 ° C, in order to obtain a higher ...

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Abstract

The invention discloses a magnetic shielding sheet for non-contact charging. The magnetic shielding sheet comprises a plurality of layers of magnetic alloy layers which are stacked vertically, each layer of the magnetic alloy layers is formed by laterally splicing a plurality of magnetic alloy sheets, at least one surface of at least one magnetic alloy layer is provided with a heat dissipation layer, and the composition of the heat dissipation layer includes carbon nanotubes or grapheme or a mixture of the carbon nanotubes and grapheme. The magnetic shielding sheet for non-contact charging provided by the invention contains the heat dissipation layer, the composition of the heat dissipation layer includes the carbon nanotubes or grapheme or the mixture of the carbon nanotubes and grapheme,and the high-efficient heat dissipation of the shielding sheet can be achieved. The magnetic shielding sheet can be applied to a portable terminal device with the need of non-contact charging such asa mobile phone, a watch, glasses, a wristband, a tablet computer, a notebook computer, an unmanned aerial vehicle, a sound system, a mouse, e-book equipment, an earphone, a television set and a charger and is used for managing the thermal effect generated by an alternating current electromagnetic field in the contactless charging.

Description

technical field [0001] The invention relates to a magnetic shielding sheet, in particular to a magnetic shielding sheet for non-contact charging and its application. The magnetic shielding sheet can be applied to mobile phones, watches, glasses, bracelets, tablet computers, notebooks, drones, Audio, mouse, e-book, earphone, TV, charger and other portable terminal equipment, magnetic shielding sheet used to manage the thermal effect of AC electromagnetic field in non-contact charging. Background technique [0002] Due to its high charging efficiency and non-contact electrode power supply method, non-contact charging is more and more popular in portable devices, such as mobile phones, watches, glasses and other terminals. Its characteristic is that the portable device can be charged without a charging port, which can meet the higher waterproof requirements and appearance design requirements of the device. [0003] In non-contact charging, an AC electromagnetic field transfers...

Claims

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Application Information

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IPC IPC(8): H01F27/08H01F27/22H01F27/36
CPCH01F27/08H01F27/22H01F27/36
Inventor 房亚鹏杨立章
Owner 房亚鹏
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